Synnefo

# Copyright 2011 GRNET S.A. All rights reserved.

#

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# without modification, are permitted provided that the following

# conditions are met:

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#   1. Redistributions of source code must retain the above

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#      disclaimer.

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#   2. Redistributions in binary form must reproduce the above

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#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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from functools import wraps

from logging import getLogger

from django.conf import settings

from django.http import HttpResponse

from django.shortcuts import redirect

from django.template.loader import render_to_string

from synnefo.db import models

from synnefo.logic import backend, users

log = getLogger('synnefo.admin')

def render(template, tab, **kwargs):

    kwargs.setdefault('tab', tab)

    return render_to_string(template, kwargs)

def requires_admin(func):

    @wraps(func)

    def wrapper(request, *args):

        if not request.user or request.user.type != 'ADMIN':

            return HttpResponse('Forbidden', status=403)

        return func(request, *args)

    return wrapper

def get_filters(request, session_key, all_filters, default=None):

    if default is None:

        default = all_filters

    filters = request.session.get(session_key, default)

    filter = request.GET.get('toggle_filter')

    if filter:

        if filter in filters:

            filters.remove(filter)

        elif filter in all_filters:

            filters.add(filter)

        request.session[session_key] = filters

    return filters

@requires_admin

def index(request):

    stats = {}

    stats['images'] = models.Image.objects.exclude(state='DELETED').count()

    stats['flavors'] = models.Flavor.objects.count()

    stats['vms'] = models.VirtualMachine.objects.filter(deleted=False).count()

    stats['networks'] = models.Network.objects.exclude(state='DELETED').count()

    stats['ganeti_instances'] = len(backend.get_ganeti_instances())

    stats['ganeti_nodes'] = len(backend.get_ganeti_nodes())

    stats['ganeti_jobs'] = len(backend.get_ganeti_jobs())

    images = []

    for image in models.Image.objects.exclude(state='DELETED'):

        vms = models.VirtualMachine.objects.filter(imageid=image.id)

        count = vms.filter(deleted=False).count()

        images.append((count, image.name))

    images.sort(reverse=True)

    html = render('index.html', 'home', stats=stats, images=images)

    return HttpResponse(html)

@requires_admin

def flavors_list(request):

    all_states = set(['DELETED'])

    default = set()

    filters = get_filters(request, 'flavors_filters', all_states, default)

    flavors = models.Flavor.objects.all()

    if 'DELETED' not in filters:

        flavors = flavors.exclude(deleted=True)

    html = render('flavors_list.html', 'flavors',

                    flavors=flavors,

                    all_states=sorted(all_states),

                    filters=filters)

    return HttpResponse(html)

@requires_admin

def flavors_create(request):

    if request.method == 'GET':

        html = render('flavors_create.html', 'flavors')

        return HttpResponse(html)

    if request.method == 'POST':

        flavor = models.Flavor()

        flavor.cpu = int(request.POST.get('cpu'))

        flavor.ram = int(request.POST.get('ram'))

        flavor.disk = int(request.POST.get('disk'))

        flavor.save()

        log.info('User %s created Flavor %s', request.user.name, flavor.name)

        return redirect(flavors_info, flavor.id)

@requires_admin

def flavors_info(request, flavor_id):

    flavor = models.Flavor.objects.get(id=flavor_id)

    html = render('flavors_info.html', 'flavors',

                    flavor=flavor,

                    disk_templates=settings.GANETI_DISK_TEMPLATES)

    return HttpResponse(html)

@requires_admin

def flavors_modify(request, flavor_id):

    flavor = models.Flavor.objects.get(id=flavor_id)

    flavor.cpu = int(request.POST.get('cpu'))

    flavor.ram = int(request.POST.get('ram'))

    flavor.disk = int(request.POST.get('disk'))

    flavor.disk_template = request.POST.get('disk_template')

    flavor.deleted = True if request.POST.get('deleted') else False

    flavor.save()

    log.info('User %s modified Flavor %s', request.user.name, flavor.name)

    return redirect(flavors_info, flavor.id)

@requires_admin

def flavors_delete(request, flavor_id):

    flavor = models.Flavor.objects.get(id=flavor_id)

    flavor.delete()

    log.info('User %s deleted Flavor %s', request.user.name, flavor.name)

    return redirect(flavors_list)

@requires_admin

def images_list(request):

    all_states = set(x[0] for x in models.Image.IMAGE_STATES)

    default = all_states - set(['DELETED'])

    filters = get_filters(request, 'images_filters', all_states, default)

    images = models.Image.objects.all()

    for state in all_states - filters:

        images = images.exclude(state=state)

    html = render('images_list.html', 'images',

                    images=images.order_by('id'),

                    all_states=sorted(all_states),

                    filters=filters)

    return HttpResponse(html)

@requires_admin

def images_register(request):

    if request.method == 'GET':

        formats = [x[0] for x in models.Image.FORMATS]

        html = render('images_register.html', 'images', formats=formats)

        return HttpResponse(html)

    elif request.method == 'POST':

        image = models.Image()

        image.state = 'ACTIVE'

        image.name = request.POST.get('name')

        image.userid = request.POST.get('owner')

        image.backend_id = request.POST.get('backend')

        image.format = request.POST.get('format')

        image.public = True if request.POST.get('public') else False

        image.save()

        log.info('User %s registered Image %s', request.user.name, image.name)

        return redirect(images_info, image.id)

@requires_admin

def images_info(request, image_id):

    image = models.Image.objects.get(id=image_id)

    states = [x[0] for x in models.Image.IMAGE_STATES]

    if not image.state:

        states = [''] + states

    formats = [x[0] for x in models.Image.FORMATS]

    if not image.format:

        formats = [''] + formats

    metadata = image.metadata.order_by('meta_key')

    html = render('images_info.html', 'images',

                    image=image,

                    states=states,

                    formats=formats,

                    metadata=metadata)

    return HttpResponse(html)

@requires_admin

def images_modify(request, image_id):

    image = models.Image.objects.get(id=image_id)

    image.name = request.POST.get('name')

    image.state = request.POST.get('state')

    image.userid = request.POST.get('owner')

    vm_id = request.POST.get('sourcevm')

    image.sourcevm = vm_id and models.VirtualMachine.objects.get(id=vm_id)

    image.backend_id = request.POST.get('backend')

    image.format = request.POST.get('format')

    image.public = True if request.POST.get('public') else False

    image.save()

    keys = request.POST.getlist('key')

    vals = request.POST.getlist('value')

    meta = dict(zip(keys, vals))

    image.metadata.all().delete()

    for key, val in meta.items():

        if key:

            image.metadata.create(meta_key=key, meta_value=val)

    log.info('User %s modified Image %s', request.user.name, image.name)

    return redirect(images_info, image.id)

@requires_admin

def servers_list(request):

    all_states = set(x[0] for x in models.VirtualMachine.OPER_STATES)

    default = all_states - set(['DESTROYED'])

    filters = get_filters(request, 'servers_filters', all_states, default)

    servers = models.VirtualMachine.objects.all()

    for state in all_states - filters:

        servers = servers.exclude(operstate=state)

    html = render('servers_list.html', 'servers',

                    servers=servers.order_by('id'),

                    all_states=sorted(all_states),

                    filters=filters)

    return HttpResponse(html)