/api/v2/contexts (#14592)

* preparation for /api/v2/contexts

* working /api/v2/contexts

* add anomaly rate information in all statistics; when sum-count is requested, return sums and counts instead of averages

* minor fix

* query targegt now accurately counts hosts, contexts, instances, dimensions, metrics

* cleanup /api/v2/contexts

* full text search with /api/v2/contexts

* simple patterns now support the option to search ignoring case

* full text search API with /api/v2/q

* simple pattern execution optimization

* do not show q when not given

* full text search accounting

* separated /api/v2/nodes from /api/v2/contexts

* fix ssv queries for group_by

* count query instances queried and failed per context and host

* split rrdcontext.c to multiple files

* add query totals

* fix anomaly rate calculation; provide "ni" for indexing hosts

* do not generate zero valued members

* faster calculation of anomaly rate; by just summing integers for each db points and doing math once for every generated point

* fix typo when printing dimensions totals

* added option minify to remove spaces and newlines fron JSON output

* send instance ids and names when they differ

* do not add in query target dimensions, instances, contexts and hosts for which there is no retention in the current timeframe

* fix for the previous + renames and code cleanup

* when a dimension is filtered, include in the response all the other dimensions that are selectable

* do not add nodes that do not have retention in the current window

* move selection of dimensions to query_dimension_add(), instead of query_metric_add()

* increase the pre-processing capacity of queries

* generate instance fqdn ids and names only when they are needed

* provide detailed statistics about tiers retention, queries, points, update_every

* late allocation of query dimensions

* cleanup

* more cleanup

* support for annotations per displayed point, RESET and PARTIAL

* new type annotations

* if a chart is not linked to contexts and it is collected, link it when it is collected

* make ML run reentrant

* make ML rrdr query synchronous

* optimize replication memory allocation of replication_sort_entry

* change units to percentage, when requesting a coefficinet of variation, or a percentage query

* initialize replication before starting main threads

* properly decrement no room requests counter

* propagate the non-zero flag to group-by

* the same by avoiding the extra loop

* respect non-zero in all dimension arrays

* remove dictionary garbage collection from dictionary_entries() and dictionary_version()

* be more verbose when jv2 indexing is postponed

* prevent infinite loop

* use hidden dimensions even when dimensions pattern is unset

* traverse hosts using dictionaries

* fix dictionary unittests

1 files changed, 7 insertions, 9 deletions

diff --git a/database/rrdcalc.c b/database/rrdcalc.c
index 3063ad0f2b..3ee8719c07 100644
--- a/database/rrdcalc.c
+++ b/database/rrdcalc.c
@@ -359,13 +359,14 @@ static inline bool rrdcalc_check_if_it_matches_rrdset(RRDCALC *rc, RRDSET *st) {
         && (rc->chart != st->name))
         return false;
 
-    if (rc->module_pattern && !simple_pattern_matches(rc->module_pattern, rrdset_module_name(st)))
+    if (rc->module_pattern && !simple_pattern_matches_string(rc->module_pattern, st->module_name))
         return false;
 
-    if (rc->plugin_pattern && !simple_pattern_matches(rc->plugin_pattern, rrdset_plugin_name(st)))
+    if (rc->plugin_pattern && !simple_pattern_matches_string(rc->plugin_pattern, st->module_name))
         return false;
 
-    if (st->rrdhost->rrdlabels && rc->host_labels_pattern && !rrdlabels_match_simple_pattern_parsed(st->rrdhost->rrdlabels, rc->host_labels_pattern, '='))
+    if (st->rrdhost->rrdlabels && rc->host_labels_pattern && !rrdlabels_match_simple_pattern_parsed(
+            st->rrdhost->rrdlabels, rc->host_labels_pattern, '=', NULL))
         return false;
 
     return true;
@@ -741,7 +742,7 @@ void rrdcalc_delete_alerts_not_matching_host_labels_from_this_host(RRDHOST *host
         if (!rc->host_labels)
             continue;
 
-        if(!rrdlabels_match_simple_pattern_parsed(host->rrdlabels, rc->host_labels_pattern, '=')) {
+        if(!rrdlabels_match_simple_pattern_parsed(host->rrdlabels, rc->host_labels_pattern, '=', NULL)) {
             log_health("Health configuration for alarm '%s' cannot be applied, because the host %s does not have the label(s) '%s'",
                  rrdcalc_name(rc),
                  rrdhost_hostname(host),
@@ -754,18 +755,15 @@ void rrdcalc_delete_alerts_not_matching_host_labels_from_this_host(RRDHOST *host
 }
 
 void rrdcalc_delete_alerts_not_matching_host_labels_from_all_hosts() {
-    rrd_rdlock();
-
     RRDHOST *host;
-    rrdhost_foreach_read(host) {
+    dfe_start_reentrant(rrdhost_root_index, host) {
         if (unlikely(!host->health.health_enabled))
             continue;
 
         if (host->rrdlabels)
             rrdcalc_delete_alerts_not_matching_host_labels_from_this_host(host);
     }
-
-    rrd_unlock();
+    dfe_done(host);
 }
 
 void rrdcalc_unlink_all_rrdset_alerts(RRDSET *st) {