feat(install): introduce --disable-openapi-validation

When enabled, during the rendering process, this feature flag will not validate rendered templates against the Kubernetes OpenAPI Schema.

Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>

cmd/helm/install.go

@@ -138,6 +138,7 @@ func addInstallFlags(f *pflag.FlagSet, client *action.Install, valueOpts *values
 	f.StringVar(&client.Description, "description", "", "add a custom description")
 	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.DependencyUpdate, "dependency-update", false, "run helm dependency update before installing the chart")
+	f.BoolVar(&client.DisableOpenAPIValidation, "disable-openapi-validation", false, "if set, the installation process will not validate rendered templates against the Kubernetes OpenAPI Schema")
 	f.BoolVar(&client.Atomic, "atomic", false, "if set, installation process purges chart on fail. The --wait flag will be set automatically if --atomic is used")
 	f.BoolVar(&client.SkipCRDs, "skip-crds", false, "if set, no CRDs will be installed. By default, CRDs are installed if not already present")
 	f.BoolVar(&client.SubNotes, "render-subchart-notes", false, "if set, render subchart notes along with the parent")

pkg/action/install.go

@@ -67,23 +67,24 @@ type Install struct {
 
 	ChartPathOptions
 
-	ClientOnly       bool
-	DryRun           bool
-	DisableHooks     bool
-	Replace          bool
-	Wait             bool
-	Devel            bool
-	DependencyUpdate bool
-	Timeout          time.Duration
-	Namespace        string
-	ReleaseName      string
-	GenerateName     bool
-	NameTemplate     string
-	Description      string
-	OutputDir        string
-	Atomic           bool
-	SkipCRDs         bool
-	SubNotes         bool
+	ClientOnly               bool
+	DryRun                   bool
+	DisableHooks             bool
+	Replace                  bool
+	Wait                     bool
+	Devel                    bool
+	DependencyUpdate         bool
+	Timeout                  time.Duration
+	Namespace                string
+	ReleaseName              string
+	GenerateName             bool
+	NameTemplate             string
+	Description              string
+	OutputDir                string
+	Atomic                   bool
+	SkipCRDs                 bool
+	SubNotes                 bool
+	DisableOpenAPIValidation bool
 	// APIVersions allows a manual set of supported API Versions to be passed
 	// (for things like templating). These are ignored if ClientOnly is false
 	APIVersions chartutil.VersionSet
@@ -232,7 +233,7 @@ func (i *Install) Run(chrt *chart.Chart, vals map[string]interface{}) (*release.
 	// Mark this release as in-progress
 	rel.SetStatus(release.StatusPendingInstall, "Initial install underway")
 
-	resources, err := i.cfg.KubeClient.Build(bytes.NewBufferString(rel.Manifest), true)
+	resources, err := i.cfg.KubeClient.Build(bytes.NewBufferString(rel.Manifest), !i.DisableOpenAPIValidation)
 	if err != nil {
 		return nil, errors.Wrap(err, "unable to build kubernetes objects from release manifest")
 	}