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Explicitly refer users to the relevant roles file so people know where to find the additional configuration options.
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TURN server
The playbook installs a Coturn TURN server by default, so that clients can make audio/video calls even from NAT-ed networks.
By default, the Synapse chat server is configured, so that it points to the Coturn TURN server installed by the playbook.
Disabling Coturn
If, for some reason, you'd like to prevent the playbook from installing Coturn, you can use the following configuration:
matrix_coturn_enabled: false
In that case, Synapse would not point to any Coturn servers and audio/video call functionality may fail.
Manually defining your public IP
In the hosts file we explicitly ask for your server's external IP address when defining ansible_host, because the same value is used for configuring Coturn.
If you'd rather use a local IP for ansible_host, make sure to set up matrix_coturn_turn_external_ip_address replacing YOUR_PUBLIC_IP with the pubic IP used by the server.
matrix_coturn_turn_external_ip_address: "YOUR_PUBLIC_IP"
Using your own external Coturn server
If you'd like to use another TURN server (be it Coturn or some other one), you can configure the playbook like this:
# Disable integrated Coturn server
matrix_coturn_enabled: false
# Point Synapse to your other Coturn server
matrix_synapse_turn_uris:
- turns:HOSTNAME_OR_IP?transport=udp
- turns:HOSTNAME_OR_IP?transport=tcp
- turn:HOSTNAME_OR_IP?transport=udp
- turn:HOSTNAME_OR_IP?transport=tcp
If you have or want to enable Jitsi, you might want to enable the TURN server there too. If you do not do it, Jitsi will fall back to an upstream service.
jitsi_web_stun_servers:
- stun:HOSTNAME_OR_IP:PORT
You can put multiple host/port combinations if you like.
Further variables and configuration options
To see all the available configuration options, check roles/custom/matrix-coturn/defaults/main.yml