293 lines
12 KiB
Python
293 lines
12 KiB
Python
# Copyright (c) 2011 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""The hosts admin extension."""
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from oslo_log import log as logging
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import webob.exc
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from nova.api.openstack import common
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from nova.api.openstack.compute.schemas import hosts
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from nova.api.openstack import wsgi
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from nova.api import validation
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from nova.compute import api as compute
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from nova import context as nova_context
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from nova import exception
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from nova import objects
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from nova.policies import hosts as hosts_policies
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LOG = logging.getLogger(__name__)
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class HostController(wsgi.Controller):
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"""The Hosts API controller for the OpenStack API."""
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def __init__(self):
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super(HostController, self).__init__()
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self.api = compute.HostAPI()
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@wsgi.Controller.api_version("2.1", "2.42")
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@validation.query_schema(hosts.index_query)
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@wsgi.expected_errors(())
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def index(self, req):
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"""Returns a dict in the format
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| {'hosts': [{'host_name': 'some.host.name',
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| 'service': 'cells',
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| 'zone': 'internal'},
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| {'host_name': 'some.other.host.name',
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| 'service': 'cells',
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| 'zone': 'internal'},
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| {'host_name': 'some.celly.host.name',
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| 'service': 'cells',
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| 'zone': 'internal'},
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| {'host_name': 'compute1.host.com',
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| 'service': 'compute',
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| 'zone': 'nova'},
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| {'host_name': 'compute2.host.com',
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| 'service': 'compute',
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| 'zone': 'nova'},
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| {'host_name': 'sched1.host.com',
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| 'service': 'scheduler',
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| 'zone': 'internal'},
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| {'host_name': 'sched2.host.com',
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| 'service': 'scheduler',
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| 'zone': 'internal'},
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| {'host_name': 'vol1.host.com',
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| 'service': 'volume',
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| 'zone': 'internal'}]}
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"""
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context = req.environ['nova.context']
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context.can(hosts_policies.POLICY_NAME % 'list',
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target={})
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filters = {'disabled': False}
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zone = req.GET.get('zone', None)
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if zone:
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filters['availability_zone'] = zone
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services = self.api.service_get_all(context, filters=filters,
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set_zones=True, all_cells=True)
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hosts = []
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api_services = ('nova-osapi_compute', 'nova-metadata')
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for service in services:
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if service.binary not in api_services:
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hosts.append({'host_name': service['host'],
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'service': service['topic'],
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'zone': service['availability_zone']})
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return {'hosts': hosts}
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@wsgi.Controller.api_version("2.1", "2.42")
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@wsgi.expected_errors((400, 404, 501))
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@validation.schema(hosts.update)
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def update(self, req, id, body):
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"""Return booleanized version of body dict.
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:param Request req: The request object (containing 'nova-context'
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env var).
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:param str id: The host name.
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:param dict body: example format {'host': {'status': 'enable',
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'maintenance_mode': 'enable'}}
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:return: Same dict as body but 'enable' strings for 'status' and
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'maintenance_mode' are converted into True, else False.
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:rtype: dict
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"""
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def read_enabled(orig_val):
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# Convert enable/disable str to a bool.
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val = orig_val.strip().lower()
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return val == "enable"
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context = req.environ['nova.context']
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context.can(hosts_policies.POLICY_NAME % 'update',
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target={})
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# See what the user wants to 'update'
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status = body.get('status')
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maint_mode = body.get('maintenance_mode')
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if status is not None:
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status = read_enabled(status)
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if maint_mode is not None:
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maint_mode = read_enabled(maint_mode)
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# Make the calls and merge the results
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result = {'host': id}
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if status is not None:
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result['status'] = self._set_enabled_status(context, id, status)
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if maint_mode is not None:
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result['maintenance_mode'] = self._set_host_maintenance(context,
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id,
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maint_mode)
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return result
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def _set_host_maintenance(self, context, host_name, mode=True):
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"""Start/Stop host maintenance window. On start, it triggers
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guest VMs evacuation.
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"""
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LOG.info("Putting host %(host_name)s in maintenance mode %(mode)s.",
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{'host_name': host_name, 'mode': mode})
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try:
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result = self.api.set_host_maintenance(context, host_name, mode)
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except NotImplementedError:
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common.raise_feature_not_supported()
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except (exception.HostNotFound, exception.HostMappingNotFound) as e:
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raise webob.exc.HTTPNotFound(explanation=e.format_message())
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except exception.ComputeServiceUnavailable as e:
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raise webob.exc.HTTPBadRequest(explanation=e.format_message())
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if result not in ("on_maintenance", "off_maintenance"):
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raise webob.exc.HTTPBadRequest(explanation=result)
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return result
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def _set_enabled_status(self, context, host_name, enabled):
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"""Sets the specified host's ability to accept new instances.
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:param enabled: a boolean - if False no new VMs will be able to start
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on the host.
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"""
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if enabled:
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LOG.info("Enabling host %s.", host_name)
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else:
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LOG.info("Disabling host %s.", host_name)
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try:
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result = self.api.set_host_enabled(context, host_name, enabled)
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except NotImplementedError:
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common.raise_feature_not_supported()
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except (exception.HostNotFound, exception.HostMappingNotFound) as e:
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raise webob.exc.HTTPNotFound(explanation=e.format_message())
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except exception.ComputeServiceUnavailable as e:
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raise webob.exc.HTTPBadRequest(explanation=e.format_message())
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if result not in ("enabled", "disabled"):
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raise webob.exc.HTTPBadRequest(explanation=result)
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return result
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def _host_power_action(self, req, host_name, action):
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"""Reboots, shuts down or powers up the host."""
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context = req.environ['nova.context']
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try:
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result = self.api.host_power_action(context, host_name, action)
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except NotImplementedError:
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common.raise_feature_not_supported()
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except (exception.HostNotFound, exception.HostMappingNotFound) as e:
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raise webob.exc.HTTPNotFound(explanation=e.format_message())
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except exception.ComputeServiceUnavailable as e:
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raise webob.exc.HTTPBadRequest(explanation=e.format_message())
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return {"host": host_name, "power_action": result}
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@wsgi.Controller.api_version("2.1", "2.42")
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@wsgi.expected_errors((400, 404, 501))
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def startup(self, req, id):
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context = req.environ['nova.context']
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context.can(hosts_policies.POLICY_NAME % 'start',
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target={})
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return self._host_power_action(req, host_name=id, action="startup")
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@wsgi.Controller.api_version("2.1", "2.42")
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@wsgi.expected_errors((400, 404, 501))
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def shutdown(self, req, id):
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context = req.environ['nova.context']
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context.can(hosts_policies.POLICY_NAME % 'shutdown',
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target={})
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return self._host_power_action(req, host_name=id, action="shutdown")
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@wsgi.Controller.api_version("2.1", "2.42")
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@wsgi.expected_errors((400, 404, 501))
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def reboot(self, req, id):
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context = req.environ['nova.context']
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context.can(hosts_policies.POLICY_NAME % 'reboot',
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target={})
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return self._host_power_action(req, host_name=id, action="reboot")
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@staticmethod
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def _get_total_resources(host_name, compute_node):
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return {'resource': {'host': host_name,
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'project': '(total)',
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'cpu': compute_node.vcpus,
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'memory_mb': compute_node.memory_mb,
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'disk_gb': compute_node.local_gb}}
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@staticmethod
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def _get_used_now_resources(host_name, compute_node):
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return {'resource': {'host': host_name,
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'project': '(used_now)',
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'cpu': compute_node.vcpus_used,
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'memory_mb': compute_node.memory_mb_used,
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'disk_gb': compute_node.local_gb_used}}
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@staticmethod
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def _get_resource_totals_from_instances(host_name, instances):
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cpu_sum = 0
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mem_sum = 0
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hdd_sum = 0
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for instance in instances:
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cpu_sum += instance['vcpus']
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mem_sum += instance['memory_mb']
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hdd_sum += instance['root_gb'] + instance['ephemeral_gb']
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return {'resource': {'host': host_name,
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'project': '(used_max)',
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'cpu': cpu_sum,
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'memory_mb': mem_sum,
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'disk_gb': hdd_sum}}
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@staticmethod
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def _get_resources_by_project(host_name, instances):
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# Getting usage resource per project
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project_map = {}
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for instance in instances:
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resource = project_map.setdefault(instance['project_id'],
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{'host': host_name,
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'project': instance['project_id'],
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'cpu': 0,
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'memory_mb': 0,
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'disk_gb': 0})
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resource['cpu'] += instance['vcpus']
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resource['memory_mb'] += instance['memory_mb']
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resource['disk_gb'] += (instance['root_gb'] +
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instance['ephemeral_gb'])
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return project_map
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@wsgi.Controller.api_version("2.1", "2.42")
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@wsgi.expected_errors(404)
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def show(self, req, id):
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"""Shows the physical/usage resource given by hosts.
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:param id: hostname
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:returns: expected to use HostShowTemplate.
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ex.::
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{'host': {'resource':D},..}
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D: {'host': 'hostname','project': 'admin',
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'cpu': 1, 'memory_mb': 2048, 'disk_gb': 30}
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"""
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context = req.environ['nova.context']
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context.can(hosts_policies.POLICY_NAME % 'show',
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target={})
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host_name = id
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try:
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mapping = objects.HostMapping.get_by_host(context, host_name)
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nova_context.set_target_cell(context, mapping.cell_mapping)
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compute_node = (
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objects.ComputeNode.get_first_node_by_host_for_old_compat(
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context, host_name))
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instances = self.api.instance_get_all_by_host(context, host_name)
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except (exception.ComputeHostNotFound,
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exception.HostMappingNotFound) as e:
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raise webob.exc.HTTPNotFound(explanation=e.format_message())
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resources = [self._get_total_resources(host_name, compute_node)]
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resources.append(self._get_used_now_resources(host_name,
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compute_node))
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resources.append(self._get_resource_totals_from_instances(host_name,
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instances))
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by_proj_resources = self._get_resources_by_project(host_name,
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instances)
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for resource in by_proj_resources.values():
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resources.append({'resource': resource})
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return {'host': resources}
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