[WIP]: add CRD support

storage/kubernetes/client.go

@@ -249,7 +249,7 @@ func (c *client) put(resource, name string, v interface{}) error {
 	return checkHTTPErr(resp, http.StatusOK)
 }
 
-func newClient(cluster k8sapi.Cluster, user k8sapi.AuthInfo, namespace string, logger logrus.FieldLogger) (*client, error) {
+func newClient(cluster k8sapi.Cluster, user k8sapi.AuthInfo, namespace string, logger logrus.FieldLogger, apiVersion string) (*client, error) {
 	tlsConfig := cryptopasta.DefaultTLSConfig()
 	data := func(b string, file string) ([]byte, error) {
 		if b != "" {
@@ -325,13 +325,19 @@ func newClient(cluster k8sapi.Cluster, user k8sapi.AuthInfo, namespace string, l
 		}
 	}
 
+	// if the apiVersion is not configured default to `oidc.coreos.com/v1`
+	if apiVersion == "" {
+		apiVersion = "oidc.coreos.com/v1"
+	}
+
+	logger.Infof("kubernetes client apiVersion = %s", apiVersion)
 	// TODO(ericchiang): make API Group and version configurable.
 	return &client{
 		client:     &http.Client{Transport: t},
 		baseURL:    cluster.Server,
 		hash:       func() hash.Hash { return fnv.New64() },
 		namespace:  namespace,
-		apiVersion: "oidc.coreos.com/v1",
+		apiVersion: apiVersion,
 		logger:     logger,
 	}, nil
 }