76975f04e5
This change will first attempt to get ec2 metadata from a v2 config drive before falling back to the nova metadata server if no config drive is detected. Config drive is enabled in overcloud nodes, so using this for os-collect-config will allow the undercloud nova metadata server to be disabled. V2 of the config-drive was released in OpenStack Folsom, so a decision was made to not support V1 discovery at all. This makes the block device candidate selection much simpler than the cloud-init one[1]. [1] https://git.launchpad.net/cloud-init/tree/cloudinit/sources/DataSourceConfigDrive.py#n219 Change-Id: I2aec0544fe40c2e901aee38c79bb838a627d20da Closes-Bug: #1619074
81 lines
2.6 KiB
Python
81 lines
2.6 KiB
Python
# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
# implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
import json
|
|
import os
|
|
|
|
from oslo_config import cfg
|
|
from oslo_log import log
|
|
|
|
from os_collect_config import cache
|
|
from os_collect_config import common
|
|
from os_collect_config import config_drive
|
|
from os_collect_config import exc
|
|
|
|
EC2_METADATA_URL = 'http://169.254.169.254/latest/meta-data'
|
|
CONF = cfg.CONF
|
|
|
|
opts = [
|
|
cfg.StrOpt('metadata-url',
|
|
default=EC2_METADATA_URL,
|
|
help='URL to query for EC2 Metadata'),
|
|
cfg.FloatOpt('timeout', default=10,
|
|
help='Seconds to wait for the connection and read request'
|
|
' timeout.')
|
|
]
|
|
name = 'ec2'
|
|
|
|
|
|
class Collector(object):
|
|
def __init__(self, requests_impl=common.requests):
|
|
self._requests_impl = requests_impl
|
|
self.session = requests_impl.Session()
|
|
|
|
def _fetch_metadata(self, fetch_url, timeout):
|
|
try:
|
|
r = self.session.get(fetch_url, timeout=timeout)
|
|
r.raise_for_status()
|
|
except self._requests_impl.exceptions.RequestException as e:
|
|
log.getLogger(__name__).warn(e)
|
|
raise exc.Ec2MetadataNotAvailable
|
|
content = r.text
|
|
if fetch_url[-1] == '/':
|
|
new_content = {}
|
|
for subkey in content.split("\n"):
|
|
if '=' in subkey:
|
|
subkey = subkey[:subkey.index('=')] + '/'
|
|
sub_fetch_url = fetch_url + subkey
|
|
if subkey[-1] == '/':
|
|
subkey = subkey[:-1]
|
|
new_content[subkey] = self._fetch_metadata(
|
|
sub_fetch_url, timeout)
|
|
content = new_content
|
|
return content
|
|
|
|
def collect(self):
|
|
cache_path = cache.get_path('ec2')
|
|
if os.path.exists(cache_path):
|
|
with open(cache_path) as f:
|
|
metadata = json.load(f)
|
|
if metadata:
|
|
return [('ec2', metadata)]
|
|
|
|
md = config_drive.get_metadata()
|
|
if md:
|
|
return [('ec2', md)]
|
|
|
|
root_url = '%s/' % (CONF.ec2.metadata_url)
|
|
return [('ec2', self._fetch_metadata(root_url, CONF.ec2.timeout))]
|