mirror of
https://github.com/k3s-io/kubernetes.git
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Merge pull request #93877 from bjrara/test-metrics
Bugfix missing metrics and test cases to ensure terminated request metrics is not missing
This commit is contained in:
Kubernetes Prow Robot
GitHub
commit
fe654797b5
@ -13,19 +13,28 @@ go_test(
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"cors_test.go",
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"goaway_test.go",
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"maxinflight_test.go",
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"priority-and-fairness_test.go",
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"timeout_test.go",
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],
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embed = [":go_default_library"],
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deps = [
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"//staging/src/k8s.io/api/flowcontrol/v1alpha1:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/api/errors:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/util/diff:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/util/runtime:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/apis/flowcontrol/bootstrap:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/authentication/user:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/endpoints/filters:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/endpoints/metrics:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/endpoints/request:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/server/mux:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/util/flowcontrol:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/util/flowcontrol/fairqueuing:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/util/flowcontrol/metrics:go_default_library",
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"//staging/src/k8s.io/component-base/metrics/legacyregistry:go_default_library",
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"//vendor/golang.org/x/net/http2:go_default_library",
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],
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)
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@ -20,6 +20,7 @@ import (
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"context"
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"fmt"
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"net/http"
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"sync"
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"sync/atomic"
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fcv1a1 "k8s.io/api/flowcontrol/v1alpha1"
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@ -57,6 +58,9 @@ var waitingMark = &requestWatermark{
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mutatingObserver: fcmetrics.ReadWriteConcurrencyObserverPairGenerator.Generate(1, 1, []string{epmetrics.MutatingKind}).RequestsWaiting,
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}
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// apfStartOnce is used to avoid sharing one-time mutex with maxinflight handler
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var apfStartOnce sync.Once
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var atomicMutatingExecuting, atomicReadOnlyExecuting int32
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var atomicMutatingWaiting, atomicReadOnlyWaiting int32
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@ -73,6 +77,8 @@ func WithPriorityAndFairness(
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}
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startOnce.Do(func() {
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startRecordingUsage(watermark)
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})
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apfStartOnce.Do(func() {
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startRecordingUsage(waitingMark)
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})
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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@ -139,6 +145,11 @@ func WithPriorityAndFairness(
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}
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}, execute)
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if !served {
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if isMutatingRequest {
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epmetrics.DroppedRequests.WithLabelValues(epmetrics.MutatingKind).Inc()
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} else {
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epmetrics.DroppedRequests.WithLabelValues(epmetrics.ReadOnlyKind).Inc()
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}
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epmetrics.RecordRequestTermination(r, requestInfo, epmetrics.APIServerComponent, http.StatusTooManyRequests)
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tooManyRequests(r, w)
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}
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@ -0,0 +1,350 @@
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/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package filters
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"net/http/httptest"
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"sync"
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"testing"
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"time"
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fctypesv1a1 "k8s.io/api/flowcontrol/v1alpha1"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apiserver/pkg/apis/flowcontrol/bootstrap"
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"k8s.io/apiserver/pkg/authentication/user"
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apifilters "k8s.io/apiserver/pkg/endpoints/filters"
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epmetrics "k8s.io/apiserver/pkg/endpoints/metrics"
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apirequest "k8s.io/apiserver/pkg/endpoints/request"
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"k8s.io/apiserver/pkg/server/mux"
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utilflowcontrol "k8s.io/apiserver/pkg/util/flowcontrol"
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fq "k8s.io/apiserver/pkg/util/flowcontrol/fairqueuing"
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fcmetrics "k8s.io/apiserver/pkg/util/flowcontrol/metrics"
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"k8s.io/component-base/metrics/legacyregistry"
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)
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type mockDecision int
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const (
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decisionNoQueuingExecute mockDecision = iota
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decisionQueuingExecute
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decisionCancelWait
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decisionReject
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decisionSkipFilter
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)
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type fakeApfFilter struct {
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mockDecision mockDecision
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postEnqueue func()
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postDequeue func()
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}
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func (t fakeApfFilter) MaintainObservations(stopCh <-chan struct{}) {
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}
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func (t fakeApfFilter) Handle(ctx context.Context,
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requestDigest utilflowcontrol.RequestDigest,
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noteFn func(fs *fctypesv1a1.FlowSchema, pl *fctypesv1a1.PriorityLevelConfiguration),
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queueNoteFn fq.QueueNoteFn,
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execFn func(),
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) {
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if t.mockDecision == decisionSkipFilter {
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panic("Handle should not be invoked")
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}
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noteFn(bootstrap.SuggestedFlowSchemaGlobalDefault, bootstrap.SuggestedPriorityLevelConfigurationGlobalDefault)
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switch t.mockDecision {
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case decisionNoQueuingExecute:
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execFn()
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case decisionQueuingExecute:
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queueNoteFn(true)
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t.postEnqueue()
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queueNoteFn(false)
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t.postDequeue()
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execFn()
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case decisionCancelWait:
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queueNoteFn(true)
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t.postEnqueue()
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queueNoteFn(false)
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t.postDequeue()
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case decisionReject:
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return
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}
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}
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func (t fakeApfFilter) Run(stopCh <-chan struct{}) error {
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return nil
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}
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func (t fakeApfFilter) Install(c *mux.PathRecorderMux) {
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}
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func newApfServerWithSingleRequest(decision mockDecision, t *testing.T) *httptest.Server {
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onExecuteFunc := func() {
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if decision == decisionCancelWait {
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t.Errorf("execute should not be invoked")
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}
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// atomicReadOnlyExecuting can be either 0 or 1 as we test one request at a time.
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if decision != decisionSkipFilter && atomicReadOnlyExecuting != 1 {
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t.Errorf("Wanted %d requests executing, got %d", 1, atomicReadOnlyExecuting)
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}
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}
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postExecuteFunc := func() {}
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// atomicReadOnlyWaiting can be either 0 or 1 as we test one request at a time.
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postEnqueueFunc := func() {
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if atomicReadOnlyWaiting != 1 {
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t.Errorf("Wanted %d requests in queue, got %d", 1, atomicReadOnlyWaiting)
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}
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}
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postDequeueFunc := func() {
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if atomicReadOnlyWaiting != 0 {
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t.Errorf("Wanted %d requests in queue, got %d", 0, atomicReadOnlyWaiting)
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}
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}
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return newApfServerWithHooks(decision, onExecuteFunc, postExecuteFunc, postEnqueueFunc, postDequeueFunc, t)
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}
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func newApfServerWithHooks(decision mockDecision, onExecute, postExecute, postEnqueue, postDequeue func(), t *testing.T) *httptest.Server {
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requestInfoFactory := &apirequest.RequestInfoFactory{APIPrefixes: sets.NewString("apis", "api"), GrouplessAPIPrefixes: sets.NewString("api")}
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longRunningRequestCheck := BasicLongRunningRequestCheck(sets.NewString("watch"), sets.NewString("proxy"))
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apfHandler := WithPriorityAndFairness(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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onExecute()
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}), longRunningRequestCheck, fakeApfFilter{
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mockDecision: decision,
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postEnqueue: postEnqueue,
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postDequeue: postDequeue,
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})
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handler := apifilters.WithRequestInfo(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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r = r.WithContext(apirequest.WithUser(r.Context(), &user.DefaultInfo{
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Groups: []string{user.AllUnauthenticated},
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}))
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apfHandler.ServeHTTP(w, r)
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postExecute()
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if atomicReadOnlyExecuting != 0 {
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t.Errorf("Wanted %d requests executing, got %d", 0, atomicReadOnlyExecuting)
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}
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}), requestInfoFactory)
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apfServer := httptest.NewServer(handler)
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return apfServer
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}
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func TestApfSkipLongRunningRequest(t *testing.T) {
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epmetrics.Register()
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server := newApfServerWithSingleRequest(decisionSkipFilter, t)
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defer server.Close()
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// send a watch request to test skipping long running request
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if err := expectHTTPGet(fmt.Sprintf("%s/api/v1/namespaces?watch=true", server.URL), http.StatusOK); err != nil {
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// request should not be rejected
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t.Error(err)
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}
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}
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func TestApfRejectRequest(t *testing.T) {
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epmetrics.Register()
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server := newApfServerWithSingleRequest(decisionReject, t)
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defer server.Close()
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if err := expectHTTPGet(fmt.Sprintf("%s/api/v1/namespaces/default", server.URL), http.StatusTooManyRequests); err != nil {
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t.Error(err)
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}
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checkForExpectedMetricsWithRetry(t, []string{
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"apiserver_request_terminations_total",
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"apiserver_dropped_requests_total",
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})
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}
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func TestApfExemptRequest(t *testing.T) {
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epmetrics.Register()
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fcmetrics.Register()
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// Wait for at least one sampling window to pass since creation of metrics.ReadWriteConcurrencyObserverPairGenerator,
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// so that an observation will cause some data to go into the Prometheus metrics.
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time.Sleep(time.Millisecond * 50)
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server := newApfServerWithSingleRequest(decisionNoQueuingExecute, t)
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defer server.Close()
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if err := expectHTTPGet(fmt.Sprintf("%s/api/v1/namespaces/default", server.URL), http.StatusOK); err != nil {
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t.Error(err)
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}
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checkForExpectedMetricsWithRetry(t, []string{
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"apiserver_current_inflight_requests",
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"apiserver_flowcontrol_read_vs_write_request_count_watermarks",
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"apiserver_flowcontrol_read_vs_write_request_count_samples",
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})
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}
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func TestApfExecuteRequest(t *testing.T) {
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epmetrics.Register()
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fcmetrics.Register()
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// Wait for at least one sampling window to pass since creation of metrics.ReadWriteConcurrencyObserverPairGenerator,
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// so that an observation will cause some data to go into the Prometheus metrics.
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time.Sleep(time.Millisecond * 50)
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server := newApfServerWithSingleRequest(decisionQueuingExecute, t)
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defer server.Close()
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if err := expectHTTPGet(fmt.Sprintf("%s/api/v1/namespaces/default", server.URL), http.StatusOK); err != nil {
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t.Error(err)
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}
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checkForExpectedMetricsWithRetry(t, []string{
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"apiserver_current_inflight_requests",
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"apiserver_current_inqueue_requests",
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"apiserver_flowcontrol_read_vs_write_request_count_watermarks",
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"apiserver_flowcontrol_read_vs_write_request_count_samples",
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})
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}
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func TestApfExecuteMultipleRequests(t *testing.T) {
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epmetrics.Register()
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fcmetrics.Register()
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// Wait for at least one sampling window to pass since creation of metrics.ReadWriteConcurrencyObserverPairGenerator,
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// so that an observation will cause some data to go into the Prometheus metrics.
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time.Sleep(time.Millisecond * 50)
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concurrentRequests := 5
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var preStartExecute, postStartExecute, preEnqueue, postEnqueue, preDequeue, postDequeue, finishExecute sync.WaitGroup
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for _, wg := range []*sync.WaitGroup{&preStartExecute, &postStartExecute, &preEnqueue, &postEnqueue, &preDequeue, &postDequeue, &finishExecute} {
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wg.Add(concurrentRequests)
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}
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onExecuteFunc := func() {
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preStartExecute.Done()
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preStartExecute.Wait()
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if int(atomicReadOnlyExecuting) != concurrentRequests {
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t.Errorf("Wanted %d requests executing, got %d", concurrentRequests, atomicReadOnlyExecuting)
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}
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postStartExecute.Done()
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postStartExecute.Wait()
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}
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postEnqueueFunc := func() {
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preEnqueue.Done()
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preEnqueue.Wait()
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if int(atomicReadOnlyWaiting) != concurrentRequests {
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t.Errorf("Wanted %d requests in queue, got %d", 1, atomicReadOnlyWaiting)
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}
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postEnqueue.Done()
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postEnqueue.Wait()
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}
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postDequeueFunc := func() {
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preDequeue.Done()
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preDequeue.Wait()
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if atomicReadOnlyWaiting != 0 {
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t.Errorf("Wanted %d requests in queue, got %d", 0, atomicReadOnlyWaiting)
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}
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postDequeue.Done()
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postDequeue.Wait()
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}
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postExecuteFunc := func() {
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finishExecute.Done()
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finishExecute.Wait()
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}
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server := newApfServerWithHooks(decisionQueuingExecute, onExecuteFunc, postExecuteFunc, postEnqueueFunc, postDequeueFunc, t)
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defer server.Close()
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for i := 0; i < concurrentRequests; i++ {
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var err error
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go func() {
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err = expectHTTPGet(fmt.Sprintf("%s/api/v1/namespaces/default", server.URL), http.StatusOK)
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}()
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if err != nil {
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t.Error(err)
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}
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}
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checkForExpectedMetricsWithRetry(t, []string{
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"apiserver_current_inflight_requests",
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"apiserver_current_inqueue_requests",
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"apiserver_flowcontrol_read_vs_write_request_count_watermarks",
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"apiserver_flowcontrol_read_vs_write_request_count_samples",
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})
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}
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func TestApfCancelWaitRequest(t *testing.T) {
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epmetrics.Register()
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server := newApfServerWithSingleRequest(decisionCancelWait, t)
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defer server.Close()
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if err := expectHTTPGet(fmt.Sprintf("%s/api/v1/namespaces/default", server.URL), http.StatusTooManyRequests); err != nil {
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t.Error(err)
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}
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|
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checkForExpectedMetricsWithRetry(t, []string{
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"apiserver_current_inflight_requests",
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"apiserver_request_terminations_total",
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"apiserver_dropped_requests_total",
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})
|
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}
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|
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// wait async metrics to be collected
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func checkForExpectedMetricsWithRetry(t *testing.T, expectedMetrics []string) {
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maxRetries := 5
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var checkErrors []error
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for i := 0; i < maxRetries; i++ {
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t.Logf("Check for expected metrics with retry %d", i)
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metricsFamily, err := legacyregistry.DefaultGatherer.Gather()
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if err != nil {
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t.Fatalf("Failed to gather metrics %v", err)
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}
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|
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metrics := map[string]interface{}{}
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for _, mf := range metricsFamily {
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metrics[*mf.Name] = mf
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}
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|
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checkErrors = checkForExpectedMetrics(expectedMetrics, metrics)
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if checkErrors == nil {
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return
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}
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|
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time.Sleep(1 * time.Second)
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}
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for _, checkError := range checkErrors {
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t.Error(checkError)
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}
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}
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|
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func checkForExpectedMetrics(expectedMetrics []string, metrics map[string]interface{}) []error {
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var errs []error
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for _, metricName := range expectedMetrics {
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if _, ok := metrics[metricName]; !ok {
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if !ok {
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errs = append(errs, errors.New("Scraped metrics did not include expected metric "+metricName))
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}
|
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}
|
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}
|
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return errs
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}
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