fix: Set a maximum retries for Docker driver to avoid deadlock. #15026
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cyriltovena
reviewed
Nov 20, 2024
| @@ -153,7 +151,7 @@ func parseConfig(logCtx logger.Info) (*config, error) { | |||
| clientConfig.URL = flagext.URLValue{URL: url} | |||
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| // parse timeout | |||
| if err := parseDuration(cfgTimeoutKey, logCtx, func(d time.Duration) { clientConfig.Timeout = d }); err != nil { | |||
| if err := parseDurationWithDefault(cfgTimeoutKey, logCtx, func(d time.Duration) { clientConfig.Timeout = d }, 10*time.Second); err != nil { | |||
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why not just set the default on the config struct ?
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You mean here? That's also used by Promtail.
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jeschkies
changed the title
cyriltovena
reviewed
Nov 27, 2024
| BackoffConfig: backoff.Config{ | ||
| MinBackoff: client.MinBackoff, | ||
| MaxBackoff: client.MaxBackoff, | ||
| MaxRetries: client.MaxRetries, |
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Interesting. The default is 10 so the driver should not deadlock it can just take almost an hour until the client gives up. For production use this should be fine.
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What this PR does / why we need it:
There's a long ticket claiming that the Docker driver would deadlock when the configured Loki endpoint becomes unreachable. The root cause is that the Loki client retries forever until it can reach Loki again. This looks like a deadlock.
This issues is documented with a workaround. However, users still struggle. That's why this change proposes to make the workaround the default behavior.
Which issue(s) this PR fixes:
Fixes #2361
Special notes for your reviewer:
Checklist
CONTRIBUTING.mdguide (required)featPRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.docs/sources/setup/upgrade/_index.mddeprecated-config.yamlanddeleted-config.yamlfiles respectively in thetools/deprecated-config-checkerdirectory. Example PR