allow disabling netdata monitoring section of the dashboard (#13788)

* allow disabling netdata monitoring section of the dashboard

* disable-netdata-stats: Modify eBPF.plugin to disable statistic charts according user selection, by default it is enabled

* Don't send internal statistics for exporting engine if it's disabled.

* Fix global statistics flag initialization

* Don't send internal statistics for checks plugin if it's disabled.

Co-authored-by: Thiago Marques <thiagoftsm@gmail.com>
Co-authored-by: Vladimir Kobal <vlad@prokk.net>

6 files changed, 66 insertions, 7 deletions

diff --git a/daemon/global_statistics.c b/daemon/global_statistics.c
index 79e0bb7711..62997cb785 100644
--- a/daemon/global_statistics.c
+++ b/daemon/global_statistics.c
@@ -17,6 +17,8 @@
 #error WORKER_UTILIZATION_MAX_JOB_TYPES has to be at least 5
 #endif
 
+bool global_statistics_enabled = true;
+
 static struct global_statistics {
     volatile uint16_t connected_clients;
 
diff --git a/daemon/global_statistics.h b/daemon/global_statistics.h
index a54610b0ed..1ccc02e716 100644
--- a/daemon/global_statistics.h
+++ b/daemon/global_statistics.h
@@ -21,4 +21,6 @@ void finished_web_request_statistics(uint64_t dt,
 uint64_t web_client_connected(void);
 void web_client_disconnected(void);
 
+extern bool global_statistics_enabled;
+
 #endif /* NETDATA_GLOBAL_STATISTICS_H */
diff --git a/daemon/main.c b/daemon/main.c
index ddbec32408..df93bfa25b 100644
--- a/daemon/main.c
+++ b/daemon/main.c
@@ -1421,8 +1421,13 @@ int main(int argc, char **argv) {
 
             if(st->enabled && st->init_routine)
                 st->init_routine();
-        }
 
+            if(st->env_name)
+                setenv(st->env_name, st->enabled?"YES":"NO", 1);
+
+            if(st->global_variable)
+                *st->global_variable = (st->enabled) ? true : false;
+        }
 
         // --------------------------------------------------------------------
         // create the listening sockets
diff --git a/daemon/static_threads.c b/daemon/static_threads.c
index 2575bd4ca6..1e319cf59e 100644
--- a/daemon/static_threads.c
+++ b/daemon/static_threads.c
@@ -13,6 +13,8 @@ extern void *service_main(void *ptr);
 extern void *statsd_main(void *ptr);
 extern void *timex_main(void *ptr);
 
+extern bool global_statistics_enabled;
+
 const struct netdata_static_thread static_threads_common[] = {
     {
         .name = "PLUGIN[timex]",
@@ -52,8 +54,10 @@ const struct netdata_static_thread static_threads_common[] = {
     },
     {
         .name = "GLOBAL_STATS",
-        .config_section = NULL,
-        .config_name = NULL,
+        .config_section = CONFIG_SECTION_PLUGINS,
+        .config_name = "netdata monitoring",
+        .env_name = "NETDATA_INTERNALS_MONITORING",
+        .global_variable = &global_statistics_enabled,
         .enabled = 1,
         .thread = NULL,
         .init_routine = NULL,
@@ -145,7 +149,17 @@ const struct netdata_static_thread static_threads_common[] = {
         .start_routine = rrdcontext_main
     },
 
-    {NULL, NULL, NULL, 0, NULL, NULL, NULL}
+    // terminator
+    {
+        .name = NULL,
+        .config_section = NULL,
+        .config_name = NULL,
+        .env_name = NULL,
+        .enabled = 0,
+        .thread = NULL,
+        .init_routine = NULL,
+        .start_routine = NULL
+    }
 };
 
 struct netdata_static_thread *
diff --git a/daemon/static_threads.h b/daemon/static_threads.h
index dac615e76d..9597da7047 100644
--- a/daemon/static_threads.h
+++ b/daemon/static_threads.h
@@ -26,6 +26,12 @@ struct netdata_static_thread {
 
     // the threaded worker
     void *(*start_routine) (void *);
+
+    // the environment variable to create
+    char *env_name;
+
+    // global variable
+    bool *global_variable;
 };
 
 #define NETDATA_MAIN_THREAD_RUNNING     CONFIG_BOOLEAN_YES
diff --git a/daemon/static_threads_linux.c b/daemon/static_threads_linux.c
index 5f7a67768e..260b2c176a 100644
--- a/daemon/static_threads_linux.c
+++ b/daemon/static_threads_linux.c
@@ -46,15 +46,45 @@ const struct netdata_static_thread static_threads_linux[] = {
         .start_routine = cgroups_main
     },
 
-    {NULL, NULL, NULL, 0, NULL, NULL, NULL}
+    // terminator
+    {
+        .name = NULL,
+        .config_section = NULL,
+        .config_name = NULL,
+        .env_name = NULL,
+        .enabled = 0,
+        .thread = NULL,
+        .init_routine = NULL,
+        .start_routine = NULL
+    }
 };
 
 const struct netdata_static_thread static_threads_freebsd[] = {
-    {NULL, NULL, NULL, 0, NULL, NULL, NULL}
+    // terminator
+    {
+        .name = NULL,
+        .config_section = NULL,
+        .config_name = NULL,
+        .env_name = NULL,
+        .enabled = 0,
+        .thread = NULL,
+        .init_routine = NULL,
+        .start_routine = NULL
+    }
 };
 
 const struct netdata_static_thread static_threads_macos[] = {
-    {NULL, NULL, NULL, 0, NULL, NULL, NULL}
+    // terminator
+    {
+        .name = NULL,
+        .config_section = NULL,
+        .config_name = NULL,
+        .env_name = NULL,
+        .enabled = 0,
+        .thread = NULL,
+        .init_routine = NULL,
+        .start_routine = NULL
+    }
 };
 
 struct netdata_static_thread *static_threads_get() {