Send chart context with alert events to the cloud (#13409)

* add chart context to alert events

* migrate health log tables to add chart_context

* send it via proto message

* add from v3 to v4

* free table

* free chart_context

4 files changed, 15 insertions, 7 deletions

diff --git a/health/health.c b/health/health.c
index 01ab6b918a..9eb36a9c60 100644
--- a/health/health.c
+++ b/health/health.c
@@ -853,7 +853,7 @@ void *health_main(void *ptr) {
                         worker_is_busy(WORKER_HEALTH_JOB_ALARM_LOG_ENTRY);
                         time_t now = now_realtime_sec();
                         ALARM_ENTRY *ae = health_create_alarm_entry(
-                            host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id,
+                            host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id, rc->rrdset->context,
                             rc->rrdset->family, rc->classification, rc->component, rc->type, rc->exec, rc->recipient, now - rc->last_status_change,
                             rc->value, NAN, rc->status, RRDCALC_STATUS_REMOVED, rc->source, rc->units, rc->info, 0, 0);
                         if (ae) {
@@ -1113,7 +1113,7 @@ void *health_main(void *ptr) {
 
 
                         ALARM_ENTRY *ae = health_create_alarm_entry(
-                                host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id,
+                                host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id, rc->rrdset->context,
                                 rc->rrdset->family, rc->classification, rc->component, rc->type, rc->exec, rc->recipient, now - rc->last_status_change,
                                 rc->old_value, rc->value, rc->status, status, rc->source, rc->units, rc->info,
                                 rc->delay_last,
@@ -1165,7 +1165,7 @@ void *health_main(void *ptr) {
                         rc->last_repeat = now;
                         if (likely(rc->times_repeat < UINT32_MAX)) rc->times_repeat++;
                         ALARM_ENTRY *ae = health_create_alarm_entry(
-                                host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id,
+                                host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id, rc->rrdset->context,
                                 rc->rrdset->family, rc->classification, rc->component, rc->type, rc->exec, rc->recipient, now - rc->last_status_change,
                                 rc->old_value, rc->value, rc->old_status, rc->status, rc->source, rc->units, rc->info,
                                 rc->delay_last,
diff --git a/health/health.h b/health/health.h
index ef474e70bb..3e77c12a70 100644
--- a/health/health.h
+++ b/health/health.h
@@ -56,6 +56,7 @@ extern ALARM_ENTRY* health_create_alarm_entry(
         time_t when,
         const char *name,
         const char *chart,
+        const char *chart_context,
         const char *family,
         const char *classification,
         const char *component,
@@ -63,8 +64,8 @@ extern ALARM_ENTRY* health_create_alarm_entry(
         const char *exec,
         const char *recipient,
         time_t duration,
-    NETDATA_DOUBLE old_value,
-    NETDATA_DOUBLE new_value,
+        NETDATA_DOUBLE old_value,
+        NETDATA_DOUBLE new_value,
         RRDCALC_STATUS old_status,
         RRDCALC_STATUS new_status,
         const char *source,
diff --git a/health/health_json.c b/health/health_json.c
index d5285c11e7..4e8f437613 100644
--- a/health/health_json.c
+++ b/health/health_json.c
@@ -29,6 +29,7 @@ void health_alarm_entry2json_nolock(BUFFER *wb, ALARM_ENTRY *ae, RRDHOST *host)
                     "\t\t\"config_hash_id\": \"%s\",\n"
                     "\t\t\"name\": \"%s\",\n"
                     "\t\t\"chart\": \"%s\",\n"
+                    "\t\t\"context\": \"%s\",\n"
                     "\t\t\"family\": \"%s\",\n"
                     "\t\t\"class\": \"%s\",\n"
                     "\t\t\"component\": \"%s\",\n"
@@ -65,6 +66,7 @@ void health_alarm_entry2json_nolock(BUFFER *wb, ALARM_ENTRY *ae, RRDHOST *host)
                    , config_hash_id
                    , ae->name
                    , ae->chart
+                   , ae->chart_context
                    , ae->family
                    , ae->classification?ae->classification:"Unknown"
                    , ae->component?ae->component:"Unknown"
diff --git a/health/health_log.c b/health/health_log.c
index 7a4e12688a..f0a05531d3 100644
--- a/health/health_log.c
+++ b/health/health_log.c
@@ -450,6 +450,7 @@ inline ALARM_ENTRY* health_create_alarm_entry(
         time_t when,
         const char *name,
         const char *chart,
+        const char *chart_context,
         const char *family,
         const char *class,
         const char *component,
@@ -457,8 +458,8 @@ inline ALARM_ENTRY* health_create_alarm_entry(
         const char *exec,
         const char *recipient,
         time_t duration,
-    NETDATA_DOUBLE old_value,
-    NETDATA_DOUBLE new_value,
+        NETDATA_DOUBLE old_value,
+        NETDATA_DOUBLE new_value,
         RRDCALC_STATUS old_status,
         RRDCALC_STATUS new_status,
         const char *source,
@@ -478,6 +479,9 @@ inline ALARM_ENTRY* health_create_alarm_entry(
         ae->hash_chart = simple_hash(ae->chart);
     }
 
+    if(chart_context)
+        ae->chart_context = strdupz(chart_context);
+
     uuid_copy(ae->config_hash_id, *((uuid_t *) config_hash_id));
 
     if(family)
@@ -583,6 +587,7 @@ inline void health_alarm_log(
 inline void health_alarm_log_free_one_nochecks_nounlink(ALARM_ENTRY *ae) {
     freez(ae->name);
     freez(ae->chart);
+    freez(ae->chart_context);
     freez(ae->family);
     freez(ae->classification);
     freez(ae->component);