Updating to v0.35.0

Updating to OpenTalk Controller v0.35.0

Signaling metrics are provided by the roomserver

Before v0.34.0, the OpenTalk controller ran signaling in-process and exposed signaling_* metrics on its own /metrics endpoint. v0.34.0 removed the built-in signaling in favor of the RoomServer, and those metrics disappeared from the controller's endpoint. Starting with v0.35.0, the equivalent metrics are emitted by the roomserver and are observable again, but the endpoint that serves them and the set of metric names have changed.

Where to scrape

roomserver.kind	Scrape target for signaling metrics
internal	The controller's /metrics endpoint (unchanged host/port).
external	The roomserver's /metrics endpoint (separate process, default port 11412). The roomserver's own [metrics] allowlist must include your Prometheus host; by default the endpoint refuses all connections.

Metric mapping

The otel_scope_name label on the signaling metrics changes value from ot-controller to ot-roomserver.

Old metric (pre-v0.34.0)	Replacement	Notes
signaling_created_rooms_count	signaling_created_rooms_count	Breakout rooms are now counted separately by signaling_created_breakout_rooms_count.
signaling_destroyed_rooms_count	signaling_destroyed_rooms_count	Breakout rooms are now counted separately by signaling_destroyed_breakout_rooms_count.
signaling_participants_count	signaling_connection_count	Renamed "participants" to "connections". The participation_kind label gains the values recorder, transcription, call_in, and registered_call_in.
signaling_participants_per_room	signaling_connections_per_room	Implemented as a set of gauges keyed by a bucket label (2, 10, 25, 50, 100, 200, 300), not a histogram. Queries using histogram_quantile no longer apply.
signaling_room_life_time	signaling_room_life_time	Bucket boundaries come from the roomserver; re-tune alert thresholds if you had customized them.
signaling_participant_meeting_time	signaling_connection_meeting_time	Renamed. Bucket boundaries come from the roomserver.
signaling_runner_startup_time_seconds	removed	The in-process runner no longer exists.
signaling_runner_destroy_time_seconds	removed	The in-process runner no longer exists.

signaling_participants_with_audio_count and signaling_participants_with_video_count were defined on the old signaling metrics but had no emitters after the Janus Media Server was removed in v0.26.0; they are gone with the rest of the old signaling metrics and have no replacement.

The following metrics are new and have no pre-v0.34.0 equivalent:

Metric	Type	Description
signaling_created_breakout_rooms_count	counter	Number of breakout rooms created. Previously folded into signaling_created_rooms_count; now tracked separately.
signaling_destroyed_breakout_rooms_count	counter	Number of breakout rooms destroyed. Previously folded into signaling_destroyed_rooms_count; now tracked separately.
signaling_congested_connections	counter	Number of connections the roomserver disconnected due to congestion. Useful as an indicator of client- or network-side backpressure.

See the metrics documentation for the full list of metrics currently exposed by the controller.