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# This file is part of cloud-init. See LICENSE file for license information.
"""Base NoCloud KVM snapshot."""
import os
import shutil
import tempfile
from ..snapshots import Snapshot
class NoCloudKVMSnapshot(Snapshot):
"""NoCloud KVM image copy backed snapshot."""
platform_name = "nocloud-kvm"
def __init__(self, platform, properties, config, features, image_path):
"""Set up snapshot.
@param platform: platform object
@param properties: image properties
@param config: image config
@param features: supported feature flags
@param image_path: image file to snapshot.
"""
self._workd = tempfile.mkdtemp(prefix='NoCloudKVMSnapshot')
snapshot = os.path.join(self._workd, 'snapshot')
shutil.copyfile(image_path, snapshot)
self._image_path = snapshot
super(NoCloudKVMSnapshot, self).__init__(
platform, properties, config, features)
def launch(self, user_data, meta_data=None, block=True, start=True,
use_desc=None):
"""Launch instance.
@param user_data: user-data for the instance
@param instance_id: instance-id for the instance
@param block: wait until instance is created
@param start: start instance and wait until fully started
@param use_desc: description of snapshot instance use
@return_value: an Instance
"""
instance = self.platform.create_instance(
self.properties, self.config, self.features,
self._image_path, image_desc=str(self), use_desc=use_desc,
user_data=user_data, meta_data=meta_data)
if start:
instance.start()
return instance
def destroy(self):
"""Clean up snapshot data."""
shutil.rmtree(self._workd)
super(NoCloudKVMSnapshot, self).destroy()
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