# Copyright 2013 Kylin OS, Inc
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from django.core.urlresolvers import reverse
from django.utils.translation import ugettext_lazy as _
from horizon import exceptions
from horizon import forms
from horizon import messages
from openstack_dashboard import api
[docs]class LiveMigrateForm(forms.SelfHandlingForm):
current_host = forms.CharField(label=_("Current Host"),
required=False,
widget=forms.TextInput(
attrs={'readonly': 'readonly'}))
host = forms.ChoiceField(label=_("New Host"),
help_text=_("Choose a Host to migrate to."))
disk_over_commit = forms.BooleanField(label=_("Disk Over Commit"),
initial=False, required=False)
block_migration = forms.BooleanField(label=_("Block Migration"),
initial=False, required=False)
def __init__(self, request, *args, **kwargs):
super(LiveMigrateForm, self).__init__(request, *args, **kwargs)
initial = kwargs.get('initial', {})
instance_id = initial.get('instance_id')
self.fields['instance_id'] = forms.CharField(widget=forms.HiddenInput,
initial=instance_id)
self.fields['host'].choices = self.populate_host_choices(request,
initial)
[docs] def populate_host_choices(self, request, initial):
hosts = initial.get('hosts')
current_host = initial.get('current_host')
host_list = [(host.host_name,
host.host_name)
for host in hosts
if (host.service.startswith('compute') and
host.host_name != current_host)]
if host_list:
host_list.insert(0, ("", _("Select a new host")))
else:
host_list.insert(0, ("", _("No other hosts available")))
return sorted(host_list)
[docs] def handle(self, request, data):
try:
block_migration = data['block_migration']
disk_over_commit = data['disk_over_commit']
api.nova.server_live_migrate(request,
data['instance_id'],
data['host'],
block_migration=block_migration,
disk_over_commit=disk_over_commit)
msg = _('The instance is preparing the live migration '
'to host "%s".') % data['host']
messages.success(request, msg)
return True
except Exception:
msg = _('Failed to live migrate instance to '
'host "%s".') % data['host']
redirect = reverse('horizon:admin:instances:index')
exceptions.handle(request, msg, redirect=redirect)