diff options
Diffstat (limited to 'src/health.c')
| -rw-r--r-- | src/health.c | 2194 |
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; +} |