Merge pull request #7932 from waveywaves/7537-install-only-crds-fails

Add checking of length of resourceList before install of uninstall

cmd/helm/install_test.go

@@ -195,6 +195,11 @@ func TestInstall(t *testing.T) {
 			cmd:    "install aeneas testdata/testcharts/deprecated --namespace default",
 			golden: "output/deprecated-chart.txt",
 		},
+		// Install chart with only crds
+		{
+			name: "install chart with only crds",
+			cmd:  "install crd-test testdata/testcharts/chart-with-only-crds --namespace default",
+		},
 	}
 
 	runTestActionCmd(t, tests)

cmd/helm/testdata/testcharts/chart-with-only-crds/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

cmd/helm/testdata/testcharts/chart-with-only-crds/Chart.yaml

@@ -0,0 +1,21 @@
+apiVersion: v2
+name: crd-test
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application.
+appVersion: 1.16.0

cmd/helm/testdata/testcharts/chart-with-only-crds/crds/test-crd.yaml

@@ -0,0 +1,19 @@
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  name: tests.test.io
+spec:
+  group: test.io
+  names:
+    kind: Test
+    listKind: TestList
+    plural: tests
+    singular: test
+  scope: Namespaced
+  versions:
+    - name : v1alpha2
+      served: true
+      storage: true
+    - name : v1alpha1
+      served: true
+      storage: false

pkg/action/install.go

@@ -144,6 +144,7 @@ func (i *Install) installCRDs(crds []chart.CRD) error {
 		}
 		totalItems = append(totalItems, res...)
 	}
+	if len(totalItems) > 0 {
 		// Invalidate the local cache, since it will not have the new CRDs
 		// present.
 		discoveryClient, err := i.cfg.RESTClientGetter.ToDiscoveryClient()
@@ -153,11 +154,14 @@ func (i *Install) installCRDs(crds []chart.CRD) error {
 		i.cfg.Log("Clearing discovery cache")
 		discoveryClient.Invalidate()
 		// Give time for the CRD to be recognized.
+
 		if err := i.cfg.KubeClient.Wait(totalItems, 60*time.Second); err != nil {
 			return err
 		}
+
 		// Make sure to force a rebuild of the cache.
 		discoveryClient.ServerGroups()
+	}
 	return nil
 }
 
@@ -264,7 +268,7 @@ func (i *Install) Run(chrt *chart.Chart, vals map[string]interface{}) (*release.
 	// we'll end up in a state where we will delete those resources upon
 	// deleting the release because the manifest will be pointing at that
 	// resource
-	if !i.ClientOnly && !isUpgrade {
+	if !i.ClientOnly && !isUpgrade && len(resources) > 0 {
 		toBeAdopted, err = existingResourceConflict(resources, rel.Name, rel.Namespace)
 		if err != nil {
 			return nil, errors.Wrap(err, "rendered manifests contain a resource that already exists. Unable to continue with install")
@@ -329,11 +333,11 @@ func (i *Install) Run(chrt *chart.Chart, vals map[string]interface{}) (*release.
 	// At this point, we can do the install. Note that before we were detecting whether to
 	// do an update, but it's not clear whether we WANT to do an update if the re-use is set
 	// to true, since that is basically an upgrade operation.
-	if len(toBeAdopted) == 0 {
+	if len(toBeAdopted) == 0 && len(resources) > 0 {
 		if _, err := i.cfg.KubeClient.Create(resources); err != nil {
 			return i.failRelease(rel, err)
 		}
-	} else {
+	} else if len(resources) > 0 {
 		if _, err := i.cfg.KubeClient.Update(toBeAdopted, resources, false); err != nil {
 			return i.failRelease(rel, err)
 		}

pkg/action/uninstall.go

@@ -169,6 +169,7 @@ func joinErrors(errs []error) string {
 
 // deleteRelease deletes the release and returns manifests that were kept in the deletion process
 func (u *Uninstall) deleteRelease(rel *release.Release) (string, []error) {
+	var errs []error
 	caps, err := u.cfg.getCapabilities()
 	if err != nil {
 		return rel.Manifest, []error{errors.Wrap(err, "could not get apiVersions from Kubernetes")}
@@ -194,11 +195,13 @@ func (u *Uninstall) deleteRelease(rel *release.Release) (string, []error) {
 	for _, file := range filesToDelete {
 		builder.WriteString("\n---\n" + file.Content)
 	}
+
 	resources, err := u.cfg.KubeClient.Build(strings.NewReader(builder.String()), false)
 	if err != nil {
 		return "", []error{errors.Wrap(err, "unable to build kubernetes objects for delete")}
 	}
-
+	if len(resources) > 0 {
-	_, errs := u.cfg.KubeClient.Delete(resources)
+		_, errs = u.cfg.KubeClient.Delete(resources)
+	}
 	return kept, errs
 }