6 from concurrent
.futures
import CancelledError
7 from functools
import partial
10 from theblues
import charmstore
12 from .client
import client
13 from .client
import watcher
14 from .client
import connection
15 from .delta
import get_entity_delta
16 from .delta
import get_entity_class
17 from .exceptions
import DeadEntityException
18 from .errors
import JujuAPIError
20 log
= logging
.getLogger(__name__
)
23 class _Observer(object):
24 """Wrapper around an observer callable.
26 This wrapper allows filter criteria to be associated with the
27 callable so that it's only called for changes that meet the criteria.
30 def __init__(self
, callable_
, entity_type
, action
, entity_id
, predicate
):
31 self
.callable_
= callable_
32 self
.entity_type
= entity_type
34 self
.entity_id
= entity_id
35 self
.predicate
= predicate
37 self
.entity_id
= str(self
.entity_id
)
38 if not self
.entity_id
.startswith('^'):
39 self
.entity_id
= '^' + self
.entity_id
40 if not self
.entity_id
.endswith('$'):
43 async def __call__(self
, delta
, old
, new
, model
):
44 await self
.callable_(delta
, old
, new
, model
)
46 def cares_about(self
, delta
):
47 """Return True if this observer "cares about" (i.e. wants to be
48 called) for a this delta.
51 if (self
.entity_id
and delta
.get_id() and
52 not re
.match(self
.entity_id
, str(delta
.get_id()))):
55 if self
.entity_type
and self
.entity_type
!= delta
.entity
:
58 if self
.action
and self
.action
!= delta
.type:
61 if self
.predicate
and not self
.predicate(delta
):
67 class ModelObserver(object):
68 async def __call__(self
, delta
, old
, new
, model
):
69 handler_name
= 'on_{}_{}'.format(delta
.entity
, delta
.type)
70 method
= getattr(self
, handler_name
, self
.on_change
)
71 await method(delta
, old
, new
, model
)
73 async def on_change(self
, delta
, old
, new
, model
):
77 class ModelState(object):
78 """Holds the state of the model, including the delta history of all
79 entities in the model.
82 def __init__(self
, model
):
86 def _live_entity_map(self
, entity_type
):
87 """Return an id:Entity map of all the living entities of
92 entity_id
: self
.get_entity(entity_type
, entity_id
)
93 for entity_id
, history
in self
.state
.get(entity_type
, {}).items()
94 if history
[-1] is not None
98 def applications(self
):
99 """Return a map of application-name:Application for all applications
100 currently in the model.
103 return self
._live
_entity
_map
('application')
107 """Return a map of machine-id:Machine for all machines currently in
111 return self
._live
_entity
_map
('machine')
115 """Return a map of unit-id:Unit for all units currently in
119 return self
._live
_entity
_map
('unit')
121 def entity_history(self
, entity_type
, entity_id
):
122 """Return the history deque for an entity.
125 return self
.state
[entity_type
][entity_id
]
127 def entity_data(self
, entity_type
, entity_id
, history_index
):
128 """Return the data dict for an entity at a specific index of its
132 return self
.entity_history(entity_type
, entity_id
)[history_index
]
134 def apply_delta(self
, delta
):
135 """Apply delta to our state and return a copy of the
136 affected object as it was before and after the update, e.g.:
138 old_obj, new_obj = self.apply_delta(delta)
140 old_obj may be None if the delta is for the creation of a new object,
141 e.g. a new application or unit is deployed.
143 new_obj will never be None, but may be dead (new_obj.dead == True)
144 if the object was deleted as a result of the delta being applied.
149 .setdefault(delta
.entity
, {})
150 .setdefault(delta
.get_id(), collections
.deque())
153 history
.append(delta
.data
)
154 if delta
.type == 'remove':
157 entity
= self
.get_entity(delta
.entity
, delta
.get_id())
158 return entity
.previous(), entity
161 self
, entity_type
, entity_id
, history_index
=-1, connected
=True):
162 """Return an object instance representing the entity created or
168 'Getting %s:%s at index %s',
169 entity_type, entity_id, history_index)
172 if history_index
< 0 and history_index
!= -1:
173 history_index
+= len(self
.entity_history(entity_type
, entity_id
))
174 if history_index
< 0:
178 self
.entity_data(entity_type
, entity_id
, history_index
)
182 entity_class
= get_entity_class(entity_type
)
184 entity_id
, self
.model
, history_index
=history_index
,
188 class ModelEntity(object):
189 """An object in the Model tree"""
191 def __init__(self
, entity_id
, model
, history_index
=-1, connected
=True):
192 """Initialize a new entity
194 :param entity_id str: The unique id of the object in the model
195 :param model: The model instance in whose object tree this
197 :history_index int: The index of this object's state in the model's
198 history deque for this entity
199 :connected bool: Flag indicating whether this object gets live updates
203 self
.entity_id
= entity_id
205 self
._history
_index
= history_index
206 self
.connected
= connected
207 self
.connection
= model
.connection
209 def __getattr__(self
, name
):
210 """Fetch object attributes from the underlying data dict held in the
214 if self
.data
is None:
215 raise DeadEntityException(
216 "Entity {}:{} is dead - its attributes can no longer be "
217 "accessed. Use the .previous() method on this object to get "
218 "a copy of the object at its previous state.".format(
219 self
.entity_type
, self
.entity_id
))
220 return self
.data
[name
]
223 return bool(self
.data
)
225 def on_change(self
, callable_
):
226 """Add a change observer to this entity.
229 self
.model
.add_observer(
230 callable_
, self
.entity_type
, 'change', self
.entity_id
)
232 def on_remove(self
, callable_
):
233 """Add a remove observer to this entity.
236 self
.model
.add_observer(
237 callable_
, self
.entity_type
, 'remove', self
.entity_id
)
240 def entity_type(self
):
241 """A string identifying the entity type of this object, e.g.
242 'application' or 'unit', etc.
245 return self
.__class
__.__name
__.lower()
249 """Return True if this object represents the current state of the
250 entity in the underlying model.
252 This will be True except when the object represents an entity at a
253 non-latest state in history, e.g. if the object was obtained by calling
254 .previous() on another object.
257 return self
._history
_index
== -1
261 """Returns True if this entity no longer exists in the underlying
267 self
.model
.state
.entity_data(
268 self
.entity_type
, self
.entity_id
, -1) is None
273 """Returns True if this entity still exists in the underlying
281 """The data dictionary for this entity.
284 return self
.model
.state
.entity_data(
285 self
.entity_type
, self
.entity_id
, self
._history
_index
)
288 """Return a copy of this object as was at its previous state in
291 Returns None if this object is new (and therefore has no history).
293 The returned object is always "disconnected", i.e. does not receive
297 return self
.model
.state
.get_entity(
298 self
.entity_type
, self
.entity_id
, self
._history
_index
- 1,
302 """Return a copy of this object at its next state in
305 Returns None if this object is already the latest.
307 The returned object is "disconnected", i.e. does not receive
308 live updates, unless it is current (latest).
311 if self
._history
_index
== -1:
314 new_index
= self
._history
_index
+ 1
316 new_index
== len(self
.model
.state
.entity_history(
317 self
.entity_type
, self
.entity_id
)) - 1
319 return self
.model
.state
.get_entity(
320 self
.entity_type
, self
.entity_id
, self
._history
_index
- 1,
324 """Return a copy of this object at its current state in the model.
326 Returns self if this object is already the latest.
328 The returned object is always "connected", i.e. receives
329 live updates from the model.
332 if self
._history
_index
== -1:
335 return self
.model
.state
.get_entity(self
.entity_type
, self
.entity_id
)
339 def __init__(self
, loop
=None):
340 """Instantiate a new connected Model.
342 :param loop: an asyncio event loop
345 self
.loop
= loop
or asyncio
.get_event_loop()
346 self
.connection
= None
347 self
.observers
= weakref
.WeakValueDictionary()
348 self
.state
= ModelState(self
)
349 self
._watcher
_task
= None
350 self
._watch
_shutdown
= asyncio
.Event(loop
=loop
)
351 self
._watch
_received
= asyncio
.Event(loop
=loop
)
352 self
._charmstore
= CharmStore(self
.loop
)
354 async def connect_current(self
):
355 """Connect to the current Juju model.
358 self
.connection
= await connection
.Connection
.connect_current()
360 await self
._watch
_received
.wait()
362 async def disconnect(self
):
363 """Shut down the watcher task and close websockets.
366 self
._stop
_watching
()
367 if self
.connection
and self
.connection
.is_open
:
368 await self
._watch
_shutdown
.wait()
369 log
.debug('Closing model connection')
370 await self
.connection
.close()
371 self
.connection
= None
373 def all_units_idle(self
):
374 """Return True if all units are idle.
377 for unit
in self
.units
.values():
378 unit_status
= unit
.data
['agent-status']['current']
379 if unit_status
!= 'idle':
383 async def reset(self
, force
=False):
384 """Reset the model to a clean state.
386 :param bool force: Force-terminate machines.
388 This returns only after the model has reached a clean state. "Clean"
389 means no applications or machines exist in the model.
392 log
.debug('Resetting model')
393 for app
in self
.applications
.values():
395 for machine
in self
.machines
.values():
396 await machine
.destroy(force
=force
)
397 await self
.block_until(
398 lambda: len(self
.machines
) == 0
401 async def block_until(self
, *conditions
, timeout
=None):
402 """Return only after all conditions are true.
406 while not all(c() for c
in conditions
):
407 await asyncio
.sleep(0)
408 await asyncio
.wait_for(_block(), timeout
)
411 def applications(self
):
412 """Return a map of application-name:Application for all applications
413 currently in the model.
416 return self
.state
.applications
420 """Return a map of machine-id:Machine for all machines currently in
424 return self
.state
.machines
428 """Return a map of unit-id:Unit for all units currently in
432 return self
.state
.units
435 self
, callable_
, entity_type
=None, action
=None, entity_id
=None,
437 """Register an "on-model-change" callback
439 Once the model is connected, ``callable_``
440 will be called each time the model changes. callable_ should
441 be Awaitable and accept the following positional arguments:
443 delta - An instance of :class:`juju.delta.EntityDelta`
444 containing the raw delta data recv'd from the Juju
447 old_obj - If the delta modifies an existing object in the model,
448 old_obj will be a copy of that object, as it was before the
449 delta was applied. Will be None if the delta creates a new
452 new_obj - A copy of the new or updated object, after the delta
453 is applied. Will be None if the delta removes an entity
456 model - The :class:`Model` itself.
458 Events for which ``callable_`` is called can be specified by passing
459 entity_type, action, and/or id_ filter criteria, e.g.:
462 myfunc, entity_type='application', action='add', id_='ubuntu')
464 For more complex filtering conditions, pass a predicate function. It
465 will be called with a delta as its only argument. If the predicate
466 function returns True, the callable_ will be called.
469 observer
= _Observer(
470 callable_
, entity_type
, action
, entity_id
, predicate
)
471 self
.observers
[observer
] = callable_
474 """Start an asynchronous watch against this model.
476 See :meth:`add_observer` to register an onchange callback.
479 async def _start_watch():
480 self
._watch
_shutdown
.clear()
482 allwatcher
= watcher
.AllWatcher()
483 self
._watch
_conn
= await self
.connection
.clone()
484 allwatcher
.connect(self
._watch
_conn
)
486 results
= await allwatcher
.Next()
487 for delta
in results
.deltas
:
488 delta
= get_entity_delta(delta
)
489 old_obj
, new_obj
= self
.state
.apply_delta(delta
)
490 # XXX: Might not want to shield at this level
491 # We are shielding because when the watcher is
492 # canceled (on disconnect()), we don't want all of
493 # its children (every observer callback) to be
494 # canceled with it. So we shield them. But this means
495 # they can *never* be canceled.
496 await asyncio
.shield(
497 self
._notify
_observers
(delta
, old_obj
, new_obj
))
498 self
._watch
_received
.set()
499 except CancelledError
:
500 log
.debug('Closing watcher connection')
501 await self
._watch
_conn
.close()
502 self
._watch
_shutdown
.set()
503 self
._watch
_conn
= None
505 log
.debug('Starting watcher task')
506 self
._watcher
_task
= self
.loop
.create_task(_start_watch())
508 def _stop_watching(self
):
509 """Stop the asynchronous watch against this model.
512 log
.debug('Stopping watcher task')
513 if self
._watcher
_task
:
514 self
._watcher
_task
.cancel()
516 async def _notify_observers(self
, delta
, old_obj
, new_obj
):
517 """Call observing callbacks, notifying them of a change in model state
519 :param delta: The raw change from the watcher
520 (:class:`juju.client.overrides.Delta`)
521 :param old_obj: The object in the model that this delta updates.
523 :param new_obj: The object in the model that is created or updated
524 by applying this delta.
527 if new_obj
and not old_obj
:
531 'Model changed: %s %s %s',
532 delta
.entity
, delta
.type, delta
.get_id())
534 for o
in self
.observers
:
535 if o
.cares_about(delta
):
536 asyncio
.ensure_future(o(delta
, old_obj
, new_obj
, self
))
538 async def _wait_for_new(self
, entity_type
, entity_id
, predicate
=None):
539 """Wait for a new object to appear in the Model and return it.
541 Waits for an object of type ``entity_type`` with id ``entity_id``.
543 This coroutine blocks until the new object appears in the model.
546 entity_added
= asyncio
.Queue(loop
=self
.loop
)
548 async def callback(delta
, old
, new
, model
):
549 await entity_added
.put(delta
.get_id())
551 self
.add_observer(callback
, entity_type
, 'add', entity_id
, predicate
)
552 entity_id
= await entity_added
.get()
553 return self
.state
._live
_entity
_map
(entity_type
)[entity_id
]
556 self
, spec
=None, constraints
=None, disks
=None, series
=None,
558 """Start a new, empty machine and optionally a container, or add a
559 container to a machine.
561 :param str spec: Machine specification
564 (None) - starts a new machine
565 'lxc' - starts a new machine with on lxc container
566 'lxc:4' - starts a new lxc container on machine 4
567 'ssh:user@10.10.0.3' - manually provisions a machine with ssh
568 'zone=us-east-1a' - starts a machine in zone us-east-1s on AWS
569 'maas2.name' - acquire machine maas2.name on MAAS
570 :param constraints: Machine constraints
571 :type constraints: :class:`juju.Constraints`
572 :param list disks: List of disk :class:`constraints <juju.Constraints>`
573 :param str series: Series
574 :param int count: Number of machines to deploy
576 Supported container types are: lxc, lxd, kvm
578 When deploying a container to an existing machine, constraints cannot
583 add_machines
= add_machine
585 async def add_relation(self
, relation1
, relation2
):
586 """Add a relation between two applications.
588 :param str relation1: '<application>[:<relation_name>]'
589 :param str relation2: '<application>[:<relation_name>]'
592 app_facade
= client
.ApplicationFacade()
593 app_facade
.connect(self
.connection
)
596 'Adding relation %s <-> %s', relation1
, relation2
)
599 result
= await app_facade
.AddRelation([relation1
, relation2
])
600 except JujuAPIError
as e
:
601 if 'relation already exists' not in e
.message
:
604 'Relation %s <-> %s already exists', relation1
, relation2
)
605 # TODO: if relation already exists we should return the
606 # Relation ModelEntity here
609 def predicate(delta
):
611 for endpoint
in delta
.data
['endpoints']:
612 endpoints
[endpoint
['application-name']] = endpoint
['relation']
613 return endpoints
== result
.endpoints
615 return await self
._wait
_for
_new
('relation', None, predicate
)
617 def add_space(self
, name
, *cidrs
):
618 """Add a new network space.
620 Adds a new space with the given name and associates the given
621 (optional) list of existing subnet CIDRs with it.
623 :param str name: Name of the space
624 :param \*cidrs: Optional list of existing subnet CIDRs
629 def add_ssh_key(self
, key
):
630 """Add a public SSH key to this model.
632 :param str key: The public ssh key
636 add_ssh_keys
= add_ssh_key
638 def add_subnet(self
, cidr_or_id
, space
, *zones
):
639 """Add an existing subnet to this model.
641 :param str cidr_or_id: CIDR or provider ID of the existing subnet
642 :param str space: Network space with which to associate
643 :param str \*zones: Zone(s) in which the subnet resides
648 def get_backups(self
):
649 """Retrieve metadata for backups in this model.
654 def block(self
, *commands
):
655 """Add a new block to this model.
657 :param str \*commands: The commands to block. Valid values are
658 'all-changes', 'destroy-model', 'remove-object'
663 def get_blocks(self
):
664 """List blocks for this model.
669 def get_cached_images(self
, arch
=None, kind
=None, series
=None):
670 """Return a list of cached OS images.
672 :param str arch: Filter by image architecture
673 :param str kind: Filter by image kind, e.g. 'lxd'
674 :param str series: Filter by image series, e.g. 'xenial'
679 def create_backup(self
, note
=None, no_download
=False):
680 """Create a backup of this model.
682 :param str note: A note to store with the backup
683 :param bool no_download: Do not download the backup archive
684 :return str: Path to downloaded archive
689 def create_storage_pool(self
, name
, provider_type
, **pool_config
):
690 """Create or define a storage pool.
692 :param str name: Name to give the storage pool
693 :param str provider_type: Pool provider type
694 :param \*\*pool_config: key/value pool configuration pairs
700 self
, no_tail
=False, exclude_module
=None, include_module
=None,
701 include
=None, level
=None, limit
=0, lines
=10, replay
=False,
703 """Get log messages for this model.
705 :param bool no_tail: Stop after returning existing log messages
706 :param list exclude_module: Do not show log messages for these logging
708 :param list include_module: Only show log messages for these logging
710 :param list include: Only show log messages for these entities
711 :param str level: Log level to show, valid options are 'TRACE',
712 'DEBUG', 'INFO', 'WARNING', 'ERROR,
713 :param int limit: Return this many of the most recent (possibly
714 filtered) lines are shown
715 :param int lines: Yield this many of the most recent lines, and keep
717 :param bool replay: Yield the entire log, and keep yielding
718 :param list exclude: Do not show log messages for these entities
724 self
, entity_url
, service_name
=None, bind
=None, budget
=None,
725 channel
=None, config
=None, constraints
=None, force
=False,
726 num_units
=1, plan
=None, resources
=None, series
=None, storage
=None,
728 """Deploy a new service or bundle.
730 :param str entity_url: Charm or bundle url
731 :param str service_name: Name to give the service
732 :param dict bind: <charm endpoint>:<network space> pairs
733 :param dict budget: <budget name>:<limit> pairs
734 :param str channel: Charm store channel from which to retrieve
735 the charm or bundle, e.g. 'development'
736 :param dict config: Charm configuration dictionary
737 :param constraints: Service constraints
738 :type constraints: :class:`juju.Constraints`
739 :param bool force: Allow charm to be deployed to a machine running
740 an unsupported series
741 :param int num_units: Number of units to deploy
742 :param str plan: Plan under which to deploy charm
743 :param dict resources: <resource name>:<file path> pairs
744 :param str series: Series on which to deploy
745 :param dict storage: Storage constraints TODO how do these look?
746 :param str to: Placement directive, e.g.::
749 'lxc:7' - new lxc container on machine 7
750 '24/lxc/3' - lxc container 3 or machine 24
752 If None, a new machine is provisioned.
757 - service_name is required; fill this in automatically if not
759 - series is required; how do we pick a default?
763 constraints
= client
.Value(**constraints
)
767 client
.Placement(**p
) for p
in to
774 k
: client
.Constraints(**v
)
775 for k
, v
in storage
.items()
778 entity_id
= await self
.charmstore
.entityId(entity_url
)
780 app_facade
= client
.ApplicationFacade()
781 client_facade
= client
.ClientFacade()
782 app_facade
.connect(self
.connection
)
783 client_facade
.connect(self
.connection
)
785 if 'bundle/' in entity_id
:
786 handler
= BundleHandler(self
)
787 await handler
.fetch_plan(entity_id
)
788 await handler
.execute_plan()
789 extant_apps
= {app
for app
in self
.applications
}
790 pending_apps
= set(handler
.applications
) - extant_apps
792 # new apps will usually be in the model by now, but if some
793 # haven't made it yet we'll need to wait on them to be added
794 await asyncio
.wait([self
._wait
_for
_new
('application', app_name
)
795 for app_name
in pending_apps
])
796 return [app
for name
, app
in self
.applications
.items()
797 if name
in handler
.applications
]
800 'Deploying %s', entity_id
)
802 await client_facade
.AddCharm(channel
, entity_id
)
803 app
= client
.ApplicationDeploy(
804 application
=service_name
,
808 constraints
=constraints
,
809 endpoint_bindings
=bind
,
817 await app_facade
.Deploy([app
])
818 return [await self
._wait
_for
_new
('application', service_name
)]
821 """Terminate all machines and resources for this model.
826 def get_backup(self
, archive_id
):
827 """Download a backup archive file.
829 :param str archive_id: The id of the archive to download
830 :return str: Path to the archive file
836 self
, num_controllers
=0, constraints
=None, series
=None, to
=None):
837 """Ensure sufficient controllers exist to provide redundancy.
839 :param int num_controllers: Number of controllers to make available
840 :param constraints: Constraints to apply to the controller machines
841 :type constraints: :class:`juju.Constraints`
842 :param str series: Series of the controller machines
843 :param list to: Placement directives for controller machines, e.g.::
846 'lxc:7' - new lxc container on machine 7
847 '24/lxc/3' - lxc container 3 or machine 24
849 If None, a new machine is provisioned.
854 def get_config(self
):
855 """Return the configuration settings for this model.
860 def get_constraints(self
):
861 """Return the machine constraints for this model.
866 def grant(self
, username
, acl
='read'):
867 """Grant a user access to this model.
869 :param str username: Username
870 :param str acl: Access control ('read' or 'write')
875 def import_ssh_key(self
, identity
):
876 """Add a public SSH key from a trusted indentity source to this model.
878 :param str identity: User identity in the form <lp|gh>:<username>
882 import_ssh_keys
= import_ssh_key
884 def get_machines(self
, machine
, utc
=False):
885 """Return list of machines in this model.
887 :param str machine: Machine id, e.g. '0'
888 :param bool utc: Display time as UTC in RFC3339 format
893 def get_shares(self
):
894 """Return list of all users with access to this model.
899 def get_spaces(self
):
900 """Return list of all known spaces, including associated subnets.
905 def get_ssh_key(self
):
906 """Return known SSH keys for this model.
910 get_ssh_keys
= get_ssh_key
912 def get_storage(self
, filesystem
=False, volume
=False):
913 """Return details of storage instances.
915 :param bool filesystem: Include filesystem storage
916 :param bool volume: Include volume storage
921 def get_storage_pools(self
, names
=None, providers
=None):
922 """Return list of storage pools.
924 :param list names: Only include pools with these names
925 :param list providers: Only include pools for these providers
930 def get_subnets(self
, space
=None, zone
=None):
931 """Return list of known subnets.
933 :param str space: Only include subnets in this space
934 :param str zone: Only include subnets in this zone
939 def remove_blocks(self
):
940 """Remove all blocks from this model.
945 def remove_backup(self
, backup_id
):
948 :param str backup_id: The id of the backup to remove
953 def remove_cached_images(self
, arch
=None, kind
=None, series
=None):
954 """Remove cached OS images.
956 :param str arch: Architecture of the images to remove
957 :param str kind: Image kind to remove, e.g. 'lxd'
958 :param str series: Image series to remove, e.g. 'xenial'
963 def remove_machine(self
, *machine_ids
):
964 """Remove a machine from this model.
966 :param str \*machine_ids: Ids of the machines to remove
970 remove_machines
= remove_machine
972 def remove_ssh_key(self
, *keys
):
973 """Remove a public SSH key(s) from this model.
975 :param str \*keys: Keys to remove
979 remove_ssh_keys
= remove_ssh_key
982 self
, bootstrap
=False, constraints
=None, archive
=None,
983 backup_id
=None, upload_tools
=False):
984 """Restore a backup archive to a new controller.
986 :param bool bootstrap: Bootstrap a new state machine
987 :param constraints: Model constraints
988 :type constraints: :class:`juju.Constraints`
989 :param str archive: Path to backup archive to restore
990 :param str backup_id: Id of backup to restore
991 :param bool upload_tools: Upload tools if bootstrapping a new machine
996 def retry_provisioning(self
):
997 """Retry provisioning for failed machines.
1002 def revoke(self
, username
, acl
='read'):
1003 """Revoke a user's access to this model.
1005 :param str username: Username to revoke
1006 :param str acl: Access control ('read' or 'write')
1011 def run(self
, command
, timeout
=None):
1012 """Run command on all machines in this model.
1014 :param str command: The command to run
1015 :param int timeout: Time to wait before command is considered failed
1020 def set_config(self
, **config
):
1021 """Set configuration keys on this model.
1023 :param \*\*config: Config key/values
1028 def set_constraints(self
, constraints
):
1029 """Set machine constraints on this model.
1031 :param :class:`juju.Constraints` constraints: Machine constraints
1036 def get_action_output(self
, action_uuid
, wait
=-1):
1037 """Get the results of an action by ID.
1039 :param str action_uuid: Id of the action
1040 :param int wait: Time in seconds to wait for action to complete
1045 def get_action_status(self
, uuid_or_prefix
=None, name
=None):
1046 """Get the status of all actions, filtered by ID, ID prefix, or action name.
1048 :param str uuid_or_prefix: Filter by action uuid or prefix
1049 :param str name: Filter by action name
1054 def get_budget(self
, budget_name
):
1055 """Get budget usage info.
1057 :param str budget_name: Name of budget
1062 def get_status(self
, filter_
=None, utc
=False):
1063 """Return the status of the model.
1065 :param str filter_: Service or unit name or wildcard ('*')
1066 :param bool utc: Display time as UTC in RFC3339 format
1073 self
, all_
=False, destination
=None, dry_run
=False, public
=False,
1074 source
=None, stream
=None, version
=None):
1075 """Copy Juju tools into this model.
1077 :param bool all_: Copy all versions, not just the latest
1078 :param str destination: Path to local destination directory
1079 :param bool dry_run: Don't do the actual copy
1080 :param bool public: Tools are for a public cloud, so generate mirrors
1082 :param str source: Path to local source directory
1083 :param str stream: Simplestreams stream for which to sync metadata
1084 :param str version: Copy a specific major.minor version
1089 def unblock(self
, *commands
):
1090 """Unblock an operation that would alter this model.
1092 :param str \*commands: The commands to unblock. Valid values are
1093 'all-changes', 'destroy-model', 'remove-object'
1098 def unset_config(self
, *keys
):
1099 """Unset configuration on this model.
1101 :param str \*keys: The keys to unset
1106 def upgrade_gui(self
):
1107 """Upgrade the Juju GUI for this model.
1113 self
, dry_run
=False, reset_previous_upgrade
=False,
1114 upload_tools
=False, version
=None):
1115 """Upgrade Juju on all machines in a model.
1117 :param bool dry_run: Don't do the actual upgrade
1118 :param bool reset_previous_upgrade: Clear the previous (incomplete)
1120 :param bool upload_tools: Upload local version of tools
1121 :param str version: Upgrade to a specific version
1126 def upload_backup(self
, archive_path
):
1127 """Store a backup archive remotely in Juju.
1129 :param str archive_path: Path to local archive
1135 def charmstore(self
):
1136 return self
._charmstore
1139 class BundleHandler(object):
1141 Handle bundles by using the API to translate bundle YAML into a plan of
1142 steps and then dispatching each of those using the API.
1144 def __init__(self
, model
):
1146 self
.charmstore
= model
.charmstore
1148 self
.references
= {}
1149 self
._units
_by
_app
= {}
1150 for unit_name
, unit
in model
.units
.items():
1151 app_units
= self
._units
_by
_app
.setdefault(unit
.application
, [])
1152 app_units
.append(unit_name
)
1153 self
.client_facade
= client
.ClientFacade()
1154 self
.client_facade
.connect(model
.connection
)
1155 self
.app_facade
= client
.ApplicationFacade()
1156 self
.app_facade
.connect(model
.connection
)
1157 self
.ann_facade
= client
.AnnotationsFacade()
1158 self
.ann_facade
.connect(model
.connection
)
1160 async def fetch_plan(self
, entity_id
):
1161 bundle_yaml
= await self
.charmstore
.files(entity_id
,
1162 filename
='bundle.yaml',
1164 self
.bundle
= yaml
.safe_load(bundle_yaml
)
1165 self
.plan
= await self
.client_facade
.GetBundleChanges(bundle_yaml
)
1167 async def execute_plan(self
):
1168 for step
in self
.plan
.changes
:
1169 method
= getattr(self
, step
.method
)
1170 result
= await method(*step
.args
)
1171 self
.references
[step
.id_
] = result
1174 def applications(self
):
1175 return list(self
.bundle
['services'].keys())
1177 def resolve(self
, reference
):
1178 if reference
and reference
.startswith('$'):
1179 reference
= self
.references
[reference
[1:]]
1182 async def addCharm(self
, charm
, series
):
1184 :param charm string:
1185 Charm holds the URL of the charm to be added.
1187 :param series string:
1188 Series holds the series of the charm to be added
1189 if the charm default is not sufficient.
1191 entity_id
= await self
.charmstore
.entityId(charm
)
1192 log
.debug('Adding %s', entity_id
)
1193 await self
.client_facade
.AddCharm(None, entity_id
)
1196 async def addMachines(self
, series
, constraints
, container_type
,
1199 :param series string:
1200 Series holds the optional machine OS series.
1202 :param constraints string:
1203 Constraints holds the optional machine constraints.
1205 :param Container_type string:
1206 ContainerType optionally holds the type of the container (for
1207 instance ""lxc" or kvm"). It is not specified for top level
1210 :param parent_id string:
1211 ParentId optionally holds a placeholder pointing to another machine
1212 change or to a unit change. This value is only specified in the
1213 case this machine is a container, in which case also ContainerType
1216 params
= client
.AddMachineParams(
1218 constraints
=constraints
,
1219 container_type
=container_type
,
1220 parent_id
=self
.resolve(parent_id
),
1222 results
= await self
.client_facade
.AddMachines(params
)
1223 log
.debug('Added new machine %s', results
[0].machine
)
1224 return results
[0].machine
1226 async def addRelation(self
, endpoint1
, endpoint2
):
1228 :param endpoint1 string:
1229 :param endpoint2 string:
1230 Endpoint1 and Endpoint2 hold relation endpoints in the
1231 "application:interface" form, where the application is always a
1232 placeholder pointing to an application change, and the interface is
1233 optional. Examples are "$deploy-42:web" or just "$deploy-42".
1235 endpoints
= [endpoint1
, endpoint2
]
1236 # resolve indirect references
1237 for i
in range(len(endpoints
)):
1238 parts
= endpoints
[i
].split(':')
1239 parts
[0] = self
.resolve(parts
[0])
1240 endpoints
[i
] = ':'.join(parts
)
1242 log
.info('Relating %s <-> %s', *endpoints
)
1243 return await self
.model
.add_relation(*endpoints
)
1245 async def deploy(self
, charm
, series
, application
, options
, constraints
,
1246 storage
, endpoint_bindings
, resources
):
1248 :param charm string:
1249 Charm holds the URL of the charm to be used to deploy this
1252 :param series string:
1253 Series holds the series of the application to be deployed
1254 if the charm default is not sufficient.
1256 :param application string:
1257 Application holds the application name.
1259 :param options map[string]interface{}:
1260 Options holds application options.
1262 :param constraints string:
1263 Constraints holds the optional application constraints.
1265 :param storage map[string]string:
1266 Storage holds the optional storage constraints.
1268 :param endpoint_bindings map[string]string:
1269 EndpointBindings holds the optional endpoint bindings
1271 :param resources map[string]int:
1272 Resources identifies the revision to use for each resource
1273 of the application's charm.
1275 # resolve indirect references
1276 charm
= self
.resolve(charm
)
1277 # stringify all config values for API
1278 options
= {k
: str(v
) for k
, v
in options
.items()}
1279 # build param object
1280 app
= client
.ApplicationDeploy(
1283 application
=application
,
1285 constraints
=constraints
,
1287 endpoint_bindings
=endpoint_bindings
,
1288 resources
=resources
,
1291 log
.info('Deploying %s', charm
)
1292 await self
.app_facade
.Deploy([app
])
1295 async def addUnit(self
, application
, to
):
1297 :param application string:
1298 Application holds the application placeholder name for which a unit
1302 To holds the optional location where to add the unit, as a
1303 placeholder pointing to another unit change or to a machine change.
1305 application
= self
.resolve(application
)
1306 placement
= self
.resolve(to
)
1307 if self
._units
_by
_app
.get(application
):
1308 # enough units for this application already exist;
1309 # claim one, and carry on
1310 # NB: this should probably honor placement, but the juju client
1311 # doesn't, so we're not bothering, either
1312 unit_name
= self
._units
_by
_app
[application
].pop()
1313 log
.debug('Reusing unit %s for %s', unit_name
, application
)
1314 return self
.model
.units
[unit_name
]
1316 log
.debug('Adding new unit for %s%s', application
,
1317 ' to %s' % placement
if placement
else '')
1318 return await self
.model
.applications
[application
].add_unit(
1323 async def expose(self
, application
):
1325 :param application string:
1326 Application holds the placeholder name of the application that must
1329 application
= self
.resolve(application
)
1330 log
.info('Exposing %s', application
)
1331 return await self
.model
.applications
[application
].expose()
1333 async def setAnnotations(self
, id_
, entity_type
, annotations
):
1336 Id is the placeholder for the application or machine change
1337 corresponding to the entity to be annotated.
1339 :param entity_type EntityType:
1340 EntityType holds the type of the entity, "application" or
1343 :param annotations map[string]string:
1344 Annotations holds the annotations as key/value pairs.
1346 entity_id
= self
.resolve(id_
)
1348 entity
= self
.model
.state
.get_entity(entity_type
, entity_id
)
1350 entity
= await self
.model
._wait
_for
_new
(entity_type
, entity_id
)
1351 return await entity
.set_annotations(annotations
)
1354 class CharmStore(object):
1356 Async wrapper around theblues.charmstore.CharmStore
1358 def __init__(self
, loop
):
1360 self
._cs
= charmstore
.CharmStore()
1362 def __getattr__(self
, name
):
1364 Wrap method calls in coroutines that use run_in_executor to make them
1367 attr
= getattr(self
._cs
, name
)
1368 if not callable(attr
):
1369 wrapper
= partial(getattr, self
._cs
, name
)
1370 setattr(self
, name
, wrapper
)
1372 async def coro(*args
, **kwargs
):
1373 method
= partial(attr
, *args
, **kwargs
)
1374 return await self
.loop
.run_in_executor(None, method
)
1375 setattr(self
, name
, coro
)