212 lines
7.8 KiB
Python
212 lines
7.8 KiB
Python
# Copyright 2013 Rackspace, Inc.
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#
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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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#
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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,
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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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from distutils.version import StrictVersion
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from oslo_config import cfg
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from oslo_log import log
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from oslo_serialization import jsonutils
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from oslo_service import loopingcall
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import requests
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from ironic_python_agent import encoding
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from ironic_python_agent import errors
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from ironic_python_agent import netutils
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from ironic_python_agent import utils
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from ironic_python_agent import version
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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# TODO(TheJulia): This should be increased at some point.
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MIN_IRONIC_VERSION = (1, 31)
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AGENT_VERSION_IRONIC_VERSION = (1, 36)
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AGENT_TOKEN_IRONIC_VERSION = (1, 62)
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class APIClient(object):
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api_version = 'v1'
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lookup_api = '/%s/lookup' % api_version
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heartbeat_api = '/%s/heartbeat/{uuid}' % api_version
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_ironic_api_version = None
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agent_token = None
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def __init__(self, api_url):
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self.api_url = api_url.rstrip('/')
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# Only keep alive a maximum of 2 connections to the API. More will be
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# opened if they are needed, but they will be closed immediately after
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# use.
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adapter = requests.adapters.HTTPAdapter(pool_connections=2,
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pool_maxsize=2)
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self.session = requests.Session()
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self.session.mount(self.api_url, adapter)
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self.encoder = encoding.RESTJSONEncoder()
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def _request(self, method, path, data=None, headers=None, **kwargs):
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request_url = '{api_url}{path}'.format(api_url=self.api_url, path=path)
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if data is not None:
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data = self.encoder.encode(data)
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headers = headers or {}
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headers.update({
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'Content-Type': 'application/json',
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'Accept': 'application/json',
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})
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verify, cert = utils.get_ssl_client_options(CONF)
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return self.session.request(method,
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request_url,
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headers=headers,
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data=data,
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verify=verify,
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cert=cert,
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**kwargs)
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def _get_ironic_api_version_header(self):
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# TODO(TheJulia): It would be great to improve version handling
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# logic, but we need to ship a newer version if we can.
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ironic_version = "%d.%d" % self._get_ironic_api_version()
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agent_token_version = "%d.%d" % AGENT_TOKEN_IRONIC_VERSION
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if (StrictVersion(ironic_version)
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>= StrictVersion(agent_token_version)):
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version = agent_token_version
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else:
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version = ironic_version
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return {'X-OpenStack-Ironic-API-Version': version}
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def _get_ironic_api_version(self):
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if not self._ironic_api_version:
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try:
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response = self._request('GET', '/')
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data = jsonutils.loads(response.content)
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version = data['default_version']['version'].split('.')
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self._ironic_api_version = (int(version[0]), int(version[1]))
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except Exception:
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LOG.exception("An error occurred while attempting to discover "
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"the available Ironic API versions, falling "
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"back to using version %s",
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".".join(map(str, MIN_IRONIC_VERSION)))
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return MIN_IRONIC_VERSION
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return self._ironic_api_version
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def heartbeat(self, uuid, advertise_address):
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path = self.heartbeat_api.format(uuid=uuid)
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data = {'callback_url': self._get_agent_url(advertise_address)}
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api_ver = self._get_ironic_api_version()
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if api_ver >= AGENT_TOKEN_IRONIC_VERSION:
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data['agent_token'] = self.agent_token
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if api_ver >= AGENT_VERSION_IRONIC_VERSION:
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data['agent_version'] = version.version_info.release_string()
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headers = self._get_ironic_api_version_header()
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try:
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response = self._request('POST', path, data=data, headers=headers)
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except Exception as e:
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raise errors.HeartbeatError(str(e))
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if response.status_code == requests.codes.CONFLICT:
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data = jsonutils.loads(response.content)
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raise errors.HeartbeatConflictError(data.get('faultstring'))
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elif response.status_code != requests.codes.ACCEPTED:
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msg = 'Invalid status code: {}'.format(response.status_code)
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raise errors.HeartbeatError(msg)
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def lookup_node(self, hardware_info, timeout, starting_interval,
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node_uuid=None):
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timer = loopingcall.BackOffLoopingCall(
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self._do_lookup,
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hardware_info=hardware_info,
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node_uuid=node_uuid)
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try:
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node_content = timer.start(starting_interval=starting_interval,
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timeout=timeout).wait()
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except loopingcall.LoopingCallTimeOut:
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raise errors.LookupNodeError('Could not look up node info. Check '
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'logs for details.')
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return node_content
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def _do_lookup(self, hardware_info, node_uuid):
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"""The actual call to lookup a node.
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Should be called as a `loopingcall.BackOffLoopingCall`.
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"""
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params = {
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'addresses': ','.join(iface.mac_address
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for iface in hardware_info['interfaces']
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if iface.mac_address)
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}
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if node_uuid:
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params['node_uuid'] = node_uuid
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try:
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response = self._request(
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'GET', self.lookup_api,
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headers=self._get_ironic_api_version_header(),
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params=params)
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except Exception as err:
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LOG.exception(
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'Unhandled error looking up node with addresses %r at %s: %s',
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params['addresses'], self.api_url, err,
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)
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return False
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if response.status_code != requests.codes.OK:
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LOG.warning(
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'Failed looking up node with addresses %r at %s, '
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'status code: %s',
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params['addresses'], self.api_url, response.status_code,
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)
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return False
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try:
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content = jsonutils.loads(response.content)
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except Exception as e:
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LOG.warning('Error decoding response: %s', e)
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return False
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# Check for valid response data
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if 'node' not in content or 'uuid' not in content['node']:
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LOG.warning(
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'Got invalid node data in response to query for node '
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'with addresses %r from %s: %s',
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params['addresses'], self.api_url, content,
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)
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return False
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if 'config' not in content:
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# Old API
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try:
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content['config'] = {'heartbeat_timeout':
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content.pop('heartbeat_timeout')}
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except KeyError:
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LOG.warning('Got invalid heartbeat from the API: %s', content)
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return False
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# Got valid content
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raise loopingcall.LoopingCallDone(retvalue=content)
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def _get_agent_url(self, advertise_address):
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return 'http://{}:{}'.format(netutils.wrap_ipv6(advertise_address[0]),
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advertise_address[1])
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