13 from concurrent
.futures
import CancelledError
14 from functools
import partial
15 from pathlib
import Path
18 import theblues
.charmstore
19 import theblues
.errors
22 from .client
import client
23 from .client
import watcher
24 from .client
import connection
25 from .constraints
import parse
as parse_constraints
, normalize_key
26 from .delta
import get_entity_delta
27 from .delta
import get_entity_class
28 from .exceptions
import DeadEntityException
29 from .errors
import JujuError
, JujuAPIError
30 from .placement
import parse
as parse_placement
32 log
= logging
.getLogger(__name__
)
35 class _Observer(object):
36 """Wrapper around an observer callable.
38 This wrapper allows filter criteria to be associated with the
39 callable so that it's only called for changes that meet the criteria.
42 def __init__(self
, callable_
, entity_type
, action
, entity_id
, predicate
):
43 self
.callable_
= callable_
44 self
.entity_type
= entity_type
46 self
.entity_id
= entity_id
47 self
.predicate
= predicate
49 self
.entity_id
= str(self
.entity_id
)
50 if not self
.entity_id
.startswith('^'):
51 self
.entity_id
= '^' + self
.entity_id
52 if not self
.entity_id
.endswith('$'):
55 async def __call__(self
, delta
, old
, new
, model
):
56 await self
.callable_(delta
, old
, new
, model
)
58 def cares_about(self
, delta
):
59 """Return True if this observer "cares about" (i.e. wants to be
60 called) for a this delta.
63 if (self
.entity_id
and delta
.get_id() and
64 not re
.match(self
.entity_id
, str(delta
.get_id()))):
67 if self
.entity_type
and self
.entity_type
!= delta
.entity
:
70 if self
.action
and self
.action
!= delta
.type:
73 if self
.predicate
and not self
.predicate(delta
):
79 class ModelObserver(object):
80 async def __call__(self
, delta
, old
, new
, model
):
81 handler_name
= 'on_{}_{}'.format(delta
.entity
, delta
.type)
82 method
= getattr(self
, handler_name
, self
.on_change
)
83 await method(delta
, old
, new
, model
)
85 async def on_change(self
, delta
, old
, new
, model
):
86 """Generic model-change handler.
88 :param delta: :class:`juju.client.overrides.Delta`
89 :param old: :class:`juju.model.ModelEntity`
90 :param new: :class:`juju.model.ModelEntity`
91 :param model: :class:`juju.model.Model`
97 class ModelState(object):
98 """Holds the state of the model, including the delta history of all
99 entities in the model.
102 def __init__(self
, model
):
106 def _live_entity_map(self
, entity_type
):
107 """Return an id:Entity map of all the living entities of
108 type ``entity_type``.
112 entity_id
: self
.get_entity(entity_type
, entity_id
)
113 for entity_id
, history
in self
.state
.get(entity_type
, {}).items()
114 if history
[-1] is not None
118 def applications(self
):
119 """Return a map of application-name:Application for all applications
120 currently in the model.
123 return self
._live
_entity
_map
('application')
127 """Return a map of machine-id:Machine for all machines currently in
131 return self
._live
_entity
_map
('machine')
135 """Return a map of unit-id:Unit for all units currently in
139 return self
._live
_entity
_map
('unit')
141 def entity_history(self
, entity_type
, entity_id
):
142 """Return the history deque for an entity.
145 return self
.state
[entity_type
][entity_id
]
147 def entity_data(self
, entity_type
, entity_id
, history_index
):
148 """Return the data dict for an entity at a specific index of its
152 return self
.entity_history(entity_type
, entity_id
)[history_index
]
154 def apply_delta(self
, delta
):
155 """Apply delta to our state and return a copy of the
156 affected object as it was before and after the update, e.g.:
158 old_obj, new_obj = self.apply_delta(delta)
160 old_obj may be None if the delta is for the creation of a new object,
161 e.g. a new application or unit is deployed.
163 new_obj will never be None, but may be dead (new_obj.dead == True)
164 if the object was deleted as a result of the delta being applied.
169 .setdefault(delta
.entity
, {})
170 .setdefault(delta
.get_id(), collections
.deque())
173 history
.append(delta
.data
)
174 if delta
.type == 'remove':
177 entity
= self
.get_entity(delta
.entity
, delta
.get_id())
178 return entity
.previous(), entity
181 self
, entity_type
, entity_id
, history_index
=-1, connected
=True):
182 """Return an object instance for the given entity_type and id.
184 By default the object state matches the most recent state from
185 Juju. To get an instance of the object in an older state, pass
186 history_index, an index into the history deque for the entity.
190 if history_index
< 0 and history_index
!= -1:
191 history_index
+= len(self
.entity_history(entity_type
, entity_id
))
192 if history_index
< 0:
196 self
.entity_data(entity_type
, entity_id
, history_index
)
200 entity_class
= get_entity_class(entity_type
)
202 entity_id
, self
.model
, history_index
=history_index
,
206 class ModelEntity(object):
207 """An object in the Model tree"""
209 def __init__(self
, entity_id
, model
, history_index
=-1, connected
=True):
210 """Initialize a new entity
212 :param entity_id str: The unique id of the object in the model
213 :param model: The model instance in whose object tree this
215 :history_index int: The index of this object's state in the model's
216 history deque for this entity
217 :connected bool: Flag indicating whether this object gets live updates
221 self
.entity_id
= entity_id
223 self
._history
_index
= history_index
224 self
.connected
= connected
225 self
.connection
= model
.connection
228 return '<{} entity_id="{}">'.format(type(self
).__name
__,
231 def __getattr__(self
, name
):
232 """Fetch object attributes from the underlying data dict held in the
237 return self
.safe_data
[name
]
239 name
= name
.replace('_', '-')
240 if name
in self
.safe_data
:
241 return self
.safe_data
[name
]
246 return bool(self
.data
)
248 def on_change(self
, callable_
):
249 """Add a change observer to this entity.
252 self
.model
.add_observer(
253 callable_
, self
.entity_type
, 'change', self
.entity_id
)
255 def on_remove(self
, callable_
):
256 """Add a remove observer to this entity.
259 self
.model
.add_observer(
260 callable_
, self
.entity_type
, 'remove', self
.entity_id
)
263 def entity_type(self
):
264 """A string identifying the entity type of this object, e.g.
265 'application' or 'unit', etc.
268 return self
.__class
__.__name
__.lower()
272 """Return True if this object represents the current state of the
273 entity in the underlying model.
275 This will be True except when the object represents an entity at a
276 non-latest state in history, e.g. if the object was obtained by calling
277 .previous() on another object.
280 return self
._history
_index
== -1
284 """Returns True if this entity no longer exists in the underlying
290 self
.model
.state
.entity_data(
291 self
.entity_type
, self
.entity_id
, -1) is None
296 """Returns True if this entity still exists in the underlying
304 """The data dictionary for this entity.
307 return self
.model
.state
.entity_data(
308 self
.entity_type
, self
.entity_id
, self
._history
_index
)
312 """The data dictionary for this entity.
314 If this `ModelEntity` points to the dead state, it will
315 raise `DeadEntityException`.
318 if self
.data
is None:
319 raise DeadEntityException(
320 "Entity {}:{} is dead - its attributes can no longer be "
321 "accessed. Use the .previous() method on this object to get "
322 "a copy of the object at its previous state.".format(
323 self
.entity_type
, self
.entity_id
))
327 """Return a copy of this object as was at its previous state in
330 Returns None if this object is new (and therefore has no history).
332 The returned object is always "disconnected", i.e. does not receive
336 return self
.model
.state
.get_entity(
337 self
.entity_type
, self
.entity_id
, self
._history
_index
- 1,
341 """Return a copy of this object at its next state in
344 Returns None if this object is already the latest.
346 The returned object is "disconnected", i.e. does not receive
347 live updates, unless it is current (latest).
350 if self
._history
_index
== -1:
353 new_index
= self
._history
_index
+ 1
355 new_index
== len(self
.model
.state
.entity_history(
356 self
.entity_type
, self
.entity_id
)) - 1
358 return self
.model
.state
.get_entity(
359 self
.entity_type
, self
.entity_id
, self
._history
_index
- 1,
363 """Return a copy of this object at its current state in the model.
365 Returns self if this object is already the latest.
367 The returned object is always "connected", i.e. receives
368 live updates from the model.
371 if self
._history
_index
== -1:
374 return self
.model
.state
.get_entity(self
.entity_type
, self
.entity_id
)
378 def __init__(self
, loop
=None):
379 """Instantiate a new connected Model.
381 :param loop: an asyncio event loop
384 self
.loop
= loop
or asyncio
.get_event_loop()
385 self
.connection
= None
386 self
.observers
= weakref
.WeakValueDictionary()
387 self
.state
= ModelState(self
)
389 self
._watcher
_task
= None
390 self
._watch
_shutdown
= asyncio
.Event(loop
=self
.loop
)
391 self
._watch
_received
= asyncio
.Event(loop
=self
.loop
)
392 self
._charmstore
= CharmStore(self
.loop
)
394 async def connect(self
, *args
, **kw
):
395 """Connect to an arbitrary Juju model.
397 args and kw are passed through to Connection.connect()
401 kw
['loop'] = self
.loop
402 self
.connection
= await connection
.Connection
.connect(*args
, **kw
)
403 await self
._after
_connect
()
405 async def connect_current(self
):
406 """Connect to the current Juju model.
409 self
.connection
= await connection
.Connection
.connect_current(
411 await self
._after
_connect
()
413 async def connect_model(self
, model_name
):
414 """Connect to a specific Juju model by name.
416 :param model_name: Format [controller:][user/]model
419 self
.connection
= await connection
.Connection
.connect_model(model_name
,
421 await self
._after
_connect
()
423 async def _after_connect(self
):
424 """Run initialization steps after connecting to websocket.
428 await self
._watch
_received
.wait()
429 await self
.get_info()
431 async def disconnect(self
):
432 """Shut down the watcher task and close websockets.
435 self
._stop
_watching
()
436 if self
.connection
and self
.connection
.is_open
:
437 await self
._watch
_shutdown
.wait()
438 log
.debug('Closing model connection')
439 await self
.connection
.close()
440 self
.connection
= None
442 async def add_local_charm_dir(self
, charm_dir
, series
):
443 """Upload a local charm to the model.
445 This will automatically generate an archive from
448 :param charm_dir: Path to the charm directory
449 :param series: Charm series
452 fh
= tempfile
.NamedTemporaryFile()
453 CharmArchiveGenerator(charm_dir
).make_archive(fh
.name
)
456 self
.add_local_charm
, fh
, series
, os
.stat(fh
.name
).st_size
)
457 charm_url
= await self
.loop
.run_in_executor(None, func
)
459 log
.debug('Uploaded local charm: %s -> %s', charm_dir
, charm_url
)
462 def add_local_charm(self
, charm_file
, series
, size
=None):
463 """Upload a local charm archive to the model.
465 Returns the 'local:...' url that should be used to deploy the charm.
467 :param charm_file: Path to charm zip archive
468 :param series: Charm series
469 :param size: Size of the archive, in bytes
470 :return str: 'local:...' url for deploying the charm
471 :raises: :class:`JujuError` if the upload fails
473 Uses an https endpoint at the same host:port as the wss.
474 Supports large file uploads.
478 This method will block. Consider using :meth:`add_local_charm_dir`
482 conn
, headers
, path_prefix
= self
.connection
.https_connection()
483 path
= "%s/charms?series=%s" % (path_prefix
, series
)
484 headers
['Content-Type'] = 'application/zip'
486 headers
['Content-Length'] = size
487 conn
.request("POST", path
, charm_file
, headers
)
488 response
= conn
.getresponse()
489 result
= response
.read().decode()
490 if not response
.status
== 200:
491 raise JujuError(result
)
492 result
= json
.loads(result
)
493 return result
['charm-url']
495 def all_units_idle(self
):
496 """Return True if all units are idle.
499 for unit
in self
.units
.values():
500 unit_status
= unit
.data
['agent-status']['current']
501 if unit_status
!= 'idle':
505 async def reset(self
, force
=False):
506 """Reset the model to a clean state.
508 :param bool force: Force-terminate machines.
510 This returns only after the model has reached a clean state. "Clean"
511 means no applications or machines exist in the model.
514 log
.debug('Resetting model')
515 for app
in self
.applications
.values():
517 for machine
in self
.machines
.values():
518 await machine
.destroy(force
=force
)
519 await self
.block_until(
520 lambda: len(self
.machines
) == 0
523 async def block_until(self
, *conditions
, timeout
=None, wait_period
=0.5):
524 """Return only after all conditions are true.
528 while not all(c() for c
in conditions
):
529 await asyncio
.sleep(wait_period
, loop
=self
.loop
)
530 await asyncio
.wait_for(_block(), timeout
, loop
=self
.loop
)
533 def applications(self
):
534 """Return a map of application-name:Application for all applications
535 currently in the model.
538 return self
.state
.applications
542 """Return a map of machine-id:Machine for all machines currently in
546 return self
.state
.machines
550 """Return a map of unit-id:Unit for all units currently in
554 return self
.state
.units
556 async def get_info(self
):
557 """Return a client.ModelInfo object for this Model.
559 Retrieves latest info for this Model from the api server. The
560 return value is cached on the Model.info attribute so that the
561 valued may be accessed again without another api call, if
564 This method is called automatically when the Model is connected,
565 resulting in Model.info being initialized without requiring an
566 explicit call to this method.
569 facade
= client
.ClientFacade()
570 facade
.connect(self
.connection
)
572 self
.info
= await facade
.ModelInfo()
573 log
.debug('Got ModelInfo: %s', vars(self
.info
))
578 self
, callable_
, entity_type
=None, action
=None, entity_id
=None,
580 """Register an "on-model-change" callback
582 Once the model is connected, ``callable_``
583 will be called each time the model changes. ``callable_`` should
584 be Awaitable and accept the following positional arguments:
586 delta - An instance of :class:`juju.delta.EntityDelta`
587 containing the raw delta data recv'd from the Juju
590 old_obj - If the delta modifies an existing object in the model,
591 old_obj will be a copy of that object, as it was before the
592 delta was applied. Will be None if the delta creates a new
595 new_obj - A copy of the new or updated object, after the delta
596 is applied. Will be None if the delta removes an entity
599 model - The :class:`Model` itself.
601 Events for which ``callable_`` is called can be specified by passing
602 entity_type, action, and/or entitiy_id filter criteria, e.g.::
606 entity_type='application', action='add', entity_id='ubuntu')
608 For more complex filtering conditions, pass a predicate function. It
609 will be called with a delta as its only argument. If the predicate
610 function returns True, the ``callable_`` will be called.
613 observer
= _Observer(
614 callable_
, entity_type
, action
, entity_id
, predicate
)
615 self
.observers
[observer
] = callable_
618 """Start an asynchronous watch against this model.
620 See :meth:`add_observer` to register an onchange callback.
623 async def _start_watch():
624 self
._watch
_shutdown
.clear()
626 allwatcher
= watcher
.AllWatcher()
627 self
._watch
_conn
= await self
.connection
.clone()
628 allwatcher
.connect(self
._watch
_conn
)
630 results
= await allwatcher
.Next()
631 for delta
in results
.deltas
:
632 delta
= get_entity_delta(delta
)
633 old_obj
, new_obj
= self
.state
.apply_delta(delta
)
634 # XXX: Might not want to shield at this level
635 # We are shielding because when the watcher is
636 # canceled (on disconnect()), we don't want all of
637 # its children (every observer callback) to be
638 # canceled with it. So we shield them. But this means
639 # they can *never* be canceled.
640 await asyncio
.shield(
641 self
._notify
_observers
(delta
, old_obj
, new_obj
),
643 self
._watch
_received
.set()
644 except CancelledError
:
645 log
.debug('Closing watcher connection')
646 await self
._watch
_conn
.close()
647 self
._watch
_shutdown
.set()
648 self
._watch
_conn
= None
650 log
.debug('Starting watcher task')
651 self
._watcher
_task
= self
.loop
.create_task(_start_watch())
653 def _stop_watching(self
):
654 """Stop the asynchronous watch against this model.
657 log
.debug('Stopping watcher task')
658 if self
._watcher
_task
:
659 self
._watcher
_task
.cancel()
661 async def _notify_observers(self
, delta
, old_obj
, new_obj
):
662 """Call observing callbacks, notifying them of a change in model state
664 :param delta: The raw change from the watcher
665 (:class:`juju.client.overrides.Delta`)
666 :param old_obj: The object in the model that this delta updates.
668 :param new_obj: The object in the model that is created or updated
669 by applying this delta.
672 if new_obj
and not old_obj
:
676 'Model changed: %s %s %s',
677 delta
.entity
, delta
.type, delta
.get_id())
679 for o
in self
.observers
:
680 if o
.cares_about(delta
):
681 asyncio
.ensure_future(o(delta
, old_obj
, new_obj
, self
),
684 async def _wait(self
, entity_type
, entity_id
, action
, predicate
=None):
686 Block the calling routine until a given action has happened to the
689 :param entity_type: The entity's type.
690 :param entity_id: The entity's id.
691 :param action: the type of action (e.g., 'add', 'change', or 'remove')
692 :param predicate: optional callable that must take as an
693 argument a delta, and must return a boolean, indicating
694 whether the delta contains the specific action we're looking
695 for. For example, you might check to see whether a 'change'
696 has a 'completed' status. See the _Observer class for details.
699 q
= asyncio
.Queue(loop
=self
.loop
)
701 async def callback(delta
, old
, new
, model
):
702 await q
.put(delta
.get_id())
704 self
.add_observer(callback
, entity_type
, action
, entity_id
, predicate
)
705 entity_id
= await q
.get()
706 # object might not be in the entity_map if we were waiting for a
708 return self
.state
._live
_entity
_map
(entity_type
).get(entity_id
)
710 async def _wait_for_new(self
, entity_type
, entity_id
=None, predicate
=None):
711 """Wait for a new object to appear in the Model and return it.
713 Waits for an object of type ``entity_type`` with id ``entity_id``.
714 If ``entity_id`` is ``None``, it will wait for the first new entity
717 This coroutine blocks until the new object appears in the model.
720 # if the entity is already in the model, just return it
721 if entity_id
in self
.state
._live
_entity
_map
(entity_type
):
722 return self
.state
._live
_entity
_map
(entity_type
)[entity_id
]
723 # if we know the entity_id, we can trigger on any action that puts
724 # the enitty into the model; otherwise, we have to watch for the
725 # next "add" action on that entity_type
726 action
= 'add' if entity_id
is None else None
727 return await self
._wait
(entity_type
, entity_id
, action
, predicate
)
729 async def wait_for_action(self
, action_id
):
730 """Given an action, wait for it to complete."""
732 if action_id
.startswith("action-"):
733 # if we've been passed action.tag, transform it into the
734 # id that the api deltas will use.
735 action_id
= action_id
[7:]
737 def predicate(delta
):
738 return delta
.data
['status'] in ('completed', 'failed')
740 return await self
._wait
('action', action_id
, 'change', predicate
)
742 async def add_machine(
743 self
, spec
=None, constraints
=None, disks
=None, series
=None):
744 """Start a new, empty machine and optionally a container, or add a
745 container to a machine.
747 :param str spec: Machine specification
750 (None) - starts a new machine
751 'lxd' - starts a new machine with one lxd container
752 'lxd:4' - starts a new lxd container on machine 4
753 'ssh:user@10.10.0.3' - manually provisions a machine with ssh
754 'zone=us-east-1a' - starts a machine in zone us-east-1s on AWS
755 'maas2.name' - acquire machine maas2.name on MAAS
757 :param dict constraints: Machine constraints
764 :param list disks: List of disk constraint dictionaries
773 :param str series: Series, e.g. 'xenial'
775 Supported container types are: lxd, kvm
777 When deploying a container to an existing machine, constraints cannot
781 params
= client
.AddMachineParams()
782 params
.jobs
= ['JobHostUnits']
785 placement
= parse_placement(spec
)
787 params
.placement
= placement
[0]
790 params
.constraints
= client
.Value
.from_json(constraints
)
794 client
.Constraints
.from_json(o
) for o
in disks
]
797 params
.series
= series
799 # Submit the request.
800 client_facade
= client
.ClientFacade()
801 client_facade
.connect(self
.connection
)
802 results
= await client_facade
.AddMachines([params
])
803 error
= results
.machines
[0].error
805 raise ValueError("Error adding machine: %s", error
.message
)
806 machine_id
= results
.machines
[0].machine
807 log
.debug('Added new machine %s', machine_id
)
808 return await self
._wait
_for
_new
('machine', machine_id
)
810 async def add_relation(self
, relation1
, relation2
):
811 """Add a relation between two applications.
813 :param str relation1: '<application>[:<relation_name>]'
814 :param str relation2: '<application>[:<relation_name>]'
817 app_facade
= client
.ApplicationFacade()
818 app_facade
.connect(self
.connection
)
821 'Adding relation %s <-> %s', relation1
, relation2
)
824 result
= await app_facade
.AddRelation([relation1
, relation2
])
825 except JujuAPIError
as e
:
826 if 'relation already exists' not in e
.message
:
829 'Relation %s <-> %s already exists', relation1
, relation2
)
830 # TODO: if relation already exists we should return the
831 # Relation ModelEntity here
834 def predicate(delta
):
836 for endpoint
in delta
.data
['endpoints']:
837 endpoints
[endpoint
['application-name']] = endpoint
['relation']
838 return endpoints
== result
.endpoints
840 return await self
._wait
_for
_new
('relation', None, predicate
)
842 def add_space(self
, name
, *cidrs
):
843 """Add a new network space.
845 Adds a new space with the given name and associates the given
846 (optional) list of existing subnet CIDRs with it.
848 :param str name: Name of the space
849 :param \*cidrs: Optional list of existing subnet CIDRs
852 raise NotImplementedError()
854 async def add_ssh_key(self
, user
, key
):
855 """Add a public SSH key to this model.
857 :param str user: The username of the user
858 :param str key: The public ssh key
861 key_facade
= client
.KeyManagerFacade()
862 key_facade
.connect(self
.connection
)
863 return await key_facade
.AddKeys([key
], user
)
864 add_ssh_keys
= add_ssh_key
866 def add_subnet(self
, cidr_or_id
, space
, *zones
):
867 """Add an existing subnet to this model.
869 :param str cidr_or_id: CIDR or provider ID of the existing subnet
870 :param str space: Network space with which to associate
871 :param str \*zones: Zone(s) in which the subnet resides
874 raise NotImplementedError()
876 def get_backups(self
):
877 """Retrieve metadata for backups in this model.
880 raise NotImplementedError()
882 def block(self
, *commands
):
883 """Add a new block to this model.
885 :param str \*commands: The commands to block. Valid values are
886 'all-changes', 'destroy-model', 'remove-object'
889 raise NotImplementedError()
891 def get_blocks(self
):
892 """List blocks for this model.
895 raise NotImplementedError()
897 def get_cached_images(self
, arch
=None, kind
=None, series
=None):
898 """Return a list of cached OS images.
900 :param str arch: Filter by image architecture
901 :param str kind: Filter by image kind, e.g. 'lxd'
902 :param str series: Filter by image series, e.g. 'xenial'
905 raise NotImplementedError()
907 def create_backup(self
, note
=None, no_download
=False):
908 """Create a backup of this model.
910 :param str note: A note to store with the backup
911 :param bool no_download: Do not download the backup archive
912 :return str: Path to downloaded archive
915 raise NotImplementedError()
917 def create_storage_pool(self
, name
, provider_type
, **pool_config
):
918 """Create or define a storage pool.
920 :param str name: Name to give the storage pool
921 :param str provider_type: Pool provider type
922 :param \*\*pool_config: key/value pool configuration pairs
925 raise NotImplementedError()
928 self
, no_tail
=False, exclude_module
=None, include_module
=None,
929 include
=None, level
=None, limit
=0, lines
=10, replay
=False,
931 """Get log messages for this model.
933 :param bool no_tail: Stop after returning existing log messages
934 :param list exclude_module: Do not show log messages for these logging
936 :param list include_module: Only show log messages for these logging
938 :param list include: Only show log messages for these entities
939 :param str level: Log level to show, valid options are 'TRACE',
940 'DEBUG', 'INFO', 'WARNING', 'ERROR,
941 :param int limit: Return this many of the most recent (possibly
942 filtered) lines are shown
943 :param int lines: Yield this many of the most recent lines, and keep
945 :param bool replay: Yield the entire log, and keep yielding
946 :param list exclude: Do not show log messages for these entities
949 raise NotImplementedError()
951 def _get_series(self
, entity_url
, entity
):
952 # try to get the series from the provided charm URL
953 if entity_url
.startswith('cs:'):
954 parts
= entity_url
[3:].split('/')
956 parts
= entity_url
.split('/')
957 if parts
[0].startswith('~'):
960 # series was specified in the URL
962 # series was not supplied at all, so use the newest
963 # supported series according to the charm store
964 ss
= entity
['Meta']['supported-series']
965 return ss
['SupportedSeries'][0]
968 self
, entity_url
, application_name
=None, bind
=None, budget
=None,
969 channel
=None, config
=None, constraints
=None, force
=False,
970 num_units
=1, plan
=None, resources
=None, series
=None, storage
=None,
972 """Deploy a new service or bundle.
974 :param str entity_url: Charm or bundle url
975 :param str application_name: Name to give the service
976 :param dict bind: <charm endpoint>:<network space> pairs
977 :param dict budget: <budget name>:<limit> pairs
978 :param str channel: Charm store channel from which to retrieve
979 the charm or bundle, e.g. 'development'
980 :param dict config: Charm configuration dictionary
981 :param constraints: Service constraints
982 :type constraints: :class:`juju.Constraints`
983 :param bool force: Allow charm to be deployed to a machine running
984 an unsupported series
985 :param int num_units: Number of units to deploy
986 :param str plan: Plan under which to deploy charm
987 :param dict resources: <resource name>:<file path> pairs
988 :param str series: Series on which to deploy
989 :param dict storage: Storage constraints TODO how do these look?
990 :param to: Placement directive as a string. For example:
992 '23' - place on machine 23
993 'lxd:7' - place in new lxd container on machine 7
994 '24/lxd/3' - place in container 3 on machine 24
996 If None, a new machine is provisioned.
1001 - support local resources
1006 k
: client
.Constraints(**v
)
1007 for k
, v
in storage
.items()
1011 entity_url
.startswith('local:') or
1012 os
.path
.isdir(entity_url
)
1015 entity_id
= entity_url
1017 entity
= await self
.charmstore
.entity(entity_url
)
1018 entity_id
= entity
['Id']
1020 client_facade
= client
.ClientFacade()
1021 client_facade
.connect(self
.connection
)
1023 is_bundle
= ((is_local
and
1024 (Path(entity_id
) / 'bundle.yaml').exists()) or
1025 (not is_local
and 'bundle/' in entity_id
))
1028 handler
= BundleHandler(self
)
1029 await handler
.fetch_plan(entity_id
)
1030 await handler
.execute_plan()
1031 extant_apps
= {app
for app
in self
.applications
}
1032 pending_apps
= set(handler
.applications
) - extant_apps
1034 # new apps will usually be in the model by now, but if some
1035 # haven't made it yet we'll need to wait on them to be added
1036 await asyncio
.gather(*[
1037 asyncio
.ensure_future(
1038 self
._wait
_for
_new
('application', app_name
),
1040 for app_name
in pending_apps
1042 return [app
for name
, app
in self
.applications
.items()
1043 if name
in handler
.applications
]
1046 if not application_name
:
1047 application_name
= entity
['Meta']['charm-metadata']['Name']
1049 series
= self
._get
_series
(entity_url
, entity
)
1052 await client_facade
.AddCharm(channel
, entity_id
)
1053 # XXX: we're dropping local resources here, but we don't
1054 # actually support them yet anyway
1055 resources
= await self
._add
_store
_resources
(application_name
,
1059 # We have a local charm dir that needs to be uploaded
1060 charm_dir
= os
.path
.abspath(
1061 os
.path
.expanduser(entity_id
))
1062 series
= series
or get_charm_series(charm_dir
)
1065 "Couldn't determine series for charm at {}. "
1066 "Pass a 'series' kwarg to Model.deploy().".format(
1068 entity_id
= await self
.add_local_charm_dir(charm_dir
, series
)
1069 return await self
._deploy
(
1070 charm_url
=entity_id
,
1071 application
=application_name
,
1073 config
=config
or {},
1074 constraints
=constraints
,
1075 endpoint_bindings
=bind
,
1076 resources
=resources
,
1079 num_units
=num_units
,
1080 placement
=parse_placement(to
)
1083 async def _add_store_resources(self
, application
, entity_url
, entity
=None):
1085 # avoid extra charm store call if one was already made
1086 entity
= await self
.charmstore
.entity(entity_url
)
1089 'description': resource
['Description'],
1090 'fingerprint': resource
['Fingerprint'],
1091 'name': resource
['Name'],
1092 'path': resource
['Path'],
1093 'revision': resource
['Revision'],
1094 'size': resource
['Size'],
1095 'type_': resource
['Type'],
1097 } for resource
in entity
['Meta']['resources']
1103 resources_facade
= client
.ResourcesFacade()
1104 resources_facade
.connect(self
.connection
)
1105 response
= await resources_facade
.AddPendingResources(
1106 tag
.application(application
),
1108 [client
.CharmResource(**resource
) for resource
in resources
])
1109 resource_map
= {resource
['name']: pid
1111 in zip(resources
, response
.pending_ids
)}
1114 async def _deploy(self
, charm_url
, application
, series
, config
,
1115 constraints
, endpoint_bindings
, resources
, storage
,
1116 channel
=None, num_units
=None, placement
=None):
1117 """Logic shared between `Model.deploy` and `BundleHandler.deploy`.
1119 log
.info('Deploying %s', charm_url
)
1121 # stringify all config values for API, and convert to YAML
1122 config
= {k
: str(v
) for k
, v
in config
.items()}
1123 config
= yaml
.dump({application
: config
},
1124 default_flow_style
=False)
1126 app_facade
= client
.ApplicationFacade()
1127 app_facade
.connect(self
.connection
)
1129 app
= client
.ApplicationDeploy(
1130 charm_url
=charm_url
,
1131 application
=application
,
1135 constraints
=parse_constraints(constraints
),
1136 endpoint_bindings
=endpoint_bindings
,
1137 num_units
=num_units
,
1138 resources
=resources
,
1143 result
= await app_facade
.Deploy([app
])
1144 errors
= [r
.error
.message
for r
in result
.results
if r
.error
]
1146 raise JujuError('\n'.join(errors
))
1147 return await self
._wait
_for
_new
('application', application
)
1149 async def destroy(self
):
1150 """Terminate all machines and resources for this model.
1151 Is already implemented in controller.py.
1153 raise NotImplementedError()
1155 async def destroy_unit(self
, *unit_names
):
1156 """Destroy units by name.
1159 app_facade
= client
.ApplicationFacade()
1160 app_facade
.connect(self
.connection
)
1163 'Destroying unit%s %s',
1164 's' if len(unit_names
) == 1 else '',
1165 ' '.join(unit_names
))
1167 return await app_facade
.DestroyUnits(list(unit_names
))
1168 destroy_units
= destroy_unit
1170 def get_backup(self
, archive_id
):
1171 """Download a backup archive file.
1173 :param str archive_id: The id of the archive to download
1174 :return str: Path to the archive file
1177 raise NotImplementedError()
1180 self
, num_controllers
=0, constraints
=None, series
=None, to
=None):
1181 """Ensure sufficient controllers exist to provide redundancy.
1183 :param int num_controllers: Number of controllers to make available
1184 :param constraints: Constraints to apply to the controller machines
1185 :type constraints: :class:`juju.Constraints`
1186 :param str series: Series of the controller machines
1187 :param list to: Placement directives for controller machines, e.g.::
1190 'lxc:7' - new lxc container on machine 7
1191 '24/lxc/3' - lxc container 3 or machine 24
1193 If None, a new machine is provisioned.
1196 raise NotImplementedError()
1198 def get_config(self
):
1199 """Return the configuration settings for this model.
1202 raise NotImplementedError()
1204 def get_constraints(self
):
1205 """Return the machine constraints for this model.
1208 raise NotImplementedError()
1210 async def grant(self
, username
, acl
='read'):
1211 """Grant a user access to this model.
1213 :param str username: Username
1214 :param str acl: Access control ('read' or 'write')
1217 model_facade
= client
.ModelManagerFacade()
1218 controller_conn
= await self
.connection
.controller()
1219 model_facade
.connect(controller_conn
)
1220 user
= tag
.user(username
)
1221 model
= tag
.model(self
.info
.uuid
)
1222 changes
= client
.ModifyModelAccess(acl
, 'grant', model
, user
)
1223 await self
.revoke(username
)
1224 return await model_facade
.ModifyModelAccess([changes
])
1226 def import_ssh_key(self
, identity
):
1227 """Add a public SSH key from a trusted indentity source to this model.
1229 :param str identity: User identity in the form <lp|gh>:<username>
1232 raise NotImplementedError()
1233 import_ssh_keys
= import_ssh_key
1235 async def get_machines(self
):
1236 """Return list of machines in this model.
1239 return list(self
.state
.machines
.keys())
1241 def get_shares(self
):
1242 """Return list of all users with access to this model.
1245 raise NotImplementedError()
1247 def get_spaces(self
):
1248 """Return list of all known spaces, including associated subnets.
1251 raise NotImplementedError()
1253 async def get_ssh_key(self
, raw_ssh
=False):
1254 """Return known SSH keys for this model.
1255 :param bool raw_ssh: if True, returns the raw ssh key, else it's fingerprint
1258 key_facade
= client
.KeyManagerFacade()
1259 key_facade
.connect(self
.connection
)
1260 entity
= {'tag': tag
.model(self
.info
.uuid
)}
1261 entities
= client
.Entities([entity
])
1262 return await key_facade
.ListKeys(entities
, raw_ssh
)
1263 get_ssh_keys
= get_ssh_key
1265 def get_storage(self
, filesystem
=False, volume
=False):
1266 """Return details of storage instances.
1268 :param bool filesystem: Include filesystem storage
1269 :param bool volume: Include volume storage
1272 raise NotImplementedError()
1274 def get_storage_pools(self
, names
=None, providers
=None):
1275 """Return list of storage pools.
1277 :param list names: Only include pools with these names
1278 :param list providers: Only include pools for these providers
1281 raise NotImplementedError()
1283 def get_subnets(self
, space
=None, zone
=None):
1284 """Return list of known subnets.
1286 :param str space: Only include subnets in this space
1287 :param str zone: Only include subnets in this zone
1290 raise NotImplementedError()
1292 def remove_blocks(self
):
1293 """Remove all blocks from this model.
1296 raise NotImplementedError()
1298 def remove_backup(self
, backup_id
):
1301 :param str backup_id: The id of the backup to remove
1304 raise NotImplementedError()
1306 def remove_cached_images(self
, arch
=None, kind
=None, series
=None):
1307 """Remove cached OS images.
1309 :param str arch: Architecture of the images to remove
1310 :param str kind: Image kind to remove, e.g. 'lxd'
1311 :param str series: Image series to remove, e.g. 'xenial'
1314 raise NotImplementedError()
1316 def remove_machine(self
, *machine_ids
):
1317 """Remove a machine from this model.
1319 :param str \*machine_ids: Ids of the machines to remove
1322 raise NotImplementedError()
1323 remove_machines
= remove_machine
1325 async def remove_ssh_key(self
, user
, key
):
1326 """Remove a public SSH key(s) from this model.
1328 :param str key: Full ssh key
1329 :param str user: Juju user to which the key is registered
1332 key_facade
= client
.KeyManagerFacade()
1333 key_facade
.connect(self
.connection
)
1334 key
= base64
.b64decode(bytes(key
.strip().split()[1].encode('ascii')))
1335 key
= hashlib
.md5(key
).hexdigest()
1336 key
= ':'.join(a
+b
for a
, b
in zip(key
[::2], key
[1::2]))
1337 await key_facade
.DeleteKeys([key
], user
)
1338 remove_ssh_keys
= remove_ssh_key
1341 self
, bootstrap
=False, constraints
=None, archive
=None,
1342 backup_id
=None, upload_tools
=False):
1343 """Restore a backup archive to a new controller.
1345 :param bool bootstrap: Bootstrap a new state machine
1346 :param constraints: Model constraints
1347 :type constraints: :class:`juju.Constraints`
1348 :param str archive: Path to backup archive to restore
1349 :param str backup_id: Id of backup to restore
1350 :param bool upload_tools: Upload tools if bootstrapping a new machine
1353 raise NotImplementedError()
1355 def retry_provisioning(self
):
1356 """Retry provisioning for failed machines.
1359 raise NotImplementedError()
1361 async def revoke(self
, username
):
1362 """Revoke a user's access to this model.
1364 :param str username: Username to revoke
1367 model_facade
= client
.ModelManagerFacade()
1368 controller_conn
= await self
.connection
.controller()
1369 model_facade
.connect(controller_conn
)
1370 user
= tag
.user(username
)
1371 model
= tag
.model(self
.info
.uuid
)
1372 changes
= client
.ModifyModelAccess('read', 'revoke', model
, user
)
1373 return await model_facade
.ModifyModelAccess([changes
])
1375 def run(self
, command
, timeout
=None):
1376 """Run command on all machines in this model.
1378 :param str command: The command to run
1379 :param int timeout: Time to wait before command is considered failed
1382 raise NotImplementedError()
1384 def set_config(self
, **config
):
1385 """Set configuration keys on this model.
1387 :param \*\*config: Config key/values
1390 raise NotImplementedError()
1392 def set_constraints(self
, constraints
):
1393 """Set machine constraints on this model.
1395 :param :class:`juju.Constraints` constraints: Machine constraints
1398 raise NotImplementedError()
1400 def get_action_output(self
, action_uuid
, wait
=-1):
1401 """Get the results of an action by ID.
1403 :param str action_uuid: Id of the action
1404 :param int wait: Time in seconds to wait for action to complete
1407 raise NotImplementedError()
1409 def get_action_status(self
, uuid_or_prefix
=None, name
=None):
1410 """Get the status of all actions, filtered by ID, ID prefix, or action name.
1412 :param str uuid_or_prefix: Filter by action uuid or prefix
1413 :param str name: Filter by action name
1416 raise NotImplementedError()
1418 def get_budget(self
, budget_name
):
1419 """Get budget usage info.
1421 :param str budget_name: Name of budget
1424 raise NotImplementedError()
1426 async def get_status(self
, filters
=None, utc
=False):
1427 """Return the status of the model.
1429 :param str filters: Optional list of applications, units, or machines
1430 to include, which can use wildcards ('*').
1431 :param bool utc: Display time as UTC in RFC3339 format
1434 client_facade
= client
.ClientFacade()
1435 client_facade
.connect(self
.connection
)
1436 return await client_facade
.FullStatus(filters
)
1439 self
, all_
=False, destination
=None, dry_run
=False, public
=False,
1440 source
=None, stream
=None, version
=None):
1441 """Copy Juju tools into this model.
1443 :param bool all_: Copy all versions, not just the latest
1444 :param str destination: Path to local destination directory
1445 :param bool dry_run: Don't do the actual copy
1446 :param bool public: Tools are for a public cloud, so generate mirrors
1448 :param str source: Path to local source directory
1449 :param str stream: Simplestreams stream for which to sync metadata
1450 :param str version: Copy a specific major.minor version
1453 raise NotImplementedError()
1455 def unblock(self
, *commands
):
1456 """Unblock an operation that would alter this model.
1458 :param str \*commands: The commands to unblock. Valid values are
1459 'all-changes', 'destroy-model', 'remove-object'
1462 raise NotImplementedError()
1464 def unset_config(self
, *keys
):
1465 """Unset configuration on this model.
1467 :param str \*keys: The keys to unset
1470 raise NotImplementedError()
1472 def upgrade_gui(self
):
1473 """Upgrade the Juju GUI for this model.
1476 raise NotImplementedError()
1479 self
, dry_run
=False, reset_previous_upgrade
=False,
1480 upload_tools
=False, version
=None):
1481 """Upgrade Juju on all machines in a model.
1483 :param bool dry_run: Don't do the actual upgrade
1484 :param bool reset_previous_upgrade: Clear the previous (incomplete)
1486 :param bool upload_tools: Upload local version of tools
1487 :param str version: Upgrade to a specific version
1490 raise NotImplementedError()
1492 def upload_backup(self
, archive_path
):
1493 """Store a backup archive remotely in Juju.
1495 :param str archive_path: Path to local archive
1498 raise NotImplementedError()
1501 def charmstore(self
):
1502 return self
._charmstore
1504 async def get_metrics(self
, *tags
):
1505 """Retrieve metrics.
1507 :param str \*tags: Tags of entities from which to retrieve metrics.
1508 No tags retrieves the metrics of all units in the model.
1509 :return: Dictionary of unit_name:metrics
1512 log
.debug("Retrieving metrics for %s",
1513 ', '.join(tags
) if tags
else "all units")
1515 metrics_facade
= client
.MetricsDebugFacade()
1516 metrics_facade
.connect(self
.connection
)
1518 entities
= [client
.Entity(tag
) for tag
in tags
]
1519 metrics_result
= await metrics_facade
.GetMetrics(entities
)
1521 metrics
= collections
.defaultdict(list)
1523 for entity_metrics
in metrics_result
.results
:
1524 error
= entity_metrics
.error
1526 if "is not a valid tag" in error
:
1527 raise ValueError(error
.message
)
1529 raise Exception(error
.message
)
1531 for metric
in entity_metrics
.metrics
:
1532 metrics
[metric
.unit
].append(vars(metric
))
1537 def get_charm_series(path
):
1538 """Inspects the charm directory at ``path`` and returns a default
1539 series from its metadata.yaml (the first item in the 'series' list).
1541 Returns None if no series can be determined.
1544 md
= Path(path
) / "metadata.yaml"
1547 data
= yaml
.load(md
.open())
1548 series
= data
.get('series')
1549 return series
[0] if series
else None
1552 class BundleHandler(object):
1554 Handle bundles by using the API to translate bundle YAML into a plan of
1555 steps and then dispatching each of those using the API.
1557 def __init__(self
, model
):
1559 self
.charmstore
= model
.charmstore
1561 self
.references
= {}
1562 self
._units
_by
_app
= {}
1563 for unit_name
, unit
in model
.units
.items():
1564 app_units
= self
._units
_by
_app
.setdefault(unit
.application
, [])
1565 app_units
.append(unit_name
)
1566 self
.client_facade
= client
.ClientFacade()
1567 self
.client_facade
.connect(model
.connection
)
1568 self
.app_facade
= client
.ApplicationFacade()
1569 self
.app_facade
.connect(model
.connection
)
1570 self
.ann_facade
= client
.AnnotationsFacade()
1571 self
.ann_facade
.connect(model
.connection
)
1573 async def _handle_local_charms(self
, bundle
):
1574 """Search for references to local charms (i.e. filesystem paths)
1575 in the bundle. Upload the local charms to the model, and replace
1576 the filesystem paths with appropriate 'local:' paths in the bundle.
1578 Return the modified bundle.
1580 :param dict bundle: Bundle dictionary
1581 :return: Modified bundle dictionary
1586 default_series
= bundle
.get('series')
1587 for app_name
in self
.applications
:
1588 app_dict
= bundle
['services'][app_name
]
1589 charm_dir
= os
.path
.abspath(os
.path
.expanduser(app_dict
['charm']))
1590 if not os
.path
.isdir(charm_dir
):
1593 app_dict
.get('series') or
1595 get_charm_series(charm_dir
)
1599 "Couldn't determine series for charm at {}. "
1600 "Add a 'series' key to the bundle.".format(charm_dir
))
1602 # Keep track of what we need to update. We keep a list of apps
1603 # that need to be updated, and a corresponding list of args
1604 # needed to update those apps.
1605 apps
.append(app_name
)
1606 args
.append((charm_dir
, series
))
1609 # If we have apps to update, spawn all the coroutines concurrently
1610 # and wait for them to finish.
1611 charm_urls
= await asyncio
.gather(*[
1612 self
.model
.add_local_charm_dir(*params
)
1614 ], loop
=self
.model
.loop
)
1615 # Update the 'charm:' entry for each app with the new 'local:' url.
1616 for app_name
, charm_url
in zip(apps
, charm_urls
):
1617 bundle
['services'][app_name
]['charm'] = charm_url
1621 async def fetch_plan(self
, entity_id
):
1622 is_local
= not entity_id
.startswith('cs:') and os
.path
.isdir(entity_id
)
1624 bundle_yaml
= (Path(entity_id
) / "bundle.yaml").read_text()
1626 bundle_yaml
= await self
.charmstore
.files(entity_id
,
1627 filename
='bundle.yaml',
1629 self
.bundle
= yaml
.safe_load(bundle_yaml
)
1630 self
.bundle
= await self
._handle
_local
_charms
(self
.bundle
)
1632 self
.plan
= await self
.client_facade
.GetBundleChanges(
1633 yaml
.dump(self
.bundle
))
1635 async def execute_plan(self
):
1636 for step
in self
.plan
.changes
:
1637 method
= getattr(self
, step
.method
)
1638 result
= await method(*step
.args
)
1639 self
.references
[step
.id_
] = result
1642 def applications(self
):
1643 return list(self
.bundle
['services'].keys())
1645 def resolve(self
, reference
):
1646 if reference
and reference
.startswith('$'):
1647 reference
= self
.references
[reference
[1:]]
1650 async def addCharm(self
, charm
, series
):
1652 :param charm string:
1653 Charm holds the URL of the charm to be added.
1655 :param series string:
1656 Series holds the series of the charm to be added
1657 if the charm default is not sufficient.
1659 # We don't add local charms because they've already been added
1660 # by self._handle_local_charms
1661 if charm
.startswith('local:'):
1664 entity_id
= await self
.charmstore
.entityId(charm
)
1665 log
.debug('Adding %s', entity_id
)
1666 await self
.client_facade
.AddCharm(None, entity_id
)
1669 async def addMachines(self
, params
=None):
1672 Dictionary specifying the machine to add. All keys are optional.
1675 series: string specifying the machine OS series.
1677 constraints: string holding machine constraints, if any. We'll
1678 parse this into the json friendly dict that the juju api
1681 container_type: string holding the type of the container (for
1682 instance ""lxd" or kvm"). It is not specified for top level
1685 parent_id: string holding a placeholder pointing to another
1686 machine change or to a unit change. This value is only
1687 specified in the case this machine is a container, in
1688 which case also ContainerType is set.
1691 params
= params
or {}
1694 params
= {normalize_key(k
): params
[k
] for k
in params
.keys()}
1696 # Fix up values, as necessary.
1697 if 'parent_id' in params
:
1698 params
['parent_id'] = self
.resolve(params
['parent_id'])
1700 params
['constraints'] = parse_constraints(
1701 params
.get('constraints'))
1702 params
['jobs'] = params
.get('jobs', ['JobHostUnits'])
1704 if params
.get('container_type') == 'lxc':
1705 log
.warning('Juju 2.0 does not support lxc containers. '
1706 'Converting containers to lxd.')
1707 params
['container_type'] = 'lxd'
1709 # Submit the request.
1710 params
= client
.AddMachineParams(**params
)
1711 results
= await self
.client_facade
.AddMachines([params
])
1712 error
= results
.machines
[0].error
1714 raise ValueError("Error adding machine: %s", error
.message
)
1715 machine
= results
.machines
[0].machine
1716 log
.debug('Added new machine %s', machine
)
1719 async def addRelation(self
, endpoint1
, endpoint2
):
1721 :param endpoint1 string:
1722 :param endpoint2 string:
1723 Endpoint1 and Endpoint2 hold relation endpoints in the
1724 "application:interface" form, where the application is always a
1725 placeholder pointing to an application change, and the interface is
1726 optional. Examples are "$deploy-42:web" or just "$deploy-42".
1728 endpoints
= [endpoint1
, endpoint2
]
1729 # resolve indirect references
1730 for i
in range(len(endpoints
)):
1731 parts
= endpoints
[i
].split(':')
1732 parts
[0] = self
.resolve(parts
[0])
1733 endpoints
[i
] = ':'.join(parts
)
1735 log
.info('Relating %s <-> %s', *endpoints
)
1736 return await self
.model
.add_relation(*endpoints
)
1738 async def deploy(self
, charm
, series
, application
, options
, constraints
,
1739 storage
, endpoint_bindings
, resources
):
1741 :param charm string:
1742 Charm holds the URL of the charm to be used to deploy this
1745 :param series string:
1746 Series holds the series of the application to be deployed
1747 if the charm default is not sufficient.
1749 :param application string:
1750 Application holds the application name.
1752 :param options map[string]interface{}:
1753 Options holds application options.
1755 :param constraints string:
1756 Constraints holds the optional application constraints.
1758 :param storage map[string]string:
1759 Storage holds the optional storage constraints.
1761 :param endpoint_bindings map[string]string:
1762 EndpointBindings holds the optional endpoint bindings
1764 :param resources map[string]int:
1765 Resources identifies the revision to use for each resource
1766 of the application's charm.
1768 # resolve indirect references
1769 charm
= self
.resolve(charm
)
1770 # the bundle plan doesn't actually do anything with resources, even
1771 # though it ostensibly gives us something (None) for that param
1772 if not charm
.startswith('local:'):
1773 resources
= await self
.model
._add
_store
_resources
(application
,
1775 await self
.model
._deploy
(
1777 application
=application
,
1780 constraints
=constraints
,
1781 endpoint_bindings
=endpoint_bindings
,
1782 resources
=resources
,
1787 async def addUnit(self
, application
, to
):
1789 :param application string:
1790 Application holds the application placeholder name for which a unit
1794 To holds the optional location where to add the unit, as a
1795 placeholder pointing to another unit change or to a machine change.
1797 application
= self
.resolve(application
)
1798 placement
= self
.resolve(to
)
1799 if self
._units
_by
_app
.get(application
):
1800 # enough units for this application already exist;
1801 # claim one, and carry on
1802 # NB: this should probably honor placement, but the juju client
1803 # doesn't, so we're not bothering, either
1804 unit_name
= self
._units
_by
_app
[application
].pop()
1805 log
.debug('Reusing unit %s for %s', unit_name
, application
)
1806 return self
.model
.units
[unit_name
]
1808 log
.debug('Adding new unit for %s%s', application
,
1809 ' to %s' % placement
if placement
else '')
1810 return await self
.model
.applications
[application
].add_unit(
1815 async def expose(self
, application
):
1817 :param application string:
1818 Application holds the placeholder name of the application that must
1821 application
= self
.resolve(application
)
1822 log
.info('Exposing %s', application
)
1823 return await self
.model
.applications
[application
].expose()
1825 async def setAnnotations(self
, id_
, entity_type
, annotations
):
1828 Id is the placeholder for the application or machine change
1829 corresponding to the entity to be annotated.
1831 :param entity_type EntityType:
1832 EntityType holds the type of the entity, "application" or
1835 :param annotations map[string]string:
1836 Annotations holds the annotations as key/value pairs.
1838 entity_id
= self
.resolve(id_
)
1840 entity
= self
.model
.state
.get_entity(entity_type
, entity_id
)
1842 entity
= await self
.model
._wait
_for
_new
(entity_type
, entity_id
)
1843 return await entity
.set_annotations(annotations
)
1846 class CharmStore(object):
1848 Async wrapper around theblues.charmstore.CharmStore
1850 def __init__(self
, loop
):
1852 self
._cs
= theblues
.charmstore
.CharmStore(timeout
=5)
1854 def __getattr__(self
, name
):
1856 Wrap method calls in coroutines that use run_in_executor to make them
1859 attr
= getattr(self
._cs
, name
)
1860 if not callable(attr
):
1861 wrapper
= partial(getattr, self
._cs
, name
)
1862 setattr(self
, name
, wrapper
)
1864 async def coro(*args
, **kwargs
):
1865 method
= partial(attr
, *args
, **kwargs
)
1866 for attempt
in range(1, 4):
1868 return await self
.loop
.run_in_executor(None, method
)
1869 except theblues
.errors
.ServerError
:
1872 await asyncio
.sleep(1, loop
=self
.loop
)
1873 setattr(self
, name
, coro
)
1878 class CharmArchiveGenerator(object):
1879 def __init__(self
, path
):
1880 self
.path
= os
.path
.abspath(os
.path
.expanduser(path
))
1882 def make_archive(self
, path
):
1883 """Create archive of directory and write to ``path``.
1885 :param path: Path to archive
1889 * build/\* - This is used for packing the charm itself and any
1891 * \*/.\* - Hidden files are all ignored for now. This will most
1892 likely be changed into a specific ignore list
1896 zf
= zipfile
.ZipFile(path
, 'w', zipfile
.ZIP_DEFLATED
)
1897 for dirpath
, dirnames
, filenames
in os
.walk(self
.path
):
1898 relative_path
= dirpath
[len(self
.path
) + 1:]
1899 if relative_path
and not self
._ignore
(relative_path
):
1900 zf
.write(dirpath
, relative_path
)
1901 for name
in filenames
:
1902 archive_name
= os
.path
.join(relative_path
, name
)
1903 if not self
._ignore
(archive_name
):
1904 real_path
= os
.path
.join(dirpath
, name
)
1905 self
._check
_type
(real_path
)
1906 if os
.path
.islink(real_path
):
1907 self
._check
_link
(real_path
)
1908 self
._write
_symlink
(
1909 zf
, os
.readlink(real_path
), archive_name
)
1911 zf
.write(real_path
, archive_name
)
1915 def _check_type(self
, path
):
1919 if stat
.S_ISDIR(s
.st_mode
) or stat
.S_ISREG(s
.st_mode
):
1921 raise ValueError("Invalid Charm at % %s" % (
1922 path
, "Invalid file type for a charm"))
1924 def _check_link(self
, path
):
1925 link_path
= os
.readlink(path
)
1926 if link_path
[0] == "/":
1928 "Invalid Charm at %s: %s" % (
1929 path
, "Absolute links are invalid"))
1930 path_dir
= os
.path
.dirname(path
)
1931 link_path
= os
.path
.join(path_dir
, link_path
)
1932 if not link_path
.startswith(os
.path
.abspath(self
.path
)):
1934 "Invalid charm at %s %s" % (
1935 path
, "Only internal symlinks are allowed"))
1937 def _write_symlink(self
, zf
, link_target
, link_path
):
1938 """Package symlinks with appropriate zipfile metadata."""
1939 info
= zipfile
.ZipInfo()
1940 info
.filename
= link_path
1941 info
.create_system
= 3
1942 # Magic code for symlinks / py2/3 compat
1943 # 27166663808 = (stat.S_IFLNK | 0755) << 16
1944 info
.external_attr
= 2716663808
1945 zf
.writestr(info
, link_target
)
1947 def _ignore(self
, path
):
1948 if path
== "build" or path
.startswith("build/"):
1950 if path
.startswith('.'):