Source code for openstack_dashboard.dashboards.admin.instances.forms

# 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)

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