143 lines
5.0 KiB
Python
143 lines
5.0 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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import json
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from oslo_log import log
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import requests
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from ironic_python_agent import backoff
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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.openstack.common import loopingcall
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LOG = log.getLogger(__name__)
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class APIClient(object):
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api_version = 'v1'
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payload_version = '2'
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def __init__(self, api_url, driver_name):
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self.api_url = api_url.rstrip('/')
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self.driver_name = driver_name
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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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self.log = log.getLogger(__name__)
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def _request(self, method, path, data=None):
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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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request_headers = {
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'Content-Type': 'application/json',
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'Accept': 'application/json',
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}
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return self.session.request(method,
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request_url,
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headers=request_headers,
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data=data)
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def heartbeat(self, uuid, advertise_address):
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path = '/{api_version}/nodes/{uuid}/vendor_passthru/heartbeat'.format(
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api_version=self.api_version,
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uuid=uuid
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)
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data = {
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'agent_url': self._get_agent_url(advertise_address)
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}
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try:
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response = self._request('POST', path, data=data)
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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.ACCEPTED:
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msg = 'Invalid status code: {0}'.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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timer = backoff.BackOffLoopingCall(
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self._do_lookup,
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hardware_info=hardware_info)
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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 backoff.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):
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"""The actual call to lookup a node. Should be called inside
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loopingcall.BackOffLoopingCall.
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"""
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path = '/{api_version}/drivers/{driver}/vendor_passthru/lookup'.format(
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api_version=self.api_version,
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driver=self.driver_name
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)
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# This hardware won't be saved on the node currently, because of
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# how driver_vendor_passthru is implemented (no node saving).
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data = {
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'version': self.payload_version,
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'inventory': hardware_info
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}
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# Make the POST, make sure we get back normal data/status codes and
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# content
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try:
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response = self._request('POST', path, data=data)
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except Exception as e:
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self.log.warning('POST failed: %s' % str(e))
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return False
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if response.status_code != requests.codes.OK:
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self.log.warning('Invalid status code: %s' % response.status_code)
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return False
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try:
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content = json.loads(response.content)
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except Exception as e:
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self.log.warning('Error decoding response: %s' % str(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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self.log.warning('Got invalid node data from the API: %s' %
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content)
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return False
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if 'heartbeat_timeout' not in content:
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self.log.warning('Got invalid heartbeat from the API: %s' %
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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://{0}:{1}'.format(advertise_address[0],
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advertise_address[1])
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