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# 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.urls 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
class EvacuateHostForm(forms.SelfHandlingForm):
current_host = forms.CharField(label=_("Current Host"),
widget=forms.TextInput(
attrs={'readonly': 'readonly'}))
target_host = forms.ThemableChoiceField(
label=_("Target Host"),
required=False,
help_text=_("Choose a Host to evacuate servers to. If not selected, "
"the scheduler will auto select target host."))
on_shared_storage = forms.BooleanField(label=_("Shared Storage"),
initial=False, required=False)
def __init__(self, request, *args, **kwargs):
super(EvacuateHostForm, self).__init__(request, *args, **kwargs)
initial = kwargs.get('initial', {})
self.fields['target_host'].choices = \
self.populate_host_choices(request, initial)
def populate_host_choices(self, request, initial):
hosts = initial.get('hosts')
current_host = initial.get('current_host')
host_list = sorted([(host, host)
for host in hosts
if host != current_host])
if host_list:
host_list.insert(0, ("", _("Select a target host")))
else:
host_list.insert(0, ("", _("No other hosts available.")))
return host_list
def handle(self, request, data):
try:
current_host = data['current_host']
target_host = data['target_host']
on_shared_storage = data['on_shared_storage']
# The target_host value will be an empty string when the target
# host wasn't specified. But the evacuate api doesn't allow
# an empty string. So set None as the target_host value.
if not target_host:
target_host = None
api.nova.evacuate_host(request, current_host,
target_host, on_shared_storage)
msg = _('Starting to evacuate host: %s.') % current_host
messages.success(request, msg)
return True
except Exception:
redirect = reverse('horizon:admin:hypervisors:index')
msg = _('Failed to evacuate host: %s.') % data['current_host']
exceptions.handle(request, message=msg, redirect=redirect)
return False
class DisableServiceForm(forms.SelfHandlingForm):
host = forms.CharField(label=_("Host"),
widget=forms.TextInput(
attrs={"readonly": "readonly"}))
reason = forms.CharField(max_length=255,
label=_("Reason"),
required=False)
def handle(self, request, data):
try:
host = data["host"]
reason = data["reason"]
api.nova.service_disable(request, host, "nova-compute",
reason=reason)
msg = _("Disabled compute service for host: %s.") % host
messages.success(request, msg)
return True
except Exception:
redirect = reverse('horizon:admin:hypervisors:index')
msg = _("Failed to disable compute service for host: %s.") % \
data["host"]
exceptions.handle(request, message=msg, redirect=redirect)
return False
class MigrateHostForm(forms.SelfHandlingForm):
current_host = forms.CharField(
label=_("Current Host"),
required=False,
widget=forms.TextInput(
attrs={'readonly': 'readonly'})
)
migrate_type = forms.ChoiceField(
label=_('Running Instance Migration Type'),
choices=[
('live_migrate', _('Live Migrate')),
('cold_migrate', _('Cold Migrate'))
],
widget=forms.ThemableSelectWidget(
attrs={
'class': 'switchable',
'data-slug': 'source'
}
)
)
disk_over_commit = forms.BooleanField(
label=_("Disk Over Commit"),
initial=False,
required=False,
widget=forms.CheckboxInput(
attrs={
'class': 'switched',
'data-switch-on': 'source',
'data-source-live_migrate': _('Disk Over Commit')
}
)
)
block_migration = forms.BooleanField(
label=_("Block Migration"),
initial=False,
required=False,
widget=forms.CheckboxInput(
attrs={
'class': 'switched',
'data-switch-on': 'source',
'data-source-live_migrate': _('Block Migration')
}
)
)
def handle(self, request, data):
try:
current_host = data['current_host']
migrate_type = data['migrate_type']
disk_over_commit = data['disk_over_commit']
block_migration = data['block_migration']
live_migrate = migrate_type == 'live_migrate'
api.nova.migrate_host(
request,
current_host,
live_migrate=live_migrate,
disk_over_commit=disk_over_commit,
block_migration=block_migration
)
msg = _('Starting to migrate host: %(current)s') % \
{'current': current_host}
messages.success(request, msg)
return True
except Exception:
msg = _('Failed to migrate host "%s".') % data['current_host']
redirect = reverse('horizon:admin:hypervisors:index')
exceptions.handle(request, message=msg, redirect=redirect)
return False
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