Synnefo

#

# Copyright (c) 2010 Greek Research and Technology Network

#

from synnefo.api.errors import *

from synnefo.api.util import *

from synnefo.db.models import *

from synnefo.util.rapi import GanetiRapiClient

from django.conf.urls.defaults import *

from django.http import HttpResponse

from django.template.loader import render_to_string

from logging import getLogger

import json

log = getLogger('synnefo.api.servers')

rapi = GanetiRapiClient(*settings.GANETI_CLUSTER_INFO)

urlpatterns = patterns('synnefo.api.servers',

    (r'^(?:/|.json|.xml)?$', 'demux'),

    (r'^/detail(?:.json|.xml)?$', 'list_servers', {'detail': True}),

    (r'^/(\d+)(?:.json|.xml)?$', 'server_demux'),

)

def demux(request):

    if request.method == 'GET':

        return list_servers(request)

    elif request.method == 'POST':

        return create_server(request)

    else:

        return HttpResponse(status=404)

def server_demux(request, server_id):

    if request.method == 'GET':

        return get_server_details(request, server_id)

    elif request.method == 'PUT':

        return update_server_name(request, server_id)

    elif request.method == 'DELETE':

        return delete_server(request, server_id)

    else:

        return HttpResponse(status=404)

def server_dict(vm, detail=False):

    d = dict(id=vm.id, name=vm.name)

    if detail:

        d['status'] = vm.rsapi_state

        d['progress'] = 100 if vm.rsapi_state == 'ACTIVE' else 0

        d['hostId'] = vm.hostid

        d['updated'] = vm.updated.isoformat()

        d['created'] = vm.created.isoformat()

        d['flavorId'] = vm.flavor.id            # XXX Should use flavorRef instead?

        d['imageId'] = vm.sourceimage.id        # XXX Should use imageRef instead?

        d['description'] = vm.description       # XXX Not in OpenStack docs

        vm_meta = vm.virtualmachinemetadata_set.all()

        metadata = dict((meta.meta_key, meta.meta_value) for meta in vm_meta)

        if metadata:

            d['metadata'] = dict(values=metadata)

        public_addrs = [dict(version=4, addr=vm.ipfour), dict(version=6, addr=vm.ipsix)]

        d['addresses'] = {'values': []}

        d['addresses']['values'].append({'id': 'public', 'values': public_addrs})

    return d

def render_server(server, request, status=200):

    if request.type == 'xml':

        mimetype = 'application/xml'

        data = render_to_string('server.xml', dict(server=server, is_root=True))

    else:

        mimetype = 'application/json'

        data = json.dumps({'server': server})

    return HttpResponse(data, mimetype=mimetype, status=status)    

@api_method

def list_servers(request, detail=False):

    # Normal Response Codes: 200, 203

    # Error Response Codes: computeFault (400, 500),

    #                       serviceUnavailable (503),

    #                       unauthorized (401),

    #                       badRequest (400),

    #                       overLimit (413)

    owner = get_user()

    vms = VirtualMachine.objects.filter(owner=owner, deleted=False)

    servers = [server_dict(vm, detail) for vm in vms]

    if request.type == 'xml':

        mimetype = 'application/xml'

        data = render_to_string('list_servers.xml', dict(servers=servers, detail=detail))

    else:

        mimetype = 'application/json'

        data = json.dumps({'servers': servers})

    return HttpResponse(data, mimetype=mimetype, status=200)

@api_method

def create_server(request):

    # Normal Response Code: 202

    # Error Response Codes: computeFault (400, 500),

    #                       serviceUnavailable (503),

    #                       unauthorized (401),

    #                       badMediaType(415),

    #                       itemNotFound (404),

    #                       badRequest (400),

    #                       serverCapacityUnavailable (503),

    #                       overLimit (413)

    req = get_request_dict(request)

    try:

        server = req['server']

        name = server['name']

        sourceimage = Image.objects.get(id=server['imageId'])

        flavor = Flavor.objects.get(id=server['flavorId'])

    except KeyError:

        raise BadRequest

    except Image.DoesNotExist:

        raise ItemNotFound

    except Flavor.DoesNotExist:

        raise ItemNotFound

    vm = VirtualMachine.objects.create(

        name=name,

        owner=get_user(),

        sourceimage=sourceimage,

        ipfour='0.0.0.0',

        ipsix='::1',

        flavor=flavor)

    if request.META.get('SERVER_NAME', None) == 'testserver':

        name = 'test-server'

        dry_run = True

    else:

        name = vm.backend_id

        dry_run = False

    jobId = rapi.CreateInstance(

        mode='create',

        name=name,

        disk_template='plain',

        disks=[{"size": 2000}],         #FIXME: Always ask for a 2GB disk for now

        nics=[{}],

        os='debootstrap+default',       #TODO: select OS from imageId

        ip_check=False,

        nam_check=False,

        pnode=rapi.GetNodes()[0],       #TODO: verify if this is necessary

        dry_run=dry_run,

        beparams=dict(auto_balance=True, vcpus=flavor.cpu, memory=flavor.ram))

    vm.save()

    log.info('created vm with %s cpus, %s ram and %s storage' % (flavor.cpu, flavor.ram, flavor.disk))

    server = server_dict(vm, detail=True)

    server['status'] = 'BUILD'

    server['adminPass'] = random_password()

    return render_server(server, request, status=202)

@api_method

def get_server_details(request, server_id):

    try:

        vm = VirtualMachine.objects.get(id=int(server_id))

    except VirtualMachine.DoesNotExist:

        raise NotFound

    server = server_dict(vm, detail=True)

    return render_server(server, request)

@api_method

def update_server_name(request, server_id):    

    req = get_request_dict(request)

    try:

        name = req['server']['name']

        vm = VirtualMachine.objects.get(id=int(server_id))

    except KeyError:

        raise BadRequest

    except VirtualMachine.DoesNotExist:

        raise NotFound

    vm.name = name

    vm.save()

    return HttpResponse(status=204)

@api_method

def delete_server(request, server_id):

    try:

        vm = VirtualMachine.objects.get(id=int(server_id))

    except VirtualMachine.DoesNotExist:

        raise NotFound

    vm.start_action('DESTROY')

    rapi.DeleteInstance(vm.backend_id)

    vm.state = 'DESTROYED'

    vm.save()

    return HttpResponse(status=204)