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Note that files in docs/assets/ are managed with REUSE.toml Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
44 lines
2.8 KiB
Markdown
44 lines
2.8 KiB
Markdown
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SPDX-FileCopyrightText: 2024 MDAD Team and contributors
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SPDX-License-Identifier: AGPL-3.0-or-later
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-->
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# Enabling metrics and graphs for Postgres (optional)
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Expanding on the metrics exposed by the [synapse exporter and the node exporter](configuring-playbook-prometheus-grafana.md), the playbook enables the [postgres exporter](https://github.com/prometheus-community/postgres_exporter) that exposes more detailed information about what's happening on your postgres database.
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## Adjusting the playbook configuration
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To enable the postgres exporter, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
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```yaml
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prometheus_postgres_exporter_enabled: true
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```
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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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## What does it do?
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Name | Description
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-----|----------
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`prometheus_postgres_exporter_enabled`|Enable the postgres prometheus exporter. This sets up the docker container, connects it to the database and adds a 'job' to the prometheus config which tells prometheus about this new exporter. The default is 'false'
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`prometheus_postgres_exporter_database_username`| The 'username' for the user that the exporter uses to connect to the database. The default is 'matrix_prometheus_postgres_exporter'
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`prometheus_postgres_exporter_database_password`| The 'password' for the user that the exporter uses to connect to the database. By default, this is auto-generated by the playbook
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`prometheus_postgres_exporter_container_labels_traefik_enabled`|If set to `true`, exposes the Postgres exporter metrics on `https://matrix.example.com/metrics/postgres-exporter` for usage with an [external Prometheus server](configuring-playbook-prometheus-grafana.md#collecting-metrics-to-an-external-prometheus-server). To password-protect the metrics, see `matrix_metrics_exposure_http_basic_auth_users` on that other documentation page.
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## More information
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- [The PostgresSQL dashboard](https://grafana.com/grafana/dashboards/9628) (generic postgres dashboard)
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