Fix potential race condition

Fix a potential race condition where a just-deployed application may not
appear in juju status immediately.

Signed-off-by: Adam Israel <adam.israel@canonical.com>

diff --git a/common/python/rift/mano/utils/juju_api.py b/common/python/rift/mano/utils/juju_api.py
index 40ff14c..81d54a9 100755 (executable)
--- a/common/python/rift/mano/utils/juju_api.py
+++ b/common/python/rift/mano/utils/juju_api.py
@@ -206,8 +206,10 @@ class JujuApi(object):
             await self.login()
 
         app = None
-        if application in self.model.applications:
-            app = self.model.applications[application]
+        if self.model:
+            if self.model.applications:
+                if application in self.model.applications:
+                    app = self.model.applications[application]
         return app
 
     async def get_application_status(self, application, status=None):

diff --git a/rwcm/plugins/rwconman/rift/tasklets/rwconmantasklet/jujuconf.py b/rwcm/plugins/rwconman/rift/tasklets/rwconmantasklet/jujuconf.py
index 0b7ecae..33aeed6 100644 (file)
--- a/rwcm/plugins/rwconman/rift/tasklets/rwconmantasklet/jujuconf.py
+++ b/rwcm/plugins/rwconman/rift/tasklets/rwconmantasklet/jujuconf.py
@@ -251,7 +251,6 @@ class JujuConfigPlugin(riftcm_config_plugin.RiftCMConfigPluginBase):
             if service in self._tasks:
                 tasks = []
                 for action in self._tasks[service].keys():
-                    #if self.check_task_status(service, action):
                     tasks.append(action)
                 del tasks
         except KeyError as e:
@@ -270,35 +269,6 @@ class JujuConfigPlugin(riftcm_config_plugin.RiftCMConfigPluginBase):
         """
         return True
 
-    def check_task_status(self, service, action):
-        #self.log.debug("jujuCA: check task status for %s, %s" % (service, action))
-        try:
-            task = self._tasks[service][action]
-            if task.done():
-                self.log.debug("jujuCA: Task for %s, %s done" % (service, action))
-                e = task.exception()
-                if e:
-                    self.log.error("jujuCA: Error in task for {} and {} : {}".
-                                   format(service, action, e))
-                    raise Exception(e)
-                r= task.result()
-                if r:
-                    self.log.debug("jujuCA: Task for {} and {}, returned {}".
-                                   format(service, action,r))
-                return True
-            else:
-                self.log.debug("jujuCA: task {}, {} not done".
-                               format(service, action))
-                return False
-        except KeyError as e:
-            self.log.error("jujuCA: KeyError for task for {} and {}: {}".
-                           format(service, action, e))
-        except Exception as e:
-            self.log.error("jujuCA: Error for task for {} and {}: {}".
-                           format(service, action, e))
-            raise
-        return True
-
     @asyncio.coroutine
     def _vnf_config_primitive(self, nsr_id, vnfr_id, primitive,
                               vnf_config=None, wait=False):
@@ -732,12 +702,13 @@ class JujuConfigPlugin(riftcm_config_plugin.RiftCMConfigPluginBase):
 
         rc = 'configuring'
 
-        if not self.check_task_status(service, 'deploy'):
-            return rc
-
         try:
-            resp = yield from self.api.get_service_status(application=service)
-            self._log.debug("jujuCA: Get service %s status? %s", service, resp)
+            # Get the status of the application
+            resp = yield from self.api.get_application_status(service)
+
+            # No status means the application is still pending deployment
+            if resp is None:
+                return rc
 
             if resp == 'error':
                 return 'error'