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:

        fault = BadRequest()

        return render_fault(request, fault)

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:

        fault = BadRequest()

        return render_fault(request, fault)

def server_to_dict(server, detail=False):

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

    if detail:

        d['status'] = server.rsapi_state

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

        d['hostId'] = server.hostid

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

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

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

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

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

        server_meta = server.virtualmachinemetadata_set.all()

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

        if metadata:

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

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

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

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

    return d

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

    if request.type == 'xml':

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

    else:

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

    return HttpResponse(data, status=status)

@api_method('GET')

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()

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

    servers = [server_to_dict(server, detail) for server in user_servers]

    if request.type == 'xml':

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

    else:

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

    return HttpResponse(data, status=200)

@api_method('POST')

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

    server = 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 = server.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))

    server.save()

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

    serverdict = server_to_dict(server, detail=True)

    serverdict['status'] = 'BUILD'

    serverdict['adminPass'] = random_password()

    return render_server(request, serverdict, status=202)

@api_method('GET')

def get_server_details(request, server_id):

    # Normal Response Codes: 200, 203

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

    #                       serviceUnavailable (503),

    #                       unauthorized (401),

    #                       badRequest (400),

    #                       itemNotFound (404),

    #                       overLimit (413)

    try:

        server_id = int(server_id)

        server = VirtualMachine.objects.get(id=server_id)

    except VirtualMachine.DoesNotExist:

        raise ItemNotFound

    serverdict = server_to_dict(server, detail=True)

    return render_server(request, serverdict)

@api_method('PUT')

def update_server_name(request, server_id):

    # Normal Response Code: 204

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

    #                       serviceUnavailable (503),

    #                       unauthorized (401),

    #                       badRequest (400),

    #                       badMediaType(415),

    #                       itemNotFound (404),

    #                       buildInProgress (409),

    #                       overLimit (413)

    req = get_request_dict(request)

    try:

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

        server_id = int(server_id)

        server = VirtualMachine.objects.get(id=server_id)

    except KeyError:

        raise BadRequest

    except VirtualMachine.DoesNotExist:

        raise ItemNotFound

    server.name = name

    server.save()

    return HttpResponse(status=204)

@api_method('DELETE')

def delete_server(request, server_id):

    # Normal Response Codes: 204

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

    #                       serviceUnavailable (503),

    #                       unauthorized (401),

    #                       itemNotFound (404),

    #                       unauthorized (401),

    #                       buildInProgress (409),

    #                       overLimit (413)

    try:

        server_id = int(server_id)

        server = VirtualMachine.objects.get(id=server_id)

    except VirtualMachine.DoesNotExist:

        raise ItemNotFound

    server.start_action('DESTROY')

    rapi.DeleteInstance(server.backend_id)

    return HttpResponse(status=204)