Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/pkg/kubectl/rollback.go

@@ -0,0 +1,192 @@
+/*
+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 kubectl
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/v1"
+	"k8s.io/kubernetes/pkg/apis/extensions"
+	externalextensions "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
+	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
+	deploymentutil "k8s.io/kubernetes/pkg/controller/deployment/util"
+	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/runtime/schema"
+	sliceutil "k8s.io/kubernetes/pkg/util/slice"
+	"k8s.io/kubernetes/pkg/watch"
+)
+
+// Rollbacker provides an interface for resources that can be rolled back.
+type Rollbacker interface {
+	Rollback(obj runtime.Object, updatedAnnotations map[string]string, toRevision int64, dryRun bool) (string, error)
+}
+
+func RollbackerFor(kind schema.GroupKind, c clientset.Interface) (Rollbacker, error) {
+	switch kind {
+	case extensions.Kind("Deployment"):
+		return &DeploymentRollbacker{c}, nil
+	}
+	return nil, fmt.Errorf("no rollbacker has been implemented for %q", kind)
+}
+
+type DeploymentRollbacker struct {
+	c clientset.Interface
+}
+
+func (r *DeploymentRollbacker) Rollback(obj runtime.Object, updatedAnnotations map[string]string, toRevision int64, dryRun bool) (string, error) {
+	d, ok := obj.(*extensions.Deployment)
+	if !ok {
+		return "", fmt.Errorf("passed object is not a Deployment: %#v", obj)
+	}
+	if dryRun {
+		return simpleDryRun(d, r.c, toRevision)
+	}
+	if d.Spec.Paused {
+		return "", fmt.Errorf("you cannot rollback a paused deployment; resume it first with 'kubectl rollout resume deployment/%s' and try again", d.Name)
+	}
+	deploymentRollback := &extensions.DeploymentRollback{
+		Name:               d.Name,
+		UpdatedAnnotations: updatedAnnotations,
+		RollbackTo: extensions.RollbackConfig{
+			Revision: toRevision,
+		},
+	}
+	result := ""
+
+	// Get current events
+	events, err := r.c.Core().Events(d.Namespace).List(api.ListOptions{})
+	if err != nil {
+		return result, err
+	}
+	// Do the rollback
+	if err := r.c.Extensions().Deployments(d.Namespace).Rollback(deploymentRollback); err != nil {
+		return result, err
+	}
+	// Watch for the changes of events
+	watch, err := r.c.Core().Events(d.Namespace).Watch(api.ListOptions{Watch: true, ResourceVersion: events.ResourceVersion})
+	if err != nil {
+		return result, err
+	}
+	result = watchRollbackEvent(watch)
+	return result, err
+}
+
+// watchRollbackEvent watches for rollback events and returns rollback result
+func watchRollbackEvent(w watch.Interface) string {
+	signals := make(chan os.Signal, 1)
+	signal.Notify(signals, os.Interrupt, os.Kill, syscall.SIGTERM)
+	for {
+		select {
+		case event, ok := <-w.ResultChan():
+			if !ok {
+				return ""
+			}
+			obj, ok := event.Object.(*api.Event)
+			if !ok {
+				w.Stop()
+				return ""
+			}
+			isRollback, result := isRollbackEvent(obj)
+			if isRollback {
+				w.Stop()
+				return result
+			}
+		case <-signals:
+			w.Stop()
+		}
+	}
+}
+
+// isRollbackEvent checks if the input event is about rollback, and returns true and
+// related result string back if it is.
+func isRollbackEvent(e *api.Event) (bool, string) {
+	rollbackEventReasons := []string{deploymentutil.RollbackRevisionNotFound, deploymentutil.RollbackTemplateUnchanged, deploymentutil.RollbackDone}
+	for _, reason := range rollbackEventReasons {
+		if e.Reason == reason {
+			if reason == deploymentutil.RollbackDone {
+				return true, "rolled back"
+			}
+			return true, fmt.Sprintf("skipped rollback (%s: %s)", e.Reason, e.Message)
+		}
+	}
+	return false, ""
+}
+
+func simpleDryRun(deployment *extensions.Deployment, c clientset.Interface, toRevision int64) (string, error) {
+	externalDeployment := &externalextensions.Deployment{}
+	if err := api.Scheme.Convert(deployment, externalDeployment, nil); err != nil {
+		return "", fmt.Errorf("failed to convert deployment, %v", err)
+	}
+	versionedClient := versionedClientsetForDeployment(c)
+	_, allOldRSs, newRS, err := deploymentutil.GetAllReplicaSets(externalDeployment, versionedClient)
+	if err != nil {
+		return "", fmt.Errorf("failed to retrieve replica sets from deployment %s: %v", deployment.Name, err)
+	}
+	allRSs := allOldRSs
+	if newRS != nil {
+		allRSs = append(allRSs, newRS)
+	}
+
+	revisionToSpec := make(map[int64]*v1.PodTemplateSpec)
+	for _, rs := range allRSs {
+		v, err := deploymentutil.Revision(rs)
+		if err != nil {
+			continue
+		}
+		revisionToSpec[v] = &rs.Spec.Template
+	}
+
+	if len(revisionToSpec) == 0 {
+		return "No rollout history found.", nil
+	}
+
+	if toRevision > 0 {
+		template, ok := revisionToSpec[toRevision]
+		if !ok {
+			return "", fmt.Errorf("unable to find specified revision")
+		}
+		buf := bytes.NewBuffer([]byte{})
+		internalTemplate := &api.PodTemplateSpec{}
+		if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(template, internalTemplate, nil); err != nil {
+			return "", fmt.Errorf("failed to convert podtemplate, %v", err)
+		}
+		DescribePodTemplate(internalTemplate, buf)
+		return buf.String(), nil
+	}
+
+	// Sort the revisionToSpec map by revision
+	revisions := make([]int64, 0, len(revisionToSpec))
+	for r := range revisionToSpec {
+		revisions = append(revisions, r)
+	}
+	sliceutil.SortInts64(revisions)
+
+	template, _ := revisionToSpec[revisions[len(revisions)-1]]
+	buf := bytes.NewBuffer([]byte{})
+	buf.WriteString("\n")
+	internalTemplate := &api.PodTemplateSpec{}
+	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(template, internalTemplate, nil); err != nil {
+		return "", fmt.Errorf("failed to convert podtemplate, %v", err)
+	}
+	DescribePodTemplate(internalTemplate, buf)
+	return buf.String(), nil
+}