Add sample-controller as a sample

samples/controller/main.go

@@ -0,0 +1,77 @@
+/*
+Copyright 2017 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 main
+
+import (
+	"flag"
+	"time"
+
+	"github.com/golang/glog"
+	kubeinformers "k8s.io/client-go/informers"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
+	// 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 "github.com/kubernetes-sigs/kubebuilder/samples/controller/pkg/client/clientset/versioned"
+	informers "github.com/kubernetes-sigs/kubebuilder/samples/controller/pkg/client/informers/externalversions"
+	"github.com/kubernetes-sigs/kubebuilder/samples/controller/pkg/signals"
+)
+
+var (
+	masterURL  string
+	kubeconfig string
+)
+
+func main() {
+	flag.Parse()
+
+	// set up signals so we handle the first shutdown signal gracefully
+	stopCh := signals.SetupSignalHandler()
+
+	cfg, err := clientcmd.BuildConfigFromFlags(masterURL, kubeconfig)
+	if err != nil {
+		glog.Fatalf("Error building kubeconfig: %s", err.Error())
+	}
+
+	kubeClient, err := kubernetes.NewForConfig(cfg)
+	if err != nil {
+		glog.Fatalf("Error building kubernetes clientset: %s", err.Error())
+	}
+
+	exampleClient, err := clientset.NewForConfig(cfg)
+	if err != nil {
+		glog.Fatalf("Error building example clientset: %s", err.Error())
+	}
+
+	kubeInformerFactory := kubeinformers.NewSharedInformerFactory(kubeClient, time.Second*30)
+	exampleInformerFactory := informers.NewSharedInformerFactory(exampleClient, time.Second*30)
+
+	controller := NewController(kubeClient, exampleClient, kubeInformerFactory, exampleInformerFactory)
+
+	go kubeInformerFactory.Start(stopCh)
+	go exampleInformerFactory.Start(stopCh)
+
+	if err = controller.Run(2, stopCh); err != nil {
+		glog.Fatalf("Error running controller: %s", err.Error())
+	}
+}
+
+func init() {
+	flag.StringVar(&kubeconfig, "kubeconfig", "", "Path to a kubeconfig. Only required if out-of-cluster.")
+	flag.StringVar(&masterURL, "master", "", "The address of the Kubernetes API server. Overrides any value in kubeconfig. Only required if out-of-cluster.")
+}

samples/controller/pkg/apis/samplecontroller/register.go

@@ -0,0 +1,21 @@
+/*
+Copyright 2017 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 samplecontroller
+
+const (
+	GroupName = "samplecontroller.k8s.io"
+)

samples/controller/pkg/apis/samplecontroller/v1alpha1/doc.go

@@ -0,0 +1,21 @@
+/*
+Copyright 2017 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.
+*/
+
+// +k8s:deepcopy-gen=package
+
+// Package v1alpha1 is the v1alpha1 version of the API.
+// +groupName=samplecontroller.k8s.io
+package v1alpha1

samples/controller/pkg/apis/samplecontroller/v1alpha1/register.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2017 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 v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+
+	samplecontroller "github.com/kubernetes-sigs/kubebuilder/samples/controller/pkg/apis/samplecontroller"
+)
+
+// SchemeGroupVersion is group version used to register these objects
+var SchemeGroupVersion = schema.GroupVersion{Group: samplecontroller.GroupName, Version: "v1alpha1"}
+
+// Kind takes an unqualified kind and returns back a Group qualified GroupKind
+func Kind(kind string) schema.GroupKind {
+	return SchemeGroupVersion.WithKind(kind).GroupKind()
+}
+
+// Resource takes an unqualified resource and returns a Group qualified GroupResource
+func Resource(resource string) schema.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
+
+var (
+	SchemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
+	AddToScheme   = SchemeBuilder.AddToScheme
+)
+
+// Adds the list of known types to Scheme.
+func addKnownTypes(scheme *runtime.Scheme) error {
+	scheme.AddKnownTypes(SchemeGroupVersion,
+		&Foo{},
+		&FooList{},
+	)
+	metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
+	return nil
+}

samples/controller/pkg/apis/samplecontroller/v1alpha1/types.go

@@ -0,0 +1,55 @@
+/*
+Copyright 2017 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 v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// +genclient
+// +genclient:noStatus
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// Foo is a specification for a Foo resource
+type Foo struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   FooSpec   `json:"spec"`
+	Status FooStatus `json:"status"`
+}
+
+// FooSpec is the spec for a Foo resource
+type FooSpec struct {
+	DeploymentName string `json:"deploymentName"`
+	Replicas       *int32 `json:"replicas"`
+}
+
+// FooStatus is the status for a Foo resource
+type FooStatus struct {
+	AvailableReplicas int32 `json:"availableReplicas"`
+}
+
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// FooList is a list of Foo resources
+type FooList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata"`
+
+	Items []Foo `json:"items"`
+}