143 lines
4.7 KiB
Python
143 lines
4.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 IBM
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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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from oslo.config import cfg
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import webob.exc
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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.openstack import xmlutil
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from nova import availability_zones
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from nova import db
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from nova import exception
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from nova.openstack.common import log as logging
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from nova.openstack.common import timeutils
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from nova import utils
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LOG = logging.getLogger(__name__)
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authorize = extensions.extension_authorizer('compute', 'services')
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CONF = cfg.CONF
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CONF.import_opt('service_down_time', 'nova.service')
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class ServicesIndexTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('services')
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elem = xmlutil.SubTemplateElement(root, 'service', selector='services')
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elem.set('binary')
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elem.set('host')
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elem.set('zone')
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elem.set('status')
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elem.set('state')
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elem.set('update_at')
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return xmlutil.MasterTemplate(root, 1)
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class ServicesUpdateTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('host')
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root.set('host')
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root.set('service')
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root.set('disabled')
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return xmlutil.MasterTemplate(root, 1)
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class ServiceController(object):
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@wsgi.serializers(xml=ServicesIndexTemplate)
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def index(self, req):
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"""
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Return a list of all running services. Filter by host & service name.
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"""
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context = req.environ['nova.context']
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authorize(context)
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now = timeutils.utcnow()
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services = db.service_get_all(context)
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services = availability_zones.set_availability_zones(context, services)
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host = ''
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if 'host' in req.GET:
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host = req.GET['host']
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service = ''
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if 'service' in req.GET:
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service = req.GET['service']
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if host:
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services = [s for s in services if s['host'] == host]
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if service:
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services = [s for s in services if s['binary'] == service]
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svcs = []
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for svc in services:
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delta = now - (svc['updated_at'] or svc['created_at'])
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alive = abs(utils.total_seconds(delta)) <= CONF.service_down_time
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art = (alive and "up") or "down"
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active = 'enabled'
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if svc['disabled']:
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active = 'disabled'
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svcs.append({"binary": svc['binary'], 'host': svc['host'],
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'zone': svc['availability_zone'],
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'status': active, 'state': art,
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'updated_at': svc['updated_at']})
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return {'services': svcs}
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@wsgi.serializers(xml=ServicesUpdateTemplate)
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def update(self, req, id, body):
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"""Enable/Disable scheduling for a service."""
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context = req.environ['nova.context']
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authorize(context)
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if id == "enable":
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disabled = False
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elif id == "disable":
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disabled = True
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else:
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raise webob.exc.HTTPNotFound("Unknown action")
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try:
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host = body['host']
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service = body['service']
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except (TypeError, KeyError):
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raise webob.exc.HTTPUnprocessableEntity()
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try:
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svc = db.service_get_by_args(context, host, service)
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if not svc:
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raise webob.exc.HTTPNotFound('Unknown service')
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db.service_update(context, svc['id'], {'disabled': disabled})
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except exception.ServiceNotFound:
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raise webob.exc.HTTPNotFound("service not found")
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return {'host': host, 'service': service, 'disabled': disabled}
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class Services(extensions.ExtensionDescriptor):
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"""Services support."""
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name = "Services"
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alias = "os-services"
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namespace = "http://docs.openstack.org/compute/ext/services/api/v2"
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updated = "2012-10-28T00:00:00-00:00"
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def get_resources(self):
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resources = []
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resource = extensions.ResourceExtension('os-services',
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ServiceController())
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resources.append(resource)
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return resources
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