26 lines
1.6 KiB
Markdown
26 lines
1.6 KiB
Markdown
# Journald Tuning
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For the systemd journal size restriction and rate limiting can be fine tuned.
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## Size Restricion
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In Hiera `log_client::journal_system_max_use` (default `50%`) limits the total size of the journal, whereas `log_client::journal_system_keep_free` (default `25%`) ensures how much disk space is keep free in `/var/log` for other use. In addition to the syntax described in [journald.conf(5)](https://www.freedesktop.org/software/systemd/man/latest/journald.conf.htm) (bytes or use K, M, G, T, P, E as units) we also support percentages, i.e. `25%` means that the journal will use mostly/spare at least 25% of `/var/log`. Note that for the use of a percentage limit `/var/log` must be an own partition, else absolute values need to be set.
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`log_client::journal_system_max_file_size` limits the size of an individual journal file. Default ist `32M`.
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If there is no need for a persistent log at all, it can be disabled with
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```
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log_client::persistent_journal: false
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```
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## Rate Limiting
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In Hiera `log_client::journal_rate_limit_burst` defines how many messages of a service are at least logged in the interval period (default 30s). Note that the [actual limit depends on the available disk space](https://www.freedesktop.org/software/systemd/man/latest/journald.conf.html#RateLimitIntervalSec=) The default is `10000` messages.
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So `log_client::journal_rate_limit_interval` defines the above mentioned interval period. Allowed time units are `s`, `min`, `h`, `ms` and `us`. If not specified seconds are assumed.
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Rate limiting is disabled with
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```
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log_client::journal_rate_limit_interval: 0
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```
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