rule: fix panic when calling API /api/v1/rules?type=alert #6189
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fpetkovski
previously approved these changes
Mar 6, 2023
saswatamcode
previously approved these changes
Mar 7, 2023
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Thanks for fixing! 🙂
In the rules proto spec, we have four stdtime fields, the last_evaluation of RuleGroup, RecordingRule, and Alert and this active_at in AlertInstance. The gogo/protobuf issue does specify that the field needs to be non-nullable, but no harm in trying this out.
pkg/rules/manager.go
Outdated
| @@ -97,12 +97,14 @@ func ActiveAlertsToProto(s storepb.PartialResponseStrategy, a *rules.AlertingRul | |||
| active := a.ActiveAlerts() | |||
| ret := make([]*rulespb.AlertInstance, len(active)) | |||
| for i, ruleAlert := range active { | |||
| // https://github.com/gogo/protobuf/issues/519 | |||
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Let's keep comments consistent with the other workarounds as well.
Suggested change
| // https://github.com/gogo/protobuf/issues/519 | |
| // UTC needed due to https://github.com/gogo/protobuf/issues/519. |
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Hello,
I updated the comment (+ another similar one found in the codebase)
Signed-off-by: Thibaut Ackermann <[email protected]>
saswatamcode
approved these changes
Mar 7, 2023
junotx
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to junotx/thanos
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Aug 3, 2023
…6189) Signed-off-by: Thibaut Ackermann <[email protected]>
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Hello,
Sometimes, when I open the
/alertspage on Ruler web UI, I get an error. When it happens, the situation is irremediable and I have to restart the Ruler component completely.. As you can see in the stacktrace linked below, the error look like and old issue fixed in #2925 . After digging, I think this is linked to theAlertInstance.ActiveAtdate, which is not 'formatted' to UTC() before protobuf encoding like the ones in the old PR.I tried to produce a testcase to reproduce this, but unfortunately I failed to find the exact combination of events...
I think this has someting to do with the
reloadprocess of Ruler (either SIGHUP or POST /-/reload) which might be copying the alerts and losing/changing thetime.TimeLocations (which is the real problem with protobuf encoding)..Here is the full stacktrace from server:
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Verification