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# Copyright (c) 2017-2018 Wind River Systems, Inc.
#
# 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 logging
import json
import traceback
from rest_framework import status
from django.conf import settings
from common.exceptions import VimDriverNewtonException
from newton_base.util import VimDriverUtils
from keystoneauth1.exceptions import HttpError
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from common.msapi import extsys
logger = logging.getLogger(__name__)
class CapacityCheck(APIView):
def __init__(self):
self._logger = logger
def post(self, request, vimid=""):
self._logger.info("CapacityCheck--post::vimid, data> %s, %s" % (vimid, request.data))
self._logger.debug("CapacityCheck--post::META> %s" % request.META)
hasEnoughResource = False
try :
resource_demand = request.data
#get token:
cloud_owner, regionid = extsys.decode_vim_id(vimid)
interface = 'public'
service = {'service_type': 'compute',
'interface': interface,
'region_id': regionid}
tenant_name = None
vim = VimDriverUtils.get_vim_info(vimid)
sess = VimDriverUtils.get_session(vim, tenant_name)
#get limit for this tenant
req_resouce = "/limits"
resp = sess.get(req_resouce, endpoint_filter=service)
content = resp.json()
compute_limits = content['limits']['absolute']
#get total resource of this cloud region
try:
req_resouce = "/os-hypervisors/statistics"
self._logger.info("check os-hypervisors statistics> URI:%s" % req_resouce)
resp = sess.get(req_resouce, endpoint_filter=service)
self._logger.info("check os-hypervisors statistics> status:%s" % resp.status_code)
content = resp.json()
hypervisor_statistics = content['hypervisor_statistics']
self._logger.debug("check os-hypervisors statistics> resp data:%s" % content)
except HttpError as e:
if e.http_status == status.HTTP_403_FORBIDDEN:
# Due to non administrator account cannot get hypervisor data,
# so construct enough resource data
conVCPUS = int(resource_demand['vCPU'])
conFreeRamMB = int(resource_demand['Memory'])
conFreeDiskGB = int(resource_demand['Storage'])
self._logger.info("Non administator forbidden to access hypervisor statistics data")
hypervisor_statistics = {'vcpus_used':0, 'vcpus':conVCPUS, 'free_ram_mb':conFreeRamMB, 'free_disk_gb':conFreeDiskGB}
else:
# non forbiden exeption will be redirected
raise e
#get storage limit for this tenant
service['service_type'] = 'volumev2'
req_resouce = "/limits"
resp = sess.get(req_resouce, endpoint_filter=service)
content = resp.json()
storage_limits = content['limits']['absolute']
# compute actual available resource for this tenant
remainVCPU = compute_limits['maxTotalCores'] - compute_limits['totalCoresUsed']
remainHypervisorVCPU = hypervisor_statistics['vcpus'] - hypervisor_statistics['vcpus_used']
if (remainVCPU > remainHypervisorVCPU):
remainVCPU = remainHypervisorVCPU
remainMEM = compute_limits['maxTotalRAMSize'] - compute_limits['totalRAMUsed']
remainHypervisorMEM = hypervisor_statistics['free_ram_mb']
if remainMEM > remainHypervisorMEM:
remainMEM = remainHypervisorMEM
remainStorage = storage_limits['maxTotalVolumeGigabytes'] - storage_limits['totalGigabytesUsed']
remainHypervisorStorage = hypervisor_statistics['free_disk_gb']
if (remainStorage > remainHypervisorStorage):
remainStorage = remainHypervisorStorage
# compare resource demanded with available
if (int(resource_demand['vCPU']) > remainVCPU):
hasEnoughResource = False
elif (int(resource_demand['Memory']) > remainMEM):
hasEnoughResource = False
elif (int(resource_demand['Storage']) > remainStorage):
hasEnoughResource = False
else:
hasEnoughResource = True
return Response(data={'result': hasEnoughResource}, status=status.HTTP_200_OK)
except VimDriverNewtonException as e:
return Response(data={'result': hasEnoughResource,'error': e.content}, status=e.status_code)
except HttpError as e:
self._logger.error("HttpError: status:%s, response:%s" % (e.http_status, e.response.json()))
resp = e.response.json()
resp.update({'result': hasEnoughResource})
return Response(data=e.response.json(), status=e.http_status)
except Exception as e:
self._logger.error(traceback.format_exc())
return Response(data={'result': hasEnoughResource, 'error': str(e)},
status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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