Fix black issues

[osm/N2VC.git] / n2vc / k8s_juju_conn.py

diff --git a/n2vc/k8s_juju_conn.py b/n2vc/k8s_juju_conn.py
index 149947d..29e6c1d 100644 (file)
--- a/n2vc/k8s_juju_conn.py
+++ b/n2vc/k8s_juju_conn.py
@@ -13,6 +13,7 @@
 #     limitations under the License.
 
 import asyncio
+from typing import Union
 import os
 import uuid
 import yaml
@@ -76,6 +77,7 @@ class K8sJujuConnector(K8sConnector):
         db_uri = EnvironConfig(prefixes=["OSMLCM_", "OSMMON_"]).get("database_uri")
         self._store = MotorStore(db_uri)
         self.loading_libjuju = asyncio.Lock(loop=self.loop)
+        self.uninstall_locks = {}
 
         self.log.debug("K8S Juju connector initialized")
         # TODO: Remove these commented lines:
@@ -128,7 +130,7 @@ class K8sJujuConnector(K8sConnector):
             cleanup_data.append(
                 {
                     "delete": kubectl.delete_cluster_role,
-                    "args": (metadata_name),
+                    "args": (metadata_name,),
                 }
             )
 
@@ -139,7 +141,7 @@ class K8sJujuConnector(K8sConnector):
             cleanup_data.append(
                 {
                     "delete": kubectl.delete_service_account,
-                    "args": (metadata_name),
+                    "args": (metadata_name,),
                 }
             )
 
@@ -150,7 +152,7 @@ class K8sJujuConnector(K8sConnector):
             cleanup_data.append(
                 {
                     "delete": kubectl.delete_service_account,
-                    "args": (metadata_name),
+                    "args": (metadata_name,),
                 }
             )
             token, client_cert_data = await kubectl.get_secret_data(
@@ -302,6 +304,10 @@ class K8sJujuConnector(K8sConnector):
             raise K8sException("bundle must be set")
 
         if bundle.startswith("cs:"):
+            # For Juju Bundles provided by the Charm Store
+            pass
+        elif bundle.startswith("ch:"):
+            # For Juju Bundles provided by the Charm Hub (this only works for juju version >= 2.9)
             pass
         elif bundle.startswith("http"):
             # Download the file
@@ -491,18 +497,30 @@ class K8sJujuConnector(K8sConnector):
         """
 
         self.log.debug("[uninstall] Destroying model")
-        libjuju = await self._get_libjuju(kwargs.get("vca_id"))
 
-        await libjuju.destroy_model(kdu_instance, total_timeout=3600)
+        will_not_delete = False
+        if kdu_instance not in self.uninstall_locks:
+            self.uninstall_locks[kdu_instance] = asyncio.Lock(loop=self.loop)
+        delete_lock = self.uninstall_locks[kdu_instance]
 
-        # self.log.debug("[uninstall] Model destroyed and disconnecting")
-        # await controller.disconnect()
+        while delete_lock.locked():
+            will_not_delete = True
+            await asyncio.sleep(0.1)
 
+        if will_not_delete:
+            self.log.info("Model {} deleted by another worker.".format(kdu_instance))
+            return True
+
+        try:
+            async with delete_lock:
+                libjuju = await self._get_libjuju(kwargs.get("vca_id"))
+
+                await libjuju.destroy_model(kdu_instance, total_timeout=3600)
+        finally:
+            self.uninstall_locks.pop(kdu_instance)
+
+        self.log.debug(f"[uninstall] Model {kdu_instance} destroyed")
         return True
-        # TODO: Remove these commented lines
-        # if not self.authenticated:
-        #     self.log.debug("[uninstall] Connecting to controller")
-        #     await self.login(cluster_uuid)
 
     async def exec_primitive(
         self,
@@ -641,7 +659,7 @@ class K8sJujuConnector(K8sConnector):
         complete_status: bool = False,
         yaml_format: bool = False,
         **kwargs,
-    ) -> dict:
+    ) -> Union[str, dict]:
         """Get the status of the KDU
 
         Get the current status of the KDU instance.