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

#jinja2: lstrip_blocks: "True"
[Unit]
Description=Synapse worker ({{ matrix_synapse_worker_container_name }})
AssertPathExists={{ matrix_synapse_config_dir_path }}/{{ matrix_synapse_worker_config_file_name }}
After=matrix-synapse.service

[Service]
Type=simple
Environment="HOME={{ matrix_systemd_unit_home_path }}"

ExecStartPre=-{{ matrix_host_command_docker }} kill {{ matrix_synapse_worker_container_name }}
ExecStartPre=-{{ matrix_host_command_docker }} rm {{ matrix_synapse_worker_container_name }}

# Intentional delay, so that the homeserver can manage to start.
ExecStartPre={{ matrix_host_command_sleep }} 5

ExecStart={{ matrix_host_command_docker }} run --rm --name {{ matrix_synapse_worker_container_name }} \
			--log-driver=none \
			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
			--cap-drop=ALL \
			--read-only \
			--tmpfs=/tmp:rw,noexec,nosuid,size={{ matrix_synapse_tmp_directory_size_mb }}m \
			--network={{ matrix_docker_network }} \
			{% if matrix_synapse_worker_details.port != 0 %}
			--health-cmd 'curl -fSs http://localhost:{{ matrix_synapse_worker_details.port }}/health || exit 1' \
			{% else %}
			--no-healthcheck \
			{% endif %}
			{% if matrix_synapse_workers_enabled and matrix_synapse_workers_container_host_bind_address %}
			{% if matrix_synapse_worker_details.port != 0 %}
			-p {{ '' if matrix_synapse_workers_container_host_bind_address == '*' else (matrix_synapse_workers_container_host_bind_address + ':') }}{{ matrix_synapse_worker_details.port }}:{{ matrix_synapse_worker_details.port }} \
			{% endif %}
			{% if matrix_synapse_worker_details.metrics_port != 0 %}
			-p {{ '' if matrix_synapse_workers_container_host_bind_address == '*' else (matrix_synapse_workers_container_host_bind_address + ':') }}{{ matrix_synapse_worker_details.metrics_port }}:{{ matrix_synapse_worker_details.metrics_port }} \
			{% endif %}
			{% endif %}
			--mount type=bind,src={{ matrix_synapse_config_dir_path }},dst=/data,ro \
			--mount type=bind,src={{ matrix_synapse_storage_path }},dst=/matrix-media-store-parent,bind-propagation=slave \
			{% for volume in matrix_synapse_container_additional_volumes %}
			-v {{ volume.src }}:{{ volume.dst }}:{{ volume.options }} \
			{% endfor %}
			{% for arg in matrix_synapse_container_extra_arguments %}
			{{ arg }} \
			{% endfor %}
			{{ matrix_synapse_docker_image }} \
			run -m synapse.app.{{ matrix_synapse_worker_details.type }} -c /data/homeserver.yaml -c /data/{{ matrix_synapse_worker_config_file_name }}


ExecStop=-{{ matrix_host_command_docker }} kill {{ matrix_synapse_worker_container_name }}
ExecStop=-{{ matrix_host_command_docker }} rm {{ matrix_synapse_worker_container_name }}

ExecReload={{ matrix_host_command_docker }} exec {{ matrix_synapse_worker_container_name }} /bin/sh -c 'kill -HUP 1'
Restart=always
RestartSec=30
SyslogIdentifier={{ matrix_synapse_worker_container_name }}

# Intentionally not making this WantedBy=matrix-synapse.service,
# as matrix.synapse.service already has `Wants=` lines.
# Also, WantedBy will trigger the creation of some `matrix-synapse.service.wants/` directory,
# which we'd have to clean, etc. Better not.
[Install]
WantedBy=multi-user.target