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manager_test.go
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manager_test.go
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/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package manager
import (
"context"
"errors"
"fmt"
"io/ioutil"
"net"
"net/http"
"path"
"sync"
"sync/atomic"
"time"
"github.com/go-logr/logr"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/goleak"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/leaderelection/resourcelock"
configv1alpha1 "k8s.io/component-base/config/v1alpha1"
"sigs.k8s.io/controller-runtime/pkg/cache"
"sigs.k8s.io/controller-runtime/pkg/cache/informertest"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/cluster"
"sigs.k8s.io/controller-runtime/pkg/config/v1alpha1"
intrec "sigs.k8s.io/controller-runtime/pkg/internal/recorder"
"sigs.k8s.io/controller-runtime/pkg/leaderelection"
fakeleaderelection "sigs.k8s.io/controller-runtime/pkg/leaderelection/fake"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/metrics"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/recorder"
"sigs.k8s.io/controller-runtime/pkg/runtime/inject"
"sigs.k8s.io/controller-runtime/pkg/webhook"
)
var _ = Describe("manger.Manager", func() {
Describe("New", func() {
It("should return an error if there is no Config", func() {
m, err := New(nil, Options{})
Expect(m).To(BeNil())
Expect(err.Error()).To(ContainSubstring("must specify Config"))
})
It("should return an error if it can't create a RestMapper", func() {
expected := fmt.Errorf("expected error: RestMapper")
m, err := New(cfg, Options{
MapperProvider: func(c *rest.Config) (meta.RESTMapper, error) { return nil, expected },
})
Expect(m).To(BeNil())
Expect(err).To(Equal(expected))
})
It("should return an error it can't create a client.Client", func() {
m, err := New(cfg, Options{
NewClient: func(cache cache.Cache, config *rest.Config, options client.Options, uncachedObjects ...client.Object) (client.Client, error) {
return nil, errors.New("expected error")
},
})
Expect(m).To(BeNil())
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("expected error"))
})
It("should return an error it can't create a cache.Cache", func() {
m, err := New(cfg, Options{
NewCache: func(config *rest.Config, opts cache.Options) (cache.Cache, error) {
return nil, fmt.Errorf("expected error")
},
})
Expect(m).To(BeNil())
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("expected error"))
})
It("should create a client defined in by the new client function", func() {
m, err := New(cfg, Options{
NewClient: func(cache cache.Cache, config *rest.Config, options client.Options, uncachedObjects ...client.Object) (client.Client, error) {
return nil, nil
},
})
Expect(m).ToNot(BeNil())
Expect(err).ToNot(HaveOccurred())
Expect(m.GetClient()).To(BeNil())
})
It("should return an error it can't create a recorder.Provider", func() {
m, err := New(cfg, Options{
newRecorderProvider: func(_ *rest.Config, _ *runtime.Scheme, _ logr.Logger, _ intrec.EventBroadcasterProducer) (*intrec.Provider, error) {
return nil, fmt.Errorf("expected error")
},
})
Expect(m).To(BeNil())
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("expected error"))
})
It("should be able to load Options from cfg.ControllerManagerConfiguration type", func() {
duration := metav1.Duration{Duration: 48 * time.Hour}
port := int(6090)
leaderElect := false
ccfg := &v1alpha1.ControllerManagerConfiguration{
ControllerManagerConfigurationSpec: v1alpha1.ControllerManagerConfigurationSpec{
SyncPeriod: &duration,
LeaderElection: &configv1alpha1.LeaderElectionConfiguration{
LeaderElect: &leaderElect,
ResourceLock: "leases",
ResourceNamespace: "default",
ResourceName: "ctrl-lease",
LeaseDuration: duration,
RenewDeadline: duration,
RetryPeriod: duration,
},
CacheNamespace: "default",
Metrics: v1alpha1.ControllerMetrics{
BindAddress: ":6000",
},
Health: v1alpha1.ControllerHealth{
HealthProbeBindAddress: "6060",
ReadinessEndpointName: "/readyz",
LivenessEndpointName: "/livez",
},
Webhook: v1alpha1.ControllerWebhook{
Port: &port,
Host: "localhost",
CertDir: "/certs",
},
},
}
m, err := Options{}.AndFrom(&fakeDeferredLoader{ccfg})
Expect(err).To(BeNil())
Expect(*m.SyncPeriod).To(Equal(duration.Duration))
Expect(m.LeaderElection).To(Equal(leaderElect))
Expect(m.LeaderElectionResourceLock).To(Equal("leases"))
Expect(m.LeaderElectionNamespace).To(Equal("default"))
Expect(m.LeaderElectionID).To(Equal("ctrl-lease"))
Expect(m.LeaseDuration.String()).To(Equal(duration.Duration.String()))
Expect(m.RenewDeadline.String()).To(Equal(duration.Duration.String()))
Expect(m.RetryPeriod.String()).To(Equal(duration.Duration.String()))
Expect(m.Namespace).To(Equal("default"))
Expect(m.MetricsBindAddress).To(Equal(":6000"))
Expect(m.HealthProbeBindAddress).To(Equal("6060"))
Expect(m.ReadinessEndpointName).To(Equal("/readyz"))
Expect(m.LivenessEndpointName).To(Equal("/livez"))
Expect(m.Port).To(Equal(port))
Expect(m.Host).To(Equal("localhost"))
Expect(m.CertDir).To(Equal("/certs"))
})
It("should be able to keep Options when cfg.ControllerManagerConfiguration set", func() {
optDuration := time.Duration(2)
duration := metav1.Duration{Duration: 48 * time.Hour}
port := int(6090)
leaderElect := false
ccfg := &v1alpha1.ControllerManagerConfiguration{
ControllerManagerConfigurationSpec: v1alpha1.ControllerManagerConfigurationSpec{
SyncPeriod: &duration,
LeaderElection: &configv1alpha1.LeaderElectionConfiguration{
LeaderElect: &leaderElect,
ResourceLock: "leases",
ResourceNamespace: "default",
ResourceName: "ctrl-lease",
LeaseDuration: duration,
RenewDeadline: duration,
RetryPeriod: duration,
},
CacheNamespace: "default",
Metrics: v1alpha1.ControllerMetrics{
BindAddress: ":6000",
},
Health: v1alpha1.ControllerHealth{
HealthProbeBindAddress: "6060",
ReadinessEndpointName: "/readyz",
LivenessEndpointName: "/livez",
},
Webhook: v1alpha1.ControllerWebhook{
Port: &port,
Host: "localhost",
CertDir: "/certs",
},
},
}
m, err := Options{
SyncPeriod: &optDuration,
LeaderElection: true,
LeaderElectionResourceLock: "configmaps",
LeaderElectionNamespace: "ctrl",
LeaderElectionID: "ctrl-configmap",
LeaseDuration: &optDuration,
RenewDeadline: &optDuration,
RetryPeriod: &optDuration,
Namespace: "ctrl",
MetricsBindAddress: ":7000",
HealthProbeBindAddress: "5000",
ReadinessEndpointName: "/readiness",
LivenessEndpointName: "/liveness",
Port: 8080,
Host: "example.com",
CertDir: "/pki",
}.AndFrom(&fakeDeferredLoader{ccfg})
Expect(err).To(BeNil())
Expect(m.SyncPeriod.String()).To(Equal(optDuration.String()))
Expect(m.LeaderElection).To(Equal(true))
Expect(m.LeaderElectionResourceLock).To(Equal("configmaps"))
Expect(m.LeaderElectionNamespace).To(Equal("ctrl"))
Expect(m.LeaderElectionID).To(Equal("ctrl-configmap"))
Expect(m.LeaseDuration.String()).To(Equal(optDuration.String()))
Expect(m.RenewDeadline.String()).To(Equal(optDuration.String()))
Expect(m.RetryPeriod.String()).To(Equal(optDuration.String()))
Expect(m.Namespace).To(Equal("ctrl"))
Expect(m.MetricsBindAddress).To(Equal(":7000"))
Expect(m.HealthProbeBindAddress).To(Equal("5000"))
Expect(m.ReadinessEndpointName).To(Equal("/readiness"))
Expect(m.LivenessEndpointName).To(Equal("/liveness"))
Expect(m.Port).To(Equal(8080))
Expect(m.Host).To(Equal("example.com"))
Expect(m.CertDir).To(Equal("/pki"))
})
It("should lazily initialize a webhook server if needed", func() {
By("creating a manager with options")
m, err := New(cfg, Options{Port: 9440, Host: "foo.com"})
Expect(err).NotTo(HaveOccurred())
Expect(m).NotTo(BeNil())
By("checking options are passed to the webhook server")
svr := m.GetWebhookServer()
Expect(svr).NotTo(BeNil())
Expect(svr.Port).To(Equal(9440))
Expect(svr.Host).To(Equal("foo.com"))
})
It("should not initialize a webhook server if Options.WebhookServer is set", func() {
By("creating a manager with options")
m, err := New(cfg, Options{Port: 9441, WebhookServer: &webhook.Server{Port: 9440}})
Expect(err).NotTo(HaveOccurred())
Expect(m).NotTo(BeNil())
By("checking the server contains the Port set on the webhook server and not passed to Options")
svr := m.GetWebhookServer()
Expect(svr).NotTo(BeNil())
Expect(svr.Port).To(Equal(9440))
})
Context("with leader election enabled", func() {
It("should only cancel the leader election after all runnables are done", func() {
m, err := New(cfg, Options{
LeaderElection: true,
LeaderElectionNamespace: "default",
LeaderElectionID: "test-leader-election-id-2",
HealthProbeBindAddress: "0",
MetricsBindAddress: "0",
})
Expect(err).To(BeNil())
runnableDone := make(chan struct{})
slowRunnable := RunnableFunc(func(ctx context.Context) error {
<-ctx.Done()
time.Sleep(100 * time.Millisecond)
close(runnableDone)
return nil
})
Expect(m.Add(slowRunnable)).To(BeNil())
cm := m.(*controllerManager)
cm.gracefulShutdownTimeout = time.Second
leaderElectionDone := make(chan struct{})
cm.onStoppedLeading = func() {
close(leaderElectionDone)
}
ctx, cancel := context.WithCancel(context.Background())
mgrDone := make(chan struct{})
go func() {
defer GinkgoRecover()
Expect(m.Start(ctx)).To(BeNil())
close(mgrDone)
}()
<-cm.elected
cancel()
select {
case <-leaderElectionDone:
Expect(errors.New("leader election was cancelled before runnables were done")).ToNot(HaveOccurred())
case <-runnableDone:
// Success
}
// Don't leak routines
<-mgrDone
})
It("should disable gracefulShutdown when stopping to lead", func() {
m, err := New(cfg, Options{
LeaderElection: true,
LeaderElectionNamespace: "default",
LeaderElectionID: "test-leader-election-id-3",
HealthProbeBindAddress: "0",
MetricsBindAddress: "0",
})
Expect(err).To(BeNil())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
mgrDone := make(chan struct{})
go func() {
defer GinkgoRecover()
err := m.Start(ctx)
Expect(err).ToNot(BeNil())
Expect(err.Error()).To(Equal("leader election lost"))
close(mgrDone)
}()
cm := m.(*controllerManager)
<-cm.elected
cm.leaderElectionCancel()
<-mgrDone
Expect(cm.gracefulShutdownTimeout.Nanoseconds()).To(Equal(int64(0)))
})
It("should default ID to controller-runtime if ID is not set", func() {
var rl resourcelock.Interface
m1, err := New(cfg, Options{
LeaderElection: true,
LeaderElectionNamespace: "default",
LeaderElectionID: "test-leader-election-id",
newResourceLock: func(config *rest.Config, recorderProvider recorder.Provider, options leaderelection.Options) (resourcelock.Interface, error) {
var err error
rl, err = leaderelection.NewResourceLock(config, recorderProvider, options)
return rl, err
},
HealthProbeBindAddress: "0",
MetricsBindAddress: "0",
})
Expect(err).ToNot(HaveOccurred())
Expect(m1).ToNot(BeNil())
Expect(rl.Describe()).To(Equal("default/test-leader-election-id"))
m1cm, ok := m1.(*controllerManager)
Expect(ok).To(BeTrue())
m1cm.onStoppedLeading = func() {}
m2, err := New(cfg, Options{
LeaderElection: true,
LeaderElectionNamespace: "default",
LeaderElectionID: "test-leader-election-id",
newResourceLock: func(config *rest.Config, recorderProvider recorder.Provider, options leaderelection.Options) (resourcelock.Interface, error) {
var err error
rl, err = leaderelection.NewResourceLock(config, recorderProvider, options)
return rl, err
},
HealthProbeBindAddress: "0",
MetricsBindAddress: "0",
})
Expect(err).ToNot(HaveOccurred())
Expect(m2).ToNot(BeNil())
Expect(rl.Describe()).To(Equal("default/test-leader-election-id"))
m2cm, ok := m2.(*controllerManager)
Expect(ok).To(BeTrue())
m2cm.onStoppedLeading = func() {}
c1 := make(chan struct{})
Expect(m1.Add(RunnableFunc(func(ctx context.Context) error {
defer GinkgoRecover()
close(c1)
return nil
}))).To(Succeed())
ctx1, cancel1 := context.WithCancel(context.Background())
defer cancel1()
go func() {
defer GinkgoRecover()
Expect(m1.Elected()).ShouldNot(BeClosed())
Expect(m1.Start(ctx1)).NotTo(HaveOccurred())
Expect(m1.Elected()).Should(BeClosed())
}()
<-c1
c2 := make(chan struct{})
Expect(m2.Add(RunnableFunc(func(context.Context) error {
defer GinkgoRecover()
close(c2)
return nil
}))).To(Succeed())
ctx2, cancel := context.WithCancel(context.Background())
m2done := make(chan struct{})
go func() {
defer GinkgoRecover()
Expect(m2.Start(ctx2)).NotTo(HaveOccurred())
close(m2done)
}()
Consistently(m2.Elected()).ShouldNot(Receive())
Consistently(c2).ShouldNot(Receive())
cancel()
<-m2done
})
It("should return an error if it can't create a ResourceLock", func() {
m, err := New(cfg, Options{
newResourceLock: func(_ *rest.Config, _ recorder.Provider, _ leaderelection.Options) (resourcelock.Interface, error) {
return nil, fmt.Errorf("expected error")
},
})
Expect(m).To(BeNil())
Expect(err).To(MatchError(ContainSubstring("expected error")))
})
It("should return an error if namespace not set and not running in cluster", func() {
m, err := New(cfg, Options{LeaderElection: true, LeaderElectionID: "controller-runtime"})
Expect(m).To(BeNil())
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("unable to find leader election namespace: not running in-cluster, please specify LeaderElectionNamespace"))
})
// We must keep this default until we are sure all controller-runtime users have upgraded from the original default
// ConfigMap lock to a controller-runtime version that has this new default. Many users of controller-runtime skip
// versions, so we should be extremely conservative here.
It("should default to ConfigMapsLeasesResourceLock", func() {
m, err := New(cfg, Options{LeaderElection: true, LeaderElectionID: "controller-runtime", LeaderElectionNamespace: "my-ns"})
Expect(m).ToNot(BeNil())
Expect(err).ToNot(HaveOccurred())
cm, ok := m.(*controllerManager)
Expect(ok).To(BeTrue())
multilock, isMultiLock := cm.resourceLock.(*resourcelock.MultiLock)
Expect(isMultiLock).To(BeTrue())
_, primaryIsConfigMapLock := multilock.Primary.(*resourcelock.ConfigMapLock)
Expect(primaryIsConfigMapLock).To(BeTrue())
_, secondaryIsLeaseLock := multilock.Secondary.(*resourcelock.LeaseLock)
Expect(secondaryIsLeaseLock).To(BeTrue())
})
It("should use the specified ResourceLock", func() {
m, err := New(cfg, Options{
LeaderElection: true,
LeaderElectionResourceLock: resourcelock.LeasesResourceLock,
LeaderElectionID: "controller-runtime",
LeaderElectionNamespace: "my-ns",
})
Expect(m).ToNot(BeNil())
Expect(err).ToNot(HaveOccurred())
cm, ok := m.(*controllerManager)
Expect(ok).To(BeTrue())
_, isLeaseLock := cm.resourceLock.(*resourcelock.LeaseLock)
Expect(isLeaseLock).To(BeTrue())
})
It("should release lease if ElectionReleaseOnCancel is true", func() {
var rl resourcelock.Interface
m, err := New(cfg, Options{
LeaderElection: true,
LeaderElectionResourceLock: resourcelock.LeasesResourceLock,
LeaderElectionID: "controller-runtime",
LeaderElectionNamespace: "my-ns",
LeaderElectionReleaseOnCancel: true,
newResourceLock: func(config *rest.Config, recorderProvider recorder.Provider, options leaderelection.Options) (resourcelock.Interface, error) {
var err error
rl, err = fakeleaderelection.NewResourceLock(config, recorderProvider, options)
return rl, err
},
})
Expect(err).To(BeNil())
ctx, cancel := context.WithCancel(context.Background())
doneCh := make(chan struct{})
go func() {
defer GinkgoRecover()
defer close(doneCh)
Expect(m.Start(ctx)).NotTo(HaveOccurred())
}()
<-m.(*controllerManager).elected
cancel()
<-doneCh
ctx, cancel = context.WithCancel(context.Background())
defer cancel()
record, _, err := rl.Get(ctx)
Expect(err).To(BeNil())
Expect(record.HolderIdentity).To(BeEmpty())
})
})
It("should create a listener for the metrics if a valid address is provided", func() {
var listener net.Listener
m, err := New(cfg, Options{
MetricsBindAddress: ":0",
newMetricsListener: func(addr string) (net.Listener, error) {
var err error
listener, err = metrics.NewListener(addr)
return listener, err
},
})
Expect(m).ToNot(BeNil())
Expect(err).ToNot(HaveOccurred())
Expect(listener).ToNot(BeNil())
Expect(listener.Close()).ToNot(HaveOccurred())
})
It("should return an error if the metrics bind address is already in use", func() {
ln, err := metrics.NewListener(":0")
Expect(err).ShouldNot(HaveOccurred())
var listener net.Listener
m, err := New(cfg, Options{
MetricsBindAddress: ln.Addr().String(),
newMetricsListener: func(addr string) (net.Listener, error) {
var err error
listener, err = metrics.NewListener(addr)
return listener, err
},
})
Expect(m).To(BeNil())
Expect(err).To(HaveOccurred())
Expect(listener).To(BeNil())
Expect(ln.Close()).ToNot(HaveOccurred())
})
It("should create a listener for the health probes if a valid address is provided", func() {
var listener net.Listener
m, err := New(cfg, Options{
HealthProbeBindAddress: ":0",
newHealthProbeListener: func(addr string) (net.Listener, error) {
var err error
listener, err = defaultHealthProbeListener(addr)
return listener, err
},
})
Expect(m).ToNot(BeNil())
Expect(err).ToNot(HaveOccurred())
Expect(listener).ToNot(BeNil())
Expect(listener.Close()).ToNot(HaveOccurred())
})
It("should return an error if the health probes bind address is already in use", func() {
ln, err := defaultHealthProbeListener(":0")
Expect(err).ShouldNot(HaveOccurred())
var listener net.Listener
m, err := New(cfg, Options{
HealthProbeBindAddress: ln.Addr().String(),
newHealthProbeListener: func(addr string) (net.Listener, error) {
var err error
listener, err = defaultHealthProbeListener(addr)
return listener, err
},
})
Expect(m).To(BeNil())
Expect(err).To(HaveOccurred())
Expect(listener).To(BeNil())
Expect(ln.Close()).ToNot(HaveOccurred())
})
})
Describe("Start", func() {
var startSuite = func(options Options, callbacks ...func(Manager)) {
It("should Start each Component", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
var wgRunnableStarted sync.WaitGroup
wgRunnableStarted.Add(2)
Expect(m.Add(RunnableFunc(func(context.Context) error {
defer GinkgoRecover()
wgRunnableStarted.Done()
return nil
}))).To(Succeed())
Expect(m.Add(RunnableFunc(func(context.Context) error {
defer GinkgoRecover()
wgRunnableStarted.Done()
return nil
}))).To(Succeed())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go func() {
defer GinkgoRecover()
Expect(m.Elected()).ShouldNot(BeClosed())
Expect(m.Start(ctx)).NotTo(HaveOccurred())
Expect(m.Elected()).Should(BeClosed())
}()
wgRunnableStarted.Wait()
})
It("should not manipulate the provided config", func() {
// strip WrapTransport, cause func values are PartialEq, not Eq --
// specifically, for reflect.DeepEqual, for all functions F,
// F != nil implies F != F, which means no full equivalence relation.
cfg := rest.CopyConfig(cfg)
cfg.WrapTransport = nil
originalCfg := rest.CopyConfig(cfg)
// The options object is shared by multiple tests, copy it
// into our scope so we manipulate it for this testcase only
options := options
options.newResourceLock = nil
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
Expect(m.GetConfig()).To(Equal(originalCfg))
})
It("should stop when context is cancelled", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
ctx, cancel := context.WithCancel(context.Background())
cancel()
Expect(m.Start(ctx)).NotTo(HaveOccurred())
})
It("should return an error if it can't start the cache", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
mgr, ok := m.(*controllerManager)
Expect(ok).To(BeTrue())
mgr.caches = []hasCache{&cacheProvider{cache: &informertest.FakeInformers{Error: fmt.Errorf("expected error")}}}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
Expect(m.Start(ctx)).To(MatchError(ContainSubstring("expected error")))
})
It("should start the cache before starting anything else", func() {
fakeCache := &startSignalingInformer{Cache: &informertest.FakeInformers{}}
options.NewCache = func(_ *rest.Config, _ cache.Options) (cache.Cache, error) {
return fakeCache, nil
}
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
runnableWasStarted := make(chan struct{})
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
defer GinkgoRecover()
if !fakeCache.wasSynced {
return errors.New("runnable got started before cache was synced")
}
close(runnableWasStarted)
return nil
}))).To(Succeed())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go func() {
defer GinkgoRecover()
Expect(m.Start(ctx)).ToNot(HaveOccurred())
}()
<-runnableWasStarted
})
It("should start additional clusters before anything else", func() {
fakeCache := &startSignalingInformer{Cache: &informertest.FakeInformers{}}
options.NewCache = func(_ *rest.Config, _ cache.Options) (cache.Cache, error) {
return fakeCache, nil
}
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
additionalClusterCache := &startSignalingInformer{Cache: &informertest.FakeInformers{}}
additionalCluster, err := cluster.New(cfg, func(o *cluster.Options) {
o.NewCache = func(_ *rest.Config, _ cache.Options) (cache.Cache, error) {
return additionalClusterCache, nil
}
})
Expect(err).NotTo(HaveOccurred())
Expect(m.Add(additionalCluster)).NotTo(HaveOccurred())
runnableWasStarted := make(chan struct{})
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
defer GinkgoRecover()
if !fakeCache.wasSynced {
return errors.New("WaitForCacheSyncCalled wasn't called before Runnable got started")
}
if !additionalClusterCache.wasSynced {
return errors.New("the additional clusters WaitForCacheSync wasn't called before Runnable got started")
}
close(runnableWasStarted)
return nil
}))).To(Succeed())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go func() {
defer GinkgoRecover()
Expect(m.Start(ctx)).ToNot(HaveOccurred())
}()
<-runnableWasStarted
})
It("should return an error if any Components fail to Start", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
defer GinkgoRecover()
<-ctx.Done()
return nil
}))).To(Succeed())
Expect(m.Add(RunnableFunc(func(context.Context) error {
defer GinkgoRecover()
return fmt.Errorf("expected error")
}))).To(Succeed())
Expect(m.Add(RunnableFunc(func(context.Context) error {
defer GinkgoRecover()
return nil
}))).To(Succeed())
defer GinkgoRecover()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err = m.Start(ctx)
Expect(err).ToNot(BeNil())
Expect(err.Error()).To(Equal("expected error"))
})
It("should wait for runnables to stop", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
var lock sync.Mutex
var runnableDoneCount int64
runnableDoneFunc := func() {
lock.Lock()
defer lock.Unlock()
atomic.AddInt64(&runnableDoneCount, 1)
}
var wgRunnableRunning sync.WaitGroup
wgRunnableRunning.Add(2)
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
wgRunnableRunning.Done()
defer GinkgoRecover()
defer runnableDoneFunc()
<-ctx.Done()
return nil
}))).To(Succeed())
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
wgRunnableRunning.Done()
defer GinkgoRecover()
defer runnableDoneFunc()
<-ctx.Done()
time.Sleep(300 * time.Millisecond) // slow closure simulation
return nil
}))).To(Succeed())
defer GinkgoRecover()
ctx, cancel := context.WithCancel(context.Background())
var wgManagerRunning sync.WaitGroup
wgManagerRunning.Add(1)
go func() {
defer GinkgoRecover()
defer wgManagerRunning.Done()
Expect(m.Start(ctx)).NotTo(HaveOccurred())
Eventually(func() int64 {
return atomic.LoadInt64(&runnableDoneCount)
}).Should(BeEquivalentTo(2))
}()
wgRunnableRunning.Wait()
cancel()
wgManagerRunning.Wait()
})
It("should return an error if any Components fail to Start and wait for runnables to stop", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
defer GinkgoRecover()
var lock sync.Mutex
runnableDoneCount := 0
runnableDoneFunc := func() {
lock.Lock()
defer lock.Unlock()
runnableDoneCount++
}
Expect(m.Add(RunnableFunc(func(context.Context) error {
defer GinkgoRecover()
defer runnableDoneFunc()
return fmt.Errorf("expected error")
}))).To(Succeed())
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
defer GinkgoRecover()
defer runnableDoneFunc()
<-ctx.Done()
return nil
}))).To(Succeed())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
Expect(m.Start(ctx)).To(HaveOccurred())
Expect(runnableDoneCount).To(Equal(2))
})
It("should refuse to add runnable if stop procedure is already engaged", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
defer GinkgoRecover()
var wgRunnableRunning sync.WaitGroup
wgRunnableRunning.Add(1)
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
wgRunnableRunning.Done()
defer GinkgoRecover()
<-ctx.Done()
return nil
}))).To(Succeed())
ctx, cancel := context.WithCancel(context.Background())
go func() {
Expect(m.Start(ctx)).NotTo(HaveOccurred())
}()
wgRunnableRunning.Wait()
cancel()
time.Sleep(100 * time.Millisecond) // give some time for the stop chan closure to be caught by the manager
Expect(m.Add(RunnableFunc(func(context.Context) error {
defer GinkgoRecover()
return nil
}))).NotTo(Succeed())
})
It("should return both runnables and stop errors when both error", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
m.(*controllerManager).gracefulShutdownTimeout = 1 * time.Nanosecond
Expect(m.Add(RunnableFunc(func(context.Context) error {
return runnableError{}
})))
testDone := make(chan struct{})
defer close(testDone)
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
<-ctx.Done()
timer := time.NewTimer(30 * time.Second)
defer timer.Stop()
select {
case <-testDone:
return nil
case <-timer.C:
return nil
}
})))
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err = m.Start(ctx)
Expect(err).ToNot(BeNil())
eMsg := "[not feeling like that, failed waiting for all runnables to end within grace period of 1ns: context deadline exceeded]"
Expect(err.Error()).To(Equal(eMsg))
Expect(errors.Is(err, context.DeadlineExceeded)).To(BeTrue())
Expect(errors.Is(err, runnableError{})).To(BeTrue())
})
It("should return only stop errors if runnables dont error", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
m.(*controllerManager).gracefulShutdownTimeout = 1 * time.Nanosecond
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
<-ctx.Done()
return nil
})))
testDone := make(chan struct{})
defer close(testDone)
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
<-ctx.Done()
timer := time.NewTimer(30 * time.Second)
defer timer.Stop()
select {
case <-testDone:
return nil
case <-timer.C:
return nil
}
}))).NotTo(HaveOccurred())
ctx, cancel := context.WithCancel(context.Background())
managerStopDone := make(chan struct{})
go func() { err = m.Start(ctx); close(managerStopDone) }()
// Use the 'elected' channel to find out if startup was done, otherwise we stop
// before we started the Runnable and see flakes, mostly in low-CPU envs like CI
<-m.(*controllerManager).elected
cancel()
<-managerStopDone
Expect(err).ToNot(BeNil())
Expect(err.Error()).To(Equal("failed waiting for all runnables to end within grace period of 1ns: context deadline exceeded"))
Expect(errors.Is(err, context.DeadlineExceeded)).To(BeTrue())
Expect(errors.Is(err, runnableError{})).ToNot(BeTrue())
})
It("should return only runnables error if stop doesn't error", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
Expect(m.Add(RunnableFunc(func(context.Context) error {
return runnableError{}
})))
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err = m.Start(ctx)
Expect(err).ToNot(BeNil())
Expect(err.Error()).To(Equal("not feeling like that"))
Expect(errors.Is(err, context.DeadlineExceeded)).ToNot(BeTrue())
Expect(errors.Is(err, runnableError{})).To(BeTrue())
})
It("should not wait for runnables if gracefulShutdownTimeout is 0", func() {
m, err := New(cfg, options)
Expect(err).NotTo(HaveOccurred())
for _, cb := range callbacks {
cb(m)
}
m.(*controllerManager).gracefulShutdownTimeout = time.Duration(0)
runnableStopped := make(chan struct{})
Expect(m.Add(RunnableFunc(func(ctx context.Context) error {
<-ctx.Done()
time.Sleep(100 * time.Millisecond)
close(runnableStopped)
return nil
}))).ToNot(HaveOccurred())
ctx, cancel := context.WithCancel(context.Background())
managerStopDone := make(chan struct{})
go func() {
Expect(m.Start(ctx)).NotTo(HaveOccurred())
close(managerStopDone)
}()
<-m.(*controllerManager).elected
cancel()
<-managerStopDone
<-runnableStopped