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Update maintenance-and-troubleshooting.md: create sections "Maintenance" and "Troubleshooting"

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Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
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@ -1,6 +1,24 @@
# Maintenance and Troubleshooting
## How to see the current status of your services
## Maintenance
### Remove unused Docker data
You can free some disk space from Docker by removing its unused data. See [docker system prune](https://docs.docker.com/engine/reference/commandline/system_prune/) for more information.
```sh
ansible-playbook -i inventory/hosts setup.yml --tags=run-docker-prune
```
The shortcut command with `just` program is also available: `just run-tags run-docker-prune`
### Postgres
See the dedicated [PostgreSQL Maintenance](maintenance-postgres.md) documentation page.
## Troubleshooting
### How to see the current status of your services
You can check the status of your services by using `systemctl status`. Example:
@ -12,7 +30,7 @@ sudo systemctl status matrix-synapse
Active: active (running) since Sun 2024-01-14 09:13:06 UTC; 1h 31min ago
```
## How to see the logs
### How to see the logs
Docker containers that the playbook configures are supervised by [systemd](https://wiki.archlinux.org/title/Systemd) and their logs are configured to go to [systemd-journald](https://wiki.archlinux.org/title/Systemd/Journal).
@ -26,7 +44,7 @@ Available service names can be seen by doing `ls /etc/systemd/system/matrix*.ser
We just simply delegate logging to journald and it takes care of persistence and expiring old data.
### Enable systemd/journald logs persistence
#### Enable systemd/journald logs persistence
On some distros, the journald logs are just in-memory and not persisted to disk.
@ -43,7 +61,7 @@ RateLimitBurst=0
Storage=persistent
```
## How to check if services work
### How to check if services work
The playbook can perform a check to ensure that you've configured things correctly and that services are running.
@ -58,17 +76,3 @@ The shortcut command with `just` program is also available: `just run-tags self-
If it's all green, everything is probably running correctly.
Besides this self-check, you can also check whether your server federates with the Matrix network by using the [Federation Tester](https://federationtester.matrix.org/) against your base domain (`example.com`), not the `matrix.example.com` subdomain.
## Remove unused Docker data
You can free some disk space from Docker by removing its unused data. See [docker system prune](https://docs.docker.com/engine/reference/commandline/system_prune/) for more information.
```sh
ansible-playbook -i inventory/hosts setup.yml --tags=run-docker-prune
```
The shortcut command with `just` program is also available: `just run-tags run-docker-prune`
## Postgres
See the dedicated [PostgreSQL Maintenance](maintenance-postgres.md) documentation page.