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watch cache: metrics: objectType -> group resource

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Use the group resource instead of objectType in watch cache metrics,
because all CustomResources are grouped together as
*unstructured.Unstructured, instead of 1 entry per type.

Signed-off-by: Andy Goldstein <andy.goldstein@redhat.com>
This commit is contained in:
Andy Goldstein 2022-08-11 15:51:21 -04:00
parent 397533a4c2
commit d08b69e8d3
4 changed files with 16 additions and 22 deletions
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14
staging/src/k8s.io/apiserver/pkg/storage/cacher/cacher.go
View File

@ -70,7 +70,8 @@ type Config struct {
// An underlying storage.Versioner.
Versioner storage.Versioner
// The GroupResource the cacher is caching. Used for disambiguating *unstructured.Unstructured (CRDs) in logging.
// The GroupResource the cacher is caching. Used for disambiguating *unstructured.Unstructured (CRDs) in logging
// and metrics.
GroupResource schema.GroupResource
// The Cache will be caching objects of a given Type and assumes that they
@ -384,7 +385,7 @@ func NewCacherFromConfig(config Config) (*Cacher, error) {
}
watchCache := newWatchCache(
config.KeyFunc, cacher.processEvent, config.GetAttrsFunc, config.Versioner, config.Indexers, config.Clock, objType)
config.KeyFunc, cacher.processEvent, config.GetAttrsFunc, config.Versioner, config.Indexers, config.Clock, config.GroupResource)
listerWatcher := NewCacherListerWatcher(config.Storage, config.ResourcePrefix, config.NewListFunc)
reflectorName := "storage/cacher.go:" + config.ResourcePrefix
@ -430,7 +431,7 @@ func (c *Cacher) startCaching(stopChannel <-chan struct{}) {
successfulList = true
c.ready.set(true)
klog.V(1).Infof("cacher (%v): initialized", c.groupResource.String())
metrics.WatchCacheInitializations.WithLabelValues(c.objectType.String()).Inc()
metrics.WatchCacheInitializations.WithLabelValues(c.groupResource.String()).Inc()
})
defer func() {
if successfulList {
@ -804,7 +805,7 @@ func (c *Cacher) dispatchEvents() {
c.dispatchEvent(&event)
}
lastProcessedResourceVersion = event.ResourceVersion
metrics.EventsCounter.WithLabelValues(c.objectType.String()).Inc()
metrics.EventsCounter.WithLabelValues(c.groupResource.String()).Inc()
case <-bookmarkTimer.C():
bookmarkTimer.Reset(wait.Jitter(time.Second, 0.25))
// Never send a bookmark event if we did not see an event here, this is fine
@ -1281,7 +1282,7 @@ func (c *cacheWatcher) add(event *watchCacheEvent, timer *time.Timer) bool {
// Since we don't want to block on it infinitely,
// we simply terminate it.
klog.V(1).Infof("Forcing %v watcher close due to unresponsiveness: %v. len(c.input) = %v, len(c.result) = %v", c.groupResource.String(), c.identifier, len(c.input), len(c.result))
metrics.TerminatedWatchersCounter.WithLabelValues(c.objectType.String()).Inc()
metrics.TerminatedWatchersCounter.WithLabelValues(c.groupResource.String()).Inc()
c.forget(false)
}
@ -1479,9 +1480,8 @@ func (c *cacheWatcher) processInterval(ctx context.Context, cacheInterval *watch
initEventCount++
}
objType := c.objectType.String()
if initEventCount > 0 {
metrics.InitCounter.WithLabelValues(objType).Add(float64(initEventCount))
metrics.InitCounter.WithLabelValues(c.groupResource.String()).Add(float64(initEventCount))
}
processingTime := time.Since(startTime)
if processingTime > initProcessThreshold {

4
staging/src/k8s.io/apiserver/pkg/storage/cacher/cacher_whitebox_test.go
View File

@ -48,10 +48,6 @@ import (
testingclock "k8s.io/utils/clock/testing"
)
var (
objectType = reflect.TypeOf(&v1.Pod{})
)
// verifies the cacheWatcher.process goroutine is properly cleaned up even if
// the writes to cacheWatcher.result channel is blocked.
func TestCacheWatcherCleanupNotBlockedByResult(t *testing.T) {

15
staging/src/k8s.io/apiserver/pkg/storage/cacher/watch_cache.go
View File

@ -19,7 +19,6 @@ package cacher
import (
"fmt"
"math"
"reflect"
"sort"
"sync"
"time"
@ -28,6 +27,7 @@ import (
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/apiserver/pkg/storage"
"k8s.io/apiserver/pkg/storage/cacher/metrics"
@ -189,8 +189,8 @@ type watchCache struct {
// An underlying storage.Versioner.
versioner storage.Versioner
// cacher's objectType.
objectType reflect.Type
// cacher's group resource
groupResource schema.GroupResource
// For testing cache interval invalidation.
indexValidator indexValidator
@ -203,7 +203,7 @@ func newWatchCache(
versioner storage.Versioner,
indexers *cache.Indexers,
clock clock.Clock,
objectType reflect.Type) *watchCache {
groupResource schema.GroupResource) *watchCache {
wc := &watchCache{
capacity: defaultLowerBoundCapacity,
keyFunc: keyFunc,
@ -219,10 +219,9 @@ func newWatchCache(
eventHandler: eventHandler,
clock: clock,
versioner: versioner,
objectType: objectType,
groupResource: groupResource,
}
objType := objectType.String()
metrics.WatchCacheCapacity.WithLabelValues(objType).Set(float64(wc.capacity))
metrics.WatchCacheCapacity.WithLabelValues(groupResource.String()).Set(float64(wc.capacity))
wc.cond = sync.NewCond(wc.RLocker())
wc.indexValidator = wc.isIndexValidLocked
@ -387,7 +386,7 @@ func (w *watchCache) doCacheResizeLocked(capacity int) {
newCache[i%capacity] = w.cache[i%w.capacity]
}
w.cache = newCache
metrics.RecordsWatchCacheCapacityChange(w.objectType.String(), w.capacity, capacity)
metrics.RecordsWatchCacheCapacityChange(w.groupResource.String(), w.capacity, capacity)
w.capacity = capacity
}

5
staging/src/k8s.io/apiserver/pkg/storage/cacher/watch_cache_test.go
View File

@ -18,7 +18,6 @@ package cacher
import (
"fmt"
"reflect"
"strconv"
"strings"
"testing"
@ -31,9 +30,9 @@ import (
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/apiserver/pkg/apis/example"
"k8s.io/apiserver/pkg/storage"
"k8s.io/client-go/tools/cache"
testingclock "k8s.io/utils/clock/testing"
@ -112,7 +111,7 @@ func newTestWatchCache(capacity int, indexers *cache.Indexers) *testWatchCache {
}
versioner := storage.APIObjectVersioner{}
mockHandler := func(*watchCacheEvent) {}
wc := newWatchCache(keyFunc, mockHandler, getAttrsFunc, versioner, indexers, testingclock.NewFakeClock(time.Now()), reflect.TypeOf(&example.Pod{}))
wc := newWatchCache(keyFunc, mockHandler, getAttrsFunc, versioner, indexers, testingclock.NewFakeClock(time.Now()), schema.GroupResource{Resource: "pods"})
// To preserve behavior of tests that assume a given capacity,
// resize it to th expected size.
wc.capacity = capacity