feat(install): enable/disable crd installation

pkg/install/v1alpha1/env.go

@@ -35,4 +35,12 @@ const (
 	//
 	// Default is "true"
 	CreateDefaultStorageConfig menv.ENVKey = "OPENEBS_IO_CREATE_DEFAULT_STORAGE_CONFIG"
+
+	// InstallCRD is the environment
+	// variable that flags if maya apiserver should install the CRDs
+	// As the installation moves towards helm 3, the responsibility of installing
+	// CRDs can be pushed to helm.
+	//
+	// Default is "true"
+	InstallCRD menv.ENVKey = "OPENEBS_IO_INSTALL_CRD"
 )

pkg/install/v1alpha1/env_setter.go

@@ -211,6 +211,10 @@ func (e *envInstall) List() (l *envList, err error) {
 		Key:   DefaultCstorSparsePool,
 		Value: "false",
 	})
+	l.Items = append(l.Items, &env{
+		Key:   InstallCRD,
+		Value: "true",
+	})
 	l.Items = append(l.Items, &env{
 		Key:   menv.CASTemplateFeatureGateENVK,
 		Value: "true",

pkg/install/v1alpha1/env_setter_test.go

@@ -26,7 +26,7 @@ func TestEnvInstallCount(t *testing.T) {
 	tests := map[string]struct {
 		expectedCount int
 	}{
-		"101": {20},
+		"101": {21},
 	}
 
 	for name, mock := range tests {

pkg/install/v1alpha1/flags.go

@@ -37,3 +37,10 @@ func IsCstorSparsePoolEnabled() bool {
 	enabled, _ := strconv.ParseBool(menv.Get(DefaultCstorSparsePool))
 	return IsDefaultStorageConfigEnabled() && enabled
 }
+
+// IsInstallCRDEnabled reads from env variable to check
+// whether CRDs should be created by default or not.
+func IsInstallCRDEnabled() (enabled bool) {
+	enabled, _ = strconv.ParseBool(menv.Get(InstallCRD))
+	return
+}

pkg/install/v1alpha1/openebs_crds.go

@@ -469,7 +469,7 @@ spec:
 
 // OpenEBSCRDArtifacts returns the CRDs required for latest version
 func OpenEBSCRDArtifacts() (list artifactList) {
-	list.Items = append(list.Items, ParseArtifactListFromMultipleYamls(openEBSCRDs{})...)
+	list.Items = append(list.Items, ParseArtifactListFromMultipleYamlsIf(openEBSCRDs{}, IsInstallCRDEnabled)...)
 	return
 }