184 lines
7.2 KiB
Python
184 lines
7.2 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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from oslo_log import log
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from oslo_serialization import jsonutils
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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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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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self.session.headers.update({'Content-Type': 'application/json'})
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def _get_command_url(self, node):
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agent_url = node.driver_internal_info.get('agent_url')
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if not agent_url:
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# (lintan) Keep backwards compatible with booted nodes before this
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# change. Remove this after Kilo.
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agent_url = node.driver_info.get('agent_url')
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if not agent_url:
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raise exception.IronicException(_('Agent driver requires '
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'agent_url in '
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'driver_internal_info'))
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return ('%(agent_url)s/%(api_version)s/commands' %
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{'agent_url': 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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LOG.debug('Executing agent command %(method)s for node %(node)s',
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{'node': node.uuid, 'method': method})
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try:
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response = self.session.post(url, params=request_params, data=body)
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except requests.RequestException as e:
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msg = (_('Error invoking agent command %(method)s for node '
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'%(node)s. Error: %(error)s') %
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{'method': method, 'node': node.uuid, 'error': e})
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LOG.error(msg)
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raise exception.IronicException(msg)
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# TODO(russellhaering): real error handling
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try:
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result = response.json()
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except ValueError:
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msg = _(
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'Unable to decode response as JSON.\n'
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'Request URL: %(url)s\nRequest body: "%(body)s"\n'
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'Response status code: %(code)s\n'
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'Response: "%(response)s"'
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) % ({'response': response.text, 'body': body, 'url': url,
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'code': response.status_code})
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LOG.error(msg)
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raise exception.IronicException(msg)
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LOG.debug('Agent command %(method)s for node %(node)s returned '
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'result %(res)s, error %(error)s, HTTP status code %(code)d',
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{'node': node.uuid, 'method': method,
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'res': result.get('command_result'),
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'error': result.get('command_error'),
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'code': response.status_code})
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return result
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def get_commands_status(self, node):
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url = self._get_command_url(node)
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LOG.debug('Fetching status of agent commands for node %s', node.uuid)
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resp = self.session.get(url)
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result = resp.json()['commands']
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status = '; '.join('%(cmd)s: result "%(res)s", error "%(err)s"' %
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{'cmd': r.get('command_name'),
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'res': r.get('command_result'),
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'err': r.get('command_error')}
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for r in result)
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LOG.debug('Status of agent commands for node %(node)s: %(status)s',
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{'node': node.uuid, 'status': status})
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return result
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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': node.uuid})
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params = {'image_info': image_info}
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# this should be an http(s) URL
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configdrive = node.instance_info.get('configdrive')
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if configdrive is not None:
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params['configdrive'] = configdrive
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return self._command(node=node,
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method='standby.prepare_image',
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params=params,
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wait=wait)
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def start_iscsi_target(self, node, iqn, portal_port=3260):
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"""Expose the node's disk as an ISCSI target."""
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params = {'iqn': iqn, 'portal_port': portal_port}
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return self._command(node=node,
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method='iscsi.start_iscsi_target',
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params=params,
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wait=True)
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def install_bootloader(self, node, root_uuid, efi_system_part_uuid=None):
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"""Install a boot loader on the image."""
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params = {'root_uuid': root_uuid,
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'efi_system_part_uuid': efi_system_part_uuid}
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return self._command(node=node,
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method='image.install_bootloader',
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params=params,
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wait=True)
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def get_clean_steps(self, node, ports):
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params = {
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'node': node.as_dict(),
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'ports': [port.as_dict() for port in ports]
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}
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return self._command(node=node,
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method='clean.get_clean_steps',
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params=params,
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wait=True)
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def execute_clean_step(self, step, node, ports):
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params = {
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'step': step,
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'node': node.as_dict(),
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'ports': [port.as_dict() for port in ports],
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'clean_version': node.driver_internal_info.get(
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'hardware_manager_version')
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}
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return self._command(node=node,
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method='clean.execute_clean_step',
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params=params)
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def power_off(self, node):
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"""Soft powers off the bare metal node by shutting down ramdisk OS."""
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return self._command(node=node,
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method='standby.power_off',
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params={})
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def sync(self, node):
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"""Flush file system buffers forcing changed blocks to disk."""
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return self._command(node=node,
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method='standby.sync',
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params={},
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wait=True)
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