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Merge pull request #125377 from wojtek-t/watchcache_resource_version_metric

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Expose resource version metrics from watchcache
This commit is contained in:
Kubernetes Prow Robot 2024-06-10 03:31:29 -07:00 committed by GitHub
commit 6ba9fa89fb
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2 changed files with 22 additions and 1 deletions
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17
staging/src/k8s.io/apiserver/pkg/storage/cacher/metrics/metrics.go
View File

@ -106,6 +106,17 @@ var (
[]string{"resource"},
)
watchCacheResourceVersion = compbasemetrics.NewGaugeVec(
&compbasemetrics.GaugeOpts{
Namespace: namespace,
Subsystem: subsystem,
Name: "resource_version",
Help: "Current resource version of watch cache broken by resource type.",
StabilityLevel: compbasemetrics.ALPHA,
},
[]string{"resource"},
)
watchCacheCapacityIncreaseTotal = compbasemetrics.NewCounterVec(
&compbasemetrics.CounterOpts{
Subsystem: subsystem,
@ -171,6 +182,7 @@ func Register() {
legacyregistry.MustRegister(EventsReceivedCounter)
legacyregistry.MustRegister(EventsCounter)
legacyregistry.MustRegister(TerminatedWatchersCounter)
legacyregistry.MustRegister(watchCacheResourceVersion)
legacyregistry.MustRegister(watchCacheCapacityIncreaseTotal)
legacyregistry.MustRegister(watchCacheCapacityDecreaseTotal)
legacyregistry.MustRegister(WatchCacheCapacity)
@ -186,6 +198,11 @@ func RecordListCacheMetrics(resourcePrefix, indexName string, numFetched, numRet
listCacheNumReturned.WithLabelValues(resourcePrefix).Add(float64(numReturned))
}
// RecordResourceVersion sets the current resource version for a given resource type.
func RecordResourceVersion(resourcePrefix string, resourceVersion uint64) {
watchCacheResourceVersion.WithLabelValues(resourcePrefix).Set(float64(resourceVersion))
}
// RecordsWatchCacheCapacityChange record watchCache capacity resize(increase or decrease) operations.
func RecordsWatchCacheCapacityChange(objType string, old, new int) {
WatchCacheCapacity.WithLabelValues(objType).Set(float64(new))

6
staging/src/k8s.io/apiserver/pkg/storage/cacher/watch_cache.go
View File

@ -348,6 +348,7 @@ func (w *watchCache) processEvent(event watch.Event, resourceVersion uint64, upd
if w.eventHandler != nil {
w.eventHandler(wcEvent)
}
metrics.RecordResourceVersion(w.groupResource.String(), resourceVersion)
return nil
}
@ -430,6 +431,7 @@ func (w *watchCache) UpdateResourceVersion(resourceVersion string) {
}
w.eventHandler(wcEvent)
}
metrics.RecordResourceVersion(w.groupResource.String(), rv)
}
// List returns list of pointers to <storeElement> objects.
@ -629,7 +631,9 @@ func (w *watchCache) Replace(objs []interface{}, resourceVersion string) error {
w.onReplace()
}
w.cond.Broadcast()
klog.V(3).Infof("Replace watchCache (rev: %v) ", resourceVersion)
metrics.RecordResourceVersion(w.groupResource.String(), version)
klog.V(3).Infof("Replaced watchCache (rev: %v) ", resourceVersion)
return nil
}