ruler: prometheus_rule_group_last_duration_seconds is not working.

[bwplotka]

I can see the values out of the world totally. Is it even updated? Let's fix this.

[yeya24]

In prometheus 2.7.1, this metric used seconds instead of nanoseconds.
Here is the PR #5153.
And in thanos, it is still the old package using nanoseconds.

func (g *Group) setEvaluationDuration(dur time.Duration) {
	g.metrics.groupLastDuration.WithLabelValues(groupKey(g.file, g.name)).Set(float64(dur))

	g.mtx.Lock()
	defer g.mtx.Unlock()
	g.evaluationDuration = dur
}

[bwplotka]

Wow, thanks for this, that might be it. But still it's bit off

[GiedriusS]

Was this fixed after the library has been updated? 😄

[yeya24]

Is this issue fixed now?

[jojohappy]

@yeya24 It seems to be fixed in #1009 with v0.4.0. Let's double check it.

[simonpasquier]

Using master, I see that prometheus_rule_group_last_duration_seconds values match with the rules UI.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.