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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2013 IBM Corp.
#
# 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.
import socket
import time
from oslo.config import cfg
from nova.compute import flavors
from nova.image import glance
from nova.openstack.common import log as logging
from nova.virt import driver
from nova.virt.powervm import operator
LOG = logging.getLogger(__name__)
powervm_opts = [
cfg.StrOpt('powervm_mgr_type',
default='ivm',
help='PowerVM manager type (ivm, hmc)'),
cfg.StrOpt('powervm_mgr',
default=None,
help='PowerVM manager host or ip'),
cfg.StrOpt('powervm_mgr_user',
default=None,
help='PowerVM manager user name'),
cfg.StrOpt('powervm_mgr_passwd',
default=None,
help='PowerVM manager user password',
secret=True),
cfg.StrOpt('powervm_img_remote_path',
default='/home/padmin',
help='PowerVM image remote path where images will be moved.'
' Make sure this path can fit your biggest image in glance'),
cfg.StrOpt('powervm_img_local_path',
default='/tmp',
help='Local directory to download glance images to.'
' Make sure this path can fit your biggest image in glance')
]
CONF = cfg.CONF
CONF.register_opts(powervm_opts)
class PowerVMDriver(driver.ComputeDriver):
"""PowerVM Implementation of Compute Driver."""
def __init__(self, virtapi):
super(PowerVMDriver, self).__init__(virtapi)
self._powervm = operator.PowerVMOperator()
@property
def host_state(self):
pass
def init_host(self, host):
"""Initialize anything that is necessary for the driver to function,
including catching up with currently running VM's on the given host.
"""
pass
def get_info(self, instance):
"""Get the current status of an instance."""
return self._powervm.get_info(instance['name'])
def get_num_instances(self):
return len(self.list_instances())
def instance_exists(self, instance_name):
return self._powervm.instance_exists(instance_name)
def list_instances(self):
return self._powervm.list_instances()
def get_host_stats(self, refresh=False):
"""Return currently known host stats."""
return self._powervm.get_host_stats(refresh=refresh)
def plug_vifs(self, instance, network_info):
pass
def macs_for_instance(self, instance):
return self._powervm.macs_for_instance(instance)
def spawn(self, context, instance, image_meta, injected_files,
admin_password, network_info=None, block_device_info=None):
"""Create a new instance/VM/domain on powerVM."""
self._powervm.spawn(context, instance, image_meta['id'], network_info)
def destroy(self, instance, network_info, block_device_info=None,
destroy_disks=True):
"""Destroy (shutdown and delete) the specified instance."""
self._powervm.destroy(instance['name'], destroy_disks)
def reboot(self, context, instance, network_info, reboot_type,
block_device_info=None, bad_volumes_callback=None):
"""Reboot the specified instance.
:param instance: Instance object as returned by DB layer.
:param network_info:
:py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info`
:param reboot_type: Either a HARD or SOFT reboot
:param block_device_info: Info pertaining to attached volumes
:param bad_volumes_callback: Function to handle any bad volumes
encountered
"""
pass
def get_host_ip_addr(self):
"""Retrieves the IP address of the hypervisor host."""
LOG.debug(_("In get_host_ip_addr"))
# TODO(mrodden): use operator get_hostname instead
hostname = CONF.powervm_mgr
LOG.debug(_("Attempting to resolve %s") % hostname)
ip_addr = socket.gethostbyname(hostname)
LOG.debug(_("%(hostname)s was successfully resolved to %(ip_addr)s") %
{'hostname': hostname, 'ip_addr': ip_addr})
return ip_addr
def snapshot(self, context, instance, image_id, update_task_state):
"""Snapshots the specified instance.
:param context: security context
:param instance: Instance object as returned by DB layer.
:param image_id: Reference to a pre-created image that will
hold the snapshot.
:param update_task_state: Function reference that allows for updates
to the instance task state.
"""
snapshot_start = time.time()
# get current image info
glance_service, old_image_id = glance.get_remote_image_service(
context, instance['image_ref'])
image_meta = glance_service.show(context, old_image_id)
img_props = image_meta['properties']
# build updated snapshot metadata
snapshot_meta = glance_service.show(context, image_id)
new_snapshot_meta = {'is_public': False,
'name': snapshot_meta['name'],
'status': 'active',
'properties': {'image_location': 'snapshot',
'image_state': 'available',
'owner_id': instance['project_id']
},
'disk_format': image_meta['disk_format'],
'container_format': image_meta['container_format']
}
# disk capture and glance upload
self._powervm.capture_image(context, instance, image_id,
new_snapshot_meta, update_task_state)
snapshot_time = time.time() - snapshot_start
inst_name = instance['name']
LOG.info(_("%(inst_name)s captured in %(snapshot_time)s seconds") %
locals())
def pause(self, instance):
"""Pause the specified instance."""
pass
def unpause(self, instance):
"""Unpause paused VM instance."""
pass
def suspend(self, instance):
"""suspend the specified instance."""
pass
def resume(self, instance, network_info, block_device_info=None):
"""resume the specified instance."""
pass
def power_off(self, instance):
"""Power off the specified instance."""
self._powervm.power_off(instance['name'])
def power_on(self, context, instance, network_info,
block_device_info=None):
"""Power on the specified instance."""
self._powervm.power_on(instance['name'])
def get_available_resource(self, nodename):
"""Retrieve resource info."""
return self._powervm.get_available_resource()
def host_power_action(self, host, action):
"""Reboots, shuts down or powers up the host."""
pass
def legacy_nwinfo(self):
"""
Indicate if the driver requires the legacy network_info format.
"""
return False
def manage_image_cache(self, context, all_instances):
"""
Manage the driver's local image cache.
Some drivers chose to cache images for instances on disk. This method
is an opportunity to do management of that cache which isn't directly
related to other calls into the driver. The prime example is to clean
the cache and remove images which are no longer of interest.
"""
pass
def migrate_disk_and_power_off(self, context, instance, dest,
instance_type, network_info,
block_device_info=None):
"""Transfers the disk of a running instance in multiple phases, turning
off the instance before the end.
:returns: disk_info dictionary that is passed as the
disk_info parameter to finish_migration
on the destination nova-compute host
"""
src_host = self.get_host_ip_addr()
pvm_op = self._powervm._operator
lpar_obj = pvm_op.get_lpar(instance['name'])
vhost = pvm_op.get_vhost_by_instance_id(lpar_obj['lpar_id'])
diskname = pvm_op.get_disk_name_by_vhost(vhost)
self._powervm.power_off(instance['name'], timeout=120)
# NOTE(ldbragst) Here we need to check if the resize or migrate is
# happening on the same host. If yes, then we need to assign a temp
# mac address to the source LPAR so we don't have a conflict when
# another LPAR is booted with the same mac address as the
# original LPAR
if src_host == dest:
macs = self.macs_for_instance(instance)
temp_mac = macs.pop()
self._powervm._operator.set_lpar_mac_base_value(instance['name'],
temp_mac)
disk_info = self._powervm.migrate_disk(
diskname, src_host, dest, CONF.powervm_img_remote_path,
instance['name'])
disk_info['old_lv_size'] = pvm_op.get_logical_vol_size(diskname)
new_name = self._get_resize_name(instance['name'])
pvm_op.rename_lpar(instance['name'], new_name)
return disk_info
def _get_resize_name(self, instance_name):
"""Rename the instance to be migrated to avoid naming conflicts
:param instance_name: name of instance to be migrated
:returns: the new instance name
"""
name_tag = 'rsz_'
# if the current name would overflow with new tag
if ((len(instance_name) + len(name_tag)) > 31):
# remove enough chars for the tag to fit
num_chars = len(name_tag)
old_name = instance_name[num_chars:]
else:
old_name = instance_name
return ''.join([name_tag, old_name])
def finish_migration(self, context, migration, instance, disk_info,
network_info, image_meta, resize_instance,
block_device_info=None, power_on=True):
"""Completes a resize, turning on the migrated instance
:param network_info:
:py:meth:`~nova.network.manager.NetworkManager.get_instance_nw_info`
:param image_meta: image object returned by nova.image.glance that
defines the image from which this instance
was created
"""
lpar_obj = self._powervm._create_lpar_instance(instance, network_info)
instance_type = flavors.extract_flavor(instance)
new_lv_size = instance_type['root_gb']
old_lv_size = disk_info['old_lv_size']
if 'root_disk_file' in disk_info:
disk_size = max(int(new_lv_size), int(old_lv_size))
disk_size_bytes = disk_size * 1024 * 1024 * 1024
self._powervm.deploy_from_migrated_file(
lpar_obj, disk_info['root_disk_file'], disk_size_bytes,
power_on)
else:
# this shouldn't get hit unless someone forgot to handle
# a certain migration type
raise Exception(
_('Unrecognized root disk information: %s') %
disk_info)
def confirm_migration(self, migration, instance, network_info):
"""Confirms a resize, destroying the source VM."""
new_name = self._get_resize_name(instance['name'])
self._powervm.destroy(new_name)
def finish_revert_migration(self, instance, network_info,
block_device_info=None, power_on=True):
"""Finish reverting a resize."""
new_name = self._get_resize_name(instance['name'])
# NOTE(ldbragst) In the case of a resize_revert on the same host
# we reassign the original mac address, replacing the temp mac
# on the old instance that will be started
if (self._powervm.instance_exists(new_name) and
self._powervm.instance_exists(instance['name'])):
original_mac = network_info[0]['address']
self._powervm._operator.set_lpar_mac_base_value(instance['name'],
original_mac)
# Make sure we don't have a failed same-host migration still
# hanging around
if self.instance_exists(new_name):
if self.instance_exists(instance['name']):
self._powervm.destroy(instance['name'])
# undo instance rename and start
self._powervm._operator.rename_lpar(new_name, instance['name'])
if power_on:
self._powervm.power_on(instance['name'])
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