Fix bug 1263

[osm/N2VC.git] / n2vc / kubectl.py

diff --git a/n2vc/kubectl.py b/n2vc/kubectl.py
index 61b2dc3..31b6f55 100644 (file)
--- a/n2vc/kubectl.py
+++ b/n2vc/kubectl.py
@@ -22,6 +22,9 @@ class Kubectl:
         config.load_kube_config(config_file=config_file)
         self.logger = logging.getLogger("Kubectl")
 
+    def get_configuration(self):
+        return config.kube_config.Configuration()
+
     def get_services(self, field_selector=None, label_selector=None):
         kwargs = {}
         if field_selector:
@@ -58,3 +61,34 @@ class Kubectl:
         except ApiException as e:
             self.logger.error("Error calling get services: {}".format(e))
             raise e
+
+    def get_default_storage_class(self) -> str:
+        """
+        Default storage class
+
+        :return:    Returns the default storage class name, if exists.
+                    If not, it returns the first storage class.
+                    If there are not storage classes, returns None
+        """
+
+        storagev1 = client.StorageV1Api()
+        storage_classes = storagev1.list_storage_class()
+        selected_sc = None
+        default_sc_annotations = {
+            "storageclass.kubernetes.io/is-default-class": "true",
+            # Older clusters still use the beta annotation.
+            "storageclass.beta.kubernetes.io/is-default-class": "true",
+        }
+        for sc in storage_classes.items:
+            if not selected_sc:
+                # Select the first storage class in case there is no a default-class
+                selected_sc = sc.metadata.name
+            annotations = sc.metadata.annotations
+            if any(
+                k in annotations and annotations[k] == v
+                for k, v in default_sc_annotations.items()
+            ):
+                # Default storage
+                selected_sc = sc.metadata.name
+                break
+        return selected_sc