/usr/lib/python3/dist-packages/pylxd/container.py is in python3-pylxd 2.0.0-0ubuntu1.
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#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import six
from pylxd import mixin
from pylxd.containerState import ContainerState
from pylxd.operation import Operation
class Container(mixin.Waitable, mixin.Marshallable):
"""An LXD Container.
This class is not intended to be used directly, but rather to be used
via `Client.containers.create`.
"""
__slots__ = [
'_client',
'architecture', 'config', 'created_at', 'devices', 'ephemeral',
'expanded_config', 'expanded_devices', 'name', 'profiles', 'status'
]
@classmethod
def get(cls, client, name):
"""Get a container by name."""
response = client.api.containers[name].get()
if response.status_code == 404:
raise NameError('No container named "{}"'.format(name))
container = cls(_client=client, **response.json()['metadata'])
return container
@classmethod
def all(cls, client):
"""Get all containers.
Containers returned from this method will only have the name
set, as that is the only property returned from LXD. If more
information is needed, `Container.reload` is the method call
that should be used.
"""
response = client.api.containers.get()
containers = []
for url in response.json()['metadata']:
name = url.split('/')[-1]
containers.append(cls(_client=client, name=name))
return containers
@classmethod
def create(cls, client, config, wait=False):
"""Create a new container config."""
response = client.api.containers.post(json=config)
if wait:
Operation.wait_for_operation(client, response.json()['operation'])
return cls(name=config['name'])
def __init__(self, **kwargs):
super(Container, self).__init__()
for key, value in kwargs.iteritems():
setattr(self, key, value)
def reload(self):
"""Reload the container information."""
response = self._client.api.containers[self.name].get()
if response.status_code == 404:
raise NameError(
'Container named "{}" has gone away'.format(self.name))
for key, value in response.json()['metadata'].iteritems():
setattr(self, key, value)
def update(self, wait=False):
"""Update the container in lxd from local changes."""
marshalled = self.marshall()
# These two properties are explicitly not allowed.
del marshalled['name']
del marshalled['status']
response = self._client.api.containers[self.name].put(
json=marshalled)
if wait:
self.wait_for_operation(response.json()['operation'])
def rename(self, name, wait=False):
"""Rename a container."""
response = self._client.api.containers[
self.name].post(json={'name': name})
if wait:
self.wait_for_operation(response.json()['operation'])
self.name = name
def delete(self, wait=False):
"""Delete the container."""
response = self._client.api.containers[self.name].delete()
if wait:
self.wait_for_operation(response.json()['operation'])
def _set_state(self, state, timeout=30, force=True, wait=False):
response = self._client.api.containers[self.name].state.put(json={
'action': state,
'timeout': timeout,
'force': force
})
if wait:
self.wait_for_operation(response.json()['operation'])
self.reload()
def state(self):
state = ContainerState()
response = self._client.api.containers[self.name].state.get()
for key, value in response.json()['metadata'].iteritems():
setattr(state, key, value)
return state
def start(self, timeout=30, force=True, wait=False):
"""Start the container."""
return self._set_state('start',
timeout=timeout,
force=force,
wait=wait)
def stop(self, timeout=30, force=True, wait=False):
"""Stop the container."""
return self._set_state('stop',
timeout=timeout,
force=force,
wait=wait)
def restart(self, timeout=30, force=True, wait=False):
"""Restart the container."""
return self._set_state('restart',
timeout=timeout,
force=force,
wait=wait)
def freeze(self, timeout=30, force=True, wait=False):
"""Freeze the container."""
return self._set_state('freeze',
timeout=timeout,
force=force,
wait=wait)
def unfreeze(self, timeout=30, force=True, wait=False):
"""Unfreeze the container."""
return self._set_state('unfreeze',
timeout=timeout,
force=force,
wait=wait)
def snapshot(self, name, stateful=False, wait=False):
"""Take a snapshot of the container."""
response = self._client.api.containers[self.name].snapshots.post(json={
'name': name, 'stateful': stateful})
if wait:
self.wait_for_operation(response.json()['operation'])
def list_snapshots(self):
"""List all container snapshots."""
response = self._client.api.containers[self.name].snapshots.get()
return [snapshot.split('/')[-1]
for snapshot in response.json()['metadata']]
def rename_snapshot(self, old, new, wait=False):
"""Rename a snapshot."""
response = self._client.api.containers[
self.name].snapshots[old].post(json={
'name': new
})
if wait:
self.wait_for_operation(response.json()['operation'])
def delete_snapshot(self, name, wait=False):
"""Delete a snapshot."""
response = self._client.api.containers[
self.name].snapshots[name].delete()
if wait:
self.wait_for_operation(response.json()['operation'])
def get_file(self, filepath):
"""Get a file from the container."""
response = self._client.api.containers[self.name].files.get(
params={'path': filepath})
if response.status_code == 500:
# XXX: rockstar (15 Feb 2016) - This should really return a 404.
# I blame LXD. :)
raise IOError('Error reading "{}"'.format(filepath))
return response.content
def put_file(self, filepath, data):
"""Put a file on the container."""
response = self._client.api.containers[self.name].files.post(
params={'path': filepath}, data=data)
return response.status_code == 200
def execute(self, commands, environment={}):
"""Execute a command on the container."""
# XXX: rockstar (15 Feb 2016) - This functionality is limited by
# design, for now. It needs to grow the ability to return web sockets
# and perform interactive functions.
if isinstance(commands, six.string_types):
commands = [commands]
response = self._client.api.containers[self.name]['exec'].post(json={
'command': commands,
'environment': environment,
'wait-for-websocket': False,
'interactive': False,
})
operation_id = response.json()['operation']
self.wait_for_operation(operation_id)
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