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getting_started.md

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Running calls through rtcd

Prerequisites

  • An Enterprise licensed Mattermost installation with Calls installed.
  • A working version of Docker installed.

Installation

As first step we fetch the latest official rtcd docker image:

docker pull mattermost/rtcd:latest

Running

To start rtcd we can run the following command:

docker run --name rtcd -e "RTCD_LOGGER_ENABLEFILE=false" -e "RTCD_API_SECURITY_ALLOWSELFREGISTRATION=true" -p 8443:8443/udp -p 8443:8443/tcp -p 8045:8045/tcp mattermost/rtcd

Note

  • By default the service starts even if no configuration file is provided. In such case default values are used. In the example above we are overriding a couple of config settings:
    • logger.enable_file We set this to false to prevent warnings since the process has no permissions to write files. If a log file is needed a volume should be mounted accordingly.
    • api.security.allow_self_registration We set this to true so that clients (Mattermost instances) can automatically self register and authenticate to the service without manually having to create accounts. This is fine as long as the service is running in an internal/private network.
  • We are exposing to the host the two ports the service is listening on:
    • 8443/udp and 8443/tcp are the ports used to route all the calls related media traffic (i.e. voice, screen share). The first one (UDP) is preferred but the latter (TCP) can be used as a fallback.
    • 8045/tcp Is the port used to serve the HTTP/WebSocket internal API to communicate with the Mattermost side (Calls plugin).

Running with config file

Of course it's also possible to provide the service with a complete config file by mounting a volume, e.g.:

docker run --name rtcd -v /path/to/rtcd/config:/config mattermost/rtcd -config /config/config.toml

Verify service is running

Finally, to verify that the service is correctly running we can try calling the HTTP API:

curl http://localhost:8045/version

This should return a JSON object with basic information about the service such as its build version.

Configuration

Configuration for the service is fully documented in-place through the config.sample.toml file.

Running calls

The last step to get calls working through rtcd is to configure the Calls side to use the service. This is done via the Admin Console -> Plugins -> Calls -> RTCD service URL setting, which in this example will be set to http://localhost:8045.

Note

  1. The client will self-register the first time it connects to the service and store the authentication key in the database. If no client ID is explicitly provided, the diagnostic ID of the instance will be used.
  2. The RTCD service URL supports credentials in the form http://clientID:authKey@hostname. Alternitevly these can be passed through environment overrides, namely MM_CALLS_RTCD_CLIENT_ID and MM_CALLS_RTCD_AUTH_KEY.