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74 lines
3.6 KiB
Markdown
74 lines
3.6 KiB
Markdown
<!--
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SPDX-FileCopyrightText: 2023 Nikita Chernyi
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SPDX-FileCopyrightText: 2023 Slavi Pantaleev
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SPDX-FileCopyrightText: 2024 - 2025 Suguru Hirahara
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SPDX-License-Identifier: AGPL-3.0-or-later
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-->
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# Setting up synapse-auto-compressor (optional)
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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 Synapse's `state_groups` database table in the background.
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See the project's [documentation](https://github.com/matrix-org/rust-synapse-compress-state/blob/master/README.md#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.example.com/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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### Edit the schedule (optional)
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By default the task will around 0 a.m. every day based on the `matrix_synapse_auto_compressor_schedule` variable with a randomized delay of 6 hours (controlled by the `matrix_synapse_auto_compressor_schedule_randomized_delay_sec` variable). It is defined in the format of systemd timer calendar.
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To edit the schedule, add the following configuration to your `vars.yml` file (adapt to your needs):
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```yaml
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matrix_synapse_auto_compressor_schedule: "*-*-* 00:00:00"
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# Consider adjusting the randomized delay or setting it to 0 to disable randomized delays.
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# matrix_synapse_auto_compressor_schedule_randomized_delay_sec: 6h
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```
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### Extending the configuration
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There are some additional things you may wish to configure about the component.
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Take a look at:
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- `roles/custom/matrix-synapse-auto-compressor/defaults/main.yml` for some variables that you can customize via your `vars.yml` file
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## Installing
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After configuring the playbook, run it with [playbook tags](playbook-tags.md) as below:
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<!-- NOTE: let this conservative command run (instead of install-all) to make it clear that failure of the command means something is clearly broken. -->
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```sh
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ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
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```
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The shortcut commands with the [`just` program](just.md) are also available: `just install-all` or `just setup-all`
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`just install-all` is useful for maintaining your setup quickly ([2x-5x faster](../CHANGELOG.md#2x-5x-performance-improvements-in-playbook-runtime) than `just setup-all`) when its components remain unchanged. If you adjust your `vars.yml` to remove other components, you'd need to run `just setup-all`, or these components will still remain installed. Note these shortcuts run the `ensure-matrix-users-created` tag too.
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## Usage
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After installation, `synapse_auto_compressor` will run automatically every day at `00:00:00` (as defined in `matrix_synapse_auto_compressor_schedule` by default).
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### Manually start the task
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Sometimes it can be helpful to execute compression as you'd like, avoiding to wait until 00:00, like when you test your configuration.
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If you want to execute it immediately, log in to the server with SSH and run `systemctl start matrix-synapse-auto-compressor`.
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This will not return until the compression is done, so it can possibly take a long time. Consider using [tmux](https://en.wikipedia.org/wiki/Tmux) if your SSH connection is unstable.
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## Troubleshooting
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As with all other services, you can find the logs in [systemd-journald](https://www.freedesktop.org/software/systemd/man/systemd-journald.service.html) by logging in to the server with SSH and running `journalctl -fu matrix-synapse-auto-compressor`.
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