X-Git-Url: https://osm.etsi.org/gitweb/?a=blobdiff_plain;f=juju%2Funit.py;h=9a7540459cfc320eac17eaa0de1c4e358223ccfe;hb=de5d31a2f09275264d3139720f5a287cef8b438b;hp=3dbc1e963577c8882ada5457aa0396073ca21493;hpb=b89f2fff0ca59f55a5caed03d15e34884721c88b;p=osm%2FN2VC.git

diff --git a/juju/unit.py b/juju/unit.py
index 3dbc1e9..9a75404 100644
--- a/juju/unit.py
+++ b/juju/unit.py
@@ -1,6 +1,6 @@
-import asyncio
 import logging
-from datetime import datetime
+
+from dateutil.parser import parse as parse_date
 
 from . import model
 from .client import client
@@ -14,48 +14,46 @@ class Unit(model.ModelEntity):
         """Returns the current agent status string.
 
         """
-        return self.data['agent-status']['current']
+        return self.safe_data['agent-status']['current']
 
     @property
     def agent_status_since(self):
         """Get the time when the `agent_status` was last updated.
 
         """
-        since = self.data['agent-status']['since']
-        # Juju gives us nanoseconds, but Python only supports microseconds
-        since = since[:26]
-        return datetime.strptime(since, "%Y-%m-%dT%H:%M:%S.%f")
+        return parse_date(self.safe_data['agent-status']['since'])
 
     @property
     def agent_status_message(self):
         """Get the agent status message.
 
         """
-        return self.data['agent-status']['message']
+        return self.safe_data['agent-status']['message']
 
     @property
     def workload_status(self):
         """Returns the current workload status string.
 
         """
-        return self.data['workload-status']['current']
+        return self.safe_data['workload-status']['current']
 
     @property
     def workload_status_since(self):
         """Get the time when the `workload_status` was last updated.
 
         """
-        since = self.data['workload-status']['since']
-        # Juju gives us nanoseconds, but Python only supports microseconds
-        since = since[:26]
-        return datetime.strptime(since, "%Y-%m-%dT%H:%M:%S.%f")
+        return parse_date(self.safe_data['workload-status']['since'])
 
     @property
     def workload_status_message(self):
         """Get the workload status message.
 
         """
-        return self.data['workload-status']['message']
+        return self.safe_data['workload-status']['message']
+
+    @property
+    def tag(self):
+        return 'unit-%s' % self.name.replace('/', '-')
 
     def add_storage(self, name, constraints=None):
         """Add unit storage dynamically.
@@ -108,9 +106,7 @@ class Unit(model.ModelEntity):
 
         :param str command: The command to run
         :param int timeout: Time to wait before command is considered failed
-
-        Returns a tuple containing the stdout, stderr, and return code
-        from the command.
+        :returns: A :class:`juju.action.Action` instance.
 
         """
         action = client.ActionFacade()
@@ -128,14 +124,40 @@ class Unit(model.ModelEntity):
         )
         return await self.model.wait_for_action(res.results[0].action.tag)
 
-    def run_action(self, action_name, **params):
-        """Run action on this unit.
+    async def run_action(self, action_name, **params):
+        """Run an action on this unit.
 
         :param str action_name: Name of action to run
         :param \*\*params: Action parameters
-
-        """
-        pass
+        :returns: A :class:`juju.action.Action` instance.
+
+        Note that this only enqueues the action.  You will need to call
+        ``action.wait()`` on the resulting `Action` instance if you wish
+        to block until the action is complete.
+
+        """
+        action_facade = client.ActionFacade()
+        action_facade.connect(self.connection)
+
+        log.debug('Starting action `%s` on %s', action_name, self.name)
+
+        res = await action_facade.Enqueue([client.Action(
+            name=action_name,
+            parameters=params,
+            receiver=self.tag,
+        )])
+        action = res.results[0].action
+        error = res.results[0].error
+        if error and error.code == 'not found':
+            raise ValueError('Action `%s` not found on %s' % (action_name,
+                                                              self.name))
+        elif error:
+            raise Exception('Unknown action error: %s' % error.serialize())
+        action_id = action.tag[len('action-'):]
+        log.debug('Action started as %s', action_id)
+        # we mustn't use wait_for_action because that blocks until the
+        # action is complete, rather than just being in the model
+        return await self.model._wait_for_new('action', action_id)
 
     def scp(
             self, source_path, user=None, destination_path=None, proxy=False,
@@ -178,3 +200,45 @@ class Unit(model.ModelEntity):
 
         """
         pass
+
+    async def is_leader_from_status(self):
+        """
+        Check to see if this unit is the leader. Returns True if so, and
+        False if it is not, or if leadership does not make sense
+        (e.g., there is no leader in this application.)
+
+        This method is a kluge that calls FullStatus in the
+        ClientFacade to get its information. Once
+        https://bugs.launchpad.net/juju/+bug/1643691 is resolved, we
+        should add a simple .is_leader property, and deprecate this
+        method.
+
+        """
+        app = self.name.split("/")[0]
+
+        c = client.ClientFacade()
+        c.connect(self.model.connection)
+
+        status = await c.FullStatus(None)
+
+        # FullStatus may be more up to date than our model, and the
+        # unit may have gone away, or we may be doing something silly,
+        # like trying to fetch leadership for a subordinate, which
+        # will not be filed where we expect in the model. In those
+        # cases, we may simply return False, as a nonexistent or
+        # subordinate unit is not a leader.
+        if not status.applications.get(app):
+            return False
+
+        if not status.applications[app].get('units'):
+            return False
+
+        if not status.applications[app]['units'].get(self.name):
+            return False
+
+        return status.applications[app]['units'][self.name].get('leader',
+                                                                False)
+
+    async def get_metrics(self):
+        metrics = await self.model.get_metrics(self.tag)
+        return metrics[self.name]