Provide more agent analytics to posthog (#11020)

* Move statistics related functions to analytics.c

* error message change, space added after if

* start an analytics thread

* use heartbeat instead of sleep

* add late enviroment (after rrdinit) pick of some attributes

* change loop

* re-enable info messages

* remove possible new line

* log and report hits on allmetrics pages. detect if exporting engines are enabled/in use, and report them

* use lowercase for analytics variables

* add collectors

* add buildinfo

* more attributes from late environment

* add new attributes to v1/info

* re-gather meta data before exit. update allmetrics counters to be available in v1/info

* log hits to dashboard

* add mirrored hosts

* added notification methods

* fix spaces, proper JSON naming

* add alerts, charts and metrics count

* more attributes

* keep the thread up, and report a meta event every 2 hours

* small formating changes. Disable analytics_log_prometheus when for unit testing. Add the new attributes to the anonymous-statistics.sh.in script

* applied clang-format

* dont gather data again on exit

* safe buffer length in snprintfz

* add rrdset lock

* remove show_archived

* remove setenv

* calculate lengths during sets

2 files changed, 61 insertions, 0 deletions

diff --git a/exporting/exporting_engine.c b/exporting/exporting_engine.c
index 45de213a82..70aceea8c1 100644
--- a/exporting/exporting_engine.c
+++ b/exporting/exporting_engine.c
@@ -4,6 +4,64 @@
 
 static struct engine *engine = NULL;
 
+void analytics_exporting_connectors(BUFFER *b)
+{
+    if (!engine)
+        return;
+
+    uint8_t count = 0;
+
+    for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
+        if (count)
+            buffer_strcat(b, "|");
+
+        switch (instance->config.type) {
+            case EXPORTING_CONNECTOR_TYPE_GRAPHITE:
+                buffer_strcat(b, "Graphite");
+                break;
+            case EXPORTING_CONNECTOR_TYPE_GRAPHITE_HTTP:
+                buffer_strcat(b, "GraphiteHTTP");
+                break;
+            case EXPORTING_CONNECTOR_TYPE_JSON:
+                buffer_strcat(b, "JSON");
+                break;
+            case EXPORTING_CONNECTOR_TYPE_JSON_HTTP:
+                buffer_strcat(b, "JSONHTTP");
+                break;
+            case EXPORTING_CONNECTOR_TYPE_OPENTSDB:
+                buffer_strcat(b, "OpenTSDB");
+                break;
+            case EXPORTING_CONNECTOR_TYPE_OPENTSDB_HTTP:
+                buffer_strcat(b, "OpenTSDBHTTP");
+                break;
+            case EXPORTING_CONNECTOR_TYPE_PROMETHEUS_REMOTE_WRITE:
+#if ENABLE_PROMETHEUS_REMOTE_WRITE
+                buffer_strcat(b, "PrometheusRemoteWrite");
+#endif
+                break;
+            case EXPORTING_CONNECTOR_TYPE_KINESIS:
+#if HAVE_KINESIS
+                buffer_strcat(b, "Kinesis");
+#endif
+                break;
+            case EXPORTING_CONNECTOR_TYPE_PUBSUB:
+#if ENABLE_EXPORTING_PUBSUB
+                buffer_strcat(b, "Pubsub");
+#endif
+                break;
+            case EXPORTING_CONNECTOR_TYPE_MONGODB:
+#if HAVE_MONGOC
+                buffer_strcat(b, "MongoDB");
+#endif
+                break;
+            default:
+                buffer_strcat(b, "Unknown");
+        }
+
+        count++;
+    }
+}
+
 /**
  * Exporting Clean Engine
  *
diff --git a/exporting/prometheus/prometheus.c b/exporting/prometheus/prometheus.c
index 4222dce568..6759313c33 100644
--- a/exporting/prometheus/prometheus.c
+++ b/exporting/prometheus/prometheus.c
@@ -794,6 +794,9 @@ static inline time_t prometheus_preparation(
     time_t now,
     PROMETHEUS_OUTPUT_OPTIONS output_options)
 {
+#ifndef UNIT_TESTING
+    analytics_log_prometheus();
+#endif
     if (!server || !*server)
         server = "default";