Update dependencies to v0.27.5 tag

Automated cherry pick of #118150 origin release 1.27

Kubernetes-commit: 55872a8eb12e1621e72121b18c15fef1f54a76ff

OWNERS

@@ -1,9 +1,11 @@
 # See the OWNERS docs at https://go.k8s.io/owners
 
 approvers:
+  - deads2k
   - sttts
   - munnerz
 reviewers:
+  - deads2k
   - sttts
   - munnerz
   - nikhita

README.md

@@ -126,6 +126,8 @@ type User struct {
 }
 ```
 
+Note, the JSON tag `json:` is required on all user facing fields within your type. Typically API types contain only user facing fields. When the JSON tag is omitted from the field, Kubernetes generators consider the field to be internal and will not expose the field in their generated external output. For example, this means that the field would not be included in a generated CRD schema.
+
 ## Validation
 
 To validate custom resources, use the [`CustomResourceValidation`](https://kubernetes.io/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#validation) feature. Validation in the form of a [structured schema](https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#specifying-a-structural-schema) is mandatory to be provided for `apiextensions.k8s.io/v1`.

controller.go

@@ -86,16 +86,19 @@ type Controller struct {
 
 // NewController returns a new sample controller
 func NewController(
+	ctx context.Context,
 	kubeclientset kubernetes.Interface,
 	sampleclientset clientset.Interface,
 	deploymentInformer appsinformers.DeploymentInformer,
 	fooInformer informers.FooInformer) *Controller {
+	logger := klog.FromContext(ctx)
 
 	// Create event broadcaster
 	// Add sample-controller types to the default Kubernetes Scheme so Events can be
 	// logged for sample-controller types.
 	utilruntime.Must(samplescheme.AddToScheme(scheme.Scheme))
-	klog.V(4).Info("Creating event broadcaster")
+	logger.V(4).Info("Creating event broadcaster")
+
 	eventBroadcaster := record.NewBroadcaster()
 	eventBroadcaster.StartStructuredLogging(0)
 	eventBroadcaster.StartRecordingToSink(&typedcorev1.EventSinkImpl{Interface: kubeclientset.CoreV1().Events("")})
@@ -112,7 +115,7 @@ func NewController(
 		recorder:          recorder,
 	}
 
-	klog.Info("Setting up event handlers")
+	logger.Info("Setting up event handlers")
 	// Set up an event handler for when Foo resources change
 	fooInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
 		AddFunc: controller.enqueueFoo,
@@ -148,28 +151,30 @@ func NewController(
 // as syncing informer caches and starting workers. It will block until stopCh
 // is closed, at which point it will shutdown the workqueue and wait for
 // workers to finish processing their current work items.
-func (c *Controller) Run(workers int, stopCh <-chan struct{}) error {
+func (c *Controller) Run(ctx context.Context, workers int) error {
 	defer utilruntime.HandleCrash()
 	defer c.workqueue.ShutDown()
+	logger := klog.FromContext(ctx)
 
 	// Start the informer factories to begin populating the informer caches
-	klog.Info("Starting Foo controller")
+	logger.Info("Starting Foo controller")
 
 	// Wait for the caches to be synced before starting workers
-	klog.Info("Waiting for informer caches to sync")
-	if ok := cache.WaitForCacheSync(stopCh, c.deploymentsSynced, c.foosSynced); !ok {
+	logger.Info("Waiting for informer caches to sync")
+
+	if ok := cache.WaitForCacheSync(ctx.Done(), c.deploymentsSynced, c.foosSynced); !ok {
 		return fmt.Errorf("failed to wait for caches to sync")
 	}
 
-	klog.Info("Starting workers")
+	logger.Info("Starting workers", "count", workers)
 	// Launch two workers to process Foo resources
 	for i := 0; i < workers; i++ {
-		go wait.Until(c.runWorker, time.Second, stopCh)
+		go wait.UntilWithContext(ctx, c.runWorker, time.Second)
 	}
 
-	klog.Info("Started workers")
-	<-stopCh
-	klog.Info("Shutting down workers")
+	logger.Info("Started workers")
+	<-ctx.Done()
+	logger.Info("Shutting down workers")
 
 	return nil
 }
@@ -177,15 +182,16 @@ func (c *Controller) Run(workers int, stopCh <-chan struct{}) error {
 // runWorker is a long-running function that will continually call the
 // processNextWorkItem function in order to read and process a message on the
 // workqueue.
-func (c *Controller) runWorker() {
-	for c.processNextWorkItem() {
+func (c *Controller) runWorker(ctx context.Context) {
+	for c.processNextWorkItem(ctx) {
 	}
 }
 
 // processNextWorkItem will read a single work item off the workqueue and
 // attempt to process it, by calling the syncHandler.
-func (c *Controller) processNextWorkItem() bool {
+func (c *Controller) processNextWorkItem(ctx context.Context) bool {
 	obj, shutdown := c.workqueue.Get()
+	logger := klog.FromContext(ctx)
 
 	if shutdown {
 		return false
@@ -217,7 +223,7 @@ func (c *Controller) processNextWorkItem() bool {
 		}
 		// Run the syncHandler, passing it the namespace/name string of the
 		// Foo resource to be synced.
-		if err := c.syncHandler(key); err != nil {
+		if err := c.syncHandler(ctx, key); err != nil {
 			// Put the item back on the workqueue to handle any transient errors.
 			c.workqueue.AddRateLimited(key)
 			return fmt.Errorf("error syncing '%s': %s, requeuing", key, err.Error())
@@ -225,7 +231,7 @@ func (c *Controller) processNextWorkItem() bool {
 		// Finally, if no error occurs we Forget this item so it does not
 		// get queued again until another change happens.
 		c.workqueue.Forget(obj)
-		klog.Infof("Successfully synced '%s'", key)
+		logger.Info("Successfully synced", "resourceName", key)
 		return nil
 	}(obj)
 
@@ -240,8 +246,10 @@ func (c *Controller) processNextWorkItem() bool {
 // syncHandler compares the actual state with the desired, and attempts to
 // converge the two. It then updates the Status block of the Foo resource
 // with the current status of the resource.
-func (c *Controller) syncHandler(key string) error {
+func (c *Controller) syncHandler(ctx context.Context, key string) error {
 	// Convert the namespace/name string into a distinct namespace and name
+	logger := klog.LoggerWithValues(klog.FromContext(ctx), "resourceName", key)
+
 	namespace, name, err := cache.SplitMetaNamespaceKey(key)
 	if err != nil {
 		utilruntime.HandleError(fmt.Errorf("invalid resource key: %s", key))
@@ -296,7 +304,7 @@ func (c *Controller) syncHandler(key string) error {
 	// number does not equal the current desired replicas on the Deployment, we
 	// should update the Deployment resource.
 	if foo.Spec.Replicas != nil && *foo.Spec.Replicas != *deployment.Spec.Replicas {
-		klog.V(4).Infof("Foo %s replicas: %d, deployment replicas: %d", name, *foo.Spec.Replicas, *deployment.Spec.Replicas)
+		logger.V(4).Info("Update deployment resource", "currentReplicas", *foo.Spec.Replicas, "desiredReplicas", *deployment.Spec.Replicas)
 		deployment, err = c.kubeclientset.AppsV1().Deployments(foo.Namespace).Update(context.TODO(), newDeployment(foo), metav1.UpdateOptions{})
 	}
 
@@ -353,6 +361,7 @@ func (c *Controller) enqueueFoo(obj interface{}) {
 func (c *Controller) handleObject(obj interface{}) {
 	var object metav1.Object
 	var ok bool
+	logger := klog.FromContext(context.Background())
 	if object, ok = obj.(metav1.Object); !ok {
 		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
 		if !ok {
@@ -364,9 +373,9 @@ func (c *Controller) handleObject(obj interface{}) {
 			utilruntime.HandleError(fmt.Errorf("error decoding object tombstone, invalid type"))
 			return
 		}
-		klog.V(4).Infof("Recovered deleted object '%s' from tombstone", object.GetName())
+		logger.V(4).Info("Recovered deleted object", "resourceName", object.GetName())
 	}
-	klog.V(4).Infof("Processing object: %s", object.GetName())
+	logger.V(4).Info("Processing object", "object", klog.KObj(object))
 	if ownerRef := metav1.GetControllerOf(object); ownerRef != nil {
 		// If this object is not owned by a Foo, we should not do anything more
 		// with it.
@@ -376,7 +385,7 @@ func (c *Controller) handleObject(obj interface{}) {
 
 		foo, err := c.foosLister.Foos(object.GetNamespace()).Get(ownerRef.Name)
 		if err != nil {
-			klog.V(4).Infof("ignoring orphaned object '%s/%s' of foo '%s'", object.GetNamespace(), object.GetName(), ownerRef.Name)
+			logger.V(4).Info("Ignore orphaned object", "object", klog.KObj(object), "foo", ownerRef.Name)
 			return
 		}
 

controller_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package main
 
 import (
+	"context"
 	"fmt"
 	"reflect"
 	"testing"
@@ -32,6 +33,7 @@ import (
 	core "k8s.io/client-go/testing"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/record"
+	"k8s.io/klog/v2/ktesting"
 
 	samplecontroller "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
 	"k8s.io/sample-controller/pkg/generated/clientset/versioned/fake"
@@ -81,14 +83,14 @@ func newFoo(name string, replicas *int32) *samplecontroller.Foo {
 	}
 }
 
-func (f *fixture) newController() (*Controller, informers.SharedInformerFactory, kubeinformers.SharedInformerFactory) {
+func (f *fixture) newController(ctx context.Context) (*Controller, informers.SharedInformerFactory, kubeinformers.SharedInformerFactory) {
 	f.client = fake.NewSimpleClientset(f.objects...)
 	f.kubeclient = k8sfake.NewSimpleClientset(f.kubeobjects...)
 
 	i := informers.NewSharedInformerFactory(f.client, noResyncPeriodFunc())
 	k8sI := kubeinformers.NewSharedInformerFactory(f.kubeclient, noResyncPeriodFunc())
 
-	c := NewController(f.kubeclient, f.client,
+	c := NewController(ctx, f.kubeclient, f.client,
 		k8sI.Apps().V1().Deployments(), i.Samplecontroller().V1alpha1().Foos())
 
 	c.foosSynced = alwaysReady
@@ -106,24 +108,22 @@ func (f *fixture) newController() (*Controller, informers.SharedInformerFactory,
 	return c, i, k8sI
 }
 
-func (f *fixture) run(fooName string) {
-	f.runController(fooName, true, false)
+func (f *fixture) run(ctx context.Context, fooName string) {
+	f.runController(ctx, fooName, true, false)
 }
 
-func (f *fixture) runExpectError(fooName string) {
-	f.runController(fooName, true, true)
+func (f *fixture) runExpectError(ctx context.Context, fooName string) {
+	f.runController(ctx, fooName, true, true)
 }
 
-func (f *fixture) runController(fooName string, startInformers bool, expectError bool) {
-	c, i, k8sI := f.newController()
+func (f *fixture) runController(ctx context.Context, fooName string, startInformers bool, expectError bool) {
+	c, i, k8sI := f.newController(ctx)
 	if startInformers {
-		stopCh := make(chan struct{})
-		defer close(stopCh)
-		i.Start(stopCh)
-		k8sI.Start(stopCh)
+		i.Start(ctx.Done())
+		k8sI.Start(ctx.Done())
 	}
 
-	err := c.syncHandler(fooName)
+	err := c.syncHandler(ctx, fooName)
 	if !expectError && err != nil {
 		f.t.Errorf("error syncing foo: %v", err)
 	} else if expectError && err == nil {
@@ -252,6 +252,7 @@ func getKey(foo *samplecontroller.Foo, t *testing.T) string {
 func TestCreatesDeployment(t *testing.T) {
 	f := newFixture(t)
 	foo := newFoo("test", int32Ptr(1))
+	_, ctx := ktesting.NewTestContext(t)
 
 	f.fooLister = append(f.fooLister, foo)
 	f.objects = append(f.objects, foo)
@@ -260,12 +261,14 @@ func TestCreatesDeployment(t *testing.T) {
 	f.expectCreateDeploymentAction(expDeployment)
 	f.expectUpdateFooStatusAction(foo)
 
-	f.run(getKey(foo, t))
+	f.run(ctx, getKey(foo, t))
 }
 
 func TestDoNothing(t *testing.T) {
 	f := newFixture(t)
 	foo := newFoo("test", int32Ptr(1))
+	_, ctx := ktesting.NewTestContext(t)
+
 	d := newDeployment(foo)
 
 	f.fooLister = append(f.fooLister, foo)
@@ -274,12 +277,14 @@ func TestDoNothing(t *testing.T) {
 	f.kubeobjects = append(f.kubeobjects, d)
 
 	f.expectUpdateFooStatusAction(foo)
-	f.run(getKey(foo, t))
+	f.run(ctx, getKey(foo, t))
 }
 
 func TestUpdateDeployment(t *testing.T) {
 	f := newFixture(t)
 	foo := newFoo("test", int32Ptr(1))
+	_, ctx := ktesting.NewTestContext(t)
+
 	d := newDeployment(foo)
 
 	// Update replicas
@@ -293,12 +298,14 @@ func TestUpdateDeployment(t *testing.T) {
 
 	f.expectUpdateFooStatusAction(foo)
 	f.expectUpdateDeploymentAction(expDeployment)
-	f.run(getKey(foo, t))
+	f.run(ctx, getKey(foo, t))
 }
 
 func TestNotControlledByUs(t *testing.T) {
 	f := newFixture(t)
 	foo := newFoo("test", int32Ptr(1))
+	_, ctx := ktesting.NewTestContext(t)
+
 	d := newDeployment(foo)
 
 	d.ObjectMeta.OwnerReferences = []metav1.OwnerReference{}
@@ -308,7 +315,7 @@ func TestNotControlledByUs(t *testing.T) {
 	f.deploymentLister = append(f.deploymentLister, d)
 	f.kubeobjects = append(f.kubeobjects, d)
 
-	f.runExpectError(getKey(foo, t))
+	f.runExpectError(ctx, getKey(foo, t))
 }
 
 func int32Ptr(i int32) *int32 { return &i }

go.mod

@@ -2,65 +2,64 @@
 
 module k8s.io/sample-controller
 
-go 1.18
+go 1.20
 
 require (
-	k8s.io/api v0.0.0-20220804081333-c8f06018bfc8
-	k8s.io/apimachinery v0.0.0-20220804081135-41606c6745e1
-	k8s.io/client-go v0.0.0-20220804081630-55b6f70f8313
-	k8s.io/code-generator v0.0.0-20220804080942-fa4467dc8ef8
-	k8s.io/klog/v2 v2.70.1
+	k8s.io/api v0.27.5
+	k8s.io/apimachinery v0.27.5
+	k8s.io/client-go v0.27.5
+	k8s.io/code-generator v0.27.5
+	k8s.io/klog/v2 v2.90.1
 )
 
 require (
-	github.com/PuerkitoBio/purell v1.1.1 // indirect
-	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/emicklei/go-restful/v3 v3.8.0 // indirect
+	github.com/emicklei/go-restful/v3 v3.9.0 // indirect
 	github.com/evanphx/json-patch v4.12.0+incompatible // indirect
 	github.com/go-logr/logr v1.2.3 // indirect
-	github.com/go-openapi/jsonpointer v0.19.5 // indirect
-	github.com/go-openapi/jsonreference v0.19.5 // indirect
-	github.com/go-openapi/swag v0.19.14 // indirect
+	github.com/go-openapi/jsonpointer v0.19.6 // indirect
+	github.com/go-openapi/jsonreference v0.20.1 // indirect
+	github.com/go-openapi/swag v0.22.3 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/gnostic v0.5.7-v3refs // indirect
-	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
 	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/google/uuid v1.3.0 // indirect
 	github.com/imdario/mergo v0.3.6 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/mailru/easyjson v0.7.6 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
-	golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
-	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
-	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
-	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
-	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/mod v0.9.0 // indirect
+	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/oauth2 v0.0.0-20220223155221-ee480838109b // indirect
+	golang.org/x/sys v0.6.0 // indirect
+	golang.org/x/term v0.6.0 // indirect
+	golang.org/x/text v0.8.0 // indirect
 	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
-	golang.org/x/tools v0.1.12 // indirect
+	golang.org/x/tools v0.7.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/protobuf v1.28.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/gengo v0.0.0-20211129171323-c02415ce4185 // indirect
-	k8s.io/kube-openapi v0.0.0-20220803162953-67bda5d908f1 // indirect
-	k8s.io/utils v0.0.0-20220728103510-ee6ede2d64ed // indirect
-	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
+	k8s.io/gengo v0.0.0-20220902162205-c0856e24416d // indirect
+	k8s.io/kube-openapi v0.0.0-20230501164219-8b0f38b5fd1f // indirect
+	k8s.io/utils v0.0.0-20230209194617-a36077c30491 // indirect
+	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
-	sigs.k8s.io/yaml v1.2.0 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
 )
 
 replace (
-	k8s.io/api => k8s.io/api v0.0.0-20220804081333-c8f06018bfc8
-	k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20220804081135-41606c6745e1
-	k8s.io/client-go => k8s.io/client-go v0.0.0-20220804081630-55b6f70f8313
-	k8s.io/code-generator => k8s.io/code-generator v0.0.0-20220804080942-fa4467dc8ef8
+	k8s.io/api => k8s.io/api v0.27.5
+	k8s.io/apimachinery => k8s.io/apimachinery v0.27.5
+	k8s.io/client-go => k8s.io/client-go v0.27.5
+	k8s.io/code-generator => k8s.io/code-generator v0.27.5
 )

go.sum

@@ -33,10 +33,6 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
-github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
-github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 h1:d+Bc7a5rLufV/sSk/8dngufqelfh6jnri85riMAaF/M=
-github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
@@ -48,8 +44,8 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
-github.com/emicklei/go-restful/v3 v3.8.0 h1:eCZ8ulSerjdAiaNpF7GxXIE7ZCMo1moN1qX+S609eVw=
-github.com/emicklei/go-restful/v3 v3.8.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
+github.com/emicklei/go-restful/v3 v3.9.0 h1:XwGDlfxEnQZzuopoqxwSEllNcCOM9DhhFyhFIIGKwxE=
+github.com/emicklei/go-restful/v3 v3.9.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
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@@ -59,19 +55,17 @@ github.com/evanphx/json-patch v4.12.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQL
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@@ -101,8 +95,9 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
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@@ -115,8 +110,8 @@ github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -129,8 +124,10 @@ github.com/google/pprof v0.0.0-20200212024743-f11f1df84d12/go.mod h1:ZgVRPoUq/hf
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@@ -148,14 +145,14 @@ github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI
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@@ -163,26 +160,28 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
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@@ -227,8 +226,8 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
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@@ -241,7 +240,6 @@ golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR
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-golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -257,15 +255,16 @@ golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81R
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
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-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
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 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
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 golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
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 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -301,17 +300,21 @@ golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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@@ -360,12 +363,11 @@ golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
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@@ -445,13 +447,13 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
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 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
-google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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@@ -470,30 +472,30 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
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 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
-sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 h1:iXTIw73aPyC+oRdyqqvVJuloN1p0AC/kzH07hu3NE+k=
-sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
+sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
+sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
 sigs.k8s.io/structured-merge-diff/v4 v4.2.3 h1:PRbqxJClWWYMNV1dhaG4NsibJbArud9kFxnAMREiWFE=
 sigs.k8s.io/structured-merge-diff/v4 v4.2.3/go.mod h1:qjx8mGObPmV2aSZepjQjbmb2ihdVs8cGKBraizNC69E=
-sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
+sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo=
+sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8=

hack/update-codegen.sh

@@ -25,8 +25,9 @@ CODEGEN_PKG=${CODEGEN_PKG:-$(cd "${SCRIPT_ROOT}"; ls -d -1 ./vendor/k8s.io/code-
 # --output-base    because this script should also be able to run inside the vendor dir of
 #                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
 #                  instead of the $GOPATH directly. For normal projects this can be dropped.
-bash "${CODEGEN_PKG}"/generate-groups.sh "deepcopy,client,informer,lister" \
-  k8s.io/sample-controller/pkg/generated k8s.io/sample-controller/pkg/apis \
+"${CODEGEN_PKG}/generate-groups.sh" "deepcopy,client,informer,lister" \
+  k8s.io/sample-controller/pkg/generated \
+  k8s.io/sample-controller/pkg/apis \
   samplecontroller:v1alpha1 \
   --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
   --go-header-file "${SCRIPT_ROOT}"/hack/boilerplate.go.txt

hack/verify-codegen.sh

@@ -18,14 +18,12 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
-
+SCRIPT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
 DIFFROOT="${SCRIPT_ROOT}/pkg"
-TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/pkg"
-_tmp="${SCRIPT_ROOT}/_tmp"
+TMP_DIFFROOT="$(mktemp -d -t "$(basename "$0").XXXXXX")/pkg"
 
 cleanup() {
-  rm -rf "${_tmp}"
+  rm -rf "${TMP_DIFFROOT}"
 }
 trap "cleanup" EXIT SIGINT
 
@@ -38,9 +36,7 @@ cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"
 echo "diffing ${DIFFROOT} against freshly generated codegen"
 ret=0
 diff -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
-cp -a "${TMP_DIFFROOT}"/* "${DIFFROOT}"
-if [[ $ret -eq 0 ]]
-then
+if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"

main.go

@@ -24,12 +24,12 @@ import (
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/klog/v2"
+	"k8s.io/sample-controller/pkg/signals"
 	// Uncomment the following line to load the gcp plugin (only required to authenticate against GKE clusters).
 	// _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
 
 	clientset "k8s.io/sample-controller/pkg/generated/clientset/versioned"
 	informers "k8s.io/sample-controller/pkg/generated/informers/externalversions"
-	"k8s.io/sample-controller/pkg/signals"
 )
 
 var (
@@ -41,38 +41,43 @@ func main() {
 	klog.InitFlags(nil)
 	flag.Parse()
 
-	// set up signals so we handle the first shutdown signal gracefully
-	stopCh := signals.SetupSignalHandler()
+	// set up signals so we handle the shutdown signal gracefully
+	ctx := signals.SetupSignalHandler()
+	logger := klog.FromContext(ctx)
 
 	cfg, err := clientcmd.BuildConfigFromFlags(masterURL, kubeconfig)
 	if err != nil {
-		klog.Fatalf("Error building kubeconfig: %s", err.Error())
+		logger.Error(err, "Error building kubeconfig")
+		klog.FlushAndExit(klog.ExitFlushTimeout, 1)
 	}
 
 	kubeClient, err := kubernetes.NewForConfig(cfg)
 	if err != nil {
-		klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
+		logger.Error(err, "Error building kubernetes clientset")
+		klog.FlushAndExit(klog.ExitFlushTimeout, 1)
 	}
 
 	exampleClient, err := clientset.NewForConfig(cfg)
 	if err != nil {
-		klog.Fatalf("Error building example clientset: %s", err.Error())
+		logger.Error(err, "Error building kubernetes clientset")
+		klog.FlushAndExit(klog.ExitFlushTimeout, 1)
 	}
 
 	kubeInformerFactory := kubeinformers.NewSharedInformerFactory(kubeClient, time.Second*30)
 	exampleInformerFactory := informers.NewSharedInformerFactory(exampleClient, time.Second*30)
 
-	controller := NewController(kubeClient, exampleClient,
+	controller := NewController(ctx, kubeClient, exampleClient,
 		kubeInformerFactory.Apps().V1().Deployments(),
 		exampleInformerFactory.Samplecontroller().V1alpha1().Foos())
 
-	// notice that there is no need to run Start methods in a separate goroutine. (i.e. go kubeInformerFactory.Start(stopCh)
+	// notice that there is no need to run Start methods in a separate goroutine. (i.e. go kubeInformerFactory.Start(ctx.done())
 	// Start method is non-blocking and runs all registered informers in a dedicated goroutine.
-	kubeInformerFactory.Start(stopCh)
-	exampleInformerFactory.Start(stopCh)
+	kubeInformerFactory.Start(ctx.Done())
+	exampleInformerFactory.Start(ctx.Done())
 
-	if err = controller.Run(2, stopCh); err != nil {
-		klog.Fatalf("Error running controller: %s", err.Error())
+	if err = controller.Run(ctx, 2); err != nil {
+		logger.Error(err, "Error running controller")
+		klog.FlushAndExit(klog.ExitFlushTimeout, 1)
 	}
 }
 

pkg/generated/clientset/versioned/clientset.go

@@ -33,8 +33,7 @@ type Interface interface {
 	SamplecontrollerV1alpha1() samplecontrollerv1alpha1.SamplecontrollerV1alpha1Interface
 }
 
-// Clientset contains the clients for groups. Each group has exactly one
-// version included in a Clientset.
+// Clientset contains the clients for groups.
 type Clientset struct {
 	*discovery.DiscoveryClient
 	samplecontrollerV1alpha1 *samplecontrollerv1alpha1.SamplecontrollerV1alpha1Client

pkg/generated/clientset/versioned/doc.go

@@ -1,20 +0,0 @@
-/*
-Copyright 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.
-*/
-
-// Code generated by client-gen. DO NOT EDIT.
-
-// This package has the automatically generated clientset.
-package versioned

pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/fake/fake_foo.go

@@ -23,7 +23,6 @@ import (
 
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	labels "k8s.io/apimachinery/pkg/labels"
-	schema "k8s.io/apimachinery/pkg/runtime/schema"
 	types "k8s.io/apimachinery/pkg/types"
 	watch "k8s.io/apimachinery/pkg/watch"
 	testing "k8s.io/client-go/testing"
@@ -36,9 +35,9 @@ type FakeFoos struct {
 	ns   string
 }
 
-var foosResource = schema.GroupVersionResource{Group: "samplecontroller.k8s.io", Version: "v1alpha1", Resource: "foos"}
+var foosResource = v1alpha1.SchemeGroupVersion.WithResource("foos")
 
-var foosKind = schema.GroupVersionKind{Group: "samplecontroller.k8s.io", Version: "v1alpha1", Kind: "Foo"}
+var foosKind = v1alpha1.SchemeGroupVersion.WithKind("Foo")
 
 // Get takes name of the foo, and returns the corresponding foo object, and an error if there is any.
 func (c *FakeFoos) Get(ctx context.Context, name string, options v1.GetOptions) (result *v1alpha1.Foo, err error) {

pkg/generated/informers/externalversions/factory.go

@@ -47,6 +47,11 @@ type sharedInformerFactory struct {
 	// startedInformers is used for tracking which informers have been started.
 	// This allows Start() to be called multiple times safely.
 	startedInformers map[reflect.Type]bool
+	// wg tracks how many goroutines were started.
+	wg sync.WaitGroup
+	// shuttingDown is true when Shutdown has been called. It may still be running
+	// because it needs to wait for goroutines.
+	shuttingDown bool
 }
 
 // WithCustomResyncConfig sets a custom resync period for the specified informer types.
@@ -107,20 +112,39 @@ func NewSharedInformerFactoryWithOptions(client versioned.Interface, defaultResy
 	return factory
 }
 
-// Start initializes all requested informers.
 func (f *sharedInformerFactory) Start(stopCh <-chan struct{}) {
 	f.lock.Lock()
 	defer f.lock.Unlock()
 
+	if f.shuttingDown {
+		return
+	}
+
 	for informerType, informer := range f.informers {
 		if !f.startedInformers[informerType] {
-			go informer.Run(stopCh)
+			f.wg.Add(1)
+			// We need a new variable in each loop iteration,
+			// otherwise the goroutine would use the loop variable
+			// and that keeps changing.
+			informer := informer
+			go func() {
+				defer f.wg.Done()
+				informer.Run(stopCh)
+			}()
 			f.startedInformers[informerType] = true
 		}
 	}
 }
 
-// WaitForCacheSync waits for all started informers' cache were synced.
+func (f *sharedInformerFactory) Shutdown() {
+	f.lock.Lock()
+	f.shuttingDown = true
+	f.lock.Unlock()
+
+	// Will return immediately if there is nothing to wait for.
+	f.wg.Wait()
+}
+
 func (f *sharedInformerFactory) WaitForCacheSync(stopCh <-chan struct{}) map[reflect.Type]bool {
 	informers := func() map[reflect.Type]cache.SharedIndexInformer {
 		f.lock.Lock()
@@ -167,11 +191,58 @@ func (f *sharedInformerFactory) InformerFor(obj runtime.Object, newFunc internal
 
 // SharedInformerFactory provides shared informers for resources in all known
 // API group versions.
+//
+// It is typically used like this:
+//
+//	ctx, cancel := context.Background()
+//	defer cancel()
+//	factory := NewSharedInformerFactory(client, resyncPeriod)
+//	defer factory.WaitForStop()    // Returns immediately if nothing was started.
+//	genericInformer := factory.ForResource(resource)
+//	typedInformer := factory.SomeAPIGroup().V1().SomeType()
+//	factory.Start(ctx.Done())          // Start processing these informers.
+//	synced := factory.WaitForCacheSync(ctx.Done())
+//	for v, ok := range synced {
+//	    if !ok {
+//	        fmt.Fprintf(os.Stderr, "caches failed to sync: %v", v)
+//	        return
+//	    }
+//	}
+//
+//	// Creating informers can also be created after Start, but then
+//	// Start must be called again:
+//	anotherGenericInformer := factory.ForResource(resource)
+//	factory.Start(ctx.Done())
 type SharedInformerFactory interface {
 	internalinterfaces.SharedInformerFactory
-	ForResource(resource schema.GroupVersionResource) (GenericInformer, error)
+
+	// Start initializes all requested informers. They are handled in goroutines
+	// which run until the stop channel gets closed.
+	Start(stopCh <-chan struct{})
+
+	// Shutdown marks a factory as shutting down. At that point no new
+	// informers can be started anymore and Start will return without
+	// doing anything.
+	//
+	// In addition, Shutdown blocks until all goroutines have terminated. For that
+	// to happen, the close channel(s) that they were started with must be closed,
+	// either before Shutdown gets called or while it is waiting.
+	//
+	// Shutdown may be called multiple times, even concurrently. All such calls will
+	// block until all goroutines have terminated.
+	Shutdown()
+
+	// WaitForCacheSync blocks until all started informers' caches were synced
+	// or the stop channel gets closed.
 	WaitForCacheSync(stopCh <-chan struct{}) map[reflect.Type]bool
 
+	// ForResource gives generic access to a shared informer of the matching type.
+	ForResource(resource schema.GroupVersionResource) (GenericInformer, error)
+
+	// InternalInformerFor returns the SharedIndexInformer for obj using an internal
+	// client.
+	InformerFor(obj runtime.Object, newFunc internalinterfaces.NewInformerFunc) cache.SharedIndexInformer
+
 	Samplecontroller() samplecontroller.Interface
 }
 

pkg/signals/signal.go

@@ -17,6 +17,7 @@ limitations under the License.
 package signals
 
 import (
+	"context"
 	"os"
 	"os/signal"
 )
@@ -26,18 +27,18 @@ var onlyOneSignalHandler = make(chan struct{})
 // SetupSignalHandler registered for SIGTERM and SIGINT. A stop channel is returned
 // which is closed on one of these signals. If a second signal is caught, the program
 // is terminated with exit code 1.
-func SetupSignalHandler() (stopCh <-chan struct{}) {
+func SetupSignalHandler() context.Context {
 	close(onlyOneSignalHandler) // panics when called twice
 
-	stop := make(chan struct{})
 	c := make(chan os.Signal, 2)
+	ctx, cancel := context.WithCancel(context.Background())
 	signal.Notify(c, shutdownSignals...)
 	go func() {
 		<-c
-		close(stop)
+		cancel()
 		<-c
 		os.Exit(1) // second signal. Exit directly.
 	}()
 
-	return stop
+	return ctx
 }