New upstream version 1.6.0+dfsg

1 files changed, 465 insertions, 0 deletions

diff --git a/src/health_log.c b/src/health_log.c
new file mode 100644
index 00000000..95abcfe5
--- /dev/null
+++ b/src/health_log.c
@@ -0,0 +1,465 @@
+#define NETDATA_HEALTH_INTERNALS
+#include "common.h"
+
+// ----------------------------------------------------------------------------
+// health alarm log load/save
+// no need for locking - only one thread is reading / writing the alarms log
+
+inline int health_alarm_log_open(RRDHOST *host) {
+    if(host->health_log_fp)
+        fclose(host->health_log_fp);
+
+    host->health_log_fp = fopen(host->health_log_filename, "a");
+
+    if(host->health_log_fp) {
+        if (setvbuf(host->health_log_fp, NULL, _IOLBF, 0) != 0)
+            error("HEALTH [%s]: cannot set line buffering on health log file '%s'.", host->hostname, host->health_log_filename);
+        return 0;
+    }
+
+    error("HEALTH [%s]: cannot open health log file '%s'. Health data will be lost in case of netdata or server crash.", host->hostname, host->health_log_filename);
+    return -1;
+}
+
+inline void health_alarm_log_close(RRDHOST *host) {
+    if(host->health_log_fp) {
+        fclose(host->health_log_fp);
+        host->health_log_fp = NULL;
+    }
+}
+
+inline void health_log_rotate(RRDHOST *host) {
+    static size_t rotate_every = 0;
+
+    if(unlikely(rotate_every == 0)) {
+        rotate_every = (size_t)config_get_number(CONFIG_SECTION_HEALTH, "rotate log every lines", 2000);
+        if(rotate_every < 100) rotate_every = 100;
+    }
+
+    if(unlikely(host->health_log_entries_written > rotate_every)) {
+        health_alarm_log_close(host);
+
+        char old_filename[FILENAME_MAX + 1];
+        snprintfz(old_filename, FILENAME_MAX, "%s.old", host->health_log_filename);
+
+        if(unlink(old_filename) == -1 && errno != ENOENT)
+            error("HEALTH [%s]: cannot remove old alarms log file '%s'", host->hostname, old_filename);
+
+        if(link(host->health_log_filename, old_filename) == -1 && errno != ENOENT)
+            error("HEALTH [%s]: cannot move file '%s' to '%s'.", host->hostname, host->health_log_filename, old_filename);
+
+        if(unlink(host->health_log_filename) == -1 && errno != ENOENT)
+            error("HEALTH [%s]: cannot remove old alarms log file '%s'", host->hostname, host->health_log_filename);
+
+        // open it with truncate
+        host->health_log_fp = fopen(host->health_log_filename, "w");
+
+        if(host->health_log_fp)
+            fclose(host->health_log_fp);
+        else
+            error("HEALTH [%s]: cannot truncate health log '%s'", host->hostname, host->health_log_filename);
+
+        host->health_log_fp = NULL;
+
+        host->health_log_entries_written = 0;
+        health_alarm_log_open(host);
+    }
+}
+
+inline void health_alarm_log_save(RRDHOST *host, ALARM_ENTRY *ae) {
+    health_log_rotate(host);
+
+    if(likely(host->health_log_fp)) {
+        if(unlikely(fprintf(host->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 [%s]: failed to save alarm log entry to '%s'. Health data may be lost in case of abnormal restart.", host->hostname, host->health_log_filename);
+        else {
+            ae->flags |= HEALTH_ENTRY_FLAG_SAVED;
+            host->health_log_entries_written++;
+        }
+    }
+}
+
+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;
+
+    netdata_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
+
+    while((s = fgets_trim_len(buf, 65536, fp, &len))) {
+        host->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 [%s]: line %zu of file '%s' has more than %d entries. Ignoring excessive entries.", host->hostname, line, filename, max_entries);
+                    break;
+                }
+            }
+            else s++;
+        }
+
+        if(likely(*pointers[0] == 'U' || *pointers[0] == 'A')) {
+            ALARM_ENTRY *ae = NULL;
+
+            if(entries < 26) {
+                error("HEALTH [%s]: line %zu of file '%s' should have at least 26 entries, but it has %d. Ignoring it.", host->hostname, 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 [%s]: line %zu of file '%s' states alarm entry with invalid unique id %u (%s). Ignoring it.", host->hostname, line, filename, unique_id, pointers[2]);
+                errored++;
+                continue;
+            }
+
+            uint32_t alarm_id = (uint32_t)strtoul(pointers[3], NULL, 16);
+            if(!alarm_id) {
+                error("HEALTH [%s]: line %zu of file '%s' states alarm entry for invalid alarm id %u (%s). Ignoring it.", host->hostname, 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 [%s]: line %zu of file '%s' has alarm log entry %u in wrong order. Ignoring it.", host->hostname, 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 [%s]: line %zu of file '%s' adds duplicate alarm log entry %u. Using the later."
+                                  , host->hostname, 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(unlikely(!ae)) {
+                // error("HEALTH [%s]: line %zu of file '%s' updates alarm log entry with unique id %u, but it is not found.", host->hostname, line, filename, unique_id);
+                continue;
+            }
+
+            // check for a possible host missmatch
+            //if(strcmp(pointers[1], host->hostname))
+            //    error("HEALTH [%s]: line %zu of file '%s' provides an alarm for host '%s' but this is named '%s'.", host->hostname, 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);
+
+            freez(ae->name);
+            ae->name = strdupz(pointers[13]);
+            ae->hash_name = simple_hash(ae->name);
+
+            freez(ae->chart);
+            ae->chart = strdupz(pointers[14]);
+            ae->hash_chart = simple_hash(ae->chart);
+
+            freez(ae->family);
+            ae->family = strdupz(pointers[15]);
+
+            freez(ae->exec);
+            ae->exec = strdupz(pointers[16]);
+            if(!*ae->exec) { freez(ae->exec); ae->exec = NULL; }
+
+            freez(ae->recipient);
+            ae->recipient = strdupz(pointers[17]);
+            if(!*ae->recipient) { freez(ae->recipient); ae->recipient = NULL; }
+
+            freez(ae->source);
+            ae->source = strdupz(pointers[18]);
+            if(!*ae->source) { freez(ae->source); ae->source = NULL; }
+
+            freez(ae->units);
+            ae->units = strdupz(pointers[19]);
+            if(!*ae->units) { freez(ae->units); ae->units = NULL; }
+
+            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]);
+
+            static char value_string[100 + 1];
+            freez(ae->old_value_string);
+            freez(ae->new_value_string);
+            ae->old_value_string = strdupz(format_value_and_unit(value_string, 100, ae->old_value, ae->units, -1));
+            ae->new_value_string = strdupz(format_value_and_unit(value_string, 100, ae->new_value, ae->units, -1));
+
+            // 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 [%s]: line %zu of file '%s' is invalid (unrecognized entry type '%s').", host->hostname, line, filename, pointers[0]);
+            errored++;
+        }
+    }
+
+    netdata_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 [%s]: loaded file '%s' with %zd new alarm entries, updated %zd alarms, errors %zd entries, duplicate %zd", host->hostname, filename, loaded, updated, errored, duplicate);
+    return loaded;
+}
+
+inline void health_alarm_log_load(RRDHOST *host) {
+    health_alarm_log_close(host);
+
+    char filename[FILENAME_MAX + 1];
+    snprintfz(filename, FILENAME_MAX, "%s.old", host->health_log_filename);
+    FILE *fp = fopen(filename, "r");
+    if(!fp)
+        error("HEALTH [%s]: cannot open health file: %s", host->hostname, filename);
+    else {
+        health_alarm_log_read(host, fp, filename);
+        fclose(fp);
+    }
+
+    host->health_log_entries_written = 0;
+    fp = fopen(host->health_log_filename, "r");
+    if(!fp)
+        error("HEALTH [%s]: cannot open health file: %s", host->hostname, host->health_log_filename);
+    else {
+        health_alarm_log_read(host, fp, host->health_log_filename);
+        fclose(fp);
+    }
+
+    health_alarm_log_open(host);
+}
+
+
+// ----------------------------------------------------------------------------
+// health alarm log management
+
+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,
+        uint32_t flags
+) {
+    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;
+
+    static char value_string[100 + 1];
+    ae->old_value_string = strdupz(format_value_and_unit(value_string, 100, ae->old_value, ae->units, -1));
+    ae->new_value_string = strdupz(format_value_and_unit(value_string, 100, ae->new_value, ae->units, -1));
+
+    ae->old_status = old_status;
+    ae->new_status = new_status;
+    ae->duration = duration;
+    ae->delay = delay;
+    ae->delay_up_to_timestamp = when + delay;
+
+    ae->flags |= flags;
+
+    if(ae->old_status == RRDCALC_STATUS_WARNING || ae->old_status == RRDCALC_STATUS_CRITICAL)
+        ae->non_clear_duration += ae->duration;
+
+    // link it
+    netdata_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
+    ae->next = host->health_log.alarms;
+    host->health_log.alarms = ae;
+    host->health_log.count++;
+    netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+
+    // match previous alarms
+    netdata_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;
+        }
+    }
+    netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+
+    health_alarm_log_save(host, ae);
+}
+
+inline void health_alarm_log_free_one_nochecks_nounlink(ALARM_ENTRY *ae) {
+    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->old_value_string);
+    freez(ae->new_value_string);
+    freez(ae);
+}
+
+inline void health_alarm_log_free(RRDHOST *host) {
+    rrdhost_check_wrlock(host);
+
+    netdata_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
+
+    ALARM_ENTRY *ae;
+    while((ae = host->health_log.alarms)) {
+        host->health_log.alarms = ae->next;
+        health_alarm_log_free_one_nochecks_nounlink(ae);
+    }
+
+    netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+}