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Fix mcm_machine_set_failed_machines metric to more accurately reflect current state #1025

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Merged
merged 2 commits into from
Aug 14, 2025
Merged

Fix mcm_machine_set_failed_machines metric to more accurately reflect current state #1025

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f97f3cf
Clear metric before repopulating, change status variable to reflect m…
gagan16k Aug 7, 2025
965a6fd
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gagan16k Aug 11, 2025
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8 changes: 3 additions & 5 deletions pkg/controller/deployment_machineset_util.go
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Original file line number Diff line number Diff line change
Expand Up @@ -126,13 +126,11 @@ func calculateMachineSetStatus(is *v1alpha1.MachineSet, filteredMachines []*v1al
}
}

// Update the FailedMachines field only if we see new failures
// Clear FailedMachines if ready replicas equals total replicas,
// which means the machineset doesn't have any machine objects which are in any failed state
// #nosec G115 -- number of machines will not exceed MaxInt32
// Update the FailedMachines field when we see new failures
// Set the FailedMachines field to nil if there are no failed machines.
if len(failedMachines) > 0 {
newStatus.FailedMachines = &failedMachines
} else if int32(readyReplicasCount) == is.Status.Replicas {
} else {
newStatus.FailedMachines = nil
}

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5 changes: 5 additions & 0 deletions pkg/controller/metrics.go
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Expand Up @@ -119,6 +119,11 @@ func updateMachineSetStatusRelatedMetric(machineSet *v1alpha1.MachineSet, msMeta
}

func updateMachineSetStatusFailedMachinesMetric(machineSet *v1alpha1.MachineSet, msMeta metav1.ObjectMeta) {
metrics.MachineSetStatusFailedMachines.DeletePartialMatch(prometheus.Labels{
"name": msMeta.Name,
"namespace": msMeta.Namespace,
})

if machineSet.Status.FailedMachines != nil {
for _, failedMachine := range *machineSet.Status.FailedMachines {
metrics.MachineSetStatusFailedMachines.With(prometheus.Labels{
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