If a sentinel command is configured, it runs every minute.

[haraldkoch]

The configured sentinel command runs every minute, instead of once every period. The reason for this is appears to be the Prometheus metrics updater maintainRebootRequiredMetric() here:

https://github.com/kubereboot/kured/blob/9e4b69f8189cbf685e459ad1be2eb15f4dfd0cd2/cmd/kured/main.go#L566C1-L575C2

This is arguably incorrect. The metric should be updated only when the sentinel command is run in the main code (i.e. once every period interval).

A compromise would be to have the function maintainRebootRequiredMetric() sleep for period instead of the hard-coded time.Minute that is there now.

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[miheinr]

The configured sentinel command runs every minute, instead of once every period.

I can confirm this behaviour for version 1.15.0. Although I set period to 30min the sentinel command runs every 1min.

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[kingdonb]

Since no one has turned up to defend the code's position, I have to infer that we'd be open to some kind of PR to fix this.

(Un-labeled as inactive)

[jackfrancis]

@haraldkoch @kingdonb is this as simple as this? #919

Note the potential downside for folks who want to have a separate periodicity for metrics data.

[haraldkoch]

Huzzah!

Note the potential downside for folks who want to have a separate periodicity for metrics data.

The Prometheus library caches the metric values passed to metric.Set(), and returns the cached value to anyone who queries the metrics endpoint, so this shouldn't affect any metrics data.

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