matrix-docker-ansible-deploy/roles/matrix-coturn/templates/systemd/matrix-coturn.service.j2

#jinja2: lstrip_blocks: "True"
[Unit]
Description=Matrix Coturn server
{% for service in matrix_coturn_systemd_required_services_list %}
Requires={{ service }}
After={{ service }}
{% endfor %}
DefaultDependencies=no
PartOf=matrix.target

[Service]
Type=simple
Environment="HOME={{ matrix_systemd_unit_home_path }}"
ExecStartPre=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} stop matrix-coturn 2>/dev/null'
ExecStartPre=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} rm matrix-coturn 2>/dev/null'

ExecStart={{ matrix_host_command_docker }} run --rm --name matrix-coturn \
			--log-driver=none \
			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
			--cap-drop=ALL \
			--cap-add=NET_BIND_SERVICE \
			--entrypoint=turnserver \
			--read-only \
			--tmpfs=/var/tmp:rw,noexec,nosuid,size=100m \
			--network={{ matrix_coturn_docker_network }} \
			{% if matrix_coturn_container_stun_plain_host_bind_port != '' %}
			-p {{ matrix_coturn_container_stun_plain_host_bind_port }}:3478 \
			-p {{ matrix_coturn_container_stun_plain_host_bind_port }}:3478/udp \
			{% endif %}
			{% if matrix_coturn_container_stun_tls_host_bind_port != '' %}
			-p {{ matrix_coturn_container_stun_tls_host_bind_port }}:5349 \
			-p {{ matrix_coturn_container_stun_tls_host_bind_port }}:5349/udp \
			{% endif %}
			{% if matrix_coturn_container_turn_range_listen_interface is not none %}
			-p {{ matrix_coturn_container_turn_range_listen_interface }}{{ ':' if matrix_coturn_container_turn_range_listen_interface else '' }}{{ matrix_coturn_turn_udp_min_port }}-{{ matrix_coturn_turn_udp_max_port }}:{{ matrix_coturn_turn_udp_min_port }}-{{ matrix_coturn_turn_udp_max_port }}/udp \
			{% endif %}
			--mount type=bind,src={{ matrix_coturn_config_path }},dst=/turnserver.conf,ro \
			{% for volume in matrix_coturn_container_additional_volumes %}
			-v {{ volume.src }}:{{ volume.dst }}:{{ volume.options }} \
			{% endfor %}
			{% for arg in matrix_coturn_container_extra_arguments %}
			{{ arg }} \
			{% endfor %}
			{{ matrix_coturn_docker_image }} \
			-c /turnserver.conf

ExecStop=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} stop matrix-coturn 2>/dev/null'
ExecStop=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} rm matrix-coturn 2>/dev/null'

# This only reloads certificates (not other configuration).
# See: https://github.com/coturn/coturn/pull/236
ExecReload={{ matrix_host_command_docker }} exec matrix-coturn kill -USR2 1

Restart=always
RestartSec=30
SyslogIdentifier=matrix-coturn

[Install]
WantedBy=matrix.target