106 lines
3.6 KiB
Python
106 lines
3.6 KiB
Python
# Copyright 2014 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 oslo.config import cfg
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import requests
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from ironic.common import exception
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from ironic.common.i18n import _
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from ironic.openstack.common import jsonutils
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from ironic.openstack.common import log
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agent_opts = [
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cfg.StrOpt('agent_api_version',
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default='v1',
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help='API version to use for communicating with the ramdisk '
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'agent.')
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]
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CONF = cfg.CONF
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CONF.register_opts(agent_opts, group='agent')
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LOG = log.getLogger(__name__)
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class AgentClient(object):
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"""Client for interacting with nodes via a REST API."""
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def __init__(self):
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self.session = requests.Session()
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def _get_command_url(self, node):
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if 'agent_url' not in node.driver_info:
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raise exception.IronicException(_('Agent driver requires '
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'agent_url in driver_info'))
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return ('%(agent_url)s/%(api_version)s/commands' %
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{'agent_url': node.driver_info['agent_url'],
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'api_version': CONF.agent.agent_api_version})
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def _get_command_body(self, method, params):
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return jsonutils.dumps({
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'name': method,
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'params': params,
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})
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def _command(self, node, method, params, wait=False):
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url = self._get_command_url(node)
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body = self._get_command_body(method, params)
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request_params = {
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'wait': str(wait).lower()
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}
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headers = {
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'Content-Type': 'application/json'
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}
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response = self.session.post(url,
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params=request_params,
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data=body,
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headers=headers)
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# TODO(russellhaering): real error handling
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return response.json()
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def get_commands_status(self, node):
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url = self._get_command_url(node)
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headers = {'Content-Type': 'application/json'}
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res = self.session.get(url, headers=headers)
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return res.json()['commands']
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def deploy_is_done(self, node):
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commands = self.get_commands_status(node)
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if not commands:
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return False
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last_command = commands[-1]
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if last_command['command_name'] != 'prepare_image':
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# catches race condition where prepare_image is still processing
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# so deploy hasn't started yet
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return False
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if last_command['command_status'] != 'RUNNING':
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return True
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return False
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def prepare_image(self, node, image_info, wait=False):
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"""Call the `prepare_image` method on the node."""
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LOG.debug('Preparing image %(image)s on node %(node)s.',
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{'image': image_info.get('id'),
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'node': self._get_command_url(node)})
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return self._command(node=node,
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method='standby.prepare_image',
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params={
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'image_info': image_info,
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},
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wait=wait)
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