root / api / servers.py @ 1c03e74e
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#
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# Copyright (c) 2010 Greek Research and Technology Network
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#
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from django.conf import settings |
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from django.conf.urls.defaults import patterns |
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from django.http import HttpResponse |
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from django.template.loader import render_to_string |
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from django.utils import simplejson as json |
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from synnefo.api.actions import server_actions |
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from synnefo.api.common import method_not_allowed |
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from synnefo.api.faults import BadRequest, ItemNotFound |
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from synnefo.api.util import * |
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from synnefo.db.models import Image, Flavor, VirtualMachine, VirtualMachineMetadata |
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from synnefo.logic.utils import get_rsapi_state |
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from synnefo.util.rapi import GanetiRapiClient |
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from synnefo.logic import backend |
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import logging |
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rapi = GanetiRapiClient(*settings.GANETI_CLUSTER_INFO) |
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urlpatterns = patterns('synnefo.api.servers',
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(r'^(?:/|.json|.xml)?$', 'demux'), |
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(r'^/detail(?:.json|.xml)?$', 'list_servers', {'detail': True}), |
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(r'^/(\d+)(?:.json|.xml)?$', 'server_demux'), |
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(r'^/(\d+)/action(?:.json|.xml)?$', 'server_action'), |
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(r'^/(\d+)/ips(?:.json|.xml)?$', 'list_addresses'), |
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(r'^/(\d+)/ips/(.+?)(?:.json|.xml)?$', 'list_addresses_by_network'), |
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(r'^/(\d+)/meta(?:.json|.xml)?$', 'metadata_demux'), |
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(r'^/(\d+)/meta/(.+?)(?:.json|.xml)?$', 'metadata_item_demux'), |
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) |
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def demux(request): |
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if request.method == 'GET': |
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return list_servers(request)
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elif request.method == 'POST': |
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return create_server(request)
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else:
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return method_not_allowed(request)
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def server_demux(request, server_id): |
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if request.method == 'GET': |
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return get_server_details(request, server_id)
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elif request.method == 'PUT': |
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return update_server_name(request, server_id)
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elif request.method == 'DELETE': |
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return delete_server(request, server_id)
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else:
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return method_not_allowed(request)
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def metadata_demux(request, server_id): |
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if request.method == 'GET': |
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return list_metadata(request, server_id)
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elif request.method == 'POST': |
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return update_metadata(request, server_id)
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else:
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return method_not_allowed(request)
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def metadata_item_demux(request, server_id, key): |
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if request.method == 'GET': |
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return get_metadata_item(request, server_id, key)
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elif request.method == 'PUT': |
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return create_metadata_item(request, server_id, key)
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elif request.method == 'DELETE': |
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return delete_metadata_item(request, server_id, key)
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else:
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return method_not_allowed(request)
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def address_to_dict(ipfour, ipsix): |
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return {'id': 'public', |
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'values': [{'version': 4, 'addr': ipfour}, {'version': 6, 'addr': ipsix}]} |
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def metadata_to_dict(vm): |
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vm_meta = vm.virtualmachinemetadata_set.all() |
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return dict((meta.meta_key, meta.meta_value) for meta in vm_meta) |
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def vm_to_dict(vm, detail=False): |
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d = dict(id=vm.id, name=vm.name)
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if detail:
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d['status'] = get_rsapi_state(vm)
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d['progress'] = 100 if get_rsapi_state(vm) == 'ACTIVE' else 0 |
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d['hostId'] = vm.hostid
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d['updated'] = isoformat(vm.updated)
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d['created'] = isoformat(vm.created)
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d['flavorRef'] = vm.flavor.id
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d['imageRef'] = vm.sourceimage.id
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metadata = metadata_to_dict(vm) |
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if metadata:
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d['metadata'] = {'values': metadata} |
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addresses = [address_to_dict(vm.ipfour, vm.ipsix)] |
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d['addresses'] = {'values': addresses} |
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return d
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def render_server(request, server, status=200): |
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if request.serialization == 'xml': |
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data = render_to_string('server.xml', {'server': server, 'is_root': True}) |
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else:
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data = json.dumps({'server': server})
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return HttpResponse(data, status=status)
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@api_method('GET') |
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def list_servers(request, detail=False): |
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# Normal Response Codes: 200, 203
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badRequest (400),
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# overLimit (413)
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owner = get_user() |
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since = isoparse(request.GET.get('changes-since'))
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if since:
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user_vms = VirtualMachine.objects.filter(updated__gt=since) |
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if not user_vms: |
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return HttpResponse(status=304) |
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else:
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user_vms = VirtualMachine.objects.filter(owner=owner, deleted=False)
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servers = [vm_to_dict(server, detail) for server in user_vms] |
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if request.serialization == 'xml': |
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data = render_to_string('list_servers.xml', {'servers': servers, 'detail': detail}) |
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else:
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data = json.dumps({'servers': {'values': servers}}) |
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return HttpResponse(data, status=200) |
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@api_method('POST') |
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def create_server(request): |
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# Normal Response Code: 202
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badMediaType(415),
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# itemNotFound (404),
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# badRequest (400),
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# serverCapacityUnavailable (503),
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# overLimit (413)
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req = get_request_dict(request) |
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try:
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server = req['server']
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name = server['name']
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metadata = server.get('metadata', {})
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assert isinstance(metadata, dict) |
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sourceimage = Image.objects.get(id=server['imageRef'])
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flavor = Flavor.objects.get(id=server['flavorRef'])
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except (KeyError, AssertionError): |
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raise BadRequest('Malformed request.') |
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except Image.DoesNotExist:
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raise ItemNotFound
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except Flavor.DoesNotExist:
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raise ItemNotFound
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vm = VirtualMachine( |
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name=name, |
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owner=get_user(), |
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sourceimage=sourceimage, |
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ipfour='0.0.0.0',
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ipsix='::1',
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flavor=flavor) |
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# Pick a random password for the VM.
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# FIXME: This must be passed to the Ganeti OS provider via CreateInstance()
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passwd = random_password() |
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# We *must* save the VM instance now,
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# so that it gets a vm.id and vm.backend_id is valid.
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vm.save() |
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if request.META.get('SERVER_NAME', None) == 'testserver': |
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backend_name = 'test-server'
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dry_run = True
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else:
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backend_name = vm.backend_id |
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dry_run = False
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try:
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jobId = rapi.CreateInstance( |
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mode='create',
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name=backend_name, |
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disk_template='plain',
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disks=[{"size": 2000}], #FIXME: Always ask for a 2GB disk for now |
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nics=[{}], |
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os='debootstrap+default', #TODO: select OS from imageRef |
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ip_check=False,
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name_check=False,
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pnode=rapi.GetNodes()[0], #TODO: verify if this is necessary |
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dry_run=dry_run, |
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beparams=dict(auto_balance=True, vcpus=flavor.cpu, memory=flavor.ram)) |
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except Exception, e: |
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vm.delete() |
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raise e
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for key, val in metadata.items(): |
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VirtualMachineMetadata.objects.create(meta_key=key, meta_value=val, vm=vm) |
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logging.info('created vm with %s cpus, %s ram and %s storage' % (flavor.cpu, flavor.ram, flavor.disk))
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server = vm_to_dict(vm, detail=True)
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server['status'] = 'BUILD' |
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server['adminPass'] = passwd
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return render_server(request, server, status=202) |
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@api_method('GET') |
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def get_server_details(request, server_id): |
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# Normal Response Codes: 200, 203
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badRequest (400),
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# itemNotFound (404),
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# overLimit (413)
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vm = get_vm(server_id) |
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server = vm_to_dict(vm, detail=True)
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return render_server(request, server)
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@api_method('PUT') |
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def update_server_name(request, server_id): |
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# Normal Response Code: 204
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badRequest (400),
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# badMediaType(415),
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# itemNotFound (404),
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# buildInProgress (409),
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# overLimit (413)
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req = get_request_dict(request) |
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try:
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name = req['server']['name'] |
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except KeyError: |
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raise BadRequest('Malformed request.') |
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vm = get_vm(server_id) |
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vm.name = name |
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vm.save() |
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return HttpResponse(status=204) |
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@api_method('DELETE') |
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def delete_server(request, server_id): |
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# Normal Response Codes: 204
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# itemNotFound (404),
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# unauthorized (401),
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# buildInProgress (409),
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# overLimit (413)
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vm = get_vm(server_id) |
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backend.start_action(vm, 'DESTROY')
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rapi.DeleteInstance(vm.backend_id) |
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return HttpResponse(status=204) |
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@api_method('POST') |
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def server_action(request, server_id): |
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vm = get_vm(server_id) |
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req = get_request_dict(request) |
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if len(req) != 1: |
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raise BadRequest('Malformed request.') |
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key = req.keys()[0]
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val = req[key] |
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try:
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assert isinstance(val, dict) |
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return server_actions[key](request, vm, req[key])
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except KeyError: |
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raise BadRequest('Unknown action.') |
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except AssertionError: |
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raise BadRequest('Invalid argument.') |
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@api_method('GET') |
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def list_addresses(request, server_id): |
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# Normal Response Codes: 200, 203
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badRequest (400),
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# overLimit (413)
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vm = get_vm(server_id) |
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addresses = [address_to_dict(vm.ipfour, vm.ipsix)] |
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if request.serialization == 'xml': |
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data = render_to_string('list_addresses.xml', {'addresses': addresses}) |
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else:
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data = json.dumps({'addresses': {'values': addresses}}) |
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return HttpResponse(data, status=200) |
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@api_method('GET') |
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def list_addresses_by_network(request, server_id, network_id): |
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# Normal Response Codes: 200, 203
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badRequest (400),
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# itemNotFound (404),
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# overLimit (413)
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vm = get_vm(server_id) |
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if network_id != 'public': |
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raise ItemNotFound('Unknown network.') |
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address = address_to_dict(vm.ipfour, vm.ipsix) |
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if request.serialization == 'xml': |
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data = render_to_string('address.xml', {'address': address}) |
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else:
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data = json.dumps({'network': address})
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return HttpResponse(data, status=200) |
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@api_method('GET') |
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def list_metadata(request, server_id): |
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# Normal Response Codes: 200, 203
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badRequest (400),
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# overLimit (413)
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vm = get_vm(server_id) |
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metadata = metadata_to_dict(vm) |
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return render_metadata(request, metadata, use_values=True, status=200) |
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@api_method('POST') |
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def update_metadata(request, server_id): |
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# Normal Response Code: 201
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# badRequest (400),
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# buildInProgress (409),
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# badMediaType(415),
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# overLimit (413)
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vm = get_vm(server_id) |
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req = get_request_dict(request) |
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try:
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metadata = req['metadata']
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assert isinstance(metadata, dict) |
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except (KeyError, AssertionError): |
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raise BadRequest('Malformed request.') |
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updated = {} |
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for key, val in metadata.items(): |
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try:
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meta = VirtualMachineMetadata.objects.get(meta_key=key, vm=vm) |
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meta.meta_value = val |
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meta.save() |
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updated[key] = val |
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except VirtualMachineMetadata.DoesNotExist:
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pass # Ignore non-existent metadata |
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return render_metadata(request, metadata, status=201) |
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@api_method('GET') |
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def get_metadata_item(request, server_id, key): |
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# Normal Response Codes: 200, 203
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# itemNotFound (404),
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# badRequest (400),
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# overLimit (413)
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meta = get_vm_meta(server_id, key) |
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return render_meta(request, meta, status=200) |
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@api_method('PUT') |
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def create_metadata_item(request, server_id, key): |
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# Normal Response Code: 201
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# itemNotFound (404),
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# badRequest (400),
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# buildInProgress (409),
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# badMediaType(415),
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# overLimit (413)
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vm = get_vm(server_id) |
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req = get_request_dict(request) |
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try:
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metadict = req['meta']
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assert isinstance(metadict, dict) |
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assert len(metadict) == 1 |
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assert key in metadict |
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except (KeyError, AssertionError): |
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raise BadRequest('Malformed request.') |
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meta, created = VirtualMachineMetadata.objects.get_or_create(meta_key=key, vm=vm) |
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meta.meta_value = metadict[key] |
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meta.save() |
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return render_meta(request, meta, status=201) |
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@api_method('DELETE') |
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def delete_metadata_item(request, server_id, key): |
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# Normal Response Code: 204
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# Error Response Codes: computeFault (400, 500),
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# serviceUnavailable (503),
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# unauthorized (401),
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# itemNotFound (404),
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# badRequest (400),
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# buildInProgress (409),
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# badMediaType(415),
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# overLimit (413),
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meta = get_vm_meta(server_id, key) |
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meta.delete() |
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return HttpResponse(status=204) |