Federated deployment controller - part 1

federation/pkg/federation-controller/deployment/deploymentcontroller_test.go

@@ -0,0 +1,168 @@
+/*
+Copyright 2016 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 deployment
+
+import (
+	"flag"
+	"fmt"
+	"testing"
+	"time"
+
+	fedv1 "k8s.io/kubernetes/federation/apis/federation/v1beta1"
+	fake_fedclientset "k8s.io/kubernetes/federation/client/clientset_generated/federation_release_1_5/fake"
+	. "k8s.io/kubernetes/federation/pkg/federation-controller/util/test"
+	"k8s.io/kubernetes/pkg/api/meta"
+	apiv1 "k8s.io/kubernetes/pkg/api/v1"
+	extensionsv1 "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
+	kubeclientset "k8s.io/kubernetes/pkg/client/clientset_generated/release_1_5"
+	fake_kubeclientset "k8s.io/kubernetes/pkg/client/clientset_generated/release_1_5/fake"
+	"k8s.io/kubernetes/pkg/runtime"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestParseFederationDeploymentPreference(t *testing.T) {
+	successPrefs := []string{
+		`{"rebalance": true,
+		  "clusters": {
+		    "k8s-1": {"minReplicas": 10, "maxReplicas": 20, "weight": 2},
+		    "*": {"weight": 1}
+		}}`,
+	}
+	failedPrefes := []string{
+		`{`, // bad json
+	}
+
+	rs := newDeploymentWithReplicas("d-1", 100)
+	accessor, _ := meta.Accessor(rs)
+	anno := accessor.GetAnnotations()
+	if anno == nil {
+		anno = make(map[string]string)
+		accessor.SetAnnotations(anno)
+	}
+	for _, prefString := range successPrefs {
+		anno[FedDeploymentPreferencesAnnotation] = prefString
+		pref, err := parseFederationDeploymentPreference(rs)
+		assert.NotNil(t, pref)
+		assert.Nil(t, err)
+	}
+	for _, prefString := range failedPrefes {
+		anno[FedDeploymentPreferencesAnnotation] = prefString
+		pref, err := parseFederationDeploymentPreference(rs)
+		assert.Nil(t, pref)
+		assert.NotNil(t, err)
+	}
+}
+
+func TestDeploymentController(t *testing.T) {
+	flag.Set("logtostderr", "true")
+	flag.Set("v", "5")
+	flag.Parse()
+
+	deploymentReviewDelay = 500 * time.Millisecond
+	clusterAvailableDelay = 100 * time.Millisecond
+	clusterUnavailableDelay = 100 * time.Millisecond
+	allDeploymentReviewDelay = 500 * time.Millisecond
+
+	cluster1 := NewCluster("cluster1", apiv1.ConditionTrue)
+	cluster2 := NewCluster("cluster2", apiv1.ConditionTrue)
+
+	fakeClient := &fake_fedclientset.Clientset{}
+	RegisterFakeList("clusters", &fakeClient.Fake, &fedv1.ClusterList{Items: []fedv1.Cluster{*cluster1}})
+	deploymentsWatch := RegisterFakeWatch("deployments", &fakeClient.Fake)
+	clusterWatch := RegisterFakeWatch("clusters", &fakeClient.Fake)
+
+	cluster1Client := &fake_kubeclientset.Clientset{}
+	cluster1Watch := RegisterFakeWatch("deployments", &cluster1Client.Fake)
+	_ = RegisterFakeWatch("pods", &cluster1Client.Fake)
+	RegisterFakeList("deployments", &cluster1Client.Fake, &extensionsv1.DeploymentList{Items: []extensionsv1.Deployment{}})
+	cluster1CreateChan := RegisterFakeCopyOnCreate("deployments", &cluster1Client.Fake, cluster1Watch)
+	cluster1UpdateChan := RegisterFakeCopyOnUpdate("deployments", &cluster1Client.Fake, cluster1Watch)
+
+	cluster2Client := &fake_kubeclientset.Clientset{}
+	cluster2Watch := RegisterFakeWatch("deployments", &cluster2Client.Fake)
+	_ = RegisterFakeWatch("pods", &cluster2Client.Fake)
+	RegisterFakeList("deployments", &cluster2Client.Fake, &extensionsv1.DeploymentList{Items: []extensionsv1.Deployment{}})
+	cluster2CreateChan := RegisterFakeCopyOnCreate("deployments", &cluster2Client.Fake, cluster2Watch)
+
+	deploymentController := NewDeploymentController(fakeClient)
+	clientFactory := func(cluster *fedv1.Cluster) (kubeclientset.Interface, error) {
+		switch cluster.Name {
+		case cluster1.Name:
+			return cluster1Client, nil
+		case cluster2.Name:
+			return cluster2Client, nil
+		default:
+			return nil, fmt.Errorf("Unknown cluster")
+		}
+	}
+	ToFederatedInformerForTestOnly(deploymentController.fedDeploymentInformer).SetClientFactory(clientFactory)
+	ToFederatedInformerForTestOnly(deploymentController.fedPodInformer).SetClientFactory(clientFactory)
+
+	stop := make(chan struct{})
+	go deploymentController.Run(5, stop)
+
+	// Create deployment. Expect to see it in cluster1.
+	dep1 := newDeploymentWithReplicas("depA", 6)
+	deploymentsWatch.Add(dep1)
+	createdDep1 := GetDeploymentFromChan(cluster1CreateChan)
+	assert.NotNil(t, createdDep1)
+	assert.Equal(t, dep1.Namespace, createdDep1.Namespace)
+	assert.Equal(t, dep1.Name, createdDep1.Name)
+	assert.Equal(t, dep1.Spec.Replicas, createdDep1.Spec.Replicas)
+
+	// Increase replica count. Expect to see the update in cluster1.
+	newRep := int32(8)
+	dep1.Spec.Replicas = &newRep
+	deploymentsWatch.Modify(dep1)
+	updatedDep1 := GetDeploymentFromChan(cluster1UpdateChan)
+	assert.NotNil(t, updatedDep1)
+	assert.Equal(t, dep1.Namespace, updatedDep1.Namespace)
+	assert.Equal(t, dep1.Name, updatedDep1.Name)
+	assert.Equal(t, dep1.Spec.Replicas, updatedDep1.Spec.Replicas)
+
+	// Add new cluster. Although rebalance = false, no pods have been created yet so it should
+	// rebalance anyway.
+	clusterWatch.Add(cluster2)
+	updatedDep1 = GetDeploymentFromChan(cluster1UpdateChan)
+	createdDep2 := GetDeploymentFromChan(cluster2CreateChan)
+	assert.NotNil(t, updatedDep1)
+	assert.NotNil(t, createdDep2)
+
+	assert.Equal(t, dep1.Namespace, createdDep2.Namespace)
+	assert.Equal(t, dep1.Name, createdDep2.Name)
+	assert.Equal(t, *dep1.Spec.Replicas/2, *createdDep2.Spec.Replicas)
+	assert.Equal(t, *dep1.Spec.Replicas/2, *updatedDep1.Spec.Replicas)
+}
+
+func GetDeploymentFromChan(c chan runtime.Object) *extensionsv1.Deployment {
+	secret := GetObjectFromChan(c).(*extensionsv1.Deployment)
+	return secret
+}
+
+func newDeploymentWithReplicas(name string, replicas int32) *extensionsv1.Deployment {
+	return &extensionsv1.Deployment{
+		ObjectMeta: apiv1.ObjectMeta{
+			Name:      name,
+			Namespace: apiv1.NamespaceDefault,
+			SelfLink:  "/api/v1/namespaces/default/deployments/name",
+		},
+		Spec: extensionsv1.DeploymentSpec{
+			Replicas: &replicas,
+		},
+	}
+}