Ansible Role systemd_journald

This role configures Systemd’s logging service „journald“.

From man journald.conf:

  • SystemKeepFree= control how much disk space systemd-journald shall leave free for other uses.

  • SystemMaxUse= control how much disk space the journal may use up at most.

  • systemd-journald will respect both limits and use the smaller of the two values.

Example with numbers on a 100G disk:

  • SystemKeepFree=10G means that journald may use at most 100G - 10G = 90G

  • SystemMaxUse=20G

Whenever journald needs to free space, it computes min(90G, 20G), and then deletes archived journal files until usage <= that value. Here, journald will grow the journal up to about 20G, then start deleting archived files to stay under that cap.

Tags

systemd_journald

  • Manages the journald config.

  • Triggers: systemd-journald.service restart.

systemd_journald:state

  • Manages the state of the journald service.

  • Triggers: none.

Optional Role Variables

systemd_journald__conf_storage

  • Controls where to store journal data. Have a look at man 5 journald.conf. Possible options: volatile, persistent, auto, none.

  • Type: String.

  • Default: 'persistent'

systemd_journald__conf_system_keep_free

  • Controls how much disk space systemd-journald shall leave free for other uses. Unlike in journald.conf, you may also specify a percentage value, which will be automatically converted to bytes based on the partition size.

  • Type: String.

  • Default: '70%'

systemd_journald__conf_system_max_use

  • Controls how much disk space the journal may use up at most. Unlike in journald.conf, you may also specify a percentage value, which will be automatically converted to bytes based on the partition size.

  • Type: String.

  • Default: '30%'

systemd_journald__service_enabled

  • Enables or disables the service, analogous to systemctl enable/disable.

  • Type: Bool.

  • Default: true

systemd_journald__service_state

  • Changes the state of the service, analogous to systemctl start/stop/restart/reload. Possible options: started, stopped, restarted, reloaded.

  • Type: String.

  • Default: 'started'

Example:

# optional
systemd_journald__conf_storage: 'persistent'
systemd_journald__conf_system_keep_free: '20%'
systemd_journald__conf_system_max_use: '5G'
systemd_journald__service_enabled: true
systemd_journald__service_state: 'started'

License

The Unlicense

Author Information

Linuxfabrik GmbH, Zurich