def refresh_status(self):
"""Refresh the status information of the container.
"""
containers = lxc.get_container_info(self.container_path, name=self.name)
if not containers:
raise error.ContainerError(
'No container found in directory %s with name of %s.' %
(self.container_path, self.name))
attribute_values = containers[0]
for attribute, value in attribute_values.iteritems():
setattr(self, attribute, value)
def get_all(self):
"""Get details of all containers.
@return: A dictionary of all containers with detailed attributes,
indexed by container name.
"""
info_collection = lxc.get_container_info(self.container_path)
containers = {}
for info in info_collection:
container = Container.createFromExistingDir(self.container_path,
**info)
containers[container.name] = container
return containers
def get_all(self, force_update=False):
"""Get details of all containers.
Retrieves all containers owned by the bucket. Note that this doesn't
include the base container, or any containers owned by the container
pool.
@param force_update: Boolean, ignore cached values if set.
@return: A dictionary of all containers with detailed attributes,
indexed by container name.
"""
info_collection = lxc.get_container_info(self.container_path)
containers = {} if force_update else self.container_cache
for info in info_collection:
if info["name"] in containers:
continue
container = Container.create_from_existing_dir(self.container_path,
**info)
# Active containers have an ID. Zygotes and base containers, don't.
if container.id is not None:
containers[container.id] = container
self.container_cache = containers
return containers
def __init__(self,
container_path,
name,
attribute_values,
src=None,
snapshot=False,
host_path=None):
"""Initialize an object of LXC container with given attribute values.
@param container_path: Directory that stores the container.
@param name: Name of the container.
@param attribute_values: A dictionary of attribute values for the
container.
@param src: An optional source container. If provided, the source
continer is cloned, and the new container will point to the
clone.
@param snapshot: Whether or not to create a snapshot clone. By default,
this is false. If a snapshot is requested and creating
a snapshot clone fails, a full clone will be attempted.
@param host_path: If set to None (the default), a host path will be
generated based on constants.DEFAULT_SHARED_HOST_PATH.
Otherwise, this can be used to override the host path
of the new container, for testing purposes.
"""
# Check if this is a pre-existing LXC container. Do this before calling
# the super ctor, because that triggers container creation.
exists = lxc.get_container_info(container_path, name=name)
super(Zygote, self).__init__(container_path, name, attribute_values,
src, snapshot)
logging.debug('Creating Zygote (lxcpath:%s name:%s)', container_path,
name)
# host_path is a directory within a shared bind-mount, which enables
# bind-mounts from the host system to be shared with the LXC container.
if host_path is not None:
# Allow the host_path to be injected, for testing.
self.host_path = host_path
else:
if exists:
# Pre-existing Zygotes must have a host path.
self.host_path = self._find_existing_host_dir()
if self.host_path is None:
raise error.ContainerError(
'Container %s has no host path.' %
os.path.join(container_path, name))
else:
# New Zygotes use a predefined template to generate a host path.
self.host_path = os.path.join(
os.path.realpath(constants.DEFAULT_SHARED_HOST_PATH),
self.name)
# host_path_ro is a directory for holding intermediate mount points,
# which are necessary when creating read-only bind mounts. See the
# mount_dir method for more details.
#
# Generate a host_path_ro based on host_path.
ro_dir, ro_name = os.path.split(self.host_path.rstrip(os.path.sep))
self.host_path_ro = os.path.join(ro_dir, '%s.ro' % ro_name)
# Remember mounts so they can be cleaned up in destroy.
self.mounts = []
if exists:
self._find_existing_bind_mounts()
else:
# Creating a new Zygote - initialize the host dirs. Don't use sudo,
# so that the resulting directories can be accessed by autoserv (for
# SSP installation, etc).
if not lxc_utils.path_exists(self.host_path):
os.makedirs(self.host_path)
if not lxc_utils.path_exists(self.host_path_ro):
os.makedirs(self.host_path_ro)
# Create the mount point within the container's rootfs.
# Changes within container's rootfs require sudo.
utils.run('sudo mkdir %s' % os.path.join(
self.rootfs, constants.CONTAINER_HOST_DIR.lstrip(os.path.sep)))
self.mount_dir(self.host_path, constants.CONTAINER_HOST_DIR)
