def interfaces(request, compute_id):
"""
:param request:
:param compute_id:
:return:
"""
ifaces_all = []
compute = get_object_or_404(Compute, pk=compute_id)
try:
conn = wvmInterfaces(compute.hostname, compute.login, compute.password, compute.type)
ifaces = conn.get_ifaces()
try:
netdevs = conn.get_net_devices()
except:
netdevs = ["eth0", "eth1"]
for iface in ifaces:
interf = wvmInterface(compute.hostname, compute.login, compute.password, compute.type, iface)
ifaces_all.append(interf.get_details())
if request.method == "POST":
if "create" in request.POST:
form = AddInterface(request.POST)
if form.is_valid():
data = form.cleaned_data
conn.create_iface(
data["name"],
data["itype"],
data["start_mode"],
data["netdev"],
data["ipv4_type"],
data["ipv4_addr"],
data["ipv4_gw"],
data["ipv6_type"],
data["ipv6_addr"],
data["ipv6_gw"],
data["stp"],
data["delay"],
)
return HttpResponseRedirect(request.get_full_path())
else:
for msg_err in form.errors.values():
messages.error(request, msg_err.as_text())
conn.close()
except libvirtError as lib_err:
messages.error(request, lib_err)
return render(request, "interfaces.html", locals())
def interfaces(request, compute_id):
"""
:param request:
:return:
"""
if not request.user.is_authenticated():
return HttpResponseRedirect(reverse('index'))
if not request.user.is_superuser:
return HttpResponseRedirect(reverse('index'))
ifaces_all = []
error_messages = []
compute = get_object_or_404(Compute, pk=compute_id)
try:
conn = wvmInterfaces(compute.hostname, compute.login, compute.password,
compute.type)
ifaces = conn.get_ifaces()
try:
netdevs = conn.get_net_device()
except:
netdevs = ['eth0', 'eth1']
for iface in ifaces:
ifaces_all.append(conn.get_iface_info(iface))
if request.method == 'POST':
if 'create' in request.POST:
form = AddInterface(request.POST)
if form.is_valid():
data = form.cleaned_data
conn.create_iface(data['name'], data['itype'],
data['start_mode'], data['netdev'],
data['ipv4_type'], data['ipv4_addr'],
data['ipv4_gw'], data['ipv6_type'],
data['ipv6_addr'], data['ipv6_gw'],
data['stp'], data['delay'])
return HttpResponseRedirect(request.get_full_path())
else:
for msg_err in form.errors.values():
error_messages.append(msg_err.as_text())
conn.close()
except libvirtError as lib_err:
error_messages.append(lib_err)
return render(request, 'interfaces.html', locals())
def interfaces(request, compute_id):
"""
:param request:
:return:
"""
if not request.user.is_authenticated():
return HttpResponseRedirect(reverse('index'))
if not request.user.is_superuser:
return HttpResponseRedirect(reverse('index'))
ifaces_all = []
error_messages = []
compute = get_object_or_404(Compute, pk=compute_id)
try:
conn = wvmInterfaces(compute.hostname,
compute.login,
compute.password,
compute.type)
ifaces = conn.get_ifaces()
try:
netdevs = conn.get_net_device()
except:
netdevs = ['eth0', 'eth1']
for iface in ifaces:
ifaces_all.append(conn.get_iface_info(iface))
if request.method == 'POST':
if 'create' in request.POST:
form = AddInterface(request.POST)
if form.is_valid():
data = form.cleaned_data
conn.create_iface(data['name'], data['itype'], data['start_mode'], data['netdev'],
data['ipv4_type'], data['ipv4_addr'], data['ipv4_gw'],
data['ipv6_type'], data['ipv6_addr'], data['ipv6_gw'],
data['stp'], data['delay'])
return HttpResponseRedirect(request.get_full_path())
else:
for msg_err in form.errors.values():
error_messages.append(msg_err.as_text())
conn.close()
except libvirtError as lib_err:
error_messages.append(lib_err)
return render(request, 'interfaces.html', locals())
def interfaces(request, host_id):
"""
Interfaces block
"""
if not request.user.is_authenticated():
return HttpResponseRedirect(reverse('index'))
if not request.user.is_staff:
raise PermissionDenied
errors = []
ifaces_all = []
compute = Compute.objects.get(id=host_id)
try:
conn = wvmInterfaces(compute.hostname, compute.login, compute.password,
compute.type, compute.hypervisor)
ifaces = conn.get_ifaces()
try:
netdevs = conn.get_net_device()
except:
netdevs = ['eth0', 'eth1']
for iface in ifaces:
ifaces_all.append(conn.get_iface_info(iface))
if request.method == 'POST':
if 'create' in request.POST:
form = AddInterface(request.POST)
if form.is_valid():
data = form.cleaned_data
conn.create_iface(data['name'], data['itype'],
data['start_mode'], data['netdev'],
data['ipv4_type'], data['ipv4_addr'],
data['ipv4_gw'], data['ipv6_type'],
data['ipv6_addr'], data['ipv6_gw'],
data['stp'], data['delay'])
return HttpResponseRedirect(request.get_full_path())
conn.close()
except libvirtError as err:
errors.append(err)
return render_to_response('interfaces.html',
locals(),
context_instance=RequestContext(request))
def interfaces(request, host_id):
"""
Interfaces block
"""
if not request.user.is_authenticated():
return HttpResponseRedirect(reverse('index'))
if not request.user.is_staff:
raise PermissionDenied
errors = []
ifaces_all = []
compute = Compute.objects.get(id=host_id)
try:
conn = wvmInterfaces(compute.hostname,
compute.login,
compute.password,
compute.type,
compute.hypervisor)
ifaces = conn.get_ifaces()
try:
netdevs = conn.get_net_device()
except:
netdevs = ['eth0', 'eth1']
for iface in ifaces:
ifaces_all.append(conn.get_iface_info(iface))
if request.method == 'POST':
if 'create' in request.POST:
form = AddInterface(request.POST)
if form.is_valid():
data = form.cleaned_data
conn.create_iface(data['name'], data['itype'], data['start_mode'], data['netdev'],
data['ipv4_type'], data['ipv4_addr'], data['ipv4_gw'],
data['ipv6_type'], data['ipv6_addr'], data['ipv6_gw'],
data['stp'], data['delay'])
return HttpResponseRedirect(request.get_full_path())
conn.close()
except libvirtError as err:
errors.append(err)
return render_to_response('interfaces.html', locals(), context_instance=RequestContext(request))
def interfaces(request, host_id):
"""
Interfaces block
"""
errors = []
ifaces_all = []
compute = Compute.objects.get(id=host_id)
try:
conn = wvmInterfaces(compute.hostname, compute.login, compute.password,
compute.type)
ifaces = conn.get_ifaces()
try:
netdevs = conn.get_net_device()
except:
netdevs = ['eth0', 'eth1']
for iface in ifaces:
ifaces_all.append(conn.get_iface_info(iface))
if request.method == 'POST':
if 'create' in request.POST:
form = AddInterface(request.POST)
if form.is_valid():
data = form.cleaned_data
conn.create_iface(data['name'], data['itype'],
data['start_mode'], data['netdev'],
data['ipv4_type'], data['ipv4_addr'],
data['ipv4_gw'], data['ipv6_type'],
data['ipv6_addr'], data['ipv6_gw'],
data['stp'], data['delay'])
return HttpResponseRedirect(request.get_full_path())
conn.close()
except libvirtError as err:
errors.append(err)
return render(None, 'interfaces.html', locals(), request)
def create(request, host_id):
"""
Create new instance.
"""
if not request.user.is_authenticated():
return HttpResponseRedirect(reverse('login'))
conn = None
errors = []
ifaces_all = []
ifaces_all_name = ""
storages = []
hd_resources = {}
meta_prealloc = False
compute = Compute.objects.get(id=host_id)
flavors = Flavor.objects.filter().order_by('id')
flavor_name_list = Flavor.objects.filter(label='label')
memory_range = [2048, 4096, 6144, 8192, 16384]
vcpu_range = None
try:
conn = wvmCreate(compute.hostname,
compute.login,
compute.password,
compute.type)
conn_interfaces = wvmInterfaces(compute.hostname,
compute.login,
compute.password,
compute.type)
ifaces = conn_interfaces.get_ifaces()
storages = sorted(conn.get_storages())
instances = conn.get_instances()
get_images = sorted(conn.get_storages_images())
if os.path.exists(util.get_hd_resources_conf()):
hd_resources = util.load_hd_resources()
mem_left = hd_resources["mem"]
vcpu_left = hd_resources["vcpu"]
hd_resources = util.filter_hd_resources(hd_resources)
else:
hd_resources = util.create_hd_resources()
mem_left = hd_resources["mem"]
vcpu_left = hd_resources["vcpu"]
hd_resources = util.filter_hd_resources(hd_resources)
memory_range = [ memory for memory in memory_range if memory/1024 <= mem_left ]
vcpu_range = xrange(1, int(vcpu_left) + 1)
except libvirtError as err:
errors.append(err)
if conn_interfaces:
try:
netdevs = conn_interfaces.get_net_device()
except:
netdevs = ['eth0', 'eth1']
if conn:
if not storages:
msg = _("You haven't defined have any storage pools")
errors.append(msg)
if request.method == 'POST':
if 'create_flavor' in request.POST:
form = FlavorAddForm(request.POST)
if form.is_valid():
data = form.cleaned_data
flavor_name_list = Flavor.objects.filter(label=data['label'])
if flavor_name_list:
msg = _("A virtual machine template with this name already exists")
errors.append(msg)
else:
create_flavor = Flavor(label=data['label'],
vcpu=data['vcpu'],
memory=data['memory'],
disk=data['disk'])
create_flavor.save()
return HttpResponseRedirect(request.get_full_path())
if 'delete_flavor' in request.POST:
flavor_id = request.POST.get('flavor', '')
delete_flavor = Flavor.objects.get(id=flavor_id)
delete_flavor.delete()
return HttpResponseRedirect(request.get_full_path())
if 'create_xml' in request.POST:
xml = request.POST.get('from_xml', '')
try:
name = util.get_xml_path(xml, '/domain/name')
except util.libxml2.parserError:
name = None
if name in instances:
msg = _("A virtual machine with this name already exists")
errors.append(msg)
else:
try:
conn._defineXML(xml)
return HttpResponseRedirect(reverse('instance', args=[host_id, name]))
except libvirtError as err:
errors.append(err.message)
if 'create' in request.POST:
volumes = {}
interfaces = []
vm_vfs_info = {}
form = NewVMForm(request.POST)
if form.is_valid():
data = form.cleaned_data
if instances:
if data['name'] in instances:
msg = _("A virtual machine with this name already exists")
errors.append(msg)
if not errors:
if data['hdd_size']:
try:
path = conn.create_volume(data['storage'], data['name'], data['hdd_size'],
metadata=meta_prealloc)
volumes[path] = conn.get_volume_type(path)
except libvirtError as msg_error:
errors.append(msg_error.message)
elif data['template']:
templ_path = conn.get_volume_path(data['template'])
clone_path = conn.clone_from_template(data['name'], templ_path, metadata=meta_prealloc)
volumes[clone_path] = conn.get_volume_type(clone_path)
ifaces_all = request.POST.getlist('interfaces')
else:
if not data['images']:
msg = _("First you need to create or select an image")
errors.append(msg)
else:
for vol in data['images'].split(','):
try:
path = conn.get_volume_path(vol)
volumes[path] = conn.get_volume_type(path)
except libvirtError as msg_error:
errors.append(msg_error.message)
if not errors:
uuid = util.randomUUID()
try:
template_ver3_flag = True
if data['template'].find("WiseGrid_V3") == -1:
template_ver3_flag = False
conn.create_instance(data['name'], data['cur_memory'], data['cur_vcpu'],
uuid, volumes, ifaces_all, False, True, template_ver3_flag)
create_instance = Instance(compute_id=host_id, name=data['name'], uuid=uuid)
create_instance.save()
vm_vfs_info[data['name']] = ifaces_all
if not errors:
util.update_vfs_fro_vm(vm_vfs_info)
return HttpResponseRedirect(reverse('instance', args=[host_id, data['name']]))
except libvirtError as err:
if data['hdd_size']:
conn.delete_volume(volumes.keys()[0])
errors.append(err)
else:
print form.errors
errors.append(form.errors)
conn.close()
return HttpResponseRedirect(reverse('instances',args=[host_id,errors]))
def instance(request, host_id, vname):
"""
Instance block
"""
if not request.user.is_authenticated():
return HttpResponseRedirect(reverse('login'))
def show_clone_disk(disks):
clone_disk = []
for disk in disks:
if disk['image'] is None:
continue
if disk['image'].count(".") and len(disk['image'].rsplit(".", 1)[1]) <= 7:
name, suffix = disk['image'].rsplit(".", 1)
image = name + "-clone" + "." + suffix
else:
image = disk['image'] + "-clone"
clone_disk.append(
{'dev': disk['dev'], 'storage': disk['storage'], 'image': image, 'format': disk['format']})
return clone_disk
errors = []
messages = []
time_refresh = TIME_JS_REFRESH * 3
compute = Compute.objects.get(id=host_id)
computes = Compute.objects.all()
computes_count = len(computes)
keymaps = QEMU_KEYMAPS
console_types = QEMU_CONSOLE_TYPES
try:
conn = wvmInstance(compute.hostname,
compute.login,
compute.password,
compute.type,
vname)
conn_interfaces = wvmInterfaces(compute.hostname,
compute.login,
compute.password,
compute.type)
ifaces = conn_interfaces.get_ifaces()
i = 0
ifaces_all = util.get_free_vfs()
ifaces_all = sorted(ifaces_all.iteritems(),key=lambda ax:ax[0])
print ifaces_all
temp_ifaces = []
hd_resources = []
hd_resources_checked = conn.get_hd_resources_device()
if os.path.exists(util.get_hd_resources_conf()):
hd_resources = util.load_hd_resources()
for vf_filter in hd_resources.keys():
if vf_filter == "mem" or vf_filter == "vcpu":
continue
if hd_resources[vf_filter]['used'] == 1:
del hd_resources[vf_filter]
else:
hd_resources = util.create_hd_resources()
vcpu_left = hd_resources["vcpu"]
mem_left = hd_resources["mem"]
del hd_resources["vcpu"]
del hd_resources["mem"]
is_vf = False
status = conn.get_status()
autostart = conn.get_autostart()
vcpu = conn.get_vcpu()
cur_vcpu = conn.get_cur_vcpu()
uuid = conn.get_uuid()
memory = conn.get_memory()
cur_memory = conn.get_cur_memory()
description = conn.get_description()
disks = conn.get_disk_device()
media = conn.get_media_device()
networks = conn.get_net_device()
hd_resources_checked = conn.get_hd_resources_device()
media_iso = sorted(conn.get_iso_media())
vcpu_range = conn.get_max_cpus()
vcpu_max = vcpu_range
vcpu_range = xrange(1, int(vcpu_left) + 1)
memory_range = [2048, 4096, 6144, 8192, 16384]
memory_range = [ memory for memory in memory_range if memory/1024 <= mem_left ]
if memory not in memory_range:
insort(memory_range, memory)
if cur_memory not in memory_range:
insort(memory_range, cur_memory)
memory_host = conn.get_max_memory()
vcpu_host = len(vcpu_max)
telnet_port = conn.get_telnet_port()
console_type = conn.get_console_type()
console_port = conn.get_console_port()
console_keymap = conn.get_console_keymap()
snapshots = sorted(conn.get_snapshot(), reverse=True)
inst_xml = conn._XMLDesc(VIR_DOMAIN_XML_SECURE)
has_managed_save_image = conn.get_managed_save_image()
clone_disks = show_clone_disk(disks)
console_passwd = conn.get_console_passwd()
vf_infos = util.get_pfvf_map(vname)
if not vf_infos:
vf_infos = {
"test_pf1":[("vf1",'1.0.21'),('vf2','1.0.22')],
"test_pf2":[("vf2",'1.0.31'),("vf3",'1.0.32')],
"test_pf3":[("vf3",'1.0.41'),("vf5",'1.0.42')],
}
try:
instance = Instance.objects.get(compute_id=host_id, name=vname)
if instance.uuid != uuid:
instance.uuid = uuid
instance.save()
except Instance.DoesNotExist:
instance = Instance(compute_id=host_id, name=vname, uuid=uuid)
instance.save()
if request.method == 'POST':
if 'start' in request.POST:
conn.start()
return HttpResponseRedirect(request.get_full_path() + '#shutdown')
if 'power' in request.POST:
if 'shutdown' == request.POST.get('power', ''):
conn.shutdown()
return HttpResponseRedirect(request.get_full_path() + '#shutdown')
if 'destroy' == request.POST.get('power', ''):
conn.force_shutdown()
return HttpResponseRedirect(request.get_full_path() + '#forceshutdown')
if 'managedsave' == request.POST.get('power', ''):
conn.managedsave()
return HttpResponseRedirect(request.get_full_path() + '#managedsave')
if 'deletesaveimage' in request.POST:
conn.managed_save_remove()
return HttpResponseRedirect(request.get_full_path() + '#managedsave')
if 'suspend' in request.POST:
conn.suspend()
return HttpResponseRedirect(request.get_full_path() + '#suspend')
if 'resume' in request.POST:
conn.resume()
return HttpResponseRedirect(request.get_full_path() + '#suspend')
if 'delete' in request.POST:
if conn.get_status() == 1:
conn.force_shutdown()
try:
instance = Instance.objects.get(compute_id=host_id, name=vname)
instance.delete()
conn.delete_disk()
hd_resources_all = util.load_hd_resources()
for vf in hd_resources_checked:
hd_resources_all[vf]['used'] = 0
hd_resources_all["vcpu"] = int(hd_resources_all["vcpu"]) + vcpu
hd_resources_all["mem"] = int(hd_resources_all["mem"]) + cur_memory / 1024
util.save_hd_resources(hd_resources_all)
finally:
conn.delete()
return HttpResponseRedirect(reverse('instances', args=[host_id]))
if 'snapshot' in request.POST:
name = request.POST.get('name', '')
conn.create_snapshot(name)
return HttpResponseRedirect(request.get_full_path() + '#istaceshapshosts')
if 'umount_iso' in request.POST:
image = request.POST.get('path', '')
dev = request.POST.get('umount_iso', '')
conn.umount_iso(dev, image)
return HttpResponseRedirect(request.get_full_path() + '#instancemedia')
if 'mount_iso' in request.POST:
image = request.POST.get('media', '')
dev = request.POST.get('mount_iso', '')
conn.mount_iso(dev, image)
return HttpResponseRedirect(request.get_full_path() + '#instancemedia')
if 'set_autostart' in request.POST:
conn.set_autostart(1)
return HttpResponseRedirect(request.get_full_path() + '#instancesettings')
if 'unset_autostart' in request.POST:
conn.set_autostart(0)
return HttpResponseRedirect(request.get_full_path() + '#instancesettings')
if 'change_settings' in request.POST:
description = request.POST.get('description', '')
cur_vcpu_original = vcpu
cur_mem_original = cur_memory
vcpu = request.POST.get('vcpu', '')
cur_vcpu = request.POST.get('cur_vcpu', '')
memory = request.POST.get('memory', '')
memory_custom = request.POST.get('memory_custom', '')
if memory_custom:
memory = memory_custom
cur_memory = request.POST.get('cur_memory', '')
cur_memory_custom = request.POST.get('cur_memory_custom', '')
hd_resources_set = request.POST.getlist("ethx")
if cur_memory_custom:
cur_memory = cur_memory_custom
conn.change_settings(description, cur_memory, cur_memory, cur_vcpu, cur_vcpu, hd_resources_set)
hd_resources_all = util.load_hd_resources()
for vf in hd_resources_checked:
if vf not in hd_resources_set:
hd_resources_all[vf]['used'] = 0
for vf in hd_resources_set:
hd_resources_all[vf]['used'] = 1
hd_resources_all["vcpu"] = int(hd_resources_all["vcpu"]) - int(cur_vcpu) + cur_vcpu_original
hd_resources_all["mem"] = (int(hd_resources_all["mem"]) * 1024 - int(cur_memory)) / 1024 + int(cur_mem_original)/1024
util.save_hd_resources(hd_resources_all)
return HttpResponseRedirect(request.get_full_path() + '#instancesettings')
if 'change_xml' in request.POST:
xml = request.POST.get('inst_xml', '')
if xml:
conn._defineXML(xml)
return HttpResponseRedirect(request.get_full_path() + '#instancexml')
if 'set_console_passwd' in request.POST:
if request.POST.get('auto_pass', ''):
passwd = ''.join([choice(letters + digits) for i in xrange(12)])
else:
passwd = request.POST.get('console_passwd', '')
clear = request.POST.get('clear_pass', False)
if clear:
passwd = ''
if not passwd and not clear:
msg = _("Enter the console password or select Generate")
errors.append(msg)
if not errors:
if not conn.set_console_passwd(passwd):
msg = _("Error setting console password. You should check that your instance have an graphic device.")
errors.append(msg)
else:
return HttpResponseRedirect(request.get_full_path() + '#console_pass')
if 'set_console_keymap' in request.POST:
keymap = request.POST.get('console_keymap', '')
clear = request.POST.get('clear_keymap', False)
if clear:
conn.set_console_keymap('')
else:
conn.set_console_keymap(keymap)
return HttpResponseRedirect(request.get_full_path() + '#console_keymap')
if 'set_console_type' in request.POST:
console_type = request.POST.get('console_type', '')
conn.set_console_type(console_type)
return HttpResponseRedirect(request.get_full_path() + '#console_type')
if 'migrate' in request.POST:
compute_id = request.POST.get('compute_id', '')
live = request.POST.get('live_migrate', False)
unsafe = request.POST.get('unsafe_migrate', False)
xml_del = request.POST.get('xml_delete', False)
new_compute = Compute.objects.get(id=compute_id)
conn_migrate = wvmInstances(new_compute.hostname,
new_compute.login,
new_compute.password,
new_compute.type)
conn_migrate.moveto(conn, vname, live, unsafe, xml_del)
conn_migrate.define_move(vname)
conn_migrate.close()
return HttpResponseRedirect(reverse('instance', args=[compute_id, vname]))
if 'delete_snapshot' in request.POST:
snap_name = request.POST.get('name', '')
conn.snapshot_delete(snap_name)
return HttpResponseRedirect(request.get_full_path() + '#istaceshapshosts')
if 'revert_snapshot' in request.POST:
snap_name = request.POST.get('name', '')
conn.snapshot_revert(snap_name)
msg = _("Successful revert snapshot: ")
msg += snap_name
messages.append(msg)
if 'clone' in request.POST:
clone_data = {}
clone_data['name'] = request.POST.get('name', '')
for post in request.POST:
if 'disk' or 'meta' in post:
clone_data[post] = request.POST.get(post, '')
conn.clone_instance(clone_data)
return HttpResponseRedirect(reverse('instance', args=[host_id, clone_data['name']]))
if 'add_vf' in request.POST:
from django.utils.translation import ugettext as _
count_vf = 0
for pf,vfs in vf_infos.items():
for vf in vfs:
count_vf = count_vf+1
cnt_max = settings.vf_cnt_max
if count_vf>cnt_max:
errors.append(_("One instance has amount max VF is:")+str(cnt_max))
return render_to_response('instance.html', locals(), context_instance=RequestContext(request))
vf_data = request.POST.getlist('interfaces')
if (len(vf_data)+count_vf)>cnt_max:
errors.append(_("One instance has amount max VF is:")+str(cnt_max))
return render_to_response('instance.html', locals(), context_instance=RequestContext(request))
inst_xml = conn.change_nics_settings(True, vf_data)
vf_infos = util.get_pfvf_map(vname)
if not vf_infos:
vf_infos = {
"test_pf1":[("vf1",'1.0.21'),('vf2','1.0.22')],
"test_pf2":[("vf2",'1.0.31'),("vf3",'1.0.32')],
"test_pf3":[("vf3",'1.0.41'),("vf5",'1.0.42')],
}
return HttpResponseRedirect('/instance/%s/%s'%(host_id,vname))
if 'del_vf' in request.POST:
del_vf_id = request.POST.get('vf_id', '')
count_vf = 0
for pf,vfs in vf_infos.items():
for vf in vfs:
count_vf = count_vf+1
if count_vf == 1:
errors.append(_("It is the last Vf. Can't delete !"))
return render_to_response('instance.html', locals(), context_instance=RequestContext(request))
inst_xml = conn.change_nics_settings(False, [del_vf_id])
vf_infos = util.get_pfvf_map(vname)
is_vf = True
if not vf_infos:
vf_infos = {
"test_pf1":[("vf1",'1.0.21'),('vf2','1.0.22')],
"test_pf2":[("vf2",'1.0.31'),("vf3",'1.0.32')],
"test_pf3":[("vf3",'1.0.41'),("vf5",'1.0.42')],
}
return HttpResponseRedirect('/instance/%s/%s'%(host_id,vname))
conn.close()
except libvirtError as err:
errors.append(err)
return render_to_response('instance.html', locals(), context_instance=RequestContext(request))