New upstream version 1.6.0+dfsgupstream/1.6.0+dfsg

1 files changed, 368 insertions, 2765 deletions

diff --git a/src/health.c b/src/health.c
index 193312eec..46b27db6f 100755..100644
--- a/src/health.c
+++ b/src/health.c
@@ -1,2588 +1,84 @@
+#define NETDATA_HEALTH_INTERNALS
 #include "common.h"
 
-#define RRDVAR_MAX_LENGTH 1024
-
-struct health_options {
-    const char *health_default_exec;
-    const char *health_default_recipient;
-    const char *log_filename;
-    size_t log_entries_written;
-    FILE *log_fp;
-};
-
-static struct health_options health = {
-    .health_default_exec = PLUGINS_DIR "/alarm-notify.sh",
-    .health_default_recipient = "root",
-    .log_filename = VARLIB_DIR "/health/alarm_log.db",
-    .log_entries_written = 0,
-    .log_fp = NULL
-};
-
-int health_enabled = 1;
-
-// ----------------------------------------------------------------------------
-// health alarm log load/save
-// no need for locking - only one thread is reading / writing the alarms log
-
-static inline int health_alarm_log_open(void) {
-    if(health.log_fp)
-        fclose(health.log_fp);
-
-    health.log_fp = fopen(health.log_filename, "a");
-
-    if(health.log_fp) {
-        if (setvbuf(health.log_fp, NULL, _IOLBF, 0) != 0)
-            error("Health: cannot set line buffering on health log file.");
-        return 0;
-    }
-
-    error("Health: cannot open health log file '%s'. Health data will be lost in case of netdata or server crash.", health.log_filename);
-    return -1;
-}
-
-static inline void health_alarm_log_close(void) {
-    if(health.log_fp) {
-        fclose(health.log_fp);
-        health.log_fp = NULL;
-    }
-}
-
-static inline void health_log_rotate(void) {
-    static size_t rotate_every = 0;
-
-    if(unlikely(rotate_every == 0)) {
-        rotate_every = (size_t)config_get_number("health", "rotate log every lines", 2000);
-        if(rotate_every < 100) rotate_every = 100;
-    }
-
-    if(unlikely(health.log_entries_written > rotate_every)) {
-        health_alarm_log_close();
-
-        char old_filename[FILENAME_MAX + 1];
-        snprintfz(old_filename, FILENAME_MAX, "%s.old", health.log_filename);
-
-        if(unlink(old_filename) == -1 && errno != ENOENT)
-            error("Health: cannot remove old alarms log file '%s'", old_filename);
-
-        if(link(health.log_filename, old_filename) == -1 && errno != ENOENT)
-            error("Health: cannot move file '%s' to '%s'.", health.log_filename, old_filename);
-
-        if(unlink(health.log_filename) == -1 && errno != ENOENT)
-            error("Health: cannot remove old alarms log file '%s'", health.log_filename);
-
-        // open it with truncate
-        health.log_fp = fopen(health.log_filename, "w");
-
-        if(health.log_fp)
-            fclose(health.log_fp);
-        else
-            error("Health: cannot truncate health log '%s'", health.log_filename);
-
-        health.log_fp = NULL;
-
-        health.log_entries_written = 0;
-        health_alarm_log_open();
-    }
-}
-
-static inline void health_alarm_log_save(RRDHOST *host, ALARM_ENTRY *ae) {
-    health_log_rotate();
-
-    if(likely(health.log_fp)) {
-        if(unlikely(fprintf(health.log_fp
-                , "%c\t%s"
-                  "\t%08x\t%08x\t%08x\t%08x\t%08x"
-                  "\t%08x\t%08x\t%08x"
-                  "\t%08x\t%08x\t%08x"
-                  "\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s"
-                  "\t%d\t%d\t%d\t%d"
-                  "\t%Lf\t%Lf"
-                  "\n"
-                , (ae->flags & HEALTH_ENTRY_FLAG_SAVED)?'U':'A'
-                , host->hostname
-
-                , ae->unique_id
-                , ae->alarm_id
-                , ae->alarm_event_id
-                , ae->updated_by_id
-                , ae->updates_id
-
-                , (uint32_t)ae->when
-                , (uint32_t)ae->duration
-                , (uint32_t)ae->non_clear_duration
-                , (uint32_t)ae->flags
-                , (uint32_t)ae->exec_run_timestamp
-                , (uint32_t)ae->delay_up_to_timestamp
-
-                , (ae->name)?ae->name:""
-                , (ae->chart)?ae->chart:""
-                , (ae->family)?ae->family:""
-                , (ae->exec)?ae->exec:""
-                , (ae->recipient)?ae->recipient:""
-                , (ae->source)?ae->source:""
-                , (ae->units)?ae->units:""
-                , (ae->info)?ae->info:""
-
-                , ae->exec_code
-                , ae->new_status
-                , ae->old_status
-                , ae->delay
-
-                , (long double)ae->new_value
-                , (long double)ae->old_value
-        ) < 0))
-            error("Health: failed to save alarm log entry. Health data may be lost in case of abnormal restart.");
-        else {
-            ae->flags |= HEALTH_ENTRY_FLAG_SAVED;
-            health.log_entries_written++;
-        }
-    }
-}
-
-static inline ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filename) {
-    static uint32_t max_unique_id = 0, max_alarm_id = 0;
-
-    errno = 0;
-
-    char *s, *buf = mallocz(65536 + 1);
-    size_t line = 0, len = 0;
-    ssize_t loaded = 0, updated = 0, errored = 0, duplicate = 0;
-
-    pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
-
-    while((s = fgets_trim_len(buf, 65536, fp, &len))) {
-        health.log_entries_written++;
-        line++;
-
-        int max_entries = 30, entries = 0;
-        char *pointers[max_entries];
-
-        pointers[entries++] = s++;
-        while(*s) {
-            if(unlikely(*s == '\t')) {
-                *s = '\0';
-                pointers[entries++] = ++s;
-                if(entries >= max_entries) {
-                    error("Health: line %zu of file '%s' has more than %d entries. Ignoring excessive entries.", line, filename, max_entries);
-                    break;
-                }
-            }
-            else s++;
-        }
-
-        if(likely(*pointers[0] == 'U' || *pointers[0] == 'A')) {
-            ALARM_ENTRY *ae = NULL;
-
-            if(entries < 26) {
-                error("Health: line %zu of file '%s' should have at least 26 entries, but it has %d. Ignoring it.", line, filename, entries);
-                errored++;
-                continue;
-            }
-
-            // check that we have valid ids
-            uint32_t unique_id = (uint32_t)strtoul(pointers[2], NULL, 16);
-            if(!unique_id) {
-                error("Health: line %zu of file '%s' states alarm entry with invalid unique id %u (%s). Ignoring it.", line, filename, unique_id, pointers[2]);
-                errored++;
-                continue;
-            }
-
-            uint32_t alarm_id = (uint32_t)strtoul(pointers[3], NULL, 16);
-            if(!alarm_id) {
-                error("Health: line %zu of file '%s' states alarm entry for invalid alarm id %u (%s). Ignoring it.", line, filename, alarm_id, pointers[3]);
-                errored++;
-                continue;
-            }
-
-            if(unlikely(*pointers[0] == 'A')) {
-                // make sure it is properly numbered
-                if(unlikely(host->health_log.alarms && unique_id < host->health_log.alarms->unique_id)) {
-                    error("Health: line %zu of file '%s' has alarm log entry with %u in wrong order. Ignoring it.", line, filename, unique_id);
-                    errored++;
-                    continue;
-                }
-
-                ae = callocz(1, sizeof(ALARM_ENTRY));
-            }
-            else if(unlikely(*pointers[0] == 'U')) {
-                // find the original
-                for(ae = host->health_log.alarms; ae; ae = ae->next) {
-                    if(unlikely(unique_id == ae->unique_id)) {
-                        if(unlikely(*pointers[0] == 'A')) {
-                            error("Health: line %zu of file '%s' adds duplicate alarm log entry with unique id %u. Using the later."
-                                  , line, filename, unique_id);
-                            *pointers[0] = 'U';
-                            duplicate++;
-                        }
-                        break;
-                    }
-                    else if(unlikely(unique_id > ae->unique_id)) {
-                        // no need to continue
-                        // the linked list is sorted
-                        ae = NULL;
-                        break;
-                    }
-                }
-
-                // if not found, skip this line
-                if(!ae) {
-                    // error("Health: line %zu of file '%s' updates alarm log entry with unique id %u, but it is not found.", line, filename, unique_id);
-                    continue;
-                }
-            }
-
-            // check for a possible host missmatch
-            //if(strcmp(pointers[1], host->hostname))
-            //    error("Health: line %zu of file '%s' provides an alarm for host '%s' but this is named '%s'.", line, filename, pointers[1], host->hostname);
-
-            ae->unique_id               = unique_id;
-            ae->alarm_id                = alarm_id;
-            ae->alarm_event_id          = (uint32_t)strtoul(pointers[4], NULL, 16);
-            ae->updated_by_id           = (uint32_t)strtoul(pointers[5], NULL, 16);
-            ae->updates_id              = (uint32_t)strtoul(pointers[6], NULL, 16);
-
-            ae->when                    = (uint32_t)strtoul(pointers[7], NULL, 16);
-            ae->duration                = (uint32_t)strtoul(pointers[8], NULL, 16);
-            ae->non_clear_duration      = (uint32_t)strtoul(pointers[9], NULL, 16);
-
-            ae->flags                   = (uint32_t)strtoul(pointers[10], NULL, 16);
-            ae->flags |= HEALTH_ENTRY_FLAG_SAVED;
-
-            ae->exec_run_timestamp      = (uint32_t)strtoul(pointers[11], NULL, 16);
-            ae->delay_up_to_timestamp   = (uint32_t)strtoul(pointers[12], NULL, 16);
-
-            if(unlikely(ae->name)) freez(ae->name);
-            ae->name = strdupz(pointers[13]);
-            ae->hash_name = simple_hash(ae->name);
-
-            if(unlikely(ae->chart)) freez(ae->chart);
-            ae->chart = strdupz(pointers[14]);
-            ae->hash_chart = simple_hash(ae->chart);
-
-            if(unlikely(ae->family)) freez(ae->family);
-            ae->family = strdupz(pointers[15]);
-
-            if(unlikely(ae->exec)) freez(ae->exec);
-            ae->exec = strdupz(pointers[16]);
-            if(!*ae->exec) { freez(ae->exec); ae->exec = NULL; }
-
-            if(unlikely(ae->recipient)) freez(ae->recipient);
-            ae->recipient = strdupz(pointers[17]);
-            if(!*ae->recipient) { freez(ae->recipient); ae->recipient = NULL; }
-
-            if(unlikely(ae->source)) freez(ae->source);
-            ae->source = strdupz(pointers[18]);
-            if(!*ae->source) { freez(ae->source); ae->source = NULL; }
-
-            if(unlikely(ae->units)) freez(ae->units);
-            ae->units = strdupz(pointers[19]);
-            if(!*ae->units) { freez(ae->units); ae->units = NULL; }
-
-            if(unlikely(ae->info)) freez(ae->info);
-            ae->info = strdupz(pointers[20]);
-            if(!*ae->info) { freez(ae->info); ae->info = NULL; }
-
-            ae->exec_code   = str2i(pointers[21]);
-            ae->new_status  = str2i(pointers[22]);
-            ae->old_status  = str2i(pointers[23]);
-            ae->delay       = str2i(pointers[24]);
-
-            ae->new_value   = str2l(pointers[25]);
-            ae->old_value   = str2l(pointers[26]);
-
-            // add it to host if not already there
-            if(unlikely(*pointers[0] == 'A')) {
-                ae->next = host->health_log.alarms;
-                host->health_log.alarms = ae;
-                loaded++;
-            }
-            else updated++;
-
-            if(unlikely(ae->unique_id > max_unique_id))
-                max_unique_id = ae->unique_id;
-
-            if(unlikely(ae->alarm_id >= max_alarm_id))
-                max_alarm_id = ae->alarm_id;
-        }
-        else {
-            error("Health: line %zu of file '%s' is invalid (unrecognized entry type '%s').", line, filename, pointers[0]);
-            errored++;
-        }
-    }
-
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
-
-    freez(buf);
-
-    if(!max_unique_id) max_unique_id = (uint32_t)now_realtime_sec();
-    if(!max_alarm_id)  max_alarm_id  = (uint32_t)now_realtime_sec();
-
-    host->health_log.next_log_id = max_unique_id + 1;
-    host->health_log.next_alarm_id = max_alarm_id + 1;
-
-    debug(D_HEALTH, "Health: loaded file '%s' with %zd new alarm entries, updated %zd alarms, errors %zd entries, duplicate %zd", filename, loaded, updated, errored, duplicate);
-    return loaded;
-}
-
-static inline void health_alarm_log_load(RRDHOST *host) {
-    health_alarm_log_close();
-
-    char filename[FILENAME_MAX + 1];
-    snprintfz(filename, FILENAME_MAX, "%s.old", health.log_filename);
-    FILE *fp = fopen(filename, "r");
-    if(!fp)
-        error("Health: cannot open health file: %s", filename);
-    else {
-        health_alarm_log_read(host, fp, filename);
-        fclose(fp);
-    }
-
-    health.log_entries_written = 0;
-    fp = fopen(health.log_filename, "r");
-    if(!fp)
-        error("Health: cannot open health file: %s", health.log_filename);
-    else {
-        health_alarm_log_read(host, fp, health.log_filename);
-        fclose(fp);
-    }
-
-    health_alarm_log_open();
-}
-
-
-// ----------------------------------------------------------------------------
-// health alarm log management
-
-static inline void health_alarm_log(RRDHOST *host,
-                uint32_t alarm_id, uint32_t alarm_event_id,
-                time_t when,
-                const char *name, const char *chart, const char *family,
-                const char *exec, const char *recipient, time_t duration,
-                calculated_number old_value, calculated_number new_value,
-                int old_status, int new_status,
-                const char *source,
-                const char *units,
-                const char *info,
-                int delay
-) {
-    debug(D_HEALTH, "Health adding alarm log entry with id: %u", host->health_log.next_log_id);
-
-    ALARM_ENTRY *ae = callocz(1, sizeof(ALARM_ENTRY));
-    ae->name = strdupz(name);
-    ae->hash_name = simple_hash(ae->name);
-
-    if(chart) {
-        ae->chart = strdupz(chart);
-        ae->hash_chart = simple_hash(ae->chart);
-    }
-
-    if(family)
-        ae->family = strdupz(family);
-
-    if(exec) ae->exec = strdupz(exec);
-    if(recipient) ae->recipient = strdupz(recipient);
-    if(source) ae->source = strdupz(source);
-    if(units) ae->units = strdupz(units);
-    if(info) ae->info = strdupz(info);
-
-    ae->unique_id = host->health_log.next_log_id++;
-    ae->alarm_id = alarm_id;
-    ae->alarm_event_id = alarm_event_id;
-    ae->when = when;
-    ae->old_value = old_value;
-    ae->new_value = new_value;
-    ae->old_status = old_status;
-    ae->new_status = new_status;
-    ae->duration = duration;
-    ae->delay = delay;
-    ae->delay_up_to_timestamp = when + delay;
-
-    if(ae->old_status == RRDCALC_STATUS_WARNING || ae->old_status == RRDCALC_STATUS_CRITICAL)
-        ae->non_clear_duration += ae->duration;
-
-    // link it
-    pthread_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
-    ae->next = host->health_log.alarms;
-    host->health_log.alarms = ae;
-    host->health_log.count++;
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
-
-    // match previous alarms
-    pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
-    ALARM_ENTRY *t;
-    for(t = host->health_log.alarms ; t ; t = t->next) {
-        if(t != ae && t->alarm_id == ae->alarm_id) {
-            if(!(t->flags & HEALTH_ENTRY_FLAG_UPDATED) && !t->updated_by_id) {
-                t->flags |= HEALTH_ENTRY_FLAG_UPDATED;
-                t->updated_by_id = ae->unique_id;
-                ae->updates_id = t->unique_id;
-
-                if((t->new_status == RRDCALC_STATUS_WARNING || t->new_status == RRDCALC_STATUS_CRITICAL) &&
-                   (t->old_status == RRDCALC_STATUS_WARNING || t->old_status == RRDCALC_STATUS_CRITICAL))
-                    ae->non_clear_duration += t->non_clear_duration;
-
-                health_alarm_log_save(host, t);
-            }
-
-            // no need to continue
-            break;
-        }
-    }
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
-
-    health_alarm_log_save(host, ae);
-}
-
-// ----------------------------------------------------------------------------
-// RRDVAR management
-
-static inline int rrdvar_fix_name(char *variable) {
-    int fixed = 0;
-    while(*variable) {
-        if (!isalnum(*variable) && *variable != '.' && *variable != '_') {
-            *variable++ = '_';
-            fixed++;
-        }
-        else
-            variable++;
-    }
-
-    return fixed;
-}
-
-int rrdvar_compare(void* a, void* b) {
-    if(((RRDVAR *)a)->hash < ((RRDVAR *)b)->hash) return -1;
-    else if(((RRDVAR *)a)->hash > ((RRDVAR *)b)->hash) return 1;
-    else return strcmp(((RRDVAR *)a)->name, ((RRDVAR *)b)->name);
-}
-
-static inline RRDVAR *rrdvar_index_add(avl_tree_lock *tree, RRDVAR *rv) {
-    RRDVAR *ret = (RRDVAR *)avl_insert_lock(tree, (avl *)(rv));
-    if(ret != rv)
-        debug(D_VARIABLES, "Request to insert RRDVAR '%s' into index failed. Already exists.", rv->name);
-
-    return ret;
-}
-
-static inline RRDVAR *rrdvar_index_del(avl_tree_lock *tree, RRDVAR *rv) {
-    RRDVAR *ret = (RRDVAR *)avl_remove_lock(tree, (avl *)(rv));
-    if(!ret)
-        error("Request to remove RRDVAR '%s' from index failed. Not Found.", rv->name);
-
-    return ret;
-}
-
-static inline RRDVAR *rrdvar_index_find(avl_tree_lock *tree, const char *name, uint32_t hash) {
-    RRDVAR tmp;
-    tmp.name = (char *)name;
-    tmp.hash = (hash)?hash:simple_hash(tmp.name);
-
-    return (RRDVAR *)avl_search_lock(tree, (avl *)&tmp);
-}
-
-static inline void rrdvar_free(RRDHOST *host, avl_tree_lock *tree, RRDVAR *rv) {
-    (void)host;
-
-    if(!rv) return;
-
-    if(tree) {
-        debug(D_VARIABLES, "Deleting variable '%s'", rv->name);
-        if(unlikely(!rrdvar_index_del(tree, rv)))
-            error("Attempted to delete variable '%s' from host '%s', but it is not found.", rv->name, host->hostname);
-    }
-
-    freez(rv->name);
-    freez(rv);
-}
-
-static inline RRDVAR *rrdvar_create_and_index(const char *scope, avl_tree_lock *tree, const char *name, int type, void *value) {
-    char *variable = strdupz(name);
-    rrdvar_fix_name(variable);
-    uint32_t hash = simple_hash(variable);
-
-    RRDVAR *rv = rrdvar_index_find(tree, variable, hash);
-    if(unlikely(!rv)) {
-        debug(D_VARIABLES, "Variable '%s' not found in scope '%s'. Creating a new one.", variable, scope);
-
-        rv = callocz(1, sizeof(RRDVAR));
-        rv->name = variable;
-        rv->hash = hash;
-        rv->type = type;
-        rv->value = value;
-
-        RRDVAR *ret = rrdvar_index_add(tree, rv);
-        if(unlikely(ret != rv)) {
-            debug(D_VARIABLES, "Variable '%s' in scope '%s' already exists", variable, scope);
-            rrdvar_free(NULL, NULL, rv);
-            rv = NULL;
-        }
-        else
-            debug(D_VARIABLES, "Variable '%s' created in scope '%s'", variable, scope);
-    }
-    else {
-        debug(D_VARIABLES, "Variable '%s' is already found in scope '%s'.", variable, scope);
-
-        // already exists
-        freez(variable);
-
-        // this is important
-        // it must return NULL - not the existing variable - or double-free will happen
-        rv = NULL;
-    }
-
-    return rv;
-}
-
-// ----------------------------------------------------------------------------
-// CUSTOM VARIABLES
-
-RRDVAR *rrdvar_custom_host_variable_create(RRDHOST *host, const char *name) {
-    calculated_number *v = callocz(1, sizeof(calculated_number));
-    *v = NAN;
-    RRDVAR *rv = rrdvar_create_and_index("host", &host->variables_root_index, name, RRDVAR_TYPE_CALCULATED_ALLOCATED, v);
-    if(unlikely(!rv)) {
-        free(v);
-        error("Requested variable '%s' already exists - possibly 2 plugins will be updating it at the same time", name);
-
-        char *variable = strdupz(name);
-        rrdvar_fix_name(variable);
-        uint32_t hash = simple_hash(variable);
-
-        rv = rrdvar_index_find(&host->variables_root_index, variable, hash);
-    }
-
-    return rv;
-}
-
-void rrdvar_custom_host_variable_destroy(RRDHOST *host, const char *name) {
-    char *variable = strdupz(name);
-    rrdvar_fix_name(variable);
-    uint32_t hash = simple_hash(variable);
-
-    RRDVAR *rv = rrdvar_index_find(&host->variables_root_index, variable, hash);
-    freez(variable);
-
-    if(!rv) {
-        error("Attempted to remove variable '%s' from host '%s', but it does not exist.", name, host->hostname);
-        return;
-    }
-
-    if(rv->type != RRDVAR_TYPE_CALCULATED_ALLOCATED) {
-        error("Attempted to remove variable '%s' from host '%s', but it does not a custom allocated variable.", name, host->hostname);
-        return;
-    }
-
-    if(!rrdvar_index_del(&host->variables_root_index, rv)) {
-        error("Attempted to remove variable '%s' from host '%s', but it cannot be found.", name, host->hostname);
-        return;
-    }
-
-    freez(rv->name);
-    freez(rv->value);
-    freez(rv);
-}
-
-void rrdvar_custom_host_variable_set(RRDVAR *rv, calculated_number value) {
-    if(rv->type != RRDVAR_TYPE_CALCULATED_ALLOCATED)
-        error("requested to set variable '%s' to value " CALCULATED_NUMBER_FORMAT " but the variable is not a custom one.", rv->name, value);
-    else {
-        calculated_number *v = rv->value;
-        *v = value;
-    }
-}
-
-// ----------------------------------------------------------------------------
-// RRDVAR lookup
-
-static calculated_number rrdvar2number(RRDVAR *rv) {
-    switch(rv->type) {
-        case RRDVAR_TYPE_CALCULATED_ALLOCATED:
-        case RRDVAR_TYPE_CALCULATED: {
-            calculated_number *n = (calculated_number *)rv->value;
-            return *n;
-        }
-
-        case RRDVAR_TYPE_TIME_T: {
-            time_t *n = (time_t *)rv->value;
-            return *n;
-        }
-
-        case RRDVAR_TYPE_COLLECTED: {
-            collected_number *n = (collected_number *)rv->value;
-            return *n;
-        }
-
-        case RRDVAR_TYPE_TOTAL: {
-            total_number *n = (total_number *)rv->value;
-            return *n;
-        }
-
-        case RRDVAR_TYPE_INT: {
-            int *n = (int *)rv->value;
-            return *n;
-        }
-
-        default:
-            error("I don't know how to convert RRDVAR type %d to calculated_number", rv->type);
-            return NAN;
-    }
-}
-
-int health_variable_lookup(const char *variable, uint32_t hash, RRDCALC *rc, calculated_number *result) {
-    RRDSET *st = rc->rrdset;
-    RRDVAR *rv;
-
-    if(!st) return 0;
-
-    rv = rrdvar_index_find(&st->variables_root_index, variable, hash);
-    if(rv) {
-        *result = rrdvar2number(rv);
-        return 1;
-    }
-
-    rv = rrdvar_index_find(&st->rrdfamily->variables_root_index, variable, hash);
-    if(rv) {
-        *result = rrdvar2number(rv);
-        return 1;
-    }
-
-    rv = rrdvar_index_find(&st->rrdhost->variables_root_index, variable, hash);
-    if(rv) {
-        *result = rrdvar2number(rv);
-        return 1;
-    }
-
-    return 0;
-}
-
-// ----------------------------------------------------------------------------
-// RRDVAR to JSON
-
-struct variable2json_helper {
-    BUFFER *buf;
-    size_t counter;
-};
-
-static int single_variable2json(void *entry, void *data) {
-    struct variable2json_helper *helper = (struct variable2json_helper *)data;
-    RRDVAR *rv = (RRDVAR *)entry;
-    calculated_number value = rrdvar2number(rv);
-
-    if(unlikely(isnan(value) || isinf(value)))
-        buffer_sprintf(helper->buf, "%s\n\t\t\"%s\": null", helper->counter?",":"", rv->name);
-    else
-        buffer_sprintf(helper->buf, "%s\n\t\t\"%s\": %0.5Lf", helper->counter?",":"", rv->name, (long double)value);
-
-    helper->counter++;
-
-    return 0;
-}
-
-void health_api_v1_chart_variables2json(RRDSET *st, BUFFER *buf) {
-    struct variable2json_helper helper = {
-            .buf = buf,
-            .counter = 0
-    };
-
-    buffer_sprintf(buf, "{\n\t\"chart\": \"%s\",\n\t\"chart_name\": \"%s\",\n\t\"chart_context\": \"%s\",\n\t\"chart_variables\": {", st->id, st->name, st->context);
-    avl_traverse_lock(&st->variables_root_index, single_variable2json, (void *)&helper);
-    buffer_sprintf(buf, "\n\t},\n\t\"family\": \"%s\",\n\t\"family_variables\": {", st->family);
-    helper.counter = 0;
-    avl_traverse_lock(&st->rrdfamily->variables_root_index, single_variable2json, (void *)&helper);
-    buffer_sprintf(buf, "\n\t},\n\t\"host\": \"%s\",\n\t\"host_variables\": {", st->rrdhost->hostname);
-    helper.counter = 0;
-    avl_traverse_lock(&st->rrdhost->variables_root_index, single_variable2json, (void *)&helper);
-    buffer_strcat(buf, "\n\t}\n}\n");
-}
-
-
-// ----------------------------------------------------------------------------
-// RRDDIMVAR management
-// DIMENSION VARIABLES
-
-#define RRDDIMVAR_ID_MAX 1024
-
-static inline void rrddimvar_free_variables(RRDDIMVAR *rs) {
-    RRDDIM *rd = rs->rrddim;
-    RRDSET *st = rd->rrdset;
-
-    // CHART VARIABLES FOR THIS DIMENSION
-
-    rrdvar_free(st->rrdhost, &st->variables_root_index, rs->var_local_id);
-    rs->var_local_id = NULL;
-
-    rrdvar_free(st->rrdhost, &st->variables_root_index, rs->var_local_name);
-    rs->var_local_name = NULL;
-
-    // FAMILY VARIABLES FOR THIS DIMENSION
-
-    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family_id);
-    rs->var_family_id = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family_name);
-    rs->var_family_name = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family_contextid);
-    rs->var_family_contextid = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family_contextname);
-    rs->var_family_contextname = NULL;
-
-    // HOST VARIABLES FOR THIS DIMENSION
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host_chartidid);
-    rs->var_host_chartidid = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host_chartidname);
-    rs->var_host_chartidname = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host_chartnameid);
-    rs->var_host_chartnameid = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host_chartnamename);
-    rs->var_host_chartnamename = NULL;
-
-    // KEYS
-
-    freez(rs->key_id);
-    rs->key_id = NULL;
-
-    freez(rs->key_name);
-    rs->key_name = NULL;
-
-    freez(rs->key_fullidid);
-    rs->key_fullidid = NULL;
-
-    freez(rs->key_fullidname);
-    rs->key_fullidname = NULL;
-
-    freez(rs->key_contextid);
-    rs->key_contextid = NULL;
-
-    freez(rs->key_contextname);
-    rs->key_contextname = NULL;
-
-    freez(rs->key_fullnameid);
-    rs->key_fullnameid = NULL;
-
-    freez(rs->key_fullnamename);
-    rs->key_fullnamename = NULL;
-}
-
-static inline void rrddimvar_create_variables(RRDDIMVAR *rs) {
-    rrddimvar_free_variables(rs);
-
-    RRDDIM *rd = rs->rrddim;
-    RRDSET *st = rd->rrdset;
-
-    char buffer[RRDDIMVAR_ID_MAX + 1];
-
-    // KEYS
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s%s%s", rs->prefix, rd->id, rs->suffix);
-    rs->key_id = strdupz(buffer);
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s%s%s", rs->prefix, rd->name, rs->suffix);
-    rs->key_name = strdupz(buffer);
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->id, rs->key_id);
-    rs->key_fullidid = strdupz(buffer);
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->id, rs->key_name);
-    rs->key_fullidname = strdupz(buffer);
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->context, rs->key_id);
-    rs->key_contextid = strdupz(buffer);
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->context, rs->key_name);
-    rs->key_contextname = strdupz(buffer);
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->name, rs->key_id);
-    rs->key_fullnameid = strdupz(buffer);
-
-    snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->name, rs->key_name);
-    rs->key_fullnamename = strdupz(buffer);
-
-    // CHART VARIABLES FOR THIS DIMENSION
-    // -----------------------------------
-    //
-    // dimensions are available as:
-    // - $id
-    // - $name
-
-    rs->var_local_id           = rrdvar_create_and_index("local", &st->variables_root_index, rs->key_id, rs->type, rs->value);
-    rs->var_local_name         = rrdvar_create_and_index("local", &st->variables_root_index, rs->key_name, rs->type, rs->value);
-
-    // FAMILY VARIABLES FOR THIS DIMENSION
-    // -----------------------------------
-    //
-    // dimensions are available as:
-    // - $id                 (only the first, when multiple overlap)
-    // - $name               (only the first, when multiple overlap)
-    // - $chart-context.id
-    // - $chart-context.name
-
-    rs->var_family_id          = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->key_id, rs->type, rs->value);
-    rs->var_family_name        = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->key_name, rs->type, rs->value);
-    rs->var_family_contextid   = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->key_contextid, rs->type, rs->value);
-    rs->var_family_contextname = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->key_contextname, rs->type, rs->value);
-
-    // HOST VARIABLES FOR THIS DIMENSION
-    // -----------------------------------
-    //
-    // dimensions are available as:
-    // - $chart-id.id
-    // - $chart-id.name
-    // - $chart-name.id
-    // - $chart-name.name
-
-    rs->var_host_chartidid      = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->key_fullidid, rs->type, rs->value);
-    rs->var_host_chartidname    = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->key_fullidname, rs->type, rs->value);
-    rs->var_host_chartnameid    = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->key_fullnameid, rs->type, rs->value);
-    rs->var_host_chartnamename  = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->key_fullnamename, rs->type, rs->value);
-}
-
-RRDDIMVAR *rrddimvar_create(RRDDIM *rd, int type, const char *prefix, const char *suffix, void *value, uint32_t options) {
-    RRDSET *st = rd->rrdset;
-
-    debug(D_VARIABLES, "RRDDIMSET create for chart id '%s' name '%s', dimension id '%s', name '%s%s%s'", st->id, st->name, rd->id, (prefix)?prefix:"", rd->name, (suffix)?suffix:"");
-
-    if(!prefix) prefix = "";
-    if(!suffix) suffix = "";
-
-    RRDDIMVAR *rs = (RRDDIMVAR *)callocz(1, sizeof(RRDDIMVAR));
-
-    rs->prefix = strdupz(prefix);
-    rs->suffix = strdupz(suffix);
-
-    rs->type = type;
-    rs->value = value;
-    rs->options = options;
-    rs->rrddim = rd;
-
-    rs->next = rd->variables;
-    rd->variables = rs;
-
-    rrddimvar_create_variables(rs);
-
-    return rs;
-}
-
-void rrddimvar_rename_all(RRDDIM *rd) {
-    RRDSET *st = rd->rrdset;
-    debug(D_VARIABLES, "RRDDIMSET rename for chart id '%s' name '%s', dimension id '%s', name '%s'", st->id, st->name, rd->id, rd->name);
-
-    RRDDIMVAR *rs, *next = rd->variables;
-    while((rs = next)) {
-        next = rs->next;
-        rrddimvar_create_variables(rs);
-    }
-}
-
-void rrddimvar_free(RRDDIMVAR *rs) {
-    RRDDIM *rd = rs->rrddim;
-    RRDSET *st = rd->rrdset;
-    debug(D_VARIABLES, "RRDDIMSET free for chart id '%s' name '%s', dimension id '%s', name '%s', prefix='%s', suffix='%s'", st->id, st->name, rd->id, rd->name, rs->prefix, rs->suffix);
-
-    rrddimvar_free_variables(rs);
-
-    if(rd->variables == rs) {
-        debug(D_VARIABLES, "RRDDIMSET removing first entry for chart id '%s' name '%s', dimension id '%s', name '%s'", st->id, st->name, rd->id, rd->name);
-        rd->variables = rs->next;
-    }
-    else {
-        debug(D_VARIABLES, "RRDDIMSET removing non-first entry for chart id '%s' name '%s', dimension id '%s', name '%s'", st->id, st->name, rd->id, rd->name);
-        RRDDIMVAR *t;
-        for (t = rd->variables; t && t->next != rs; t = t->next) ;
-        if(!t) error("RRDDIMVAR '%s' not found in dimension '%s/%s' variables linked list", rs->key_name, st->id, rd->id);
-        else t->next = rs->next;
-    }
-
-    freez(rs->prefix);
-    freez(rs->suffix);
-    freez(rs);
-}
-
-// ----------------------------------------------------------------------------
-// RRDSETVAR management
-// CHART VARIABLES
-
-static inline void rrdsetvar_free_variables(RRDSETVAR *rs) {
-    RRDSET *st = rs->rrdset;
-
-    // CHART
-
-    rrdvar_free(st->rrdhost, &st->variables_root_index, rs->var_local);
-    rs->var_local = NULL;
-
-    // FAMILY
-
-    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family);
-    rs->var_family = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host);
-    rs->var_host = NULL;
-
-    // HOST
-
-    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family_name);
-    rs->var_family_name = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host_name);
-    rs->var_host_name = NULL;
-
-    // KEYS
-
-    freez(rs->key_fullid);
-    rs->key_fullid = NULL;
-
-    freez(rs->key_fullname);
-    rs->key_fullname = NULL;
-}
-
-static inline void rrdsetvar_create_variables(RRDSETVAR *rs) {
-    rrdsetvar_free_variables(rs);
-
-    RRDSET *st = rs->rrdset;
-
-    // KEYS
-
-    char buffer[RRDVAR_MAX_LENGTH + 1];
-    snprintfz(buffer, RRDVAR_MAX_LENGTH, "%s.%s", st->id, rs->variable);
-    rs->key_fullid = strdupz(buffer);
-
-    snprintfz(buffer, RRDVAR_MAX_LENGTH, "%s.%s", st->name, rs->variable);
-    rs->key_fullname = strdupz(buffer);
-
-    // CHART
-
-    rs->var_local       = rrdvar_create_and_index("local",  &st->variables_root_index,               rs->variable, rs->type, rs->value);
-
-    // FAMILY
-
-    rs->var_family      = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index,    rs->key_fullid,   rs->type, rs->value);
-    rs->var_family_name = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index,    rs->key_fullname, rs->type, rs->value);
-
-    // HOST
-
-    rs->var_host        = rrdvar_create_and_index("host",   &st->rrdhost->variables_root_index,      rs->key_fullid,   rs->type, rs->value);
-    rs->var_host_name   = rrdvar_create_and_index("host",   &st->rrdhost->variables_root_index,      rs->key_fullname, rs->type, rs->value);
-
-}
-
-RRDSETVAR *rrdsetvar_create(RRDSET *st, const char *variable, int type, void *value, uint32_t options) {
-    debug(D_VARIABLES, "RRDVARSET create for chart id '%s' name '%s' with variable name '%s'", st->id, st->name, variable);
-    RRDSETVAR *rs = (RRDSETVAR *)callocz(1, sizeof(RRDSETVAR));
-
-    rs->variable = strdupz(variable);
-    rs->type = type;
-    rs->value = value;
-    rs->options = options;
-    rs->rrdset = st;
-
-    rs->next = st->variables;
-    st->variables = rs;
-
-    rrdsetvar_create_variables(rs);
-
-    return rs;
-}
-
-void rrdsetvar_rename_all(RRDSET *st) {
-    debug(D_VARIABLES, "RRDSETVAR rename for chart id '%s' name '%s'", st->id, st->name);
-
-    RRDSETVAR *rs, *next = st->variables;
-    while((rs = next)) {
-        next = rs->next;
-        rrdsetvar_create_variables(rs);
-    }
-
-    rrdsetcalc_link_matching(st);
-}
-
-void rrdsetvar_free(RRDSETVAR *rs) {
-    RRDSET *st = rs->rrdset;
-    debug(D_VARIABLES, "RRDSETVAR free for chart id '%s' name '%s', variable '%s'", st->id, st->name, rs->variable);
-
-    if(st->variables == rs) {
-        st->variables = rs->next;
-    }
-    else {
-        RRDSETVAR *t;
-        for (t = st->variables; t && t->next != rs; t = t->next);
-        if(!t) error("RRDSETVAR '%s' not found in chart '%s' variables linked list", rs->key_fullname, st->id);
-        else t->next = rs->next;
-    }
-
-    rrdsetvar_free_variables(rs);
-
-    freez(rs->variable);
-    freez(rs);
-}
-
-// ----------------------------------------------------------------------------
-// RRDCALC management
-
-inline const char *rrdcalc_status2string(int status) {
-    switch(status) {
-        case RRDCALC_STATUS_REMOVED:
-            return "REMOVED";
-
-        case RRDCALC_STATUS_UNDEFINED:
-            return "UNDEFINED";
-
-        case RRDCALC_STATUS_UNINITIALIZED:
-            return "UNINITIALIZED";
-
-        case RRDCALC_STATUS_CLEAR:
-            return "CLEAR";
-
-        case RRDCALC_STATUS_RAISED:
-            return "RAISED";
-
-        case RRDCALC_STATUS_WARNING:
-            return "WARNING";
-
-        case RRDCALC_STATUS_CRITICAL:
-            return "CRITICAL";
-
-        default:
-            error("Unknown alarm status %d", status);
-            return "UNKNOWN";
-    }
-}
-
-static void rrdsetcalc_link(RRDSET *st, RRDCALC *rc) {
-    debug(D_HEALTH, "Health linking alarm '%s.%s' to chart '%s' of host '%s'", rc->chart?rc->chart:"NOCHART", rc->name, st->id, st->rrdhost->hostname);
-
-    rc->last_status_change = now_realtime_sec();
-    rc->rrdset = st;
-
-    rc->rrdset_next = st->alarms;
-    rc->rrdset_prev = NULL;
-    
-    if(rc->rrdset_next)
-        rc->rrdset_next->rrdset_prev = rc;
-
-    st->alarms = rc;
-
-    if(rc->update_every < rc->rrdset->update_every) {
-        error("Health alarm '%s.%s' has update every %d, less than chart update every %d. Setting alarm update frequency to %d.", rc->rrdset->id, rc->name, rc->update_every, rc->rrdset->update_every, rc->rrdset->update_every);
-        rc->update_every = rc->rrdset->update_every;
-    }
-
-    if(!isnan(rc->green) && isnan(st->green)) {
-        debug(D_HEALTH, "Health alarm '%s.%s' green threshold set from %Lf to %Lf.", rc->rrdset->id, rc->name, rc->rrdset->green, rc->green);
-        st->green = rc->green;
-    }
-
-    if(!isnan(rc->red) && isnan(st->red)) {
-        debug(D_HEALTH, "Health alarm '%s.%s' red threshold set from %Lf to %Lf.", rc->rrdset->id, rc->name, rc->rrdset->red, rc->red);
-        st->red = rc->red;
-    }
-
-    rc->local  = rrdvar_create_and_index("local",  &st->variables_root_index, rc->name, RRDVAR_TYPE_CALCULATED, &rc->value);
-    rc->family = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rc->name, RRDVAR_TYPE_CALCULATED, &rc->value);
-
-    char fullname[RRDVAR_MAX_LENGTH + 1];
-    snprintfz(fullname, RRDVAR_MAX_LENGTH, "%s.%s", st->id, rc->name);
-    rc->hostid   = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, fullname, RRDVAR_TYPE_CALCULATED, &rc->value);
-
-    snprintfz(fullname, RRDVAR_MAX_LENGTH, "%s.%s", st->name, rc->name);
-    rc->hostname = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, fullname, RRDVAR_TYPE_CALCULATED, &rc->value);
-
-	if(!rc->units) rc->units = strdupz(st->units);
-
-    {
-        time_t now = now_realtime_sec();
-        health_alarm_log(st->rrdhost, rc->id, rc->next_event_id++, now, rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->status, RRDCALC_STATUS_UNINITIALIZED, rc->source, rc->units, rc->info, 0);
-    }
-}
-
-static inline int rrdcalc_is_matching_this_rrdset(RRDCALC *rc, RRDSET *st) {
-    if(     (rc->hash_chart == st->hash      && !strcmp(rc->chart, st->id)) ||
-            (rc->hash_chart == st->hash_name && !strcmp(rc->chart, st->name)))
-        return 1;
-
-    return 0;
-}
-
-// this has to be called while the RRDHOST is locked
-inline void rrdsetcalc_link_matching(RRDSET *st) {
-    // debug(D_HEALTH, "find matching alarms for chart '%s'", st->id);
-
-    RRDCALC *rc;
-    for(rc = st->rrdhost->alarms; rc ; rc = rc->next) {
-        if(unlikely(rc->rrdset))
-            continue;
-
-        if(unlikely(rrdcalc_is_matching_this_rrdset(rc, st)))
-            rrdsetcalc_link(st, rc);
-    }
-}
-
-// this has to be called while the RRDHOST is locked
-inline void rrdsetcalc_unlink(RRDCALC *rc) {
-    RRDSET *st = rc->rrdset;
-
-    if(!st) {
-        debug(D_HEALTH, "Requested to unlink RRDCALC '%s.%s' which is not linked to any RRDSET", rc->chart?rc->chart:"NOCHART", rc->name);
-        error("Requested to unlink RRDCALC '%s.%s' which is not linked to any RRDSET", rc->chart?rc->chart:"NOCHART", rc->name);
-        return;
-    }
-
-    {
-        time_t now = now_realtime_sec();
-        health_alarm_log(st->rrdhost, rc->id, rc->next_event_id++, now, rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->status, RRDCALC_STATUS_REMOVED, rc->source, rc->units, rc->info, 0);
-    }
-
-    RRDHOST *host = st->rrdhost;
-
-    debug(D_HEALTH, "Health unlinking alarm '%s.%s' from chart '%s' of host '%s'", rc->chart?rc->chart:"NOCHART", rc->name, st->id, host->hostname);
-
-    // unlink it
-    if(rc->rrdset_prev)
-        rc->rrdset_prev->rrdset_next = rc->rrdset_next;
-
-    if(rc->rrdset_next)
-        rc->rrdset_next->rrdset_prev = rc->rrdset_prev;
-
-    if(st->alarms == rc)
-        st->alarms = rc->rrdset_next;
-
-    rc->rrdset_prev = rc->rrdset_next = NULL;
-
-    rrdvar_free(st->rrdhost, &st->variables_root_index, rc->local);
-    rc->local = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rc->family);
-    rc->family = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rc->hostid);
-    rc->hostid = NULL;
-
-    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rc->hostname);
-    rc->hostname = NULL;
-
-    rc->rrdset = NULL;
-
-    // RRDCALC will remain in RRDHOST
-    // so that if the matching chart is found in the future
-    // it will be applied automatically
-}
-
-RRDCALC *rrdcalc_find(RRDSET *st, const char *name) {
-    RRDCALC *rc;
-    uint32_t hash = simple_hash(name);
-
-    for( rc = st->alarms; rc ; rc = rc->rrdset_next ) {
-        if(unlikely(rc->hash == hash && !strcmp(rc->name, name)))
-            return rc;
-    }
-
-    return NULL;
-}
-
-static inline int rrdcalc_exists(RRDHOST *host, const char *chart, const char *name, uint32_t hash_chart, uint32_t hash_name) {
-    RRDCALC *rc;
-
-    if(unlikely(!chart)) {
-        error("attempt to find RRDCALC '%s' without giving a chart name", name);
-        return 1;
-    }
-
-    if(unlikely(!hash_chart)) hash_chart = simple_hash(chart);
-    if(unlikely(!hash_name))  hash_name  = simple_hash(name);
-
-    // make sure it does not already exist
-    for(rc = host->alarms; rc ; rc = rc->next) {
-        if (unlikely(rc->chart && rc->hash == hash_name && rc->hash_chart == hash_chart && !strcmp(name, rc->name) && !strcmp(chart, rc->chart))) {
-            debug(D_HEALTH, "Health alarm '%s.%s' already exists in host '%s'.", chart, name, host->hostname);
-            error("Health alarm '%s.%s' already exists in host '%s'.", chart, name, host->hostname);
-            return 1;
-        }
-    }
-
-    return 0;
-}
-
-static inline uint32_t rrdcalc_get_unique_id(RRDHOST *host, const char *chart, const char *name, uint32_t *next_event_id) {
-    if(chart && name) {
-        uint32_t hash_chart = simple_hash(chart);
-        uint32_t hash_name = simple_hash(name);
-
-        // re-use old IDs, by looking them up in the alarm log
-        ALARM_ENTRY *ae;
-        for(ae = host->health_log.alarms; ae ;ae = ae->next) {
-            if(unlikely(ae->hash_name == hash_name && ae->hash_chart == hash_chart && !strcmp(name, ae->name) && !strcmp(chart, ae->chart))) {
-                if(next_event_id) *next_event_id = ae->alarm_event_id + 1;
-                return ae->alarm_id;
-            }
-        }
-    }
-
-    return host->health_log.next_alarm_id++;
-}
-
-static inline void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc) {
-    rrdhost_check_rdlock(host);
-
-    if(rc->calculation) {
-        rc->calculation->status = &rc->status;
-        rc->calculation->this = &rc->value;
-        rc->calculation->after = &rc->db_after;
-        rc->calculation->before = &rc->db_before;
-        rc->calculation->rrdcalc = rc;
-    }
-
-    if(rc->warning) {
-        rc->warning->status = &rc->status;
-        rc->warning->this = &rc->value;
-        rc->warning->after = &rc->db_after;
-        rc->warning->before = &rc->db_before;
-        rc->warning->rrdcalc = rc;
-    }
-
-    if(rc->critical) {
-        rc->critical->status = &rc->status;
-        rc->critical->this = &rc->value;
-        rc->critical->after = &rc->db_after;
-        rc->critical->before = &rc->db_before;
-        rc->critical->rrdcalc = rc;
-    }
-
-    // link it to the host
-    if(likely(host->alarms)) {
-        // append it
-        RRDCALC *t;
-        for(t = host->alarms; t && t->next ; t = t->next) ;
-        t->next = rc;
-    }
-    else {
-        host->alarms = rc;
-    }
-
-    // link it to its chart
-    RRDSET *st;
-    for(st = host->rrdset_root; st ; st = st->next) {
-        if(rrdcalc_is_matching_this_rrdset(rc, st)) {
-            rrdsetcalc_link(st, rc);
-            break;
-        }
-    }
-}
-
-static inline RRDCALC *rrdcalc_create(RRDHOST *host, RRDCALCTEMPLATE *rt, const char *chart) {
-
-    debug(D_HEALTH, "Health creating dynamic alarm (from template) '%s.%s'", chart, rt->name);
-
-    if(rrdcalc_exists(host, chart, rt->name, 0, 0))
-        return NULL;
-
-    RRDCALC *rc = callocz(1, sizeof(RRDCALC));
-    rc->next_event_id = 1;
-    rc->id = rrdcalc_get_unique_id(host, chart, rt->name, &rc->next_event_id);
-    rc->name = strdupz(rt->name);
-    rc->hash = simple_hash(rc->name);
-    rc->chart = strdupz(chart);
-    rc->hash_chart = simple_hash(rc->chart);
-
-    if(rt->dimensions) rc->dimensions = strdupz(rt->dimensions);
-
-    rc->green = rt->green;
-    rc->red = rt->red;
-    rc->value = NAN;
-    rc->old_value = NAN;
-
-    rc->delay_up_duration = rt->delay_up_duration;
-    rc->delay_down_duration = rt->delay_down_duration;
-    rc->delay_max_duration = rt->delay_max_duration;
-    rc->delay_multiplier = rt->delay_multiplier;
-
-    rc->group = rt->group;
-    rc->after = rt->after;
-    rc->before = rt->before;
-    rc->update_every = rt->update_every;
-    rc->options = rt->options;
-
-    if(rt->exec) rc->exec = strdupz(rt->exec);
-    if(rt->recipient) rc->recipient = strdupz(rt->recipient);
-    if(rt->source) rc->source = strdupz(rt->source);
-    if(rt->units) rc->units = strdupz(rt->units);
-    if(rt->info) rc->info = strdupz(rt->info);
-
-    if(rt->calculation) {
-        rc->calculation = expression_parse(rt->calculation->source, NULL, NULL);
-        if(!rc->calculation)
-            error("Health alarm '%s.%s': failed to parse calculation expression '%s'", chart, rt->name, rt->calculation->source);
-    }
-    if(rt->warning) {
-        rc->warning = expression_parse(rt->warning->source, NULL, NULL);
-        if(!rc->warning)
-            error("Health alarm '%s.%s': failed to re-parse warning expression '%s'", chart, rt->name, rt->warning->source);
-    }
-    if(rt->critical) {
-        rc->critical = expression_parse(rt->critical->source, NULL, NULL);
-        if(!rc->critical)
-            error("Health alarm '%s.%s': failed to re-parse critical expression '%s'", chart, rt->name, rt->critical->source);
-    }
-
-    debug(D_HEALTH, "Health runtime added alarm '%s.%s': exec '%s', recipient '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
-          (rc->chart)?rc->chart:"NOCHART",
-          rc->name,
-          (rc->exec)?rc->exec:"DEFAULT",
-          (rc->recipient)?rc->recipient:"DEFAULT",
-          rc->green,
-          rc->red,
-          rc->group,
-          rc->after,
-          rc->before,
-          rc->options,
-          (rc->dimensions)?rc->dimensions:"NONE",
-          rc->update_every,
-          (rc->calculation)?rc->calculation->parsed_as:"NONE",
-          (rc->warning)?rc->warning->parsed_as:"NONE",
-          (rc->critical)?rc->critical->parsed_as:"NONE",
-          rc->source,
-          rc->delay_up_duration,
-          rc->delay_down_duration,
-          rc->delay_max_duration,
-          rc->delay_multiplier
-    );
-
-    rrdcalc_create_part2(host, rc);
-    return rc;
-}
-
-void rrdcalc_free(RRDHOST *host, RRDCALC *rc) {
-    if(!rc) return;
-
-    debug(D_HEALTH, "Health removing alarm '%s.%s' of host '%s'", rc->chart?rc->chart:"NOCHART", rc->name, host->hostname);
-
-    // unlink it from RRDSET
-    if(rc->rrdset) rrdsetcalc_unlink(rc);
-
-    // unlink it from RRDHOST
-    if(unlikely(rc == host->alarms))
-        host->alarms = rc->next;
-
-    else if(likely(host->alarms)) {
-        RRDCALC *t, *last = host->alarms;
-        for(t = last->next; t && t != rc; last = t, t = t->next) ;
-        if(last->next == rc)
-            last->next = rc->next;
-        else
-            error("Cannot unlink alarm '%s.%s' from host '%s': not found", rc->chart?rc->chart:"NOCHART", rc->name, host->hostname);
-    }
-    else
-        error("Cannot unlink unlink '%s.%s' from host '%s': This host does not have any calculations", rc->chart?rc->chart:"NOCHART", rc->name, host->hostname);
-
-    expression_free(rc->calculation);
-    expression_free(rc->warning);
-    expression_free(rc->critical);
-
-    freez(rc->name);
-    freez(rc->chart);
-    freez(rc->family);
-    freez(rc->dimensions);
-    freez(rc->exec);
-    freez(rc->recipient);
-    freez(rc->source);
-    freez(rc->units);
-    freez(rc->info);
-    freez(rc);
-}
+int default_health_enabled = 1;
 
 // ----------------------------------------------------------------------------
-// RRDCALCTEMPLATE management
-
-void rrdcalctemplate_link_matching(RRDSET *st) {
-    RRDCALCTEMPLATE *rt;
-
-    for(rt = st->rrdhost->templates; rt ; rt = rt->next) {
-        if(rt->hash_context == st->hash_context && !strcmp(rt->context, st->context)
-                && (!rt->family_pattern || simple_pattern_matches(rt->family_pattern, st->family))) {
-            RRDCALC *rc = rrdcalc_create(st->rrdhost, rt, st->id);
-            if(unlikely(!rc))
-                error("Health tried to create alarm from template '%s', but it failed", rt->name);
-
-#ifdef NETDATA_INTERNAL_CHECKS
-            else if(rc->rrdset != st)
-                error("Health alarm '%s.%s' should be linked to chart '%s', but it is not", rc->chart?rc->chart:"NOCHART", rc->name, st->id);
-#endif
-        }
-    }
-}
-
-static inline void rrdcalctemplate_free(RRDHOST *host, RRDCALCTEMPLATE *rt) {
-    debug(D_HEALTH, "Health removing template '%s' of host '%s'", rt->name, host->hostname);
-
-    if(host->templates) {
-        if(host->templates == rt) {
-            host->templates = rt->next;
-        }
-        else {
-            RRDCALCTEMPLATE *t, *last = host->templates;
-            for (t = last->next; t && t != rt; last = t, t = t->next ) ;
-            if(last && last->next == rt) {
-                last->next = rt->next;
-                rt->next = NULL;
-            }
-            else
-                error("Cannot find RRDCALCTEMPLATE '%s' linked in host '%s'", rt->name, host->hostname);
-        }
-    }
-
-    expression_free(rt->calculation);
-    expression_free(rt->warning);
-    expression_free(rt->critical);
-
-    freez(rt->family_match);
-    simple_pattern_free(rt->family_pattern);
-
-    freez(rt->name);
-    freez(rt->exec);
-    freez(rt->recipient);
-    freez(rt->context);
-    freez(rt->source);
-    freez(rt->units);
-    freez(rt->info);
-    freez(rt->dimensions);
-    freez(rt);
-}
-
-// ----------------------------------------------------------------------------
-// load health configuration
-
-#define HEALTH_CONF_MAX_LINE 4096
-
-#define HEALTH_ALARM_KEY "alarm"
-#define HEALTH_TEMPLATE_KEY "template"
-#define HEALTH_ON_KEY "on"
-#define HEALTH_FAMILIES_KEY "families"
-#define HEALTH_LOOKUP_KEY "lookup"
-#define HEALTH_CALC_KEY "calc"
-#define HEALTH_EVERY_KEY "every"
-#define HEALTH_GREEN_KEY "green"
-#define HEALTH_RED_KEY "red"
-#define HEALTH_WARN_KEY "warn"
-#define HEALTH_CRIT_KEY "crit"
-#define HEALTH_EXEC_KEY "exec"
-#define HEALTH_RECIPIENT_KEY "to"
-#define HEALTH_UNITS_KEY "units"
-#define HEALTH_INFO_KEY "info"
-#define HEALTH_DELAY_KEY "delay"
-
-static inline int rrdcalc_add_alarm_from_config(RRDHOST *host, RRDCALC *rc) {
-    if(!rc->chart) {
-        error("Health configuration for alarm '%s' does not have a chart", rc->name);
-        return 0;
-    }
+// health initialization
 
-    if(!rc->update_every) {
-        error("Health configuration for alarm '%s.%s' has no frequency (parameter 'every'). Ignoring it.", rc->chart?rc->chart:"NOCHART", rc->name);
-        return 0;
-    }
-
-    if(!RRDCALC_HAS_DB_LOOKUP(rc) && !rc->warning && !rc->critical) {
-        error("Health configuration for alarm '%s.%s' is useless (no calculation, no warning and no critical evaluation)", rc->chart?rc->chart:"NOCHART", rc->name);
-        return 0;
-    }
-
-    if (rrdcalc_exists(host, rc->chart, rc->name, rc->hash_chart, rc->hash))
-        return 0;
-
-    rc->id = rrdcalc_get_unique_id(&localhost, rc->chart, rc->name, &rc->next_event_id);
-
-    debug(D_HEALTH, "Health configuration adding alarm '%s.%s' (%u): exec '%s', recipient '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
-          rc->chart?rc->chart:"NOCHART",
-          rc->name,
-          rc->id,
-          (rc->exec)?rc->exec:"DEFAULT",
-          (rc->recipient)?rc->recipient:"DEFAULT",
-          rc->green,
-          rc->red,
-          rc->group,
-          rc->after,
-          rc->before,
-          rc->options,
-          (rc->dimensions)?rc->dimensions:"NONE",
-          rc->update_every,
-          (rc->calculation)?rc->calculation->parsed_as:"NONE",
-          (rc->warning)?rc->warning->parsed_as:"NONE",
-          (rc->critical)?rc->critical->parsed_as:"NONE",
-          rc->source,
-          rc->delay_up_duration,
-          rc->delay_down_duration,
-          rc->delay_max_duration,
-          rc->delay_multiplier
-    );
-
-    rrdcalc_create_part2(host, rc);
-    return 1;
-}
-
-static inline int rrdcalctemplate_add_template_from_config(RRDHOST *host, RRDCALCTEMPLATE *rt) {
-    if(unlikely(!rt->context)) {
-        error("Health configuration for template '%s' does not have a context", rt->name);
-        return 0;
-    }
-
-    if(unlikely(!rt->update_every)) {
-        error("Health configuration for template '%s' has no frequency (parameter 'every'). Ignoring it.", rt->name);
-        return 0;
-    }
-
-    if(unlikely(!RRDCALCTEMPLATE_HAS_CALCULATION(rt) && !rt->warning && !rt->critical)) {
-        error("Health configuration for template '%s' is useless (no calculation, no warning and no critical evaluation)", rt->name);
-        return 0;
-    }
-
-    RRDCALCTEMPLATE *t, *last = NULL;
-    for (t = host->templates; t ; last = t, t = t->next) {
-        if(unlikely(t->hash_name == rt->hash_name && !strcmp(t->name, rt->name))) {
-            error("Health configuration template '%s' already exists for host '%s'.", rt->name, host->hostname);
-            return 0;
-        }
-    }
-
-    debug(D_HEALTH, "Health configuration adding template '%s': context '%s', exec '%s', recipient '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
-          rt->name,
-          (rt->context)?rt->context:"NONE",
-          (rt->exec)?rt->exec:"DEFAULT",
-          (rt->recipient)?rt->recipient:"DEFAULT",
-          rt->green,
-          rt->red,
-          rt->group,
-          rt->after,
-          rt->before,
-          rt->options,
-          (rt->dimensions)?rt->dimensions:"NONE",
-          rt->update_every,
-          (rt->calculation)?rt->calculation->parsed_as:"NONE",
-          (rt->warning)?rt->warning->parsed_as:"NONE",
-          (rt->critical)?rt->critical->parsed_as:"NONE",
-          rt->source,
-          rt->delay_up_duration,
-          rt->delay_down_duration,
-          rt->delay_max_duration,
-          rt->delay_multiplier
-    );
-
-    if(likely(last)) {
-        last->next = rt;
-    }
-    else {
-        rt->next = host->templates;
-        host->templates = rt;
-    }
-
-    return 1;
-}
-
-static inline int health_parse_duration(char *string, int *result) {
-    // make sure it is a number
-    if(!*string || !(isdigit(*string) || *string == '+' || *string == '-')) {
-        *result = 0;
-        return 0;
-    }
-
-    char *e = NULL;
-    calculated_number n = strtold(string, &e);
-    if(e && *e) {
-        switch (*e) {
-            case 'Y':
-                *result = (int) (n * 86400 * 365);
-                break;
-            case 'M':
-                *result = (int) (n * 86400 * 30);
-                break;
-            case 'w':
-                *result = (int) (n * 86400 * 7);
-                break;
-            case 'd':
-                *result = (int) (n * 86400);
-                break;
-            case 'h':
-                *result = (int) (n * 3600);
-                break;
-            case 'm':
-                *result = (int) (n * 60);
-                break;
-
-            default:
-            case 's':
-                *result = (int) (n);
-                break;
-        }
-    }
-    else
-       *result = (int)(n);
-
-    return 1;
-}
-
-static inline int health_parse_delay(
-        size_t line, const char *path, const char *file, char *string,
-        int *delay_up_duration,
-        int *delay_down_duration,
-        int *delay_max_duration,
-        float *delay_multiplier) {
-
-    char given_up = 0;
-    char given_down = 0;
-    char given_max = 0;
-    char given_multiplier = 0;
-
-    char *s = string;
-    while(*s) {
-        char *key = s;
-
-        while(*s && !isspace(*s)) s++;
-        while(*s && isspace(*s)) *s++ = '\0';
-
-        if(!*key) break;
-
-        char *value = s;
-        while(*s && !isspace(*s)) s++;
-        while(*s && isspace(*s)) *s++ = '\0';
-
-        if(!strcasecmp(key, "up")) {
-            if (!health_parse_duration(value, delay_up_duration)) {
-                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
-                      line, path, file, value, key);
-            }
-            else given_up = 1;
-        }
-        else if(!strcasecmp(key, "down")) {
-            if (!health_parse_duration(value, delay_down_duration)) {
-                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
-                      line, path, file, value, key);
-            }
-            else given_down = 1;
-        }
-        else if(!strcasecmp(key, "multiplier")) {
-            *delay_multiplier = strtof(value, NULL);
-            if(isnan(*delay_multiplier) || isinf(*delay_multiplier) || islessequal(*delay_multiplier, 0)) {
-                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
-                      line, path, file, value, key);
-            }
-            else given_multiplier = 1;
-        }
-        else if(!strcasecmp(key, "max")) {
-            if (!health_parse_duration(value, delay_max_duration)) {
-                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
-                      line, path, file, value, key);
-            }
-            else given_max = 1;
-        }
-        else {
-            error("Health configuration at line %zu of file '%s/%s': unknown keyword '%s'",
-                  line, path, file, key);
-        }
-    }
-
-    if(!given_up)
-        *delay_up_duration = 0;
-
-    if(!given_down)
-        *delay_down_duration = 0;
-
-    if(!given_multiplier)
-        *delay_multiplier = 1.0;
-
-    if(!given_max) {
-        if((*delay_max_duration) < (*delay_up_duration) * (*delay_multiplier))
-            *delay_max_duration = (*delay_up_duration) * (*delay_multiplier);
-
-        if((*delay_max_duration) < (*delay_down_duration) * (*delay_multiplier))
-            *delay_max_duration = (*delay_down_duration) * (*delay_multiplier);
-    }
-
-    return 1;
-}
-
-static inline int health_parse_db_lookup(
-        size_t line, const char *path, const char *file, char *string,
-        int *group_method, int *after, int *before, int *every,
-        uint32_t *options, char **dimensions
-) {
-    debug(D_HEALTH, "Health configuration parsing database lookup %zu@%s/%s: %s", line, path, file, string);
-
-    if(*dimensions) freez(*dimensions);
-    *dimensions = NULL;
-    *after = 0;
-    *before = 0;
-    *every = 0;
-    *options = 0;
-
-    char *s = string, *key;
-
-    // first is the group method
-    key = s;
-    while(*s && !isspace(*s)) s++;
-    while(*s && isspace(*s)) *s++ = '\0';
-    if(!*s) {
-        error("Health configuration invalid chart calculation at line %zu of file '%s/%s': expected group method followed by the 'after' time, but got '%s'",
-              line, path, file, key);
-        return 0;
-    }
-
-    if((*group_method = web_client_api_request_v1_data_group(key, -1)) == -1) {
-        error("Health configuration at line %zu of file '%s/%s': invalid group method '%s'",
-              line, path, file, key);
-        return 0;
-    }
-
-    // then is the 'after' time
-    key = s;
-    while(*s && !isspace(*s)) s++;
-    while(*s && isspace(*s)) *s++ = '\0';
-
-    if(!health_parse_duration(key, after)) {
-        error("Health configuration at line %zu of file '%s/%s': invalid duration '%s' after group method",
-              line, path, file, key);
-        return 0;
-    }
-
-    // sane defaults
-    *every = abs(*after);
-
-    // now we may have optional parameters
-    while(*s) {
-        key = s;
-        while(*s && !isspace(*s)) s++;
-        while(*s && isspace(*s)) *s++ = '\0';
-        if(!*key) break;
-
-        if(!strcasecmp(key, "at")) {
-            char *value = s;
-            while(*s && !isspace(*s)) s++;
-            while(*s && isspace(*s)) *s++ = '\0';
-
-            if (!health_parse_duration(value, before)) {
-                error("Health configuration at line %zu of file '%s/%s': invalid duration '%s' for '%s' keyword",
-                      line, path, file, value, key);
-            }
-        }
-        else if(!strcasecmp(key, HEALTH_EVERY_KEY)) {
-            char *value = s;
-            while(*s && !isspace(*s)) s++;
-            while(*s && isspace(*s)) *s++ = '\0';
-
-            if (!health_parse_duration(value, every)) {
-                error("Health configuration at line %zu of file '%s/%s': invalid duration '%s' for '%s' keyword",
-                      line, path, file, value, key);
-            }
-        }
-        else if(!strcasecmp(key, "absolute") || !strcasecmp(key, "abs") || !strcasecmp(key, "absolute_sum")) {
-            *options |= RRDR_OPTION_ABSOLUTE;
-        }
-        else if(!strcasecmp(key, "min2max")) {
-            *options |= RRDR_OPTION_MIN2MAX;
-        }
-        else if(!strcasecmp(key, "null2zero")) {
-            *options |= RRDR_OPTION_NULL2ZERO;
-        }
-        else if(!strcasecmp(key, "percentage")) {
-            *options |= RRDR_OPTION_PERCENTAGE;
-        }
-        else if(!strcasecmp(key, "unaligned")) {
-            *options |= RRDR_OPTION_NOT_ALIGNED;
-        }
-        else if(!strcasecmp(key, "of")) {
-            if(*s && strcasecmp(s, "all"))
-               *dimensions = strdupz(s);
-            break;
-        }
-        else {
-            error("Health configuration at line %zu of file '%s/%s': unknown keyword '%s'",
-                  line, path, file, key);
-        }
-    }
-
-    return 1;
-}
-
-static inline char *tabs2spaces(char *s) {
-    char *t = s;
-    while(*t) {
-        if(unlikely(*t == '\t')) *t = ' ';
-        t++;
-    }
-
-    return s;
-}
-
-static inline char *health_source_file(size_t line, const char *path, const char *filename) {
+inline char *health_config_dir(void) {
     char buffer[FILENAME_MAX + 1];
-    snprintfz(buffer, FILENAME_MAX, "%zu@%s/%s", line, path, filename);
-    return strdupz(buffer);
-}
-
-static inline void strip_quotes(char *s) {
-    while(*s) {
-        if(*s == '\'' || *s == '"') *s = ' ';
-        s++;
-    }
-}
-
-int health_readfile(const char *path, const char *filename) {
-    debug(D_HEALTH, "Health configuration reading file '%s/%s'", path, filename);
-
-    static uint32_t hash_alarm = 0, hash_template = 0, hash_on = 0, hash_families = 0, hash_calc = 0, hash_green = 0, hash_red = 0, hash_warn = 0, hash_crit = 0, hash_exec = 0, hash_every = 0, hash_lookup = 0, hash_units = 0, hash_info = 0, hash_recipient = 0, hash_delay = 0;
-    char buffer[HEALTH_CONF_MAX_LINE + 1];
-
-    if(unlikely(!hash_alarm)) {
-        hash_alarm = simple_uhash(HEALTH_ALARM_KEY);
-        hash_template = simple_uhash(HEALTH_TEMPLATE_KEY);
-        hash_on = simple_uhash(HEALTH_ON_KEY);
-        hash_families = simple_uhash(HEALTH_FAMILIES_KEY);
-        hash_calc = simple_uhash(HEALTH_CALC_KEY);
-        hash_lookup = simple_uhash(HEALTH_LOOKUP_KEY);
-        hash_green = simple_uhash(HEALTH_GREEN_KEY);
-        hash_red = simple_uhash(HEALTH_RED_KEY);
-        hash_warn = simple_uhash(HEALTH_WARN_KEY);
-        hash_crit = simple_uhash(HEALTH_CRIT_KEY);
-        hash_exec = simple_uhash(HEALTH_EXEC_KEY);
-        hash_every = simple_uhash(HEALTH_EVERY_KEY);
-        hash_units = simple_hash(HEALTH_UNITS_KEY);
-        hash_info = simple_hash(HEALTH_INFO_KEY);
-        hash_recipient = simple_hash(HEALTH_RECIPIENT_KEY);
-        hash_delay = simple_uhash(HEALTH_DELAY_KEY);
-    }
-
-    snprintfz(buffer, HEALTH_CONF_MAX_LINE, "%s/%s", path, filename);
-    FILE *fp = fopen(buffer, "r");
-    if(!fp) {
-        error("Health configuration cannot read file '%s'.", buffer);
-        return 0;
-    }
-
-    RRDCALC *rc = NULL;
-    RRDCALCTEMPLATE *rt = NULL;
-
-    size_t line = 0, append = 0;
-    char *s;
-    while((s = fgets(&buffer[append], (int)(HEALTH_CONF_MAX_LINE - append), fp)) || append) {
-        int stop_appending = !s;
-        line++;
-        s = trim(buffer);
-        if(!s) continue;
-
-        append = strlen(s);
-        if(!stop_appending && s[append - 1] == '\\') {
-            s[append - 1] = ' ';
-            append = &s[append] - buffer;
-            if(append < HEALTH_CONF_MAX_LINE)
-                continue;
-            else {
-                error("Health configuration has too long muli-line at line %zu of file '%s/%s'.", line, path, filename);
-            }
-        }
-        append = 0;
-
-        char *key = s;
-        while(*s && *s != ':') s++;
-        if(!*s) {
-            error("Health configuration has invalid line %zu of file '%s/%s'. It does not contain a ':'. Ignoring it.", line, path, filename);
-            continue;
-        }
-        *s = '\0';
-        s++;
-
-        char *value = s;
-        key = trim(key);
-        value = trim(value);
-
-        if(!key) {
-            error("Health configuration has invalid line %zu of file '%s/%s'. Keyword is empty. Ignoring it.", line, path, filename);
-            continue;
-        }
-
-        if(!value) {
-            error("Health configuration has invalid line %zu of file '%s/%s'. value is empty. Ignoring it.", line, path, filename);
-            continue;
-        }
-
-        uint32_t hash = simple_uhash(key);
-
-        if(hash == hash_alarm && !strcasecmp(key, HEALTH_ALARM_KEY)) {
-            if(rc && !rrdcalc_add_alarm_from_config(&localhost, rc))
-                rrdcalc_free(&localhost, rc);
-
-            if(rt) {
-                if (!rrdcalctemplate_add_template_from_config(&localhost, rt))
-                    rrdcalctemplate_free(&localhost, rt);
-                rt = NULL;
-            }
-
-            rc = callocz(1, sizeof(RRDCALC));
-            rc->next_event_id = 1;
-            rc->name = tabs2spaces(strdupz(value));
-            rc->hash = simple_hash(rc->name);
-            rc->source = health_source_file(line, path, filename);
-            rc->green = NAN;
-            rc->red = NAN;
-            rc->value = NAN;
-            rc->old_value = NAN;
-            rc->delay_multiplier = 1.0;
-
-            if(rrdvar_fix_name(rc->name))
-                error("Health configuration renamed alarm '%s' to '%s'", value, rc->name);
-        }
-        else if(hash == hash_template && !strcasecmp(key, HEALTH_TEMPLATE_KEY)) {
-            if(rc) {
-                if(!rrdcalc_add_alarm_from_config(&localhost, rc))
-                    rrdcalc_free(&localhost, rc);
-                rc = NULL;
-            }
-
-            if(rt && !rrdcalctemplate_add_template_from_config(&localhost, rt))
-                rrdcalctemplate_free(&localhost, rt);
-
-            rt = callocz(1, sizeof(RRDCALCTEMPLATE));
-            rt->name = tabs2spaces(strdupz(value));
-            rt->hash_name = simple_hash(rt->name);
-            rt->source = health_source_file(line, path, filename);
-            rt->green = NAN;
-            rt->red = NAN;
-            rt->delay_multiplier = 1.0;
-
-            if(rrdvar_fix_name(rt->name))
-                error("Health configuration renamed template '%s' to '%s'", value, rt->name);
-        }
-        else if(rc) {
-            if(hash == hash_on && !strcasecmp(key, HEALTH_ON_KEY)) {
-                if(rc->chart) {
-                    if(strcmp(rc->chart, value))
-                        error("Health configuration at line %zu of file '%s/%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                                line, path, filename, rc->name, key, rc->chart, value, value);
-
-                    freez(rc->chart);
-                }
-                rc->chart = tabs2spaces(strdupz(value));
-                rc->hash_chart = simple_hash(rc->chart);
-            }
-            else if(hash == hash_lookup && !strcasecmp(key, HEALTH_LOOKUP_KEY)) {
-                health_parse_db_lookup(line, path, filename, value, &rc->group, &rc->after, &rc->before,
-                                       &rc->update_every,
-                                       &rc->options, &rc->dimensions);
-            }
-            else if(hash == hash_every && !strcasecmp(key, HEALTH_EVERY_KEY)) {
-                if(!health_parse_duration(value, &rc->update_every))
-                    error("Health configuration at line %zu of file '%s/%s' for alarm '%s' at key '%s' cannot parse duration: '%s'.",
-                         line, path, filename, rc->name, key, value);
-            }
-            else if(hash == hash_green && !strcasecmp(key, HEALTH_GREEN_KEY)) {
-                char *e;
-                rc->green = strtold(value, &e);
-                if(e && *e) {
-                    error("Health configuration at line %zu of file '%s/%s' for alarm '%s' at key '%s' leaves this string unmatched: '%s'.",
-                         line, path, filename, rc->name, key, e);
-                }
-            }
-            else if(hash == hash_red && !strcasecmp(key, HEALTH_RED_KEY)) {
-                char *e;
-                rc->red = strtold(value, &e);
-                if(e && *e) {
-                    error("Health configuration at line %zu of file '%s/%s' for alarm '%s' at key '%s' leaves this string unmatched: '%s'.",
-                         line, path, filename, rc->name, key, e);
-                }
-            }
-            else if(hash == hash_calc && !strcasecmp(key, HEALTH_CALC_KEY)) {
-                const char *failed_at = NULL;
-                int error = 0;
-                rc->calculation = expression_parse(value, &failed_at, &error);
-                if(!rc->calculation) {
-                    error("Health configuration at line %zu of file '%s/%s' for alarm '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
-                          line, path, filename, rc->name, key, value, expression_strerror(error), failed_at);
-                }
-            }
-            else if(hash == hash_warn && !strcasecmp(key, HEALTH_WARN_KEY)) {
-                const char *failed_at = NULL;
-                int error = 0;
-                rc->warning = expression_parse(value, &failed_at, &error);
-                if(!rc->warning) {
-                    error("Health configuration at line %zu of file '%s/%s' for alarm '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
-                          line, path, filename, rc->name, key, value, expression_strerror(error), failed_at);
-                }
-            }
-            else if(hash == hash_crit && !strcasecmp(key, HEALTH_CRIT_KEY)) {
-                const char *failed_at = NULL;
-                int error = 0;
-                rc->critical = expression_parse(value, &failed_at, &error);
-                if(!rc->critical) {
-                    error("Health configuration at line %zu of file '%s/%s' for alarm '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
-                          line, path, filename, rc->name, key, value, expression_strerror(error), failed_at);
-                }
-            }
-            else if(hash == hash_exec && !strcasecmp(key, HEALTH_EXEC_KEY)) {
-                if(rc->exec) {
-                    if(strcmp(rc->exec, value))
-                        error("Health configuration at line %zu of file '%s/%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rc->name, key, rc->exec, value, value);
-
-                    freez(rc->exec);
-                }
-                rc->exec = tabs2spaces(strdupz(value));
-            }
-            else if(hash == hash_recipient && !strcasecmp(key, HEALTH_RECIPIENT_KEY)) {
-                if(rc->recipient) {
-                    if(strcmp(rc->recipient, value))
-                        error("Health configuration at line %zu of file '%s/%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rc->name, key, rc->recipient, value, value);
-
-                    freez(rc->recipient);
-                }
-                rc->recipient = tabs2spaces(strdupz(value));
-            }
-            else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
-                if(rc->units) {
-                    if(strcmp(rc->units, value))
-                        error("Health configuration at line %zu of file '%s/%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rc->name, key, rc->units, value, value);
-
-                    freez(rc->units);
-                }
-                rc->units = tabs2spaces(strdupz(value));
-                strip_quotes(rc->units);
-            }
-            else if(hash == hash_info && !strcasecmp(key, HEALTH_INFO_KEY)) {
-                if(rc->info) {
-                    if(strcmp(rc->info, value))
-                        error("Health configuration at line %zu of file '%s/%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rc->name, key, rc->info, value, value);
-
-                    freez(rc->info);
-                }
-                rc->info = tabs2spaces(strdupz(value));
-                strip_quotes(rc->info);
-            }
-            else if(hash == hash_delay && !strcasecmp(key, HEALTH_DELAY_KEY)) {
-                health_parse_delay(line, path, filename, value, &rc->delay_up_duration, &rc->delay_down_duration, &rc->delay_max_duration, &rc->delay_multiplier);
-            }
-            else {
-                error("Health configuration at line %zu of file '%s/%s' for alarm '%s' has unknown key '%s'.",
-                     line, path, filename, rc->name, key);
-            }
-        }
-        else if(rt) {
-            if(hash == hash_on && !strcasecmp(key, HEALTH_ON_KEY)) {
-                if(rt->context) {
-                    if(strcmp(rt->context, value))
-                        error("Health configuration at line %zu of file '%s/%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                                line, path, filename, rt->name, key, rt->context, value, value);
-
-                    freez(rt->context);
-                }
-                rt->context = tabs2spaces(strdupz(value));
-                rt->hash_context = simple_hash(rt->context);
-            }
-            else if(hash == hash_families && !strcasecmp(key, HEALTH_FAMILIES_KEY)) {
-                freez(rt->family_match);
-                simple_pattern_free(rt->family_pattern);
-
-                rt->family_match = tabs2spaces(strdupz(value));
-                rt->family_pattern = simple_pattern_create(rt->family_match, SIMPLE_PATTERN_EXACT);
-            }
-            else if(hash == hash_lookup && !strcasecmp(key, HEALTH_LOOKUP_KEY)) {
-                health_parse_db_lookup(line, path, filename, value, &rt->group, &rt->after, &rt->before,
-                                       &rt->update_every, &rt->options, &rt->dimensions);
-            }
-            else if(hash == hash_every && !strcasecmp(key, HEALTH_EVERY_KEY)) {
-                if(!health_parse_duration(value, &rt->update_every))
-                    error("Health configuration at line %zu of file '%s/%s' for template '%s' at key '%s' cannot parse duration: '%s'.",
-                         line, path, filename, rt->name, key, value);
-            }
-            else if(hash == hash_green && !strcasecmp(key, HEALTH_GREEN_KEY)) {
-                char *e;
-                rt->green = strtold(value, &e);
-                if(e && *e) {
-                    error("Health configuration at line %zu of file '%s/%s' for template '%s' at key '%s' leaves this string unmatched: '%s'.",
-                         line, path, filename, rt->name, key, e);
-                }
-            }
-            else if(hash == hash_red && !strcasecmp(key, HEALTH_RED_KEY)) {
-                char *e;
-                rt->red = strtold(value, &e);
-                if(e && *e) {
-                    error("Health configuration at line %zu of file '%s/%s' for template '%s' at key '%s' leaves this string unmatched: '%s'.",
-                         line, path, filename, rt->name, key, e);
-                }
-            }
-            else if(hash == hash_calc && !strcasecmp(key, HEALTH_CALC_KEY)) {
-                const char *failed_at = NULL;
-                int error = 0;
-                rt->calculation = expression_parse(value, &failed_at, &error);
-                if(!rt->calculation) {
-                    error("Health configuration at line %zu of file '%s/%s' for template '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
-                          line, path, filename, rt->name, key, value, expression_strerror(error), failed_at);
-                }
-            }
-            else if(hash == hash_warn && !strcasecmp(key, HEALTH_WARN_KEY)) {
-                const char *failed_at = NULL;
-                int error = 0;
-                rt->warning = expression_parse(value, &failed_at, &error);
-                if(!rt->warning) {
-                    error("Health configuration at line %zu of file '%s/%s' for template '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
-                          line, path, filename, rt->name, key, value, expression_strerror(error), failed_at);
-                }
-            }
-            else if(hash == hash_crit && !strcasecmp(key, HEALTH_CRIT_KEY)) {
-                const char *failed_at = NULL;
-                int error = 0;
-                rt->critical = expression_parse(value, &failed_at, &error);
-                if(!rt->critical) {
-                    error("Health configuration at line %zu of file '%s/%s' for template '%s' at key '%s' has unparse-able expression '%s': %s at '%s'",
-                          line, path, filename, rt->name, key, value, expression_strerror(error), failed_at);
-                }
-            }
-            else if(hash == hash_exec && !strcasecmp(key, HEALTH_EXEC_KEY)) {
-                if(rt->exec) {
-                    if(strcmp(rt->exec, value))
-                        error("Health configuration at line %zu of file '%s/%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rt->name, key, rt->exec, value, value);
-
-                    freez(rt->exec);
-                }
-                rt->exec = tabs2spaces(strdupz(value));
-            }
-            else if(hash == hash_recipient && !strcasecmp(key, HEALTH_RECIPIENT_KEY)) {
-                if(rt->recipient) {
-                    if(strcmp(rt->recipient, value))
-                        error("Health configuration at line %zu of file '%s/%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rt->name, key, rt->recipient, value, value);
-
-                    freez(rt->recipient);
-                }
-                rt->recipient = tabs2spaces(strdupz(value));
-            }
-            else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
-                if(rt->units) {
-                    if(strcmp(rt->units, value))
-                        error("Health configuration at line %zu of file '%s/%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rt->name, key, rt->units, value, value);
-
-                    freez(rt->units);
-                }
-                rt->units = tabs2spaces(strdupz(value));
-                strip_quotes(rt->units);
-            }
-            else if(hash == hash_info && !strcasecmp(key, HEALTH_INFO_KEY)) {
-                if(rt->info) {
-                    if(strcmp(rt->info, value))
-                        error("Health configuration at line %zu of file '%s/%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
-                             line, path, filename, rt->name, key, rt->info, value, value);
-
-                    freez(rt->info);
-                }
-                rt->info = tabs2spaces(strdupz(value));
-                strip_quotes(rt->info);
-            }
-            else if(hash == hash_delay && !strcasecmp(key, HEALTH_DELAY_KEY)) {
-                health_parse_delay(line, path, filename, value, &rt->delay_up_duration, &rt->delay_down_duration, &rt->delay_max_duration, &rt->delay_multiplier);
-            }
-            else {
-                error("Health configuration at line %zu of file '%s/%s' for template '%s' has unknown key '%s'.",
-                      line, path, filename, rt->name, key);
-            }
-        }
-        else {
-            error("Health configuration at line %zu of file '%s/%s' has unknown key '%s'. Expected either '" HEALTH_ALARM_KEY "' or '" HEALTH_TEMPLATE_KEY "'.",
-                  line, path, filename, key);
-        }
-    }
-
-    if(rc && !rrdcalc_add_alarm_from_config(&localhost, rc))
-        rrdcalc_free(&localhost, rc);
-
-    if(rt && !rrdcalctemplate_add_template_from_config(&localhost, rt))
-        rrdcalctemplate_free(&localhost, rt);
-
-    fclose(fp);
-    return 1;
-}
-
-void health_readdir(const char *path) {
-    size_t pathlen = strlen(path);
-
-    debug(D_HEALTH, "Health configuration reading directory '%s'", path);
-
-    DIR *dir = opendir(path);
-    if (!dir) {
-        error("Health configuration cannot open directory '%s'.", path);
-        return;
-    }
-
-    struct dirent *de = NULL;
-    while ((de = readdir(dir))) {
-        size_t len = strlen(de->d_name);
-
-        if(de->d_type == DT_DIR
-           && (
-                   (de->d_name[0] == '.' && de->d_name[1] == '\0')
-                   || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
-           )) {
-            debug(D_HEALTH, "Ignoring directory '%s'", de->d_name);
-            continue;
-        }
-
-        else if(de->d_type == DT_DIR) {
-            char *s = mallocz(pathlen + strlen(de->d_name) + 2);
-            strcpy(s, path);
-            strcat(s, "/");
-            strcat(s, de->d_name);
-            health_readdir(s);
-            freez(s);
-            continue;
-        }
-
-        else if((de->d_type == DT_LNK || de->d_type == DT_REG || de->d_type == DT_UNKNOWN) &&
-                len > 5 && !strcmp(&de->d_name[len - 5], ".conf")) {
-            health_readfile(path, de->d_name);
-        }
-
-        else debug(D_HEALTH, "Ignoring file '%s'", de->d_name);
-    }
-
-    closedir(dir);
-}
-
-static inline char *health_config_dir(void) {
-    char buffer[FILENAME_MAX + 1];
-    snprintfz(buffer, FILENAME_MAX, "%s/health.d", config_get("global", "config directory", CONFIG_DIR));
-    return config_get("health", "health configuration directory", buffer);
+    snprintfz(buffer, FILENAME_MAX, "%s/health.d", netdata_configured_config_dir);
+    return config_get(CONFIG_SECTION_HEALTH, "health configuration directory", buffer);
 }
 
 void health_init(void) {
     debug(D_HEALTH, "Health configuration initializing");
 
-    if(!(health_enabled = config_get_boolean("health", "enabled", 1))) {
+    if(!(default_health_enabled = config_get_boolean(CONFIG_SECTION_HEALTH, "enabled", 1))) {
         debug(D_HEALTH, "Health is disabled.");
         return;
     }
-
-    char *pathname = config_get("health", "health db directory", VARLIB_DIR "/health");
-    if(mkdir(pathname, 0770) == -1 && errno != EEXIST)
-        fatal("Cannot create directory '%s'.", pathname);
-
-    char filename[FILENAME_MAX + 1];
-    snprintfz(filename, FILENAME_MAX, "%s/health-log.db", pathname);
-    health.log_filename = config_get("health", "health db file", filename);
-
-    health_alarm_log_load(&localhost);
-    health_alarm_log_open();
-
-    char *path = health_config_dir();
-
-    {
-        char buffer[FILENAME_MAX + 1];
-        snprintfz(buffer, FILENAME_MAX, "%s/alarm-notify.sh", config_get("global", "plugins directory", PLUGINS_DIR));
-        health.health_default_exec = config_get("health", "script to execute on alarm", buffer);
-    }
-
-    long n = config_get_number("health", "in memory max health log entries", (long)localhost.health_log.max);
-    if(n < 10) {
-        error("Health configuration has invalid max log entries %ld. Using default %u", n, localhost.health_log.max);
-        config_set_number("health", "in memory max health log entries", (long)localhost.health_log.max);
-    }
-    else localhost.health_log.max = (unsigned int)n;
-
-    rrdhost_rwlock(&localhost);
-    health_readdir(path);
-    rrdhost_unlock(&localhost);
 }
 
 // ----------------------------------------------------------------------------
-// JSON generation
-
-static inline void health_string2json(BUFFER *wb, const char *prefix, const char *label, const char *value, const char *suffix) {
-    if(value && *value)
-        buffer_sprintf(wb, "%s\"%s\":\"%s\"%s", prefix, label, value, suffix);
-    else
-        buffer_sprintf(wb, "%s\"%s\":null%s", prefix, label, suffix);
-}
-
-static inline void health_alarm_entry2json_nolock(BUFFER *wb, ALARM_ENTRY *ae, RRDHOST *host) {
-    buffer_sprintf(wb, "\n\t{\n"
-                           "\t\t\"hostname\": \"%s\",\n"
-                           "\t\t\"unique_id\": %u,\n"
-                           "\t\t\"alarm_id\": %u,\n"
-                           "\t\t\"alarm_event_id\": %u,\n"
-                           "\t\t\"name\": \"%s\",\n"
-                           "\t\t\"chart\": \"%s\",\n"
-                           "\t\t\"family\": \"%s\",\n"
-                           "\t\t\"processed\": %s,\n"
-                           "\t\t\"updated\": %s,\n"
-                           "\t\t\"exec_run\": %lu,\n"
-                           "\t\t\"exec_failed\": %s,\n"
-                           "\t\t\"exec\": \"%s\",\n"
-                           "\t\t\"recipient\": \"%s\",\n"
-                           "\t\t\"exec_code\": %d,\n"
-                           "\t\t\"source\": \"%s\",\n"
-                           "\t\t\"units\": \"%s\",\n"
-                           "\t\t\"info\": \"%s\",\n"
-                           "\t\t\"when\": %lu,\n"
-                           "\t\t\"duration\": %lu,\n"
-                           "\t\t\"non_clear_duration\": %lu,\n"
-                           "\t\t\"status\": \"%s\",\n"
-                           "\t\t\"old_status\": \"%s\",\n"
-                           "\t\t\"delay\": %d,\n"
-                           "\t\t\"delay_up_to_timestamp\": %lu,\n"
-                           "\t\t\"updated_by_id\": %u,\n"
-                           "\t\t\"updates_id\": %u,\n",
-                   host->hostname,
-                   ae->unique_id,
-                   ae->alarm_id,
-                   ae->alarm_event_id,
-                   ae->name,
-                   ae->chart,
-                   ae->family,
-                   (ae->flags & HEALTH_ENTRY_FLAG_PROCESSED)?"true":"false",
-                   (ae->flags & HEALTH_ENTRY_FLAG_UPDATED)?"true":"false",
-                   (unsigned long)ae->exec_run_timestamp,
-                   (ae->flags & HEALTH_ENTRY_FLAG_EXEC_FAILED)?"true":"false",
-                   ae->exec?ae->exec:health.health_default_exec,
-                   ae->recipient?ae->recipient:health.health_default_recipient,
-                   ae->exec_code,
-                   ae->source,
-                   ae->units?ae->units:"",
-                   ae->info?ae->info:"",
-                   (unsigned long)ae->when,
-                   (unsigned long)ae->duration,
-                   (unsigned long)ae->non_clear_duration,
-                   rrdcalc_status2string(ae->new_status),
-                   rrdcalc_status2string(ae->old_status),
-                   ae->delay,
-                   (unsigned long)ae->delay_up_to_timestamp,
-                   ae->updated_by_id,
-                   ae->updates_id
-    );
-
-    buffer_strcat(wb, "\t\t\"value\":");
-    buffer_rrd_value(wb, ae->new_value);
-    buffer_strcat(wb, ",\n");
-
-    buffer_strcat(wb, "\t\t\"old_value\":");
-    buffer_rrd_value(wb, ae->old_value);
-    buffer_strcat(wb, "\n");
-
-    buffer_strcat(wb, "\t}");
-}
-
-void health_alarm_log2json(RRDHOST *host, BUFFER *wb, uint32_t after) {
-    pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
-
-    buffer_strcat(wb, "[");
-
-    unsigned int max = host->health_log.max;
-    unsigned int count = 0;
-    ALARM_ENTRY *ae;
-    for(ae = host->health_log.alarms; ae && count < max ; count++, ae = ae->next) {
-        if(ae->unique_id > after) {
-            if(likely(count)) buffer_strcat(wb, ",");
-            health_alarm_entry2json_nolock(wb, ae, host);
-        }
-    }
-
-    buffer_strcat(wb, "\n]\n");
-
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
-}
-
-static inline void health_rrdcalc2json_nolock(BUFFER *wb, RRDCALC *rc) {
-    buffer_sprintf(wb,
-           "\t\t\"%s.%s\": {\n"
-                   "\t\t\t\"id\": %lu,\n"
-                   "\t\t\t\"name\": \"%s\",\n"
-                   "\t\t\t\"chart\": \"%s\",\n"
-                   "\t\t\t\"family\": \"%s\",\n"
-                   "\t\t\t\"active\": %s,\n"
-                   "\t\t\t\"exec\": \"%s\",\n"
-                   "\t\t\t\"recipient\": \"%s\",\n"
-                   "\t\t\t\"source\": \"%s\",\n"
-                   "\t\t\t\"units\": \"%s\",\n"
-                   "\t\t\t\"info\": \"%s\",\n"
-				   "\t\t\t\"status\": \"%s\",\n"
-                   "\t\t\t\"last_status_change\": %lu,\n"
-                   "\t\t\t\"last_updated\": %lu,\n"
-                   "\t\t\t\"next_update\": %lu,\n"
-                   "\t\t\t\"update_every\": %d,\n"
-                   "\t\t\t\"delay_up_duration\": %d,\n"
-                   "\t\t\t\"delay_down_duration\": %d,\n"
-                   "\t\t\t\"delay_max_duration\": %d,\n"
-                   "\t\t\t\"delay_multiplier\": %f,\n"
-                   "\t\t\t\"delay\": %d,\n"
-                   "\t\t\t\"delay_up_to_timestamp\": %lu,\n"
-            , rc->chart, rc->name
-            , (unsigned long)rc->id
-            , rc->name
-            , rc->chart
-            , (rc->rrdset && rc->rrdset->family)?rc->rrdset->family:""
-            , (rc->rrdset)?"true":"false"
-            , rc->exec?rc->exec:health.health_default_exec
-            , rc->recipient?rc->recipient:health.health_default_recipient
-            , rc->source
-            , rc->units?rc->units:""
-            , rc->info?rc->info:""
-            , rrdcalc_status2string(rc->status)
-            , (unsigned long)rc->last_status_change
-            , (unsigned long)rc->last_updated
-            , (unsigned long)rc->next_update
-            , rc->update_every
-            , rc->delay_up_duration
-            , rc->delay_down_duration
-            , rc->delay_max_duration
-            , rc->delay_multiplier
-            , rc->delay_last
-            , (unsigned long)rc->delay_up_to_timestamp
-    );
-
-    if(RRDCALC_HAS_DB_LOOKUP(rc)) {
-        if(rc->dimensions && *rc->dimensions)
-            health_string2json(wb, "\t\t\t", "lookup_dimensions", rc->dimensions, ",\n");
-
-        buffer_sprintf(wb,
-                       "\t\t\t\"db_after\": %lu,\n"
-                       "\t\t\t\"db_before\": %lu,\n"
-                       "\t\t\t\"lookup_method\": \"%s\",\n"
-                       "\t\t\t\"lookup_after\": %d,\n"
-                       "\t\t\t\"lookup_before\": %d,\n"
-                       "\t\t\t\"lookup_options\": \"",
-                       (unsigned long) rc->db_after,
-                       (unsigned long) rc->db_before,
-                       group_method2string(rc->group),
-                       rc->after,
-                       rc->before
-        );
-        buffer_data_options2string(wb, rc->options);
-        buffer_strcat(wb, "\",\n");
-    }
-
-    if(rc->calculation) {
-        health_string2json(wb, "\t\t\t", "calc", rc->calculation->source, ",\n");
-        health_string2json(wb, "\t\t\t", "calc_parsed", rc->calculation->parsed_as, ",\n");
-    }
-
-    if(rc->warning) {
-        health_string2json(wb, "\t\t\t", "warn", rc->warning->source, ",\n");
-        health_string2json(wb, "\t\t\t", "warn_parsed", rc->warning->parsed_as, ",\n");
-    }
-
-    if(rc->critical) {
-        health_string2json(wb, "\t\t\t", "crit", rc->critical->source, ",\n");
-        health_string2json(wb, "\t\t\t", "crit_parsed", rc->critical->parsed_as, ",\n");
-    }
-
-    buffer_strcat(wb, "\t\t\t\"green\":");
-    buffer_rrd_value(wb, rc->green);
-    buffer_strcat(wb, ",\n");
-
-    buffer_strcat(wb, "\t\t\t\"red\":");
-    buffer_rrd_value(wb, rc->red);
-    buffer_strcat(wb, ",\n");
-
-    buffer_strcat(wb, "\t\t\t\"value\":");
-    buffer_rrd_value(wb, rc->value);
-    buffer_strcat(wb, "\n");
-
-    buffer_strcat(wb, "\t\t}");
-}
-
-//void health_rrdcalctemplate2json_nolock(BUFFER *wb, RRDCALCTEMPLATE *rt) {
-//
-//}
-
-void health_alarms2json(RRDHOST *host, BUFFER *wb, int all) {
-    int i;
-
-    rrdhost_rdlock(&localhost);
-    buffer_sprintf(wb, "{\n\t\"hostname\": \"%s\","
-                        "\n\t\"latest_alarm_log_unique_id\": %u,"
-                        "\n\t\"status\": %s,"
-                        "\n\t\"now\": %lu,"
-                        "\n\t\"alarms\": {\n",
-                        host->hostname,
-                        (host->health_log.next_log_id > 0)?(host->health_log.next_log_id - 1):0,
-                        health_enabled?"true":"false",
-                        (unsigned long)now_realtime_sec());
-
-    RRDCALC *rc;
-    for(i = 0, rc = host->alarms; rc ; rc = rc->next) {
-        if(unlikely(!rc->rrdset || !rc->rrdset->last_collected_time.tv_sec))
-            continue;
-
-        if(likely(!all && !(rc->status == RRDCALC_STATUS_WARNING || rc->status == RRDCALC_STATUS_CRITICAL)))
-            continue;
-
-        if(likely(i)) buffer_strcat(wb, ",\n");
-        health_rrdcalc2json_nolock(wb, rc);
-        i++;
-    }
-
-//    buffer_strcat(wb, "\n\t},\n\t\"templates\": {");
-//    RRDCALCTEMPLATE *rt;
-//    for(rt = host->templates; rt ; rt = rt->next)
-//        health_rrdcalctemplate2json_nolock(wb, rt);
+// re-load health configuration
 
-    buffer_strcat(wb, "\n\t}\n}\n");
-    rrdhost_unlock(&localhost);
-}
+void health_reload_host(RRDHOST *host) {
+    if(unlikely(!host->health_enabled))
+        return;
 
+    char *path = health_config_dir();
 
-// ----------------------------------------------------------------------------
-// re-load health configuration
+    // free all running alarms
+    rrdhost_wrlock(host);
 
-static inline void health_free_all_nolock(RRDHOST *host) {
     while(host->templates)
         rrdcalctemplate_free(host, host->templates);
 
     while(host->alarms)
         rrdcalc_free(host, host->alarms);
-}
-
-void health_reload(void) {
-    if(!health_enabled) {
-        error("Health reload is requested, but health is not enabled.");
-        return;
-    }
-
-    char *path = health_config_dir();
 
-    // free all running alarms
-    rrdhost_rwlock(&localhost);
-    health_free_all_nolock(&localhost);
-    rrdhost_unlock(&localhost);
+    rrdhost_unlock(host);
 
     // invalidate all previous entries in the alarm log
     ALARM_ENTRY *t;
-    for(t = localhost.health_log.alarms ; t ; t = t->next) {
+    for(t = host->health_log.alarms ; t ; t = t->next) {
         if(t->new_status != RRDCALC_STATUS_REMOVED)
             t->flags |= HEALTH_ENTRY_FLAG_UPDATED;
     }
 
+    rrdhost_rdlock(host);
     // reset all thresholds to all charts
     RRDSET *st;
-    for(st = localhost.rrdset_root; st ; st = st->next) {
+    rrdset_foreach_read(st, host) {
         st->green = NAN;
         st->red = NAN;
     }
+    rrdhost_unlock(host);
 
     // load the new alarms
-    rrdhost_rwlock(&localhost);
-    health_readdir(path);
-    rrdhost_unlock(&localhost);
+    rrdhost_wrlock(host);
+    health_readdir(host, path);
 
     // link the loaded alarms to their charts
-    for(st = localhost.rrdset_root; st ; st = st->next) {
-        rrdhost_rwlock(&localhost);
-
+    rrdset_foreach_write(st, host) {
         rrdsetcalc_link_matching(st);
         rrdcalctemplate_link_matching(st);
-
-        rrdhost_unlock(&localhost);
     }
+
+    rrdhost_unlock(host);
+}
+
+void health_reload(void) {
+
+    rrd_rdlock();
+
+    RRDHOST *host;
+    rrdhost_foreach_read(host)
+        health_reload_host(host);
+
+    rrd_unlock();
 }
 
 // ----------------------------------------------------------------------------
@@ -2601,12 +97,21 @@ static inline void health_alarm_execute(RRDHOST *host, ALARM_ENTRY *ae) {
 
     if(unlikely(ae->new_status < RRDCALC_STATUS_CLEAR)) {
         // do not send notifications for internal statuses
+        debug(D_HEALTH, "Health not sending notification for alarm '%s.%s' status %s (internal statuses)", ae->chart, ae->name, rrdcalc_status2string(ae->new_status));
+        goto done;
+    }
+
+    if(unlikely(ae->new_status <= RRDCALC_STATUS_CLEAR && (ae->flags & HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION))) {
+        // do not send notifications for disabled statuses
+        debug(D_HEALTH, "Health not sending notification for alarm '%s.%s' status %s (it has no-clear-notification enabled)", ae->chart, ae->name, rrdcalc_status2string(ae->new_status));
+        // mark it as run, so that we will send the same alarm if it happens again
         goto done;
     }
 
     // find the previous notification for the same alarm
     // which we have run the exec script
-    {
+    // exception: alarms with HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION set
+    if(likely(!(ae->flags & HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION))) {
         uint32_t id = ae->alarm_id;
         ALARM_ENTRY *t;
         for(t = ae->next; t ; t = t->next) {
@@ -2637,13 +142,10 @@ static inline void health_alarm_execute(RRDHOST *host, ALARM_ENTRY *ae) {
     static char command_to_run[ALARM_EXEC_COMMAND_LENGTH + 1];
     pid_t command_pid;
 
-    const char *exec = ae->exec;
-    if(!exec) exec = health.health_default_exec;
+    const char *exec      = (ae->exec)      ? ae->exec      : host->health_default_exec;
+    const char *recipient = (ae->recipient) ? ae->recipient : host->health_default_recipient;
 
-    const char *recipient = ae->recipient;
-    if(!recipient) recipient = health.health_default_recipient;
-
-    snprintfz(command_to_run, ALARM_EXEC_COMMAND_LENGTH, "exec %s '%s' '%s' '%u' '%u' '%u' '%lu' '%s' '%s' '%s' '%s' '%s' '%0.0Lf' '%0.0Lf' '%s' '%u' '%u' '%s' '%s'",
+    snprintfz(command_to_run, ALARM_EXEC_COMMAND_LENGTH, "exec %s '%s' '%s' '%u' '%u' '%u' '%lu' '%s' '%s' '%s' '%s' '%s' '%0.0Lf' '%0.0Lf' '%s' '%u' '%u' '%s' '%s' '%s' '%s'",
               exec,
               recipient,
               host->hostname,
@@ -2662,7 +164,9 @@ static inline void health_alarm_execute(RRDHOST *host, ALARM_ENTRY *ae) {
               (uint32_t)ae->duration,
               (uint32_t)ae->non_clear_duration,
               ae->units?ae->units:"",
-              ae->info?ae->info:""
+              ae->info?ae->info:"",
+              ae->new_value_string,
+              ae->old_value_string
     );
 
     ae->flags |= HEALTH_ENTRY_FLAG_EXEC_RUN;
@@ -2704,7 +208,7 @@ static inline void health_alarm_log_process(RRDHOST *host) {
     uint32_t first_waiting = (host->health_log.alarms)?host->health_log.alarms->unique_id:0;
     time_t now = now_realtime_sec();
 
-    pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
+    netdata_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
 
     ALARM_ENTRY *ae;
     for(ae = host->health_log.alarms; ae && ae->unique_id >= stop_at_id ; ae = ae->next) {
@@ -2724,13 +228,13 @@ static inline void health_alarm_log_process(RRDHOST *host) {
     // remember this for the next iteration
     stop_at_id = first_waiting;
 
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+    netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock);
 
     if(host->health_log.count <= host->health_log.max)
         return;
 
     // cleanup excess entries in the log
-    pthread_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
+    netdata_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
 
     ALARM_ENTRY *last = NULL;
     unsigned int count = host->health_log.max * 2 / 3;
@@ -2746,21 +250,13 @@ static inline void health_alarm_log_process(RRDHOST *host) {
 
         ALARM_ENTRY *t = ae->next;
 
-        freez(ae->name);
-        freez(ae->chart);
-        freez(ae->family);
-        freez(ae->exec);
-        freez(ae->recipient);
-        freez(ae->source);
-        freez(ae->units);
-        freez(ae->info);
-        freez(ae);
+        health_alarm_log_free_one_nochecks_nounlink(ae);
 
         ae = t;
         host->health_log.count--;
     }
 
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+    netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock);
 }
 
 static inline int rrdcalc_isrunnable(RRDCALC *rc, time_t now, time_t *next_run) {
@@ -2785,6 +281,16 @@ static inline int rrdcalc_isrunnable(RRDCALC *rc, time_t now, time_t *next_run)
         return 0;
     }
 
+    if(unlikely(rrdset_flag_check(rc->rrdset, RRDSET_FLAG_OBSOLETE))) {
+        debug(D_HEALTH, "Health not running alarm '%s.%s'. The chart has been marked as obsolete", rc->chart?rc->chart:"NOCHART", rc->name);
+        return 0;
+    }
+
+    if(unlikely(!rrdset_flag_check(rc->rrdset, RRDSET_FLAG_ENABLED))) {
+        debug(D_HEALTH, "Health not running alarm '%s.%s'. The chart is not enabled", rc->chart?rc->chart:"NOCHART", rc->name);
+        return 0;
+    }
+
     if(unlikely(!rc->rrdset->last_collected_time.tv_sec || rc->rrdset->counter_done < 2)) {
         debug(D_HEALTH, "Health not running alarm '%s.%s'. Chart is not fully collected yet.", rc->chart?rc->chart:"NOCHART", rc->name);
         return 0;
@@ -2828,299 +334,396 @@ void *health_main(void *ptr) {
     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
         error("Cannot set pthread cancel state to ENABLE.");
 
-    int min_run_every = (int)config_get_number("health", "run at least every seconds", 10);
+    int min_run_every = (int)config_get_number(CONFIG_SECTION_HEALTH, "run at least every seconds", 10);
     if(min_run_every < 1) min_run_every = 1;
 
     BUFFER *wb = buffer_create(100);
 
+    time_t now               = now_realtime_sec();
+    time_t now_boottime      = now_boottime_sec();
+    time_t last_now          = now;
+    time_t last_now_boottime = now_boottime;
+    time_t hibernation_delay = config_get_number(CONFIG_SECTION_HEALTH, "postpone alarms during hibernation for seconds", 60);
+
     unsigned int loop = 0;
-    while(health_enabled && !netdata_exit) {
+    while(!netdata_exit) {
         loop++;
         debug(D_HEALTH, "Health monitoring iteration no %u started", loop);
 
-        int oldstate, runnable = 0;
-        time_t now = now_realtime_sec();
+        int oldstate, runnable = 0, apply_hibernation_delay = 0;
         time_t next_run = now + min_run_every;
         RRDCALC *rc;
 
+        // detect if boottime and realtime have twice the difference
+        // in which case we assume the system was just waken from hibernation
+        if(unlikely(now - last_now > 2 * (now_boottime - last_now_boottime)))
+            apply_hibernation_delay = 1;
+
+        last_now = now;
+        last_now_boottime = now_boottime;
+
         if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldstate) != 0))
             error("Cannot set pthread cancel state to DISABLE.");
 
-        rrdhost_rdlock(&localhost);
+        rrd_rdlock();
 
-        // the first loop is to lookup values from the db
-        for(rc = localhost.alarms; rc; rc = rc->next) {
-            if(unlikely(!rrdcalc_isrunnable(rc, now, &next_run))) {
-                if(unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_RUNNABLE))
-                    rc->rrdcalc_flags &= ~RRDCALC_FLAG_RUNNABLE;
+        RRDHOST *host;
+        rrdhost_foreach_read(host) {
+            if(unlikely(!host->health_enabled))
                 continue;
-            }
-
-            runnable++;
-            rc->old_value = rc->value;
-            rc->rrdcalc_flags |= RRDCALC_FLAG_RUNNABLE;
 
-            // 1. if there is database lookup, do it
-            // 2. if there is calculation expression, run it
+            if(unlikely(apply_hibernation_delay)) {
 
-            if (unlikely(RRDCALC_HAS_DB_LOOKUP(rc))) {
-                /* time_t old_db_timestamp = rc->db_before; */
-                int value_is_null = 0;
+                info("Postponing alarm checks for %ld seconds, on host '%s', due to boottime discrepancy (realtime dt: %ld, boottime dt: %ld)."
+                     , hibernation_delay
+                     , host->hostname
+                     , (long)(now - last_now)
+                     , (long)(now_boottime - last_now_boottime)
+                );
 
-                int ret = rrd2value(rc->rrdset, wb, &rc->value,
-                                    rc->dimensions, 1, rc->after, rc->before, rc->group,
-                                    rc->options, &rc->db_after, &rc->db_before, &value_is_null);
+                host->health_delay_up_to = now + hibernation_delay;
+            }
 
-                if (unlikely(ret != 200)) {
-                    // database lookup failed
-                    rc->value = NAN;
+            if(unlikely(!host->health_enabled || now < host->health_delay_up_to))
+                continue;
 
-                    debug(D_HEALTH, "Health alarm '%s.%s': database lookup returned error %d", rc->chart?rc->chart:"NOCHART", rc->name, ret);
+            rrdhost_rdlock(host);
 
-                    if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_DB_ERROR))) {
-                        rc->rrdcalc_flags |= RRDCALC_FLAG_DB_ERROR;
-                        error("Health alarm '%s.%s': database lookup returned error %d", rc->chart?rc->chart:"NOCHART", rc->name, ret);
-                    }
+            // the first loop is to lookup values from the db
+            for(rc = host->alarms; rc; rc = rc->next) {
+                if(unlikely(!rrdcalc_isrunnable(rc, now, &next_run))) {
+                    if(unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_RUNNABLE))
+                        rc->rrdcalc_flags &= ~RRDCALC_FLAG_RUNNABLE;
+                    continue;
                 }
-                else if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_DB_ERROR))
-                    rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_ERROR;
 
-                /* - RRDCALC_FLAG_DB_STALE not currently used
-                if (unlikely(old_db_timestamp == rc->db_before)) {
-                    // database is stale
+                runnable++;
+                rc->old_value = rc->value;
+                rc->rrdcalc_flags |= RRDCALC_FLAG_RUNNABLE;
+
+                // ------------------------------------------------------------
+                // if there is database lookup, do it
+
+                if(unlikely(RRDCALC_HAS_DB_LOOKUP(rc))) {
+                    /* time_t old_db_timestamp = rc->db_before; */
+                    int value_is_null = 0;
+
+                    int ret = rrdset2value_api_v1(rc->rrdset
+                                                  , wb
+                                                  , &rc->value
+                                                  , rc->dimensions
+                                                  , 1
+                                                  , rc->after
+                                                  , rc->before
+                                                  , rc->group
+                                                  , rc->options
+                                                  , &rc->db_after
+                                                  , &rc->db_before
+                                                  , &value_is_null
+                    );
 
-                    debug(D_HEALTH, "Health alarm '%s.%s': database is stale", rc->chart?rc->chart:"NOCHART", rc->name);
+                    if(unlikely(ret != 200)) {
+                        // database lookup failed
+                        rc->value = NAN;
+                        rc->rrdcalc_flags |= RRDCALC_FLAG_DB_ERROR;
 
-                    if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_DB_STALE))) {
-                        rc->rrdcalc_flags |= RRDCALC_FLAG_DB_STALE;
-                        error("Health alarm '%s.%s': database is stale", rc->chart?rc->chart:"NOCHART", rc->name);
+                        debug(D_HEALTH
+                              , "Health on host '%s', alarm '%s.%s': database lookup returned error %d"
+                              , host->hostname
+                              , rc->chart ? rc->chart : "NOCHART"
+                              , rc->name
+                              , ret
+                        );
                     }
-                }
-                else if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_DB_STALE))
-                    rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_STALE;
-                */
+                    else
+                        rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_ERROR;
 
-                if (unlikely(value_is_null)) {
-                    // collected value is null
+                    /* - RRDCALC_FLAG_DB_STALE not currently used
+                    if (unlikely(old_db_timestamp == rc->db_before)) {
+                        // database is stale
 
-                    rc->value = NAN;
+                        debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': database is stale", host->hostname, rc->chart?rc->chart:"NOCHART", rc->name);
 
-                    debug(D_HEALTH, "Health alarm '%s.%s': database lookup returned empty value (possibly value is not collected yet)",
-                          rc->chart?rc->chart:"NOCHART", rc->name);
+                        if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_DB_STALE))) {
+                            rc->rrdcalc_flags |= RRDCALC_FLAG_DB_STALE;
+                            error("Health on host '%s', alarm '%s.%s': database is stale", host->hostname, rc->chart?rc->chart:"NOCHART", rc->name);
+                        }
+                    }
+                    else if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_DB_STALE))
+                        rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_STALE;
+                    */
 
-                    if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_DB_NAN))) {
+                    if(unlikely(value_is_null)) {
+                        // collected value is null
+                        rc->value = NAN;
                         rc->rrdcalc_flags |= RRDCALC_FLAG_DB_NAN;
-                        error("Health alarm '%s.%s': database lookup returned empty value (possibly value is not collected yet)",
-                              rc->chart?rc->chart:"NOCHART", rc->name);
+
+                        debug(D_HEALTH
+                              , "Health on host '%s', alarm '%s.%s': database lookup returned empty value (possibly value is not collected yet)"
+                              , host->hostname
+                              , rc->chart ? rc->chart : "NOCHART"
+                              , rc->name
+                        );
                     }
+                    else
+                        rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_NAN;
+
+                    debug(D_HEALTH
+                          , "Health on host '%s', alarm '%s.%s': database lookup gave value " CALCULATED_NUMBER_FORMAT
+                          , host->hostname
+                          , rc->chart ? rc->chart : "NOCHART"
+                          , rc->name
+                          , rc->value
+                    );
                 }
-                else if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_DB_NAN))
-                    rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_NAN;
-
-                debug(D_HEALTH, "Health alarm '%s.%s': database lookup gave value "
-                        CALCULATED_NUMBER_FORMAT, rc->chart?rc->chart:"NOCHART", rc->name, rc->value);
-            }
 
-            if(unlikely(rc->calculation)) {
-                if (unlikely(!expression_evaluate(rc->calculation))) {
-                    // calculation failed
+                // ------------------------------------------------------------
+                // if there is calculation expression, run it
 
-                    rc->value = NAN;
-
-                    debug(D_HEALTH, "Health alarm '%s.%s': expression '%s' failed: %s",
-                          rc->chart?rc->chart:"NOCHART", rc->name, rc->calculation->parsed_as, buffer_tostring(rc->calculation->error_msg));
-
-                    if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_CALC_ERROR))) {
+                if(unlikely(rc->calculation)) {
+                    if(unlikely(!expression_evaluate(rc->calculation))) {
+                        // calculation failed
+                        rc->value = NAN;
                         rc->rrdcalc_flags |= RRDCALC_FLAG_CALC_ERROR;
-                        error("Health alarm '%s.%s': expression '%s' failed: %s",
-                              rc->chart?rc->chart:"NOCHART", rc->name, rc->calculation->parsed_as, buffer_tostring(rc->calculation->error_msg));
+
+                        debug(D_HEALTH
+                              , "Health on host '%s', alarm '%s.%s': expression '%s' failed: %s"
+                              , host->hostname
+                              , rc->chart ? rc->chart : "NOCHART"
+                              , rc->name
+                              , rc->calculation->parsed_as
+                              , buffer_tostring(rc->calculation->error_msg)
+                        );
                     }
-                }
-                else {
-                    if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_CALC_ERROR))
+                    else {
                         rc->rrdcalc_flags &= ~RRDCALC_FLAG_CALC_ERROR;
 
-                    debug(D_HEALTH, "Health alarm '%s.%s': expression '%s' gave value "
-                            CALCULATED_NUMBER_FORMAT
-                            ": %s (source: %s)",
-                          rc->chart?rc->chart:"NOCHART", rc->name,
-                          rc->calculation->parsed_as,
-                          rc->calculation->result,
-                          buffer_tostring(rc->calculation->error_msg),
-                          rc->source
-                    );
+                        debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': expression '%s' gave value " CALCULATED_NUMBER_FORMAT ": %s (source: %s)"
+                              , host->hostname
+                              , rc->chart ? rc->chart : "NOCHART"
+                              , rc->name
+                              , rc->calculation->parsed_as
+                              , rc->calculation->result
+                              , buffer_tostring(rc->calculation->error_msg)
+                              , rc->source
+                        );
 
-                    rc->value = rc->calculation->result;
+                        rc->value = rc->calculation->result;
+                    }
                 }
             }
-        }
-        rrdhost_unlock(&localhost);
+            rrdhost_unlock(host);
 
-        if(unlikely(runnable && !netdata_exit)) {
-            rrdhost_rdlock(&localhost);
+            if(unlikely(runnable && !netdata_exit)) {
+                rrdhost_rdlock(host);
 
-            for(rc = localhost.alarms; rc; rc = rc->next) {
-                if(unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_RUNNABLE)))
-                    continue;
+                for(rc = host->alarms; rc; rc = rc->next) {
+                    if(unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_RUNNABLE)))
+                        continue;
 
-                int warning_status  = RRDCALC_STATUS_UNDEFINED;
-                int critical_status = RRDCALC_STATUS_UNDEFINED;
+                    int warning_status  = RRDCALC_STATUS_UNDEFINED;
+                    int critical_status = RRDCALC_STATUS_UNDEFINED;
 
-                if(likely(rc->warning)) {
-                    if(unlikely(!expression_evaluate(rc->warning))) {
-                        // calculation failed
+                    // --------------------------------------------------------
+                    // check the warning expression
 
-                        debug(D_HEALTH, "Health alarm '%s.%s': warning expression failed with error: %s",
-                              rc->chart?rc->chart:"NOCHART", rc->name, buffer_tostring(rc->warning->error_msg));
-
-                        if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_WARN_ERROR))) {
+                    if(likely(rc->warning)) {
+                        if(unlikely(!expression_evaluate(rc->warning))) {
+                            // calculation failed
                             rc->rrdcalc_flags |= RRDCALC_FLAG_WARN_ERROR;
-                            error("Health alarm '%s.%s': warning expression failed with error: %s",
-                                  rc->chart?rc->chart:"NOCHART", rc->name, buffer_tostring(rc->warning->error_msg));
+
+                            debug(D_HEALTH
+                                  , "Health on host '%s', alarm '%s.%s': warning expression failed with error: %s"
+                                  , host->hostname
+                                  , rc->chart ? rc->chart : "NOCHART"
+                                  , rc->name
+                                  , buffer_tostring(rc->warning->error_msg)
+                            );
                         }
-                    }
-                    else {
-                        if(unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_WARN_ERROR))
+                        else {
                             rc->rrdcalc_flags &= ~RRDCALC_FLAG_WARN_ERROR;
-
-                        debug(D_HEALTH, "Health alarm '%s.%s': warning expression gave value "
-                                CALCULATED_NUMBER_FORMAT
-                                ": %s (source: %s)",
-                              rc->chart?rc->chart:"NOCHART", rc->name,
-                              rc->warning->result,
-                              buffer_tostring(rc->warning->error_msg),
-                              rc->source
-                        );
-
-                        warning_status = rrdcalc_value2status(rc->warning->result);
+                            debug(D_HEALTH
+                                  , "Health on host '%s', alarm '%s.%s': warning expression gave value " CALCULATED_NUMBER_FORMAT ": %s (source: %s)"
+                                  , host->hostname
+                                  , rc->chart ? rc->chart : "NOCHART"
+                                  , rc->name
+                                  , rc->warning->result
+                                  , buffer_tostring(rc->warning->error_msg)
+                                  , rc->source
+                            );
+                            warning_status = rrdcalc_value2status(rc->warning->result);
+                        }
                     }
-                }
 
-                if(likely(rc->critical)) {
-                    if(unlikely(!expression_evaluate(rc->critical))) {
-                        // calculation failed
+                    // --------------------------------------------------------
+                    // check the critical expression
 
-                        debug(D_HEALTH, "Health alarm '%s.%s': critical expression failed with error: %s",
-                              rc->chart?rc->chart:"NOCHART", rc->name, buffer_tostring(rc->critical->error_msg));
-
-                        if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_CRIT_ERROR))) {
+                    if(likely(rc->critical)) {
+                        if(unlikely(!expression_evaluate(rc->critical))) {
+                            // calculation failed
                             rc->rrdcalc_flags |= RRDCALC_FLAG_CRIT_ERROR;
-                            error("Health alarm '%s.%s': critical expression failed with error: %s",
-                                  rc->chart?rc->chart:"NOCHART", rc->name, buffer_tostring(rc->critical->error_msg));
+
+                            debug(D_HEALTH
+                                  , "Health on host '%s', alarm '%s.%s': critical expression failed with error: %s"
+                                  , host->hostname
+                                  , rc->chart ? rc->chart : "NOCHART"
+                                  , rc->name
+                                  , buffer_tostring(rc->critical->error_msg)
+                            );
                         }
-                    }
-                    else {
-                        if(unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_CRIT_ERROR))
+                        else {
                             rc->rrdcalc_flags &= ~RRDCALC_FLAG_CRIT_ERROR;
+                            debug(D_HEALTH
+                                  , "Health on host '%s', alarm '%s.%s': critical expression gave value " CALCULATED_NUMBER_FORMAT ": %s (source: %s)"
+                                  , host->hostname
+                                  , rc->chart ? rc->chart : "NOCHART"
+                                  , rc->name
+                                  , rc->critical->result
+                                  , buffer_tostring(rc->critical->error_msg)
+                                  , rc->source
+                            );
+                            critical_status = rrdcalc_value2status(rc->critical->result);
+                        }
+                    }
 
-                        debug(D_HEALTH, "Health alarm '%s.%s': critical expression gave value "
-                                CALCULATED_NUMBER_FORMAT
-                                ": %s (source: %s)",
-                              rc->chart?rc->chart:"NOCHART", rc->name,
-                              rc->critical->result,
-                              buffer_tostring(rc->critical->error_msg),
-                              rc->source
-                        );
+                    // --------------------------------------------------------
+                    // decide the final alarm status
 
-                        critical_status = rrdcalc_value2status(rc->critical->result);
+                    int status = RRDCALC_STATUS_UNDEFINED;
+
+                    switch(warning_status) {
+                        case RRDCALC_STATUS_CLEAR:
+                            status = RRDCALC_STATUS_CLEAR;
+                            break;
+
+                        case RRDCALC_STATUS_RAISED:
+                            status = RRDCALC_STATUS_WARNING;
+                            break;
+
+                        default:
+                            break;
                     }
-                }
 
-                int status = RRDCALC_STATUS_UNDEFINED;
+                    switch(critical_status) {
+                        case RRDCALC_STATUS_CLEAR:
+                            if(status == RRDCALC_STATUS_UNDEFINED)
+                                status = RRDCALC_STATUS_CLEAR;
+                            break;
 
-                switch(warning_status) {
-                    case RRDCALC_STATUS_CLEAR:
-                        status = RRDCALC_STATUS_CLEAR;
-                        break;
+                        case RRDCALC_STATUS_RAISED:
+                            status = RRDCALC_STATUS_CRITICAL;
+                            break;
 
-                    case RRDCALC_STATUS_RAISED:
-                        status = RRDCALC_STATUS_WARNING;
-                        break;
+                        default:
+                            break;
+                    }
 
-                    default:
-                        break;
-                }
+                    // --------------------------------------------------------
+                    // check if the new status and the old differ
 
-                switch(critical_status) {
-                    case RRDCALC_STATUS_CLEAR:
-                        if(status == RRDCALC_STATUS_UNDEFINED)
-                            status = RRDCALC_STATUS_CLEAR;
-                        break;
+                    if(status != rc->status) {
+                        int delay = 0;
 
-                    case RRDCALC_STATUS_RAISED:
-                        status = RRDCALC_STATUS_CRITICAL;
-                        break;
+                        // apply trigger hysteresis
 
-                    default:
-                        break;
-                }
+                        if(now > rc->delay_up_to_timestamp) {
+                            rc->delay_up_current = rc->delay_up_duration;
+                            rc->delay_down_current = rc->delay_down_duration;
+                            rc->delay_last = 0;
+                            rc->delay_up_to_timestamp = 0;
+                        }
+                        else {
+                            rc->delay_up_current = (int) (rc->delay_up_current * rc->delay_multiplier);
+                            if(rc->delay_up_current > rc->delay_max_duration)
+                                rc->delay_up_current = rc->delay_max_duration;
+
+                            rc->delay_down_current = (int) (rc->delay_down_current * rc->delay_multiplier);
+                            if(rc->delay_down_current > rc->delay_max_duration)
+                                rc->delay_down_current = rc->delay_max_duration;
+                        }
 
-                if(status != rc->status) {
-                    int delay = 0;
+                        if(status > rc->status)
+                            delay = rc->delay_up_current;
+                        else
+                            delay = rc->delay_down_current;
+
+                        // COMMENTED: because we do need to send raising alarms
+                        // if(now + delay < rc->delay_up_to_timestamp)
+                        //    delay = (int)(rc->delay_up_to_timestamp - now);
+
+                        rc->delay_last = delay;
+                        rc->delay_up_to_timestamp = now + delay;
+
+                        // add the alarm into the log
+
+                        health_alarm_log(
+                                host
+                                , rc->id
+                                , rc->next_event_id++
+                                , now
+                                , rc->name
+                                , rc->rrdset->id
+                                , rc->rrdset->family
+                                , rc->exec
+                                , rc->recipient
+                                , now - rc->last_status_change
+                                , rc->old_value
+                                , rc->value
+                                , rc->status
+                                , status
+                                , rc->source
+                                , rc->units
+                                , rc->info
+                                , rc->delay_last
+                                , (rc->options & RRDCALC_FLAG_NO_CLEAR_NOTIFICATION) ? HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION : 0
+                        );
 
-                    if(now > rc->delay_up_to_timestamp) {
-                        rc->delay_up_current = rc->delay_up_duration;
-                        rc->delay_down_current = rc->delay_down_duration;
-                        rc->delay_last = 0;
-                        rc->delay_up_to_timestamp = 0;
+                        rc->last_status_change = now;
+                        rc->status = status;
                     }
-                    else {
-                        rc->delay_up_current = (int)(rc->delay_up_current * rc->delay_multiplier);
-                        if(rc->delay_up_current > rc->delay_max_duration) rc->delay_up_current = rc->delay_max_duration;
 
-                        rc->delay_down_current = (int)(rc->delay_down_current * rc->delay_multiplier);
-                        if(rc->delay_down_current > rc->delay_max_duration) rc->delay_down_current = rc->delay_max_duration;
-                    }
+                    rc->last_updated = now;
+                    rc->next_update = now + rc->update_every;
 
-                    if(status > rc->status)
-                        delay = rc->delay_up_current;
-                    else
-                        delay = rc->delay_down_current;
+                    if(next_run > rc->next_update)
+                        next_run = rc->next_update;
+                }
 
-                    // COMMENTED: because we do need to send raising alarms
-                    // if(now + delay < rc->delay_up_to_timestamp)
-                    //    delay = (int)(rc->delay_up_to_timestamp - now);
+                rrdhost_unlock(host);
+            }
 
-                    rc->delay_last = delay;
-                    rc->delay_up_to_timestamp = now + delay;
-                    health_alarm_log(&localhost, rc->id, rc->next_event_id++, now, rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->status, status, rc->source, rc->units, rc->info, rc->delay_last);
-                    rc->last_status_change = now;
-                    rc->status = status;
-                }
+            if(unlikely(netdata_exit))
+                break;
 
-                rc->last_updated = now;
-                rc->next_update = now + rc->update_every;
+            // execute notifications
+            // and cleanup
+            health_alarm_log_process(host);
 
-                if (next_run > rc->next_update)
-                    next_run = rc->next_update;
-            }
+            if(unlikely(netdata_exit))
+                break;
 
-            rrdhost_unlock(&localhost);
-        }
+        } /* rrdhost_foreach */
+
+        rrd_unlock();
 
-        if (unlikely(pthread_setcancelstate(oldstate, NULL) != 0))
+        if(unlikely(pthread_setcancelstate(oldstate, NULL) != 0))
             error("Cannot set pthread cancel state to RESTORE (%d).", oldstate);
 
         if(unlikely(netdata_exit))
             break;
 
-        // execute notifications
-        // and cleanup
-        health_alarm_log_process(&localhost);
-
-        if(unlikely(netdata_exit))
-            break;
-        
         now = now_realtime_sec();
         if(now < next_run) {
-            debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration in %d secs",
-                  loop, (int) (next_run - now));
+            debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration in %d secs", loop, (int) (next_run - now));
             sleep_usec(USEC_PER_SEC * (usec_t) (next_run - now));
+            now = now_realtime_sec();
         }
-        else {
+        else
             debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration now", loop);
-        }
-    }
+
+        now_boottime = now_boottime_sec();
+
+    } // forever
 
     buffer_free(wb);