Using LiveKit with Matrix requires two services - LiveKit itself, and a brokering service (`lk-jwt-service`) that grants Matrix users permission to connect to it.
You must generate a key and secret to allow the Matrix service to authenticate with LiveKit. `LK_MATRIX_KEY` should be around 20 random characters, and `LK_MATRIX_SECRET` should be around 64. Remember to replace these with the actual values!
Next, we need to configure LiveKit. In the same directory, create `livekit.yaml` with the following content - remembering to replace `LK_MATRIX_KEY` and `LK_MATRIX_SECRET` with the values you generated:
You will need to allow ports `7881/tcp` and `50100:50200/udp` through your firewall. If you use UFW, the commands are: `ufw allow 7881/tcp` and `ufw allow 50100:50200/udp`.
To tell clients where to find LiveKit, you need to add your `lk-jwt-service`'s address to the `foci` field of the `[global.matrix_rtc]` section of your Continuwuity config file.
The variable should be a list of servers serving as MatrixRTC endpoints. Replace the URL with the address you are deploying your instance of lk-jwt-service to:
All paths should be forwarded to LiveKit by default, with the exception of the following path prefixes, which should be forwarded to the JWT/Authentication service:
To test that LiveKit is successfully integrated with Continuwuity, you will need to replicate its [Token Exchange Flow](https://github.com/element-hq/lk-jwt-service#%EF%B8%8F-how-it-works--token-exchange-flow). Follow the steps below while checking Docker logs (`docker compose logs --follow`), in order to help [troubleshooting](#troubleshooting) any issues.
First, you will need an access token for your current login session. These can be found in your client's settings or obtained via [this website][starstruck-mxtoken2].
Replace `matrix_server_name` and `claimed_user_id` with your information, and `<openid_access_token>` with the one you got from the previous step. Other values can be left as-is.
Use this token to test at the [LiveKit Connection Tester][livekit-connection-test]. If everything works there, then you have set up LiveKit successfully!
To debug any issues, you can place a call or redo the Testing instructions, and check the container logs for any specific errors. Use `docker compose logs --follow` to follow these logs in real-time.
- "Waiting for media" popup always showing for yourself: a LiveKit URL has been configured in Continuwuity, but your client cannot connect to it for some reason
- `OPEN_ID_ERROR`: Your client can reach out to `lk-jwt-service`, but has problems authenticating with it. In this case, check `lk-jwt-service` logs for more details
Some distros do not allow Docker containers in bridge networks to connect to their host's public IP by default. This makes `lk-jwt-service` fail connecting to `livekit` or `continuwuity` on the same host, causing refused and timed out connections to appear in the log entries of the JWT service, even when `LIVEKIT_URL` has been configured correctly.
To resolve this, configure an `extra_hosts` file mapping LiveKit's and Continuwuity's domain names to Docker's custom host loopback address, represented here by `host-gateway`:
After implementing the changes and restarting your compose, `lk-jwt-service` should now connect to your other services. The sidecar container test above should now return an `OK` from LiveKit.
For more information about the `host-gateway` parameter, kindly refer to the `--add-host` documentation for [Docker][docker-add-host] and [Podman][podman-add-host]. Should you have further difficulties, feel free to enquire in the support rooms.
By default, LiveKit automatically finds its public IP address(es), which can be seen in the "Establishing WebRTC connection" section of the connection test page. If these IPs are incorrect, you may want to hardcode your own IP by doing the following:
When deploying on servers with federation disabled (`allow_federation = false`), LiveKit will fail as it can't fetch the required [OpenID endpoint](https://spec.matrix.org/v1.17/server-server-api/#get_matrixfederationv1openiduserinfo) via federation paths.
As a workaround, you can enable federation, but forbid all remote servers via the following config parameters:
```toml
### in your continuwuity.toml file ###
allow_federation = true
forbidden_remote_server_names = [".*"]
```
Subscribe to issue [!1440](https://forgejo.ellis.link/continuwuation/continuwuity/issues/1440) for future updates on this matter.
Most of the time, LiveKit [**does not need TURN**][sspaeth-matrix-voip-turn] to function. However, there are situations where clients may be unable to use nonstandard ports or UDP connections, such as in highly restrictive networks. In such cases, a TURN-over-TLS server on port 443 could relay traffic for the clients.
Recreate the LiveKit container (with `docker compose up -d livekit`) to apply these changes. Remember to allow the new `50300:50400/udp` ports through your firewall.
Then, configure a route from port 443 on the host back to the `livekit-turn.example.com` service on port 5349. To multiplex the service and LiveKit's WebSocket on the same port, use a layer 4 reverse proxy with SNI routing capabilities, such as [Caddy-L4][caddy-l4], on the host system.
Then, generate a long random TURN secret for LiveKit, and add it to your coturn config under the `static-auth-secret` option. coturn allows multiple secrets in its configuration, so set a different one for LiveKit to use.
After that, refer to the following [TURN-over-TLS on 443 instructions](./turn#turn-over-tls-on-443) to set up coturn with TLS, as well as multiplexing with LiveKit's WebSocket on port 443.
Once the services are configured, run the Testing steps again to check that TURN-over-TLS on 443 is working. There should now be a green tick in the [LiveKit connection test page][livekit-connection-test] showing "Can connect to TURN" to confirm this is set up successfully.
