def constraints_set(env_config, environment, service_name, constraint_strs):
"""
Machine constraints allow you to pick the hardware to which your services
will be deployed. Examples:
$ juju set-constraints --service-name mysql mem=8G cpu=4
$ juju set-constraints instance-type=t1.micro
Available constraints vary by provider type, and will be ignored if not
understood by the current environment's provider. The current set of
available constraints across all providers is:
On Amazon EC2:
* arch (CPU architecture: i386/amd64/arm; amd64 by default)
* cpu (processing power in Amazon ECU; 1 by default)
* mem (memory in [MGT]iB; 512M by default)
* instance-type (unset by default)
* ec2-zone (unset by default)
On Orchestra:
* orchestra-classes (unset by default)
On MAAS:
* maas-name (unset by default)
Service settings, if specified, will override environment settings, which
will in turn override the juju defaults of mem=512M, cpu=1, arch=amd64.
New constraints set on an entity will completely replace that entity's
pre-existing constraints.
To override an environment constraint with the juju default when setting
service constraints, just specify "name=" (rather than just not specifying
the constraint at all, which will cause it to inherit the environment's
value).
To entirely unset a constraint, specify "name=any".
"""
provider = environment.get_machine_provider()
constraint_set = yield provider.get_constraint_set()
constraints = constraint_set.parse(constraint_strs)
client = yield provider.connect()
try:
yield legacy.check_constraints(client, constraint_strs)
yield sync_environment_state(client, env_config, environment.name)
if service_name is None:
esm = EnvironmentStateManager(client)
yield esm.set_constraints(constraints)
else:
ssm = ServiceStateManager(client)
service = yield ssm.get_service_state(service_name)
yield service.set_constraints(constraints)
finally:
yield client.close()
def deploy(env_config, environment, repository_path, charm_name,
service_name, log, constraint_strs, config_file=None, upgrade=False,
num_units=1):
"""Deploy a charm within an environment.
This will publish the charm to the environment, creating
a service from the charm, and get it set to be launched
on a new machine. If --repository is not specified, it
will be taken from the environment variable JUJU_REPOSITORY.
"""
repo, charm_url = resolve(
charm_name, repository_path, environment.default_series)
log.info("Searching for charm %s in %s" % (charm_url, repo))
charm = yield repo.find(charm_url)
if upgrade:
if repo.type != "local" or charm.type != "dir":
raise CharmError(
charm.path,
"Only local directory charms can be upgraded on deploy")
charm.set_revision(charm.get_revision() + 1)
charm_id = str(charm_url.with_revision(charm.get_revision()))
# Validate config options prior to deployment attempt
service_options = {}
service_name = service_name or charm_url.name
if config_file:
service_options = parse_config_options(
config_file, service_name, charm)
charm = yield repo.find(charm_url)
charm_id = str(charm_url.with_revision(charm.get_revision()))
provider = environment.get_machine_provider()
placement_policy = provider.get_placement_policy()
constraint_set = yield provider.get_constraint_set()
constraints = constraint_set.parse(constraint_strs)
client = yield provider.connect()
try:
yield legacy.check_constraints(client, constraint_strs)
yield legacy.check_environment(
client, provider.get_legacy_config_keys())
yield sync_environment_state(client, env_config, environment.name)
# Publish the charm to juju
storage = yield provider.get_file_storage()
publisher = CharmPublisher(client, storage)
yield publisher.add_charm(charm_id, charm)
result = yield publisher.publish()
# In future we might have multiple charms be published at
# the same time. For now, extract the charm_state from the
# list.
charm_state = result[0]
# Create the service state
service_manager = ServiceStateManager(client)
service_state = yield service_manager.add_service_state(
service_name, charm_state, constraints)
# Use the charm's ConfigOptions instance to validate service
# options.. Invalid options passed will thrown an exception
# and prevent the deploy.
state = yield service_state.get_config()
charm_config = yield charm_state.get_config()
# return the validated options with the defaults included
service_options = charm_config.validate(service_options)
state.update(service_options)
yield state.write()
# Create desired number of service units
if (yield service_state.is_subordinate()):
log.info("Subordinate %r awaiting relationship "
"to principal for deployment.", service_name)
else:
for i in xrange(num_units):
unit_state = yield service_state.add_unit_state()
yield place_unit(client, placement_policy, unit_state)
# Check if we have any peer relations to establish
if charm.metadata.peers:
relation_manager = RelationStateManager(client)
for peer_name, peer_info in charm.metadata.peers.items():
yield relation_manager.add_relation_state(
RelationEndpoint(service_name,
peer_info["interface"],
peer_name,
"peer"))
log.info("Charm deployed as service: %r", service_name)
finally:
yield client.close()