allow passing flag --in-cluster to get build the kube client based on in pod config (#20)

Author: Oleg Sucharevich

package.json

@@ -1,6 +1,6 @@
 {
   "name": "venona",
-  "version": "0.12.1",
+  "version": "0.13.0",
   "description": "Codefresh agent to run on Codefresh's runtime environment and execute pipeline",
   "main": "index.js",
   "scripts": {

venonactl/cmd/install.go

@@ -41,6 +41,7 @@ var (
 
 	kubeNamespace   string
 	kubeContextName string
+	inCluster       bool
 )
 
 // installCmd represents the install command
@@ -60,6 +61,9 @@ var installCmd = &cobra.Command{
 		if kubeNamespace == "" {
 			kubeNamespace = "default"
 		}
+
+		s.KubernetesAPI.InCluster = inCluster
+
 		s.KubernetesAPI.ContextName = kubeContextName
 		s.KubernetesAPI.Namespace = kubeNamespace
 
@@ -113,6 +117,7 @@ func init() {
 	installCmd.Flags().StringVar(&kubeNamespace, "kube-namespace", viper.GetString("kube-namespace"), "Name of the namespace on which venona should be installed [$KUBE_NAMESPACE]")
 	installCmd.Flags().StringVar(&kubeContextName, "kube-context-name", viper.GetString("kube-context"), "Name of the kubernetes context on which venona should be installed (default is current-context) [$KUBE_CONTEXT]")
 	installCmd.Flags().BoolVar(&setDefaultRuntime, "set-default", false, "Mark the install runtime-environment as default one after installation")
+	installCmd.Flags().BoolVar(&inCluster, "in-cluster", false, "Set flag if venona is been installed from inside a cluster")
 }
 
 func installRuntimeEnvironment() {

venonactl/cmd/root.go

@@ -134,10 +134,12 @@ var rootCmd = &cobra.Command{
 
 		if kubeConfigPath == "" {
 			currentUser, _ := user.Current()
-			kubeConfigPath = path.Join(currentUser.HomeDir, ".kube", "config")
-			logrus.WithFields(logrus.Fields{
-				"Kube-Config-Path": kubeConfigPath,
-			}).Debug("Path to kubeconfig not set, using default")
+			if currentUser != nil {
+				kubeConfigPath = path.Join(currentUser.HomeDir, ".kube", "config")
+				logrus.WithFields(logrus.Fields{
+					"Kube-Config-Path": kubeConfigPath,
+				}).Debug("Path to kubeconfig not set, using default")
+			}
 		}
 
 		s.AppName = store.ApplicationName

venonactl/pkg/operators/helper.go

@@ -122,11 +122,17 @@ func NewKubeRESTClientConfig(s *store.Values) (*rest.Config, error) {
 
 // NewKubeClientset - returns clientset
 func NewKubeClientset(s *store.Values) (*kubernetes.Clientset, error) {
-	kubeClientConfig, err := NewKubeRESTClientConfig(s)
+	var config *rest.Config
+	var err error
+	if s.KubernetesAPI.InCluster {
+		config, err = rest.InClusterConfig()
+	} else {
+		config, err = NewKubeRESTClientConfig(s)
+	}
 	if err != nil {
 		return nil, err
 	}
-	return kubernetes.NewForConfig(kubeClientConfig)
+	return kubernetes.NewForConfig(config)
 }
 
 func getKubeObjectsFromTempalte(values map[string]interface{}) (map[string]runtime.Object, error) {

venonactl/pkg/store/store.go

@@ -43,6 +43,7 @@ type (
 		ConfigPath  string
 		Namespace   string
 		ContextName string
+		InCluster   bool
 	}
 
 	CodefreshAPI struct {