124 lines
4.3 KiB
Python
124 lines
4.3 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 Mirantis Inc.
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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 traceback
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import os
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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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opts = [
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cfg.StrOpt('ec2_metadata_base_url',
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default='http://169.254.169.254/2009-04-04/',
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help='The base URL where the service looks for metadata'),
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]
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ec2nodes = [
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'ami-id', 'ami-launch-index', 'ami-manifest-path', 'ancestor-ami-ids',
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'hostname', 'block-device-mapping', 'kernel-id',
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'placement/availability-zone', 'instance-action', 'instance-id',
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'instance-type', 'product-codes', 'local-hostname', 'local-ipv4',
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'public-hostname', 'public-ipv4', 'ramdisk-id', 'reservation-id',
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'security-groups', 'public-keys/', 'public-keys/0/',
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'public-keys/0/openssh-key', 'admin_pass']
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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 EC2Service(base.BaseMetadataService):
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def __init__(self):
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super(EC2Service, self).__init__()
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self._enable_retry = True
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self.error_count = 0
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def load(self):
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super(EC2Service, self).load()
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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 Exception, err:
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LOG.debug(err)
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LOG.debug(traceback.format_exc())
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LOG.debug('Metadata not found at URL \'%s\'' %
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CONF.ec2_metadata_base_url)
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return False
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def _get_data(self, path):
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data = {}
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LOG.debug("Check for EC2 interface availability...")
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if not self._check_EC2():
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raise Exception("EC2 interface is not available")
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LOG.debug('Getting data for the path: %s' % path)
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if path.endswith('meta_data.json'):
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for key in ec2nodes:
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LOG.debug('Getting metadata from: %s' % key)
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try:
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data[key] = self._get_EC2_value(key)
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except:
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LOG.info("EC2 value %s is not available. Skip it." % key)
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# Saving keys to the local folder
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self._load_public_keys(data)
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if path.endswith('user_data'):
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norm_path = posixpath.join(CONF.ec2_metadata_base_url, 'user-data')
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LOG.debug('Getting metadata from: %(norm_path)s' % locals())
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try:
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req = urllib2.Request(norm_path)
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response = urllib2.urlopen(req)
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data = response.read()
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LOG.debug("Got data: %s" % data)
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except:
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LOG.error("EC2 user-data is not available.")
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return data
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def _check_EC2(self):
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try:
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data = self._get_EC2_value('')
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return True
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except:
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return False
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def _get_EC2_value(self, key):
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meta_path = posixpath.join(
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CONF.ec2_metadata_base_url, 'meta-data', key)
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req = urllib2.Request(meta_path)
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response = urllib2.urlopen(req)
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return response.read()
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def _load_public_keys(self, data):
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try:
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key_list = self._get_EC2_value('public-keys/')
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LOG.debug("Got a list of keys %s" % key_list)
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data['public_keys'] = {}
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for key_name in key_list.split('\n'):
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key_index = key_name.split('=')[0]
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LOG.debug('Loading key %s' % key_index)
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key = self._get_EC2_value(
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'public-keys/%s/openssh-key' % key_index)
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data['public_keys'].update({key_index: key})
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except Exception, ex:
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LOG.debug("Can't save public key %s" % ex)
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LOG.debug(traceback.format_exc())
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