Dan Smith
6bc1da04c7
This adds service records for the API services for the purpose of version-tracking. Unlike other services, these records are not periodically updated, so this adds no additional runtime database burden. The API services update the version (if necessary) of their record at startup. This also adds filtering in three places to prevent us from exposing API service records out of the hosts and availability-zone APIs. Related to blueprint service-version-behavior Change-Id: I66becb14788de42bee35064d1155dd919059bcb7
304 lines
12 KiB
Python
304 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 six
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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 extensions
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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 import compute
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from nova import exception
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from nova.i18n import _LI
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from nova import objects
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LOG = logging.getLogger(__name__)
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ALIAS = 'os-hosts'
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authorize = extensions.os_compute_authorizer(ALIAS)
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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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self.api = compute.HostAPI()
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super(HostController, self).__init__()
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@extensions.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': 'console1.host.com',
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| 'service': 'consoleauth',
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| 'zone': 'internal'},
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| {'host_name': 'network1.host.com',
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| 'service': 'network',
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| 'zone': 'internal'},
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| {'host_name': 'netwwork2.host.com',
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| 'service': 'network',
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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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authorize(context)
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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)
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hosts = []
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api_services = ('nova-osapi_compute', 'nova-ec2', '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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@extensions.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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authorize(context)
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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(_LI("Putting host %(host_name)s in maintenance mode "
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"%(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 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(_LI("Enabling host %s."), host_name)
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else:
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LOG.info(_LI("Disabling host %s."), host_name)
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try:
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result = self.api.set_host_enabled(context, host_name=host_name,
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enabled=enabled)
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except NotImplementedError:
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common.raise_feature_not_supported()
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except exception.HostNotFound 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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authorize(context)
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try:
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result = self.api.host_power_action(context, host_name=host_name,
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action=action)
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except NotImplementedError:
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common.raise_feature_not_supported()
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except exception.HostNotFound 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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@extensions.expected_errors((400, 404, 501))
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def startup(self, req, id):
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return self._host_power_action(req, host_name=id, action="startup")
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@extensions.expected_errors((400, 404, 501))
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def shutdown(self, req, id):
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return self._host_power_action(req, host_name=id, action="shutdown")
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@extensions.expected_errors((400, 404, 501))
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def reboot(self, req, id):
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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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@extensions.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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authorize(context)
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host_name = id
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try:
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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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except exception.ComputeHostNotFound as e:
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raise webob.exc.HTTPNotFound(explanation=e.format_message())
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instances = self.api.instance_get_all_by_host(context, host_name)
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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 six.itervalues(by_proj_resources):
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resources.append({'resource': resource})
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return {'host': resources}
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class Hosts(extensions.V21APIExtensionBase):
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"""Admin-only host administration."""
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name = "Hosts"
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alias = ALIAS
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version = 1
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def get_resources(self):
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resources = [extensions.ResourceExtension(ALIAS,
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HostController(),
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member_actions={"startup": "GET", "shutdown": "GET",
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"reboot": "GET"})]
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return resources
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def get_controller_extensions(self):
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return []
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