bug(tiller): correct release statuses on rollback

Correcting similar issue as the one with UpdateRelease
(#1137) for RollbackRelase

cmd/tiller/release_server.go

@@ -407,18 +407,18 @@ func (s *releaseServer) RollbackRelease(c ctx.Context, req *services.RollbackRel
 		return nil, err
 	}
 
-	rel, err := s.performRollback(currentRelease, targetRelease, req)
+	res, err := s.performRollback(currentRelease, targetRelease, req)
 	if err != nil {
-		return nil, err
+		return res, err
 	}
 
 	if !req.DryRun {
 		if err := s.env.Releases.Create(targetRelease); err != nil {
-			return nil, err
+			return res, err
 		}
 	}
 
-	return rel, nil
+	return res, nil
 }
 
 func (s *releaseServer) performRollback(currentRelease, targetRelease *release.Release, req *services.RollbackReleaseRequest) (*services.RollbackReleaseResponse, error) {
@@ -437,7 +437,12 @@ func (s *releaseServer) performRollback(currentRelease, targetRelease *release.R
 	}
 
 	if err := s.performKubeUpdate(currentRelease, targetRelease); err != nil {
-		return nil, err
+		log.Printf("warning: Release Rollback %q failed: %s", targetRelease.Name, err)
+		currentRelease.Info.Status.Code = release.Status_SUPERSEDED
+		targetRelease.Info.Status.Code = release.Status_FAILED
+		s.recordRelease(currentRelease, true)
+		s.recordRelease(targetRelease, false)
+		return res, err
 	}
 
 	// post-rollback hooks
@@ -448,9 +453,7 @@ func (s *releaseServer) performRollback(currentRelease, targetRelease *release.R
 	}
 
 	currentRelease.Info.Status.Code = release.Status_SUPERSEDED
-	if err := s.env.Releases.Update(currentRelease); err != nil {
-		return nil, fmt.Errorf("Update of %s failed: %s", currentRelease.Name, err)
-	}
+	s.recordRelease(currentRelease, true)
 
 	targetRelease.Info.Status.Code = release.Status_DEPLOYED
 

cmd/tiller/release_server_test.go

@@ -623,6 +623,39 @@ func TestUpdateReleaseFailure(t *testing.T) {
 	}
 }
 
+func TestRollbackReleaseFailure(t *testing.T) {
+	c := helm.NewContext()
+	rs := rsFixture()
+	rel := releaseStub()
+	rs.env.Releases.Create(rel)
+	upgradedRel := upgradeReleaseVersion(rel)
+	rs.env.Releases.Update(rel)
+	rs.env.Releases.Create(upgradedRel)
+
+	req := &services.RollbackReleaseRequest{
+		Name:         rel.Name,
+		DisableHooks: true,
+	}
+
+	rs.env.KubeClient = newUpdateFailingKubeClient()
+	res, err := rs.RollbackRelease(c, req)
+	if err == nil {
+		t.Error("Expected failed rollback")
+	}
+
+	if targetStatus := res.Release.Info.Status.Code; targetStatus != release.Status_FAILED {
+		t.Errorf("Expected FAILED release. Got %v", targetStatus)
+	}
+
+	oldRelease, err := rs.env.Releases.Get(rel.Name, rel.Version)
+	if err != nil {
+		t.Errorf("Expected to be able to get previous release")
+	}
+	if oldStatus := oldRelease.Info.Status.Code; oldStatus != release.Status_SUPERSEDED {
+		t.Errorf("Expected SUPERSEDED status on previous Release version. Got %v", oldStatus)
+	}
+}
+
 func TestUpdateReleaseNoHooks(t *testing.T) {
 	c := helm.NewContext()
 	rs := rsFixture()