81 lines
2.5 KiB
Python
81 lines
2.5 KiB
Python
"""
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Copyright 2013 Rackspace, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import base64
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import json
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import os
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from teeth_agent import utils
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class ConfigDriveWriter(object):
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def __init__(self):
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self.metadata = {}
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self.files = utils.get_ordereddict()
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def add_metadata(self, key, value):
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self.metadata[key] = value
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def add_file(self, filepath, contents):
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self.files[filepath] = contents
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def write(self, location, prefix='openstack', version='latest'):
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os.makedirs(os.path.join(location, prefix, version))
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os.makedirs(os.path.join(location, prefix, 'content'))
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metadata = {}
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for k, v in self.metadata.iteritems():
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metadata[k] = v
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if self.files:
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metadata['files'] = []
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filenumber = 0
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for filepath, contents in self.files.iteritems():
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content_path = '/content/{0:04}'.format(filenumber)
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file_info = {
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'content_path': content_path,
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'path': filepath
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}
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metadata['files'].append(file_info)
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content_path = os.path.join(location, prefix, content_path[1:])
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with open(content_path, 'wb') as f:
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f.write(contents)
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filenumber += 1
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json_metadata = json.dumps(metadata)
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metadata_path = '{0}/{1}/meta_data.json'.format(prefix, version)
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metadata_path = os.path.join(location, metadata_path)
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with open(metadata_path, 'wb') as f:
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f.write(json_metadata)
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def write_configdrive(location, metadata, files, prefix='openstack',
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version='latest'):
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"""Generates and writes a valid configdrive to `location`.
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`files` are passed in as a dict {path: base64_contents}.
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"""
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writer = ConfigDriveWriter()
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for k, v in metadata.iteritems():
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writer.add_metadata(k, v)
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for path, b64_contents in files.iteritems():
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contents = base64.b64decode(b64_contents)
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writer.add_file(path, contents)
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writer.write(location, prefix=prefix, version=version)
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