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# Copyright 2011 OpenStack Foundation
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import datetime
import iso8601
import six.moves.urllib.parse as urlparse
from webob import exc
from nova.api.openstack import extensions
from nova.api.openstack import wsgi
from nova.api.openstack import xmlutil
from nova import exception
from nova import objects
from nova.objects import flavor as flavor_obj
from nova.objects import instance as instance_obj
from nova.openstack.common.gettextutils import _
from nova.openstack.common import timeutils
authorize_show = extensions.extension_authorizer('compute',
'simple_tenant_usage:show')
authorize_list = extensions.extension_authorizer('compute',
'simple_tenant_usage:list')
def make_usage(elem):
for subelem_tag in ('tenant_id', 'total_local_gb_usage',
'total_vcpus_usage', 'total_memory_mb_usage',
'total_hours', 'start', 'stop'):
subelem = xmlutil.SubTemplateElement(elem, subelem_tag)
subelem.text = subelem_tag
server_usages = xmlutil.SubTemplateElement(elem, 'server_usages')
server_usage = xmlutil.SubTemplateElement(server_usages, 'server_usage',
selector='server_usages')
for subelem_tag in ('instance_id', 'name', 'hours', 'memory_mb',
'local_gb', 'vcpus', 'tenant_id', 'flavor',
'started_at', 'ended_at', 'state', 'uptime'):
subelem = xmlutil.SubTemplateElement(server_usage, subelem_tag)
subelem.text = subelem_tag
def parse_strtime(dstr, fmt):
try:
return timeutils.parse_strtime(dstr, fmt)
except (TypeError, ValueError) as e:
raise exception.InvalidStrTime(reason=unicode(e))
class SimpleTenantUsageTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('tenant_usage', selector='tenant_usage')
make_usage(root)
return xmlutil.MasterTemplate(root, 1)
class SimpleTenantUsagesTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('tenant_usages')
elem = xmlutil.SubTemplateElement(root, 'tenant_usage',
selector='tenant_usages')
make_usage(elem)
return xmlutil.MasterTemplate(root, 1)
class SimpleTenantUsageController(object):
def _hours_for(self, instance, period_start, period_stop):
launched_at = instance.launched_at
terminated_at = instance.terminated_at
if terminated_at is not None:
if not isinstance(terminated_at, datetime.datetime):
# NOTE(mriedem): Instance object DateTime fields are
# timezone-aware so convert using isotime.
terminated_at = timeutils.parse_isotime(terminated_at)
if launched_at is not None:
if not isinstance(launched_at, datetime.datetime):
launched_at = timeutils.parse_isotime(launched_at)
if terminated_at and terminated_at < period_start:
return 0
# nothing if it started after the usage report ended
if launched_at and launched_at > period_stop:
return 0
if launched_at:
# if instance launched after period_started, don't charge for first
start = max(launched_at, period_start)
if terminated_at:
# if instance stopped before period_stop, don't charge after
stop = min(period_stop, terminated_at)
else:
# instance is still running, so charge them up to current time
stop = period_stop
dt = stop - start
seconds = (dt.days * 3600 * 24 + dt.seconds +
dt.microseconds / 100000.0)
return seconds / 3600.0
else:
# instance hasn't launched, so no charge
return 0
def _get_flavor(self, context, instance, flavors_cache):
"""Get flavor information from the instance's system_metadata,
allowing a fallback to lookup by-id for deleted instances only.
"""
try:
return instance.get_flavor()
except KeyError:
if not instance.deleted:
# Only support the fallback mechanism for deleted instances
# that would have been skipped by migration #153
raise
flavor_type = instance.instance_type_id
if flavor_type in flavors_cache:
return flavors_cache[flavor_type]
try:
flavor_ref = flavor_obj.Flavor.get_by_id(context, flavor_type)
flavors_cache[flavor_type] = flavor_ref
except exception.FlavorNotFound:
# can't bill if there is no flavor
flavor_ref = None
return flavor_ref
def _tenant_usages_for_period(self, context, period_start,
period_stop, tenant_id=None, detailed=True):
instances = objects.InstanceList.get_active_by_window_joined(
context, period_start, period_stop, tenant_id,
expected_attrs=instance_obj.INSTANCE_DEFAULT_FIELDS)
rval = {}
flavors = {}
for instance in instances:
info = {}
info['hours'] = self._hours_for(instance,
period_start,
period_stop)
flavor = self._get_flavor(context, instance, flavors)
if not flavor:
info['flavor'] = ''
else:
info['flavor'] = flavor.name
info['instance_id'] = instance.uuid
info['name'] = instance.display_name
info['memory_mb'] = instance.memory_mb
info['local_gb'] = instance.root_gb + instance.ephemeral_gb
info['vcpus'] = instance.vcpus
info['tenant_id'] = instance.project_id
# NOTE(mriedem): We need to normalize the start/end times back
# to timezone-naive so the response doesn't change after the
# conversion to objects.
info['started_at'] = timeutils.normalize_time(instance.launched_at)
info['ended_at'] = (
timeutils.normalize_time(instance.terminated_at) if
instance.terminated_at else None)
if info['ended_at']:
info['state'] = 'terminated'
else:
info['state'] = instance.vm_state
now = timeutils.utcnow()
if info['state'] == 'terminated':
delta = info['ended_at'] - info['started_at']
else:
delta = now - info['started_at']
info['uptime'] = delta.days * 24 * 3600 + delta.seconds
if info['tenant_id'] not in rval:
summary = {}
summary['tenant_id'] = info['tenant_id']
if detailed:
summary['server_usages'] = []
summary['total_local_gb_usage'] = 0
summary['total_vcpus_usage'] = 0
summary['total_memory_mb_usage'] = 0
summary['total_hours'] = 0
summary['start'] = timeutils.normalize_time(period_start)
summary['stop'] = timeutils.normalize_time(period_stop)
rval[info['tenant_id']] = summary
summary = rval[info['tenant_id']]
summary['total_local_gb_usage'] += info['local_gb'] * info['hours']
summary['total_vcpus_usage'] += info['vcpus'] * info['hours']
summary['total_memory_mb_usage'] += (info['memory_mb'] *
info['hours'])
summary['total_hours'] += info['hours']
if detailed:
summary['server_usages'].append(info)
return rval.values()
def _parse_datetime(self, dtstr):
if not dtstr:
value = timeutils.utcnow()
elif isinstance(dtstr, datetime.datetime):
value = dtstr
for fmt in ["%Y-%m-%dT%H:%M:%S",
"%Y-%m-%dT%H:%M:%S.%f",
"%Y-%m-%d %H:%M:%S.%f"]:
try:
value = parse_strtime(dtstr, fmt)
break
except exception.InvalidStrTime:
pass
else:
msg = _("Datetime is in invalid format")
raise exception.InvalidStrTime(reason=msg)
# NOTE(mriedem): Instance object DateTime fields are timezone-aware
# so we have to force UTC timezone for comparing this datetime against
# instance object fields and still maintain backwards compatibility
# in the API.
if value.utcoffset() is None:
value = value.replace(tzinfo=iso8601.iso8601.Utc())
return value
def _get_datetime_range(self, req):
qs = req.environ.get('QUERY_STRING', '')
env = urlparse.parse_qs(qs)
# NOTE(lzyeval): env.get() always returns a list
period_start = self._parse_datetime(env.get('start', [None])[0])
period_stop = self._parse_datetime(env.get('end', [None])[0])
if not period_start < period_stop:
msg = _("Invalid start time. The start time cannot occur after "
"the end time.")
raise exc.HTTPBadRequest(explanation=msg)
detailed = env.get('detailed', ['0'])[0] == '1'
return (period_start, period_stop, detailed)
@wsgi.serializers(xml=SimpleTenantUsagesTemplate)
def index(self, req):
"""Retrieve tenant_usage for all tenants."""
context = req.environ['nova.context']
authorize_list(context)
try:
(period_start, period_stop, detailed) = self._get_datetime_range(
req)
except exception.InvalidStrTime as e:
raise exc.HTTPBadRequest(explanation=e.format_message())
now = timeutils.parse_isotime(timeutils.strtime())
if period_stop > now:
period_stop = now
usages = self._tenant_usages_for_period(context,
period_start,
period_stop,
detailed=detailed)
return {'tenant_usages': usages}
@wsgi.serializers(xml=SimpleTenantUsageTemplate)
def show(self, req, id):
"""Retrieve tenant_usage for a specified tenant."""
tenant_id = id
context = req.environ['nova.context']
authorize_show(context, {'project_id': tenant_id})
try:
(period_start, period_stop, ignore) = self._get_datetime_range(
req)
except exception.InvalidStrTime as e:
raise exc.HTTPBadRequest(explanation=e.format_message())
now = timeutils.parse_isotime(timeutils.strtime())
if period_stop > now:
period_stop = now
usage = self._tenant_usages_for_period(context,
period_start,
period_stop,
tenant_id=tenant_id,
detailed=True)
if len(usage):
usage = usage[0]
else:
usage = {}
return {'tenant_usage': usage}
class Simple_tenant_usage(extensions.ExtensionDescriptor):
"""Simple tenant usage extension."""
name = "SimpleTenantUsage"
alias = "os-simple-tenant-usage"
namespace = ("http://docs.openstack.org/compute/ext/"
"os-simple-tenant-usage/api/v1.1")
updated = "2011-08-19T00:00:00Z"
def get_resources(self):
resources = []
res = extensions.ResourceExtension('os-simple-tenant-usage',
SimpleTenantUsageController())
resources.append(res)
return resources
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