Send anonymous statistics from backends and exporting engine (#9125)

backends/backends.c

@@ -697,6 +697,7 @@ void *backends_main(void *ptr) {
     // prepare the backend main loop
 
     info("BACKEND: configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, global_backend_update_every, hostname, global_backend_prefix);
+    send_statistics("BACKEND_START", "OK", type);
 
     usec_t step_ut = global_backend_update_every * USEC_PER_SEC;
     time_t after = now_realtime_sec();

exporting/exporting_engine.c

@@ -84,6 +84,7 @@ void *exporting_main(void *ptr)
 
     if (init_connectors(engine) != 0) {
         error("EXPORTING: cannot initialize exporting connectors");
+        send_statistics("EXPORTING_START", "FAIL", "-");
         goto cleanup;
     }
 

exporting/exporting_engine.h

@@ -59,6 +59,7 @@ struct engine;
 
 struct instance_config {
     EXPORTING_CONNECTOR_TYPE type;
+    const char *type_name;
 
     const char *name;
     const char *destination;

exporting/init_connectors.c

@@ -90,6 +90,8 @@ int init_connectors(struct engine *engine)
         char threadname[NETDATA_THREAD_NAME_MAX + 1];
         snprintfz(threadname, NETDATA_THREAD_NAME_MAX, "EXPORTING-%zu", instance->index);
         uv_thread_set_name_np(instance->thread, threadname);
+
+        send_statistics("EXPORTING_START", "OK", instance->config.type_name);
     }
 
     return 0;

exporting/read_config.c

@@ -336,6 +336,7 @@ struct engine *read_exporting_config()
 
         instance_name = tmp_ci_list->local_ci.instance_name;
 
+        tmp_instance->config.type_name = strdupz(tmp_ci_list->local_ci.connector_name);
         tmp_instance->config.name = strdupz(tmp_ci_list->local_ci.instance_name);