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# Setting up synapse_auto_compressor
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The playbook can install and configure [synapse_auto_compressor](https://github.com/matrix-org/rust-synapse-compress-state/#automated-tool-synapse_auto_compressor) for you.
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It's a cli tool that automatically compresses `state_groups` database table in background.
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See the project's [documentation](https://github.com/matrix-org/rust-synapse-compress-state/#automated-tool-synapse_auto_compressor) to learn what it does and why it might be useful to you.
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## Adjusting the playbook configuration
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Add the following configuration to your `inventory/host_vars/matrix.DOMAIN/vars.yml` file:
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```yaml
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matrix_synapse_auto_compressor_enabled: true
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```
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## Installing
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After configuring the playbook, run the [installation](installing.md) command again:
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```
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ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
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```
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## Usage
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After installation, synapse_auto_compressor will run automatically every day by the defined schedule
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## Manually start the tool
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For testing your setup it can be helpful to not wait until 00:00. If you want to run the tool immediately, log onto the server
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and run `systemctl start matrix-synapse-auto-compressor`. This will not return until the run is done, so possibly a long time.
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Consider using [tmux](https://en.wikipedia.org/wiki/Tmux) if your SSH connection is unstable.
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---
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# synapse_auto_compressor tool
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# Project source code URL: https://github.com/matrix-org/rust-synapse-compress-state
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matrix_synapse_auto_compressor_enabled: false
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matrix_synapse_auto_compressor_container_image_self_build: false
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matrix_synapse_auto_compressor_container_repo: "https://gitlab.com/etke.cc/rust-synapse-compress-state.git"
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matrix_synapse_auto_compressor_container_repo_version: "{{ 'main' if matrix_synapse_auto_compressor_version == 'latest' else matrix_synapse_auto_compressor_version }}"
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matrix_synapse_auto_compressor_container_src_files_path: "{{ matrix_synapse_auto_compressor_base_path }}"
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matrix_synapse_auto_compressor_version: v0.1.3
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matrix_synapse_auto_compressor_container_image: "{{ matrix_synapse_auto_compressor_container_image_name_prefix }}etke.cc/rust-synapse-compress-state:{{ matrix_synapse_auto_compressor_version }}"
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matrix_synapse_auto_compressor_container_image_name_prefix: "{{ 'localhost/' if matrix_synapse_auto_compressor_container_image_self_build else 'registry.gitlab.com/' }}"
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matrix_synapse_auto_compressor_container_image_force_pull: "{{ matrix_synapse_auto_compressor_container_image.endswith(':latest') }}"
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matrix_synapse_auto_compressor_base_path: "{{ matrix_base_data_path }}/synapse-auto-compressor"
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# A list of extra arguments to pass to the container
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matrix_synapse_auto_compressor_container_extra_arguments: []
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# List of systemd services that matrix-synapse-auto-compressor.service depends on
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matrix_synapse_auto_compressor_systemd_required_services_list: ['docker.service']
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# List of systemd services that matrix-synapse-auto-compressor.service wants
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matrix_synapse_auto_compressor_systemd_wanted_services_list: []
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matrix_synapse_auto_compressor_database_username: 'synapse'
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matrix_synapse_auto_compressor_database_password: 'some-password'
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matrix_synapse_auto_compressor_database_hostname: ''
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matrix_synapse_auto_compressor_database_port: 5432
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matrix_synapse_auto_compressor_database_name: 'synapse'
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# connection string to synapse database (postgres only)
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matrix_synapse_auto_compressor_synapse_database: 'postgres://{{ matrix_synapse_auto_compressor_database_username }}:{{ matrix_synapse_auto_compressor_database_password }}@{{ matrix_synapse_auto_compressor_database_hostname }}:{{ matrix_synapse_auto_compressor_database_port }}/{{ matrix_synapse_auto_compressor_database_name }}'
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# systemd calendar configuration for the compressor job
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matrix_synapse_auto_compressor_calendar: "*-*-* 00:00:00"
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# The number of state groups to work on at once.
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# All of the entries from state_groups_state are requested from the database for state groups that are worked on.
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# Therefore small chunk sizes may be needed on machines with low memory.
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# Note: if the compressor fails to find space savings on the chunk as a whole
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# (which may well happen in rooms with lots of backfill in) then the entire chunk is skipped.
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matrix_synapse_auto_compressor_chunk_size: 500
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# CHUNKS_TO_COMPRESS chunks of size CHUNK_SIZE will be compressed.
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# The higher this number is set to, the longer the compressor will run for.
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matrix_synapse_auto_compressor_chunks_to_compress: 100
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matrix_synapse_auto_compressor_command: "synapse_auto_compressor -p {{ matrix_synapse_auto_compressor_synapse_database }} -c {{ matrix_synapse_auto_compressor_chunk_size }} -n {{ matrix_synapse_auto_compressor_chunks_to_compress }}"
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---
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- name: Ensure synapse-auto-compressor paths exist
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ansible.builtin.file:
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path: "{{ matrix_synapse_auto_compressor_container_src_files_path }}"
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state: directory
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mode: 0750
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owner: "{{ matrix_user_username }}"
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group: "{{ matrix_user_groupname }}"
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when: matrix_synapse_auto_compressor_container_image_self_build | bool
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- name: Ensure synapse-auto-compressor image is pulled
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community.docker.docker_image:
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name: "{{ matrix_synapse_auto_compressor_container_image }}"
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source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
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force_source: "{{ matrix_synapse_auto_compressor_container_image_force_pull if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
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force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_synapse_auto_compressor_container_image_force_pull }}"
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when: "not matrix_synapse_auto_compressor_container_image_self_build | bool"
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register: result
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retries: "{{ devture_playbook_help_container_retries_count }}"
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delay: "{{ devture_playbook_help_container_retries_delay }}"
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until: result is not failed
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- name: Ensure synapse-auto-compressor repository is present on self-build
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ansible.builtin.git:
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repo: "{{ matrix_synapse_auto_compressor_container_repo }}"
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version: "{{ matrix_synapse_auto_compressor_container_repo_version }}"
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dest: "{{ matrix_synapse_auto_compressor_container_src_files_path }}"
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force: "yes"
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become: true
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become_user: "{{ matrix_user_username }}"
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register: matrix_synapse_auto_compressor_git_pull_results
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when: "matrix_synapse_auto_compressor_container_image_self_build | bool"
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- name: Ensure synapse-auto-compressor image is built
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community.docker.docker_image:
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name: "{{ matrix_synapse_auto_compressor_container_image }}"
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source: build
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force_source: "{{ matrix_synapse_auto_compressor_git_pull_results.changed if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
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force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_mailer_git_pull_results.changed }}"
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build:
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dockerfile: Dockerfile
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path: "{{ matrix_synapse_auto_compressor_container_src_files_path }}"
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pull: true
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when: "matrix_synapse_auto_compressor_container_image_self_build | bool"
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- name: Ensure matrix-synapse-auto-compressor systemd service and timer are installed
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ansible.builtin.template:
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src: "{{ role_path }}/templates/matrix-synapse-auto-compressor.{{ item }}.j2"
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dest: "{{ devture_systemd_docker_base_systemd_path }}/matrix-synapse-auto-compressor.{{ item }}"
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mode: 0644
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with_items:
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- service
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- timer
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---
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- block:
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- when: matrix_synapse_auto_compressor_enabled | bool
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ansible.builtin.include_tasks: "{{ role_path }}/tasks/install.yml"
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tags:
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- setup-all
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- setup-synapse-auto-compressor
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- install-all
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- install-synapse-auto-compressor
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- block:
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- when: not matrix_synapse_auto_compressor_enabled | bool
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ansible.builtin.include_tasks: "{{ role_path }}/tasks/uninstall.yml"
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tags:
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- setup-all
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- setup-synapse-auto-compressor
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---
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- name: Check existence of matrix-synapse-auto-compressor service
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ansible.builtin.stat:
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path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-synapse-auto-compressor.service"
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register: matrix_synapse_auto_compressor_service_stat
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- when: matrix_synapse_auto_compressor_service_stat.stat.exists | bool
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block:
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- name: Ensure matrix-synapse-auto-compressor is stopped
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ansible.builtin.service:
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name: matrix-synapse-auto-compressor
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state: stopped
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enabled: false
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daemon_reload: true
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- name: Ensure matrix-synapse-auto-compressor.service doesn't exist
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ansible.builtin.file:
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path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-synapse-auto-compressor.service"
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state: absent
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- name: Ensure matrix-synapse-auto-compressor.timer doesn't exist
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ansible.builtin.file:
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path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-synapse-auto-compressor.timer"
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state: absent
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- name: Ensure Matrix synapse-auto-compressor paths don't exist
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ansible.builtin.file:
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path: "{{ matrix_synapse_auto_compressor_base_path }}"
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state: absent
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#jinja2: lstrip_blocks: "True"
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[Unit]
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Description=Synapse State Auto Compressor
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{% for service in matrix_synapse_auto_compressor_systemd_required_services_list %}
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Requires={{ service }}
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After={{ service }}
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{% endfor %}
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{% for service in matrix_synapse_auto_compressor_systemd_wanted_services_list %}
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Wants={{ service }}
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{% endfor %}
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DefaultDependencies=no
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[Service]
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Type=oneshot
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Environment="HOME={{ devture_systemd_docker_base_systemd_unit_home_path }}"
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ExecStartPre=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} kill matrix-synapse-auto-compressor 2>/dev/null || true'
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ExecStartPre=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} rm matrix-synapse-auto-compressor 2>/dev/null || true'
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ExecStart={{ devture_systemd_docker_base_host_command_docker }} run --rm --name matrix-synapse-auto-compressor \
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--log-driver=none \
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--cap-drop=ALL \
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--read-only \
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--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
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--network={{ matrix_docker_network }} \
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{% for arg in matrix_synapse_auto_compressor_container_extra_arguments %}
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{{ arg }} \
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{% endfor %}
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{{ matrix_synapse_auto_compressor_container_image }} \
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{{ matrix_synapse_auto_compressor_command }}
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ExecStop=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} kill matrix-synapse-auto-compressor 2>/dev/null || true'
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ExecStop=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} rm matrix-synapse-auto-compressor 2>/dev/null || true'
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SyslogIdentifier=matrix-synapse-auto-compressor
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[Install]
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WantedBy=multi-user.target
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[Unit]
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Description=Synapse State Auto Compressor Timer
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[Timer]
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Unit=matrix-synapse-auto-compressor.service
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OnCalendar={{ matrix_synapse_auto_compressor_calendar }}
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[Install]
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WantedBy=timers.target
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