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-rw-r--r--src/health.c2194
1 files changed, 2194 insertions, 0 deletions
diff --git a/src/health.c b/src/health.c
new file mode 100644
index 000000000..3156cd080
--- /dev/null
+++ b/src/health.c
@@ -0,0 +1,2194 @@
+#include "common.h"
+
+#define RRDVAR_MAX_LENGTH 1024
+
+static const char *health_default_exec = PLUGINS_DIR "/alarm-email.sh";
+int health_enabled = 1;
+
+// ----------------------------------------------------------------------------
+// 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)
+ rrdvar_index_del(tree, rv);
+
+ freez(rv->name);
+ freez(rv);
+}
+
+static inline RRDVAR *rrdvar_create_and_index(const char *scope, avl_tree_lock *tree, const char *name, int type, calculated_number *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 {
+ // already exists
+ freez(variable);
+ rv = NULL;
+ }
+
+ return rv;
+}
+
+// ----------------------------------------------------------------------------
+// RRDVAR lookup
+
+calculated_number rrdvar2number(RRDVAR *rv) {
+ switch(rv->type) {
+ 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;
+ }
+}
+
+void dump_variable(void *data) {
+ RRDVAR *rv = (RRDVAR *)data;
+ debug(D_HEALTH, "%50s : %20.5Lf", rv->name, rrdvar2number(rv));
+}
+
+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;
+ }
+
+ debug(D_HEALTH, "Available local chart '%s' variables:", st->id);
+ avl_traverse_lock(&st->variables_root_index, dump_variable);
+
+ debug(D_HEALTH, "Available family '%s' variables:", st->rrdfamily->family);
+ avl_traverse_lock(&st->rrdfamily->variables_root_index, dump_variable);
+
+ debug(D_HEALTH, "Available host '%s' variables:", st->rrdhost->hostname);
+ avl_traverse_lock(&st->rrdhost->variables_root_index, dump_variable);
+
+ return 0;
+}
+
+// ----------------------------------------------------------------------------
+// RRDSETVAR management
+
+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));
+
+ char buffer[RRDVAR_MAX_LENGTH + 1];
+ snprintfz(buffer, RRDVAR_MAX_LENGTH, "%s.%s", st->id, variable);
+ rs->fullid = strdupz(buffer);
+
+ snprintfz(buffer, RRDVAR_MAX_LENGTH, "%s.%s", st->name, variable);
+ rs->fullname = strdupz(buffer);
+
+ rs->variable = strdupz(variable);
+
+ rs->type = type;
+ rs->value = value;
+ rs->options = options;
+ rs->rrdset = st;
+
+ rs->local = rrdvar_create_and_index("local", &st->variables_root_index, rs->variable, rs->type, rs->value);
+ rs->family = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->fullid, rs->type, rs->value);
+ rs->host = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->fullid, rs->type, rs->value);
+ rs->family_name = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->fullname, rs->type, rs->value);
+ rs->host_name = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->fullname, rs->type, rs->value);
+
+ rs->next = st->variables;
+ st->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);
+
+ // only these 2 can change name
+ // rs->family_name
+ // rs->host_name
+
+ char buffer[RRDVAR_MAX_LENGTH + 1];
+ RRDSETVAR *rs, *next = st->variables;
+ while((rs = next)) {
+ next = rs->next;
+
+ snprintfz(buffer, RRDVAR_MAX_LENGTH, "%s.%s", st->name, rs->variable);
+
+ if (strcmp(buffer, rs->fullname)) {
+ // name changed
+ rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->family_name);
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_name);
+
+ freez(rs->fullname);
+ rs->fullname = strdupz(st->name);
+ rs->family_name = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->fullname, rs->type, rs->value);
+ rs->host_name = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->fullname, rs->type, rs->value);
+ }
+ }
+
+ 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);
+
+ rrdvar_free(st->rrdhost, &st->variables_root_index, rs->local);
+ rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->family);
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host);
+ rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->family_name);
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_name);
+
+ 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->fullname, st->id);
+ else t->next = rs->next;
+ }
+
+ freez(rs->fullid);
+ freez(rs->fullname);
+ freez(rs->variable);
+ freez(rs);
+}
+
+// ----------------------------------------------------------------------------
+// RRDDIMVAR management
+
+#define RRDDIMVAR_ID_MAX 1024
+
+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 = "";
+
+ char buffer[RRDDIMVAR_ID_MAX + 1];
+ RRDDIMVAR *rs = (RRDDIMVAR *)callocz(1, sizeof(RRDDIMVAR));
+
+ rs->prefix = strdupz(prefix);
+ rs->suffix = strdupz(suffix);
+
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s%s%s", rs->prefix, rd->id, rs->suffix);
+ rs->id = strdupz(buffer);
+
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s%s%s", rs->prefix, rd->name, rs->suffix);
+ rs->name = strdupz(buffer);
+
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", rd->rrdset->id, rs->id);
+ rs->fullidid = strdupz(buffer);
+
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", rd->rrdset->id, rs->name);
+ rs->fullidname = strdupz(buffer);
+
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", rd->rrdset->name, rs->id);
+ rs->fullnameid = strdupz(buffer);
+
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", rd->rrdset->name, rs->name);
+ rs->fullnamename = strdupz(buffer);
+
+ rs->type = type;
+ rs->value = value;
+ rs->options = options;
+ rs->rrddim = rd;
+
+ rs->local_id = rrdvar_create_and_index("local", &st->variables_root_index, rs->id, rs->type, rs->value);
+ rs->local_name = rrdvar_create_and_index("local", &st->variables_root_index, rs->name, rs->type, rs->value);
+
+ rs->family_id = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->id, rs->type, rs->value);
+ rs->family_name = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index, rs->name, rs->type, rs->value);
+
+ rs->host_fullidid = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->fullidid, rs->type, rs->value);
+ rs->host_fullidname = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->fullidname, rs->type, rs->value);
+ rs->host_fullnameid = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->fullnameid, rs->type, rs->value);
+ rs->host_fullnamename = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, rs->fullnamename, rs->type, rs->value);
+
+ rs->next = rd->variables;
+ rd->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;
+
+ if (strcmp(rd->name, rs->name)) {
+ char buffer[RRDDIMVAR_ID_MAX + 1];
+ // name changed
+
+ // name
+ rrdvar_free(st->rrdhost, &st->variables_root_index, rs->local_name);
+ freez(rs->name);
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s%s%s", rs->prefix, rd->name, rs->suffix);
+ rs->name = strdupz(buffer);
+ rs->local_name = rrdvar_create_and_index("local", &st->variables_root_index, rs->name, rs->type, rs->value);
+
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_fullidname);
+ freez(rs->fullidname);
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->id, rs->name);
+ rs->fullidname = strdupz(buffer);
+ rs->host_fullidname = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index,
+ rs->fullidname, rs->type, rs->value);
+
+ // fullnameid
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_fullnameid);
+ freez(rs->fullnameid);
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->name, rs->id);
+ rs->fullnameid = strdupz(buffer);
+ rs->host_fullnameid = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index,
+ rs->fullnameid, rs->type, rs->value);
+
+ // fullnamename
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_fullnamename);
+ freez(rs->fullnamename);
+ snprintfz(buffer, RRDDIMVAR_ID_MAX, "%s.%s", st->name, rs->name);
+ rs->fullnamename = strdupz(buffer);
+ rs->host_fullnamename = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index,
+ rs->fullnamename, rs->type, rs->value);
+ }
+ }
+}
+
+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);
+
+ rrdvar_free(st->rrdhost, &st->variables_root_index, rs->local_id);
+ rrdvar_free(st->rrdhost, &st->variables_root_index, rs->local_name);
+
+ rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->family_id);
+ rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->family_name);
+
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_fullidid);
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_fullidname);
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_fullnameid);
+ rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->host_fullnamename);
+
+ 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->name, st->id, rd->id);
+ else t->next = rs->next;
+ }
+
+ freez(rs->prefix);
+ freez(rs->suffix);
+ freez(rs->id);
+ freez(rs->name);
+ freez(rs->fullidid);
+ freez(rs->fullidname);
+ freez(rs->fullnameid);
+ freez(rs->fullnamename);
+ freez(rs);
+}
+
+// ----------------------------------------------------------------------------
+// RRDCALC management
+
+static inline const char *rrdcalc_status2string(int status) {
+ switch(status) {
+ case RRDCALC_STATUS_UNINITIALIZED:
+ return "UNINITIALIZED";
+
+ case RRDCALC_STATUS_UNDEFINED:
+ return "UNDEFINED";
+
+ 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:
+ 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 = time(NULL);
+ rc->rrdset = st;
+
+ rc->rrdset_next = st->alarms;
+ rc->rrdset_prev = NULL;
+ 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);
+}
+
+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(rc->rrdset) continue;
+
+ if(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) {
+ error("Requested to unlink RRDCALC '%s.%s' which is not linked to any RRDSET", rc->chart?rc->chart:"NOCHART", rc->name);
+ return;
+ }
+
+ 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(rc->hash == hash && !strcmp(rc->name, name))
+ return rc;
+ }
+
+ return NULL;
+}
+
+static inline int rrdcalc_exists(RRDHOST *host, const char *name, uint32_t hash) {
+ RRDCALC *rc;
+
+ // make sure it does not already exist
+ for(rc = host->alarms; rc ; rc = rc->next) {
+ if (rc->hash == hash && !strcmp(name, rc->name)) {
+ error("Health alarm '%s' already exists in host '%s'.", name, host->hostname);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static inline void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc) {
+ rrdhost_check_rdlock(host);
+
+ if(rc->calculation) {
+ 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->this = &rc->value;
+ rc->warning->after = &rc->db_after;
+ rc->warning->before = &rc->db_before;
+ rc->warning->rrdcalc = rc;
+ }
+
+ if(rc->critical) {
+ 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
+ rc->next = host->alarms;
+ 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 uint32_t rrdcalc_fullname(char *fullname, size_t len, const char *chart, const char *name) {
+ snprintfz(fullname, len - 1, "%s%s%s", chart?chart:"", chart?".":"", name);
+ rrdvar_fix_name(fullname);
+ return simple_hash(fullname);
+}
+
+static inline RRDCALC *rrdcalc_create(RRDHOST *host, const char *name, const char *chart, const char *dimensions,
+ const char *units, const char *info,
+ int group_method, int after, int before, int update_every, uint32_t options,
+ calculated_number green, calculated_number red,
+ const char *exec, const char *source,
+ const char *calc, const char *warn, const char *crit) {
+
+ char fullname[RRDVAR_MAX_LENGTH + 1];
+ uint32_t hash = rrdcalc_fullname(fullname, RRDVAR_MAX_LENGTH + 1, chart, name);
+
+ if(rrdcalc_exists(host, fullname, hash))
+ return NULL;
+
+ RRDCALC *rc = callocz(1, sizeof(RRDCALC));
+
+ rc->name = strdupz(name);
+ rc->hash = simple_hash(rc->name);
+
+ rc->chart = strdupz(chart);
+ rc->hash_chart = simple_hash(rc->chart);
+
+ if(dimensions) rc->dimensions = strdupz(dimensions);
+
+ rc->green = green;
+ rc->red = red;
+ rc->value = NAN;
+ rc->old_value = NAN;
+
+ rc->group = group_method;
+ rc->after = after;
+ rc->before = before;
+ rc->update_every = update_every;
+ rc->options = options;
+
+ if(exec) rc->exec = strdupz(exec);
+ if(source) rc->source = strdupz(source);
+ if(units) rc->units = strdupz(units);
+ if(info) rc->info = strdupz(info);
+
+ if(calc) {
+ rc->calculation = expression_parse(calc, NULL, NULL);
+ if(!rc->calculation)
+ error("Health alarm '%s.%s': failed to parse calculation expression '%s'", chart, name, calc);
+ }
+ if(warn) {
+ rc->warning = expression_parse(warn, NULL, NULL);
+ if(!rc->warning)
+ error("Health alarm '%s.%s': failed to re-parse warning expression '%s'", chart, name, warn);
+ }
+ if(crit) {
+ rc->critical = expression_parse(crit, NULL, NULL);
+ if(!rc->critical)
+ error("Health alarm '%s.%s': failed to re-parse critical expression '%s'", chart, name, crit);
+ }
+
+ debug(D_HEALTH, "Health runtime added alarm '%s.%s': exec '%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",
+ (rc->chart)?rc->chart:"NOCHART",
+ rc->name,
+ (rc->exec)?rc->exec:"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
+ );
+
+ 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(rc == host->alarms)
+ host->alarms = rc->next;
+
+ else if(host->alarms) {
+ RRDCALC *t, *last = host->alarms;
+
+ for(t = last->next; t && t != rc; last = t, t = t->next) ;
+ if(last && 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->source);
+ freez(rc->units);
+ freez(rc->info);
+ freez(rc);
+}
+
+// ----------------------------------------------------------------------------
+// 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)) {
+
+ RRDCALC *rc = rrdcalc_create(st->rrdhost, rt->name, st->id,
+ rt->dimensions, rt->units, rt->info, rt->group, rt->after, rt->before, rt->update_every, rt->options,
+ rt->green, rt->red, rt->exec, rt->source,
+ (rt->calculation)?rt->calculation->source:NULL,
+ (rt->warning)?rt->warning->source:NULL,
+ (rt->critical)?rt->critical->source:NULL);
+
+ if(!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);
+#else
+ (void)rc;
+#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->name);
+ freez(rt->exec);
+ 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_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_UNITS_KEY "units"
+#define HEALTH_INFO_KEY "info"
+
+static inline int rrdcalc_add_alarm_from_config(RRDHOST *host, RRDCALC *rc) {
+ {
+ char fullname[RRDVAR_MAX_LENGTH + 1];
+ uint32_t hash = rrdcalc_fullname(fullname, RRDVAR_MAX_LENGTH + 1, rc->chart, rc->name);
+
+ if (rrdcalc_exists(host, fullname, hash))
+ return 0;
+ }
+
+ if(!rc->chart) {
+ error("Health configuration for alarm '%s' does not have a chart", rc->name);
+ return 0;
+ }
+
+ 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;
+ }
+
+ debug(D_HEALTH, "Health configuration adding alarm '%s.%s': exec '%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",
+ rc->chart?rc->chart:"NOCHART",
+ rc->name,
+ (rc->exec)?rc->exec:"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
+ );
+
+ rrdcalc_create_part2(host, rc);
+ return 1;
+}
+
+static inline int rrdcalctemplate_add_template_from_config(RRDHOST *host, RRDCALCTEMPLATE *rt) {
+ if(!rt->context) {
+ error("Health configuration for template '%s' does not have a context", rt->name);
+ return 0;
+ }
+
+ if(!rt->update_every) {
+ error("Health configuration for template '%s' has no frequency (parameter 'every'). Ignoring it.", rt->name);
+ return 0;
+ }
+
+ if(!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;
+ for (t = host->templates; t ; t = t->next) {
+ if(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', 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'",
+ rt->name,
+ (rt->context)?rt->context:"NONE",
+ (rt->exec)?rt->exec:"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->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_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 *health_source_file(size_t line, const char *path, const char *filename) {
+ 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_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;
+ 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_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);
+ }
+
+ 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++;
+ // info("Line %zu of file '%s/%s': '%s'", line, path, filename, s);
+ s = trim(buffer);
+ if(!s) continue;
+ // info("Trimmed line %zu of file '%s/%s': '%s'", line, path, filename, s);
+
+ 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;
+ }
+
+ // info("Health file '%s/%s', key '%s', value '%s'", path, filename, key, value);
+ 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->name = 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;
+
+ 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 = strdupz(value);
+ rt->hash_name = simple_hash(rt->name);
+ rt->source = health_source_file(line, path, filename);
+ rt->green = NAN;
+ rt->red = NAN;
+
+ 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))
+ info("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 = 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))
+ info("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) {
+ info("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) {
+ info("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))
+ info("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 = strdupz(value);
+ }
+ else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
+ if(rc->units) {
+ if(strcmp(rc->units, value))
+ info("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 = strdupz(value);
+ strip_quotes(rc->units);
+ }
+ else if(hash == hash_info && !strcasecmp(key, HEALTH_INFO_KEY)) {
+ if(rc->info) {
+ if(strcmp(rc->info, value))
+ info("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 = strdupz(value);
+ strip_quotes(rc->info);
+ }
+ 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))
+ info("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 = strdupz(value);
+ rt->hash_context = simple_hash(rt->context);
+ }
+ 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))
+ info("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) {
+ info("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) {
+ info("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))
+ info("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 = strdupz(value);
+ }
+ else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
+ if(rt->units) {
+ if(strcmp(rt->units, value))
+ info("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 = strdupz(value);
+ strip_quotes(rt->units);
+ }
+ else if(hash == hash_info && !strcasecmp(key, HEALTH_INFO_KEY)) {
+ if(rt->info) {
+ if(strcmp(rt->info, value))
+ info("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 = strdupz(value);
+ strip_quotes(rt->info);
+ }
+ 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')
+ ))
+ 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) &&
+ len > 5 && !strcmp(&de->d_name[len - 5], ".conf")) {
+ health_readfile(path, 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);
+}
+
+void health_init(void) {
+ debug(D_HEALTH, "Health configuration initializing");
+
+ if(!(health_enabled = config_get_boolean("health", "enabled", 1))) {
+ debug(D_HEALTH, "Health is disabled.");
+ return;
+ }
+
+ char *path = health_config_dir();
+
+ {
+ char buffer[FILENAME_MAX + 1];
+ snprintfz(buffer, FILENAME_MAX, "%s/alarm-email.sh", config_get("global", "plugins directory", PLUGINS_DIR));
+ 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 < 2) {
+ 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) {
+ buffer_sprintf(wb, "\n\t{\n"
+ "\t\t\"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\":%s,\n"
+ "\t\t\"exec_failed\":%s,\n"
+ "\t\t\"exec\":\"%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",
+ ae->id,
+ ae->name,
+ ae->chart,
+ ae->family,
+ (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_PROCESSED)?"true":"false",
+ (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED)?"true":"false",
+ (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_EXEC_RUN)?"true":"false",
+ (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_EXEC_FAILED)?"true":"false",
+ ae->exec?ae->exec:health_default_exec,
+ 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)
+ );
+
+ 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) {
+ 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(likely(count)) buffer_strcat(wb, ",");
+ health_alarm_entry2json_nolock(wb, ae);
+ }
+
+ 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\"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\"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"
+ , rc->chart, rc->name
+ , rc->name
+ , rc->chart
+ , (rc->rrdset && rc->rrdset->family)?rc->rrdset->family:""
+ , (rc->rrdset)?"true":"false"
+ , rc->exec?rc->exec:health_default_exec
+ , 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
+ );
+
+ 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_strcat(wb, "{\n\t\"alarms\": {\n");
+ RRDCALC *rc;
+ for(i = 0, rc = host->alarms; rc ; rc = rc->next) {
+ if(!rc->rrdset)
+ continue;
+
+ if(!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);
+
+ buffer_sprintf(wb, "\n\t},\n\t\"now\": %lu\n}\n", (unsigned long)time(NULL));
+ rrdhost_unlock(&localhost);
+}
+
+
+// ----------------------------------------------------------------------------
+// re-load health configuration
+
+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();
+
+ rrdhost_rwlock(&localhost);
+ health_free_all_nolock(&localhost);
+ rrdhost_unlock(&localhost);
+
+ RRDSET *st;
+ for(st = localhost.rrdset_root; st ; st = st->next) {
+ st->green = NAN;
+ st->red = NAN;
+ }
+
+ rrdhost_rwlock(&localhost);
+ health_readdir(path);
+ rrdhost_unlock(&localhost);
+
+ for(st = localhost.rrdset_root; st ; st = st->next) {
+ rrdhost_rwlock(&localhost);
+
+ rrdsetcalc_link_matching(st);
+ rrdcalctemplate_link_matching(st);
+
+ rrdhost_unlock(&localhost);
+ }
+}
+
+
+// ----------------------------------------------------------------------------
+// health main thread and friends
+
+static inline int rrdcalc_isrunnable(RRDCALC *rc, time_t now, time_t *next_run) {
+ if (unlikely(!rc->rrdset)) {
+ debug(D_HEALTH, "Health not running alarm '%s.%s'. It is not linked to a chart.", rc->chart?rc->chart:"NOCHART", rc->name);
+ return 0;
+ }
+
+ if (unlikely(!rc->update_every)) {
+ debug(D_HEALTH, "Health not running alarm '%s.%s'. It does not have an update frequency", rc->chart?rc->chart:"NOCHART", rc->name);
+ return 0;
+ }
+
+ if (unlikely(rc->next_update > now)) {
+ if (*next_run > rc->next_update)
+ *next_run = rc->next_update;
+
+ debug(D_HEALTH, "Health not examining alarm '%s.%s' yet (will do in %d secs).", rc->chart?rc->chart:"NOCHART", rc->name, (int) (rc->next_update - now));
+ return 0;
+ }
+
+ return 1;
+}
+
+static inline int rrdcalc_value2status(calculated_number n) {
+ if(isnan(n)) return RRDCALC_STATUS_UNDEFINED;
+ if(n) return RRDCALC_STATUS_RAISED;
+ return RRDCALC_STATUS_CLEAR;
+}
+
+static inline void health_alarm_execute(ALARM_ENTRY *ae) {
+ if(ae->old_status == RRDCALC_STATUS_UNINITIALIZED && ae->new_status == RRDCALC_STATUS_CLEAR)
+ return;
+
+ char buffer[FILENAME_MAX + 1];
+ pid_t command_pid;
+
+ const char *exec = ae->exec;
+ if(!exec) exec = health_default_exec;
+
+ snprintfz(buffer, FILENAME_MAX, "exec %s '%s' '%s' '%s' '%s' '%s' '%0.0Lf' '%0.0Lf' '%s' '%u' '%u' '%s' '%s'",
+ exec,
+ ae->name,
+ ae->chart?ae->chart:"NOCAHRT",
+ ae->family?ae->family:"NOFAMILY",
+ rrdcalc_status2string(ae->new_status),
+ rrdcalc_status2string(ae->old_status),
+ ae->new_value,
+ ae->old_value,
+ ae->source?ae->source:"UNKNOWN",
+ (uint32_t)ae->duration,
+ (uint32_t)ae->non_clear_duration,
+ ae->units?ae->units:"",
+ ae->info?ae->info:""
+ );
+
+ ae->notifications |= HEALTH_ENTRY_NOTIFICATIONS_EXEC_RUN;
+
+ debug(D_HEALTH, "executing command '%s'", buffer);
+ FILE *fp = mypopen(buffer, &command_pid);
+ if(!fp) {
+ error("HEALTH: Cannot popen(\"%s\", \"r\").", buffer);
+ return;
+ }
+ debug(D_HEALTH, "HEALTH reading from command");
+ char *s = fgets(buffer, FILENAME_MAX, fp);
+ (void)s;
+ debug(D_HEALTH, "HEALTH closing command");
+ ae->exec_code = mypclose(fp, command_pid);
+ debug(D_HEALTH, "done executing command - returned with code %d", ae->exec_code);
+
+ if(ae->exec_code != 0)
+ ae->notifications |= HEALTH_ENTRY_NOTIFICATIONS_EXEC_FAILED;
+}
+
+static inline void health_process_notifications(ALARM_ENTRY *ae) {
+ info("Health alarm '%s.%s' = %0.2Lf - changed status from %s to %s",
+ ae->chart?ae->chart:"NOCHART", ae->name,
+ ae->new_value,
+ rrdcalc_status2string(ae->old_status),
+ rrdcalc_status2string(ae->new_status)
+ );
+
+ health_alarm_execute(ae);
+}
+
+static inline void health_alarm_log(RRDHOST *host, time_t when,
+ const char *name, const char *chart, const char *family,
+ const char *exec, 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
+) {
+ 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(source) ae->source = strdupz(source);
+ if(units) ae->units = strdupz(units);
+ if(info) ae->info = strdupz(info);
+
+ ae->id = host->health_log.nextid++;
+ 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;
+
+ 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->hash_name == ae->hash_name &&
+ t->hash_chart == ae->hash_chart &&
+ !strcmp(t->name, ae->name) &&
+ t->chart && ae->chart && !strcmp(t->chart, ae->chart)) {
+
+ if(!(t->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED) && !t->updated_by) {
+ t->notifications |= HEALTH_ENTRY_NOTIFICATIONS_UPDATED;
+ t->updated_by = ae;
+
+ 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;
+ }
+ else {
+ // no need to continue
+ break;
+ }
+ }
+ }
+ pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+}
+
+static inline void health_alarm_log_process(RRDHOST *host) {
+ static uint32_t last_processed = 0;
+ ALARM_ENTRY *ae;
+
+ pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
+
+ for(ae = host->health_log.alarms; ae ;ae = ae->next) {
+ if(last_processed >= ae->id) break;
+
+ if(!(ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_PROCESSED) &&
+ !(ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED)) {
+ ae->notifications |= HEALTH_ENTRY_NOTIFICATIONS_PROCESSED;
+ health_process_notifications(ae);
+ }
+ }
+
+ if(host->health_log.alarms)
+ last_processed = host->health_log.alarms->id;
+
+ pthread_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);
+
+ ALARM_ENTRY *last = NULL;
+ unsigned int count = host->health_log.max;
+ for(ae = host->health_log.alarms; ae && count ; count--, last = ae, ae = ae->next) ;
+
+ if(ae && last && last->next == ae)
+ last->next = NULL;
+ else
+ ae = NULL;
+
+ while(ae) {
+ ALARM_ENTRY *t = ae->next;
+
+ freez(ae->name);
+ freez(ae->chart);
+ freez(ae->family);
+ freez(ae->exec);
+ freez(ae->source);
+ freez(ae->units);
+ freez(ae->info);
+ freez(ae);
+
+ ae = t;
+ }
+
+ pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+}
+
+void *health_main(void *ptr) {
+ (void)ptr;
+
+ info("HEALTH thread created with task id %d", gettid());
+
+ if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
+ error("Cannot set pthread cancel type to DEFERRED.");
+
+ 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);
+ if(min_run_every < 1) min_run_every = 1;
+
+ BUFFER *wb = buffer_create(100);
+
+ unsigned int loop = 0;
+ while(health_enabled) {
+ loop++;
+ debug(D_HEALTH, "Health monitoring iteration no %u started", loop);
+
+ int oldstate, runnable = 0;
+ time_t now = time(NULL);
+ time_t next_run = now + min_run_every;
+ RRDCALC *rc;
+
+ if (unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldstate) != 0))
+ error("Cannot set pthread cancel state to DISABLE.");
+
+ rrdhost_rdlock(&localhost);
+
+ // 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)))
+ continue;
+
+ runnable++;
+ rc->old_value = rc->value;
+
+ // 1. if there is database lookup, do it
+ // 2. if there is calculation expression, run it
+
+ if (unlikely(RRDCALC_HAS_DB_LOOKUP(rc))) {
+ time_t old_db_timestamp = rc->db_before;
+ int value_is_null = 0;
+
+ 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);
+
+ if (unlikely(ret != 200)) {
+ // database lookup failed
+ rc->value = NAN;
+
+ debug(D_HEALTH, "Health alarm '%s.%s': database lookup returned error %d", rc->chart?rc->chart:"NOCHART", rc->name, ret);
+
+ 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);
+ }
+ }
+ else if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_DB_ERROR))
+ rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_ERROR;
+
+ if (unlikely(old_db_timestamp == rc->db_before)) {
+ // database is stale
+
+ debug(D_HEALTH, "Health alarm '%s.%s': database is stale", 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 alarm '%s.%s': database is stale", 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(value_is_null)) {
+ // collected value is null
+
+ rc->value = NAN;
+
+ 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_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);
+ }
+ }
+ 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
+
+ rc->value = NAN;
+
+ debug(D_HEALTH, "Health alarm '%s.%s': failed to evaluate calculation with error: %s",
+ rc->chart?rc->chart:"NOCHART", rc->name, buffer_tostring(rc->calculation->error_msg));
+
+ if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_CALC_ERROR))) {
+ rc->rrdcalc_flags |= RRDCALC_FLAG_CALC_ERROR;
+ error("Health alarm '%s.%s': failed to evaluate calculation with error: %s",
+ rc->chart?rc->chart:"NOCHART", rc->name, buffer_tostring(rc->calculation->error_msg));
+ }
+ }
+ else {
+ if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_CALC_ERROR))
+ rc->rrdcalc_flags &= ~RRDCALC_FLAG_CALC_ERROR;
+
+ debug(D_HEALTH, "Health alarm '%s.%s': calculation expression gave value "
+ CALCULATED_NUMBER_FORMAT
+ ": %s (source: %s)",
+ rc->chart?rc->chart:"NOCHART", rc->name,
+ rc->calculation->result,
+ buffer_tostring(rc->calculation->error_msg),
+ rc->source
+ );
+
+ rc->value = rc->calculation->result;
+ }
+ }
+ }
+ rrdhost_unlock(&localhost);
+
+ if (runnable) {
+ rrdhost_rdlock(&localhost);
+
+ for (rc = localhost.alarms; rc; rc = rc->next) {
+ if (unlikely(!rrdcalc_isrunnable(rc, now, &next_run)))
+ continue;
+
+ int warning_status = RRDCALC_STATUS_UNDEFINED;
+ int critical_status = RRDCALC_STATUS_UNDEFINED;
+
+ if(unlikely(rc->warning)) {
+ if(unlikely(!expression_evaluate(rc->warning))) {
+ // calculation failed
+
+ 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))) {
+ 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));
+ }
+ }
+ else {
+ if(unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_WARN_ERROR))
+ 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);
+ }
+ }
+
+ if(unlikely(rc->critical)) {
+ if(unlikely(!expression_evaluate(rc->critical))) {
+ // calculation failed
+
+ 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))) {
+ 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));
+ }
+ }
+ else {
+ if(unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_CRIT_ERROR))
+ rc->rrdcalc_flags &= ~RRDCALC_FLAG_CRIT_ERROR;
+
+ 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
+ );
+
+ 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;
+ }
+
+ switch(critical_status) {
+ case RRDCALC_STATUS_CLEAR:
+ if(status == RRDCALC_STATUS_UNDEFINED)
+ status = RRDCALC_STATUS_CLEAR;
+ break;
+
+ case RRDCALC_STATUS_RAISED:
+ status = RRDCALC_STATUS_CRITICAL;
+ break;
+
+ default:
+ break;
+ }
+
+ if(status != rc->status) {
+ health_alarm_log(&localhost, time(NULL), rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, now - rc->last_status_change, rc->old_value, rc->value, rc->status, status, rc->source, rc->units, rc->info);
+ rc->last_status_change = now;
+ rc->status = status;
+ }
+
+ rc->last_updated = now;
+ rc->next_update = now + rc->update_every;
+
+ if (next_run > rc->next_update)
+ next_run = rc->next_update;
+ }
+
+ rrdhost_unlock(&localhost);
+ }
+
+ if (unlikely(pthread_setcancelstate(oldstate, NULL) != 0))
+ error("Cannot set pthread cancel state to RESTORE (%d).", oldstate);
+
+ // execute notifications
+ // and cleanup
+ health_alarm_log_process(&localhost);
+
+ now = time(NULL);
+ if(now < next_run) {
+ debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration in %d secs",
+ loop, (int) (next_run - now));
+ sleep_usec(1000000 * (unsigned long long) (next_run - now));
+ }
+ else {
+ debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration now", loop);
+ }
+ }
+
+ buffer_free(wb);
+
+ info("HEALTH thread exiting");
+ pthread_exit(NULL);
+ return NULL;
+}