265 lines
10 KiB
Python
265 lines
10 KiB
Python
# Copyright 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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import datetime
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import urlparse
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from webob import exc
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from nova.api.openstack import extensions
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from nova.compute import api
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from nova.compute import flavors
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from nova import exception
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from nova.openstack.common.gettextutils import _
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from nova.openstack.common import timeutils
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ALIAS = 'os-simple-tenant-usage'
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authorize_show = extensions.extension_authorizer('compute',
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'v3:' + ALIAS + ':show')
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authorize_list = extensions.extension_authorizer('compute',
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'v3:' + ALIAS + ':list')
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VALID_DATETIME_FORMAT = ["%Y-%m-%dT%H:%M:%S", "%Y-%m-%dT%H:%M:%S.%f",
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"%Y-%m-%d %H:%M:%S.%f"]
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class SimpleTenantUsageController(object):
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def _hours_for(self, instance, period_start, period_stop):
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launched_at = instance['launched_at']
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terminated_at = instance['terminated_at']
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if terminated_at is not None:
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if not isinstance(terminated_at, datetime.datetime):
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terminated_at = timeutils.parse_strtime(terminated_at,
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"%Y-%m-%d %H:%M:%S.%f")
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if launched_at is not None:
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if not isinstance(launched_at, datetime.datetime):
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launched_at = timeutils.parse_strtime(launched_at,
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"%Y-%m-%d %H:%M:%S.%f")
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if terminated_at and terminated_at < period_start:
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return 0
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# nothing if it started after the usage report ended
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if launched_at and launched_at > period_stop:
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return 0
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if launched_at:
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# if instance launched after period_started, don't charge for first
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start = max(launched_at, period_start)
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if terminated_at:
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# if instance stopped before period_stop, don't charge after
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stop = min(period_stop, terminated_at)
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else:
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# instance is still running, so charge them up to current time
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stop = period_stop
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dt = stop - start
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seconds = (dt.days * 3600 * 24 + dt.seconds +
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dt.microseconds / 100000.0)
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return seconds / 3600.0
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else:
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# instance hasn't launched, so no charge
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return 0
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def _get_flavor(self, context, compute_api, instance, flavors_cache):
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"""Get flavor information from the instance's system_metadata,
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allowing a fallback to lookup by-id for deleted instances only.
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"""
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try:
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return flavors.extract_flavor(instance)
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except KeyError:
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if not instance['deleted']:
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# Only support the fallback mechanism for deleted instances
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# that would have been skipped by migration #153
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raise
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flavor_type = instance['instance_type_id']
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if flavor_type in flavors_cache:
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return flavors_cache[flavor_type]
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try:
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it_ref = compute_api.get_instance_type(context, flavor_type)
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flavors_cache[flavor_type] = it_ref
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except exception.FlavorNotFound:
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# can't bill if there is no instance type
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it_ref = None
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return it_ref
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def _tenant_usages_for_period(self, context, period_start,
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period_stop, tenant_id=None, detailed=True):
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compute_api = api.API()
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instances = compute_api.get_active_by_window(context,
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period_start,
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period_stop,
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tenant_id)
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rval = {}
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flavors = {}
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for instance in instances:
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info = {}
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info['hours'] = self._hours_for(instance,
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period_start,
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period_stop)
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flavor = self._get_flavor(context, compute_api, instance, flavors)
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if not flavor:
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continue
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info['instance_id'] = instance['uuid']
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info['name'] = instance['display_name']
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info['memory_mb'] = flavor['memory_mb']
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info['local_gb'] = flavor['root_gb'] + flavor['ephemeral_gb']
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info['vcpus'] = flavor['vcpus']
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info['tenant_id'] = instance['project_id']
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info['flavor'] = flavor['name']
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info['started_at'] = instance['launched_at']
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info['ended_at'] = instance['terminated_at']
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if info['ended_at']:
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info['state'] = 'terminated'
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else:
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info['state'] = instance['vm_state']
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now = timeutils.utcnow()
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if info['state'] == 'terminated':
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delta = info['ended_at'] - info['started_at']
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else:
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delta = now - info['started_at']
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info['uptime'] = delta.days * 24 * 3600 + delta.seconds
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if info['tenant_id'] not in rval:
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summary = {}
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summary['tenant_id'] = info['tenant_id']
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if detailed:
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summary['server_usages'] = []
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summary['total_local_gb_usage'] = 0
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summary['total_vcpus_usage'] = 0
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summary['total_memory_mb_usage'] = 0
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summary['total_hours'] = 0
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summary['start'] = period_start
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summary['stop'] = period_stop
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rval[info['tenant_id']] = summary
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summary = rval[info['tenant_id']]
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summary['total_local_gb_usage'] += info['local_gb'] * info['hours']
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summary['total_vcpus_usage'] += info['vcpus'] * info['hours']
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summary['total_memory_mb_usage'] += (info['memory_mb'] *
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info['hours'])
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summary['total_hours'] += info['hours']
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if detailed:
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summary['server_usages'].append(info)
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return rval.values()
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def _parse_datetime(self, dtstr):
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if not dtstr:
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return timeutils.utcnow()
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elif isinstance(dtstr, datetime.datetime):
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return dtstr
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for format in VALID_DATETIME_FORMAT:
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try:
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return timeutils.parse_strtime(dtstr, format)
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except ValueError:
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continue
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return None
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def _get_datetime_range(self, req):
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qs = req.environ.get('QUERY_STRING', '')
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env = urlparse.parse_qs(qs)
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# NOTE(lzyeval): env.get() always returns a list
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period_start = self._parse_datetime(env.get('start', [None])[0])
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if not period_start:
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msg = _("Start time is invalid format, valid "
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"formats are %s") % VALID_DATETIME_FORMAT
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raise exc.HTTPBadRequest(explanation=msg)
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period_stop = self._parse_datetime(env.get('end', [None])[0])
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if not period_stop:
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msg = _("Stop time is invalid format, valid "
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"formats are %s") % VALID_DATETIME_FORMAT
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raise exc.HTTPBadRequest(explanation=msg)
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if not period_start < period_stop:
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msg = _("Invalid start time. The start time cannot occur after "
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"the end time.")
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raise exc.HTTPBadRequest(explanation=msg)
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detailed = env.get('detailed', ['0'])[0] == '1'
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return (period_start, period_stop, detailed)
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@extensions.expected_errors(400)
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def index(self, req):
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"""Retrieve tenant_usage for all tenants."""
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context = req.environ['nova.context']
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authorize_list(context)
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(period_start, period_stop, detailed) = self._get_datetime_range(req)
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now = timeutils.utcnow()
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if period_stop > now:
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period_stop = now
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usages = self._tenant_usages_for_period(context,
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period_start,
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period_stop,
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detailed=detailed)
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return {'tenant_usages': usages}
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@extensions.expected_errors(400)
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def show(self, req, id):
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"""Retrieve tenant_usage for a specified tenant."""
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tenant_id = id
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context = req.environ['nova.context']
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authorize_show(context, {'project_id': tenant_id})
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(period_start, period_stop, ignore) = self._get_datetime_range(req)
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now = timeutils.utcnow()
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if period_stop > now:
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period_stop = now
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usage = self._tenant_usages_for_period(context,
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period_start,
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period_stop,
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tenant_id=tenant_id,
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detailed=True)
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if len(usage):
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usage = usage[0]
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else:
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usage = {}
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return {'tenant_usage': usage}
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class SimpleTenantUsage(extensions.V3APIExtensionBase):
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"""Simple tenant usage extension."""
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name = "SimpleTenantUsage"
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alias = ALIAS
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version = 1
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def get_resources(self):
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res = [extensions.ResourceExtension('os-simple-tenant-usage',
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SimpleTenantUsageController())]
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return res
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def get_controller_extensions(self):
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"""It's an abstract function V3APIExtensionBase and the extension
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will not be loaded without it.
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"""
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return []
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