import logging
+from datetime import datetime
from . import model
from .client import client
class Unit(model.ModelEntity):
+ @property
+ def agent_status(self):
+ """Returns the current agent status string.
+
+ """
+ return self.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")
+
+ @property
+ def agent_status_message(self):
+ """Get the agent status message.
+
+ """
+ return self.data['agent-status']['message']
+
+ @property
+ def workload_status(self):
+ """Returns the current workload status string.
+
+ """
+ return self.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")
+
+ @property
+ def workload_status_message(self):
+ """Get the workload status message.
+
+ """
+ return self.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.
: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.
+
"""
action = client.ActionFacade()
action.connect(self.connection)
log.debug(
'Running `%s` on %s', command, self.name)
- return await action.Run(
+ res = await action.Run(
[],
command,
[],
timeout,
[self.name],
)
+ 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
+ :returns: An `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.
"""
- pass
+ 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,
"""
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)
+
+ try:
+ return status.applications[app]['units'][self.name].get(
+ 'leader', False)
+ except KeyError:
+ # FullStatus may be more up-to-date than the model
+ # referenced by this class. If this unit has been
+ # destroyed between the time the class was created and the
+ # time that we call this method, we'll get a KeyError. In
+ # that case, we simply return False, as a destroyed unit
+ # is not a leader.
+ return False