Sampling of log lines

[gouthamve]

Promtail could support sampling of log-lines based on regexp patterns. This helps systems logging too much.

A simple config would be:

- regex: http 200 .*
  sampling: 0.01
- regex: http 500 .*
  sampling: 1
- regex: .*error.*
  sampling: 1
- regex: .*
  sampling: 0.1

[aylei]

Emm... this reminds me of metric_relabel_config of Prometheus, which take actions based on the metric content.
Some other issues, like #88 , #79 , appear to have the same pattern: if log(metric) content match some pattern, do something (drop, rename, label manipulation...)
Maybe we can address those issues with a mechanism like log_relabel_config in promtail, IMHO.

[daixiang0]

@gouthamve hi, is any plan about this?

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 30 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[quchenyuan]

any plan on supporting metric_relabel_config ?