Merge pull request #1483 from Ashiroq/docs-monitoring

Document list of exposed metrics

site/monitoring.md

@@ -11,5 +11,13 @@ available from the endpoints themselves.
 
 The following metrics are exposed:
 
-* Duration of connection to fluxsvc
-* Cluster request latencies
+| metric                                | description                             |
+|---------------------------------------|-----------------------------------------|
+| `flux_cache_request_duration_seconds` | Duration of cache requests, in seconds. |
+| `flux_client_fetch_duration_seconds`  | Duration of remote image metadata requests |
+| `flux_daemon_job_duration_seconds`    | Duration of job execution, in seconds |
+| `flux_daemon_queue_duration_seconds`  | Duration of time spent in the job queue before execution |
+| `flux_daemon_queue_length_count`      | Count of jobs waiting in the queue to be run |
+| `flux_daemon_sync_duration_seconds`   | Duration of git-to-cluster synchronisation |
+| `flux_registry_fetch_duration_seconds` | Duration of image metadata requests (from cache) |
+| `flux_fluxd_connection_duration_seconds` | Duration in seconds of the current connection to fluxsvc |