Metrics reference

Stewart serves these metrics at GET /metrics on the admin port, in the Prometheus text format, under the admin token. Status and control explains how to turn the port on and scrape it.

Metric	Type	Labels	Meaning
stewart_app_events_delivered_total	counter	app, worker	Events delivered to the app handlers.
stewart_app_exposed_commands_total	counter		Home Assistant commands on the app’s exposed entities by outcome.
stewart_app_exposed_entities	gauge	app, worker	Home Assistant entities the app exposes, unavailable ones included.
stewart_app_failures_total	counter	app, worker	Handler failures of the app.
stewart_app_info	gauge	app, worker, class	App class per app; always 1.
stewart_app_last_failure_timestamp_seconds	gauge	app, worker	Unix time of the last app failure.
stewart_app_paused	gauge	app, worker	Whether the app is paused; 1 or 0.
stewart_app_publishes_total	counter	app, worker	Messages the app published.
stewart_app_schedule_runs_total	counter	app, worker	Scheduled handler runs.
stewart_app_schedules	gauge	app, worker	Schedules the app holds.
stewart_app_service_call_duration_seconds	histogram	app, worker, outcome	Home Assistant call latency of the app by outcome.
stewart_app_service_calls_total	counter	app, worker, outcome	Home Assistant calls of the app by outcome.
stewart_app_state	gauge	app, worker, state	App lifecycle state; 1 for the current one.
stewart_app_subscription_dropped_total	counter	app, worker	Events dropped because a subscription queue was full.
stewart_app_subscriptions	gauge	app, worker	Subscriptions the app holds.
stewart_app_suppressed_total	counter	app, worker	Work skipped while the app was paused.
stewart_broker_memory_bytes	gauge		Memory the broker process holds.
stewart_build_info	gauge	version, ha_version	Stewart and Home Assistant versions; always 1.
stewart_component_info	gauge	version, protocol	Version and protocol of the stewart Home Assistant integration; always 1.
stewart_component_state	gauge	state	State of the stewart Home Assistant integration; 1 for the current one.
stewart_deploy_failures_total	counter		New commits that failed stewart check and were not deployed.
stewart_deploy_info	gauge	commit	Commit the daemon runs while it polls for new ones; always 1.
stewart_ha_connection_phase	gauge	phase	Home Assistant connection phase; 1 for the current one.
stewart_ha_entities	gauge		Entities in the Home Assistant state cache.
stewart_ha_last_outage_seconds	gauge		Length of the last Home Assistant outage.
stewart_ha_reconnects_total	counter		Home Assistant reconnects since the daemon started.
stewart_routing_cache_hits_total	counter		Routing lookups answered from the cache.
stewart_routing_cache_misses_total	counter		Routing lookups that missed the cache.
stewart_routing_cached_keys	gauge		Routing keys with a cached match.
stewart_routing_patterns	gauge		Wildcard patterns in the broker routing index.
stewart_routing_subscriptions	gauge		Subscriptions in the broker routing index.
stewart_service_calls_in_flight	gauge		Home Assistant calls awaiting an answer.
stewart_service_calls_refused_total	counter		Home Assistant calls refused for lack of a free slot.
stewart_start_time_seconds	gauge		Unix time the daemon started.
stewart_store_available	gauge		Whether workers reach the store; 1 or 0.
stewart_store_last_failure_timestamp_seconds	gauge		Unix time of the last store failure.
stewart_worker_last_pong_timestamp_seconds	gauge	worker	Unix time of the last liveness answer.
stewart_worker_loop_lag_seconds	gauge	worker	Event loop lag the worker last reported.
stewart_worker_memory_bytes	gauge	worker	Memory the worker process last reported.
stewart_worker_missed_probes	gauge	worker	Liveness probes the worker has not answered in a row.
stewart_worker_outbox_coalesced_state_changes_total	counter	worker	State changes merged into a newer one before delivery.
stewart_worker_outbox_dropped_total	counter	worker	Messages dropped because the worker outbox was full.
stewart_worker_outbox_largest_state_batch	gauge	worker	Largest state change batch sent to the worker.
stewart_worker_outbox_queued	gauge	worker	Messages waiting in the outbox to the worker.
stewart_worker_outbox_state_batches_sent_total	counter	worker	State change batches sent to the worker.
stewart_worker_phase	gauge	worker, phase	Worker lifecycle phase; 1 for the current one.
stewart_worker_quarantines_total	counter	worker	Times the worker was quarantined after using up its restart budget.
stewart_worker_ready	gauge	worker	Whether the worker finished booting its apps; 1 or 0.
stewart_worker_restart_due_timestamp_seconds	gauge		Unix time of the next scheduled restart.
stewart_worker_restarts_in_window	gauge	worker	Restarts inside the current restart budget window.
stewart_worker_restarts_total	counter	worker	Restarts scheduled since the daemon started.
stewart_worker_service_calls_in_flight	gauge	worker	Home Assistant calls of this worker awaiting an answer.
stewart_workers	gauge		Worker slots the broker supervises.
stewart_workers_live	gauge		Worker processes currently running.