Merge pull request #7648 from bacongobbler/fix-6794

feat(install): introduce --create-namespace

cmd/helm/install.go

@@ -136,6 +136,7 @@ func newInstallCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 }
 
 func addInstallFlags(f *pflag.FlagSet, client *action.Install, valueOpts *values.Options) {
+	f.BoolVar(&client.CreateNamespace, "create-namespace", false, "create the release namespace if not present")
 	f.BoolVar(&client.DryRun, "dry-run", false, "simulate an install")
 	f.BoolVar(&client.DisableHooks, "no-hooks", false, "prevent hooks from running during install")
 	f.BoolVar(&client.Replace, "replace", false, "re-use the given name, only if that name is a deleted release which remains in the history. This is unsafe in production")

cmd/helm/upgrade.go

@@ -65,6 +65,7 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	client := action.NewUpgrade(cfg)
 	valueOpts := &values.Options{}
 	var outfmt output.Format
+	var createNamespace bool
 
 	cmd := &cobra.Command{
 		Use:   "upgrade [RELEASE] [CHART]",
@@ -100,6 +101,7 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 						fmt.Fprintf(out, "Release %q does not exist. Installing it now.\n", args[0])
 					}
 					instClient := action.NewInstall(cfg)
+					instClient.CreateNamespace = createNamespace
 					instClient.ChartPathOptions = client.ChartPathOptions
 					instClient.DryRun = client.DryRun
 					instClient.DisableHooks = client.DisableHooks
@@ -159,6 +161,7 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	})
 
 	f := cmd.Flags()
+	f.BoolVar(&createNamespace, "create-namespace", false, "if --install is set, create the release namespace if not present")
 	f.BoolVarP(&client.Install, "install", "i", false, "if a release by this name doesn't already exist, run an install")
 	f.BoolVar(&client.Devel, "devel", false, "use development versions, too. Equivalent to version '>0.0.0-0'. If --version is set, this is ignored")
 	f.BoolVar(&client.DryRun, "dry-run", false, "simulate an upgrade")

pkg/action/install.go

@@ -29,8 +29,11 @@ import (
 
 	"github.com/Masterminds/sprig/v3"
 	"github.com/pkg/errors"
+	v1 "k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/cli-runtime/pkg/resource"
+	"sigs.k8s.io/yaml"
 
 	"helm.sh/helm/v3/pkg/chart"
 	"helm.sh/helm/v3/pkg/chartutil"
@@ -69,6 +72,7 @@ type Install struct {
 	ChartPathOptions
 
 	ClientOnly               bool
+	CreateNamespace          bool
 	DryRun                   bool
 	DisableHooks             bool
 	Replace                  bool
@@ -265,6 +269,32 @@ func (i *Install) Run(chrt *chart.Chart, vals map[string]interface{}) (*release.
 		return rel, nil
 	}
 
+	if i.CreateNamespace {
+		ns := &v1.Namespace{
+			TypeMeta: metav1.TypeMeta{
+				APIVersion: "v1",
+				Kind:       "Namespace",
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Name: i.Namespace,
+				Labels: map[string]string{
+					"name": i.Namespace,
+				},
+			},
+		}
+		buf, err := yaml.Marshal(ns)
+		if err != nil {
+			return nil, err
+		}
+		resourceList, err := i.cfg.KubeClient.Build(bytes.NewBuffer(buf), true)
+		if err != nil {
+			return nil, err
+		}
+		if _, err := i.cfg.KubeClient.Create(resourceList); err != nil && !apierrors.IsAlreadyExists(err) {
+			return nil, err
+		}
+	}
+
 	// If Replace is true, we need to supercede the last release.
 	if i.Replace {
 		if err := i.replaceRelease(rel); err != nil {