tiller: store annotations during release install/upgrade

Upgrade logic is simple:
- if no annotations are provided, then use the old annotations in the new
  release version;
- if annotations are provided, then replace the old annotations with them.

pkg/helm/option.go

@@ -393,6 +393,20 @@ func StatusReleaseVersion(version int32) StatusOption {
 	}
 }
 
+// InstallAnnotations attaches annotations to the release
+func InstallAnnotations(annotations map[string]string) InstallOption {
+	return func(opts *options) {
+		opts.instReq.Annotations = annotations
+	}
+}
+
+// UpgradeAnnotations attaches annotations to the release
+func UpgradeAnnotations(annotations map[string]string) UpdateOption {
+	return func(opts *options) {
+		opts.updateReq.Annotations = annotations
+	}
+}
+
 // DeleteOption allows setting optional attributes when
 // performing a UninstallRelease tiller rpc.
 type DeleteOption func(*options)

pkg/tiller/release_install.go

@@ -119,9 +119,10 @@ func (s *ReleaseServer) prepareRelease(req *services.InstallReleaseRequest) (*re
 			Status:        &release.Status{Code: release.Status_UNKNOWN},
 			Description:   "Initial install underway", // Will be overwritten.
 		},
-		Manifest: manifestDoc.String(),
-		Hooks:    hooks,
-		Version:  int32(revision),
+		Manifest:    manifestDoc.String(),
+		Hooks:       hooks,
+		Version:     int32(revision),
+		Annotations: req.Annotations,
 	}
 	if len(notesTxt) > 0 {
 		rel.Info.Status.Notes = notesTxt

pkg/tiller/release_server.go

@@ -147,6 +147,12 @@ func (s *ReleaseServer) reuseValues(req *services.UpdateReleaseRequest, current
 		s.Log("copying values from %s (v%d) to new release.", current.Name, current.Version)
 		req.Values = current.Config
 	}
+
+	if len(req.Annotations) == 0 {
+		s.Log("copying annotations from %s (v%d) to new release.", current.Name, current.Version)
+		req.Annotations = current.Annotations
+	}
+
 	return nil
 }
 

pkg/tiller/release_update.go

@@ -119,9 +119,10 @@ func (s *ReleaseServer) prepareUpdate(req *services.UpdateReleaseRequest) (*rele
 			Status:        &release.Status{Code: release.Status_UNKNOWN},
 			Description:   "Preparing upgrade", // This should be overwritten later.
 		},
-		Version:  revision,
-		Manifest: manifestDoc.String(),
-		Hooks:    hooks,
+		Version:     revision,
+		Manifest:    manifestDoc.String(),
+		Hooks:       hooks,
+		Annotations: req.Annotations,
 	}
 
 	if len(notesTxt) > 0 {