118 lines
4.0 KiB
Python
118 lines
4.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 Cloudbase Solutions Srl
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import posixpath
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import urllib2
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import urlparse
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from cloudbaseinit.metadata.services import base
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from cloudbaseinit.openstack.common import cfg
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from cloudbaseinit.openstack.common import log as logging
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from cloudbaseinit.osutils import factory as osutils_factory
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opts = [
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cfg.StrOpt('metadata_base_url', default='http://169.254.169.254/',
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help='The base URL where the service looks for metadata'),
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]
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CONF = cfg.CONF
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CONF.register_opts(opts)
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LOG = logging.getLogger(__name__)
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class HttpService(base.BaseMetadataService):
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def __init__(self):
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super(HttpService, self).__init__()
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self._enable_retry = True
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def _check_metadata_ip_route(self):
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'''
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Workaround for: https://bugs.launchpad.net/quantum/+bug/1174657
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'''
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osutils = osutils_factory.OSUtilsFactory().get_os_utils()
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if osutils.check_os_version(6, 0):
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# 169.254.x.x addresses are not getting routed starting from
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# Windows Vista / 2008
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metadata_netloc = urlparse.urlparse(CONF.metadata_base_url).netloc
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metadata_host = metadata_netloc.split(':')[0]
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if metadata_host.startswith("169.254."):
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if not osutils.check_static_route_exists(metadata_host):
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(interface_index, gateway) = osutils.get_default_gateway()
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if gateway:
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try:
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osutils.add_static_route(metadata_host,
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"255.255.255.255",
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gateway,
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interface_index,
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10)
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except Exception, ex:
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# Ignore it
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LOG.exception(ex)
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def load(self):
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super(HttpService, self).load()
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self._check_metadata_ip_route()
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try:
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self.get_meta_data('openstack')
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return True
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except:
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LOG.debug('Metadata not found at URL \'%s\'' %
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CONF.metadata_base_url)
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return False
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@property
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def can_post_password(self):
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return True
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def _get_response(self, req):
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try:
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return urllib2.urlopen(req)
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except urllib2.HTTPError as ex:
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if ex.code == 404:
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raise base.NotExistingMetadataException()
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else:
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raise
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def _get_data(self, path):
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norm_path = posixpath.join(CONF.metadata_base_url, path)
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LOG.debug('Getting metadata from: %(norm_path)s' % locals())
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req = urllib2.Request(norm_path)
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response = self._get_response(req)
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return response.read()
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def _post_data(self, path, data):
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norm_path = posixpath.join(CONF.metadata_base_url, path)
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LOG.debug('Posting metadata to: %(norm_path)s' % locals())
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req = urllib2.Request(norm_path, data=data)
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self._get_response(req)
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return True
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def post_password(self, enc_password_b64, version='latest'):
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try:
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return super(HttpService, self).post_password(enc_password_b64,
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version)
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except urllib2.HTTPError as ex:
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if ex.code == 409:
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# Password already set
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return False
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else:
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raise
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