def _init_pool(self, aggregate_id, aggregate_name):
"""Set the name label of a XenServer pool."""
try:
pool_ref = self._session.pool.get_all()[0]
self._session.pool.set_name_label(pool_ref, aggregate_name)
except self._session.XenAPI.Failure as e:
LOG.error("Unable to set up pool: %s.", e)
raise exception.AggregateError(aggregate_id=aggregate_id,
action='add_to_aggregate',
reason=six.text_type(e.details))
def _init_pool(self, aggregate_id, aggregate_name):
"""Set the name label of a XenServer pool."""
try:
pool_ref = self._session.call_xenapi("pool.get_all")[0]
self._session.call_xenapi("pool.set_name_label", pool_ref,
aggregate_name)
except self._session.XenAPI.Failure as e:
LOG.error(_("Unable to set up pool: %(e)s.") % locals())
raise exception.AggregateError(aggregate_id=aggregate_id,
action='add_to_aggregate',
reason=str(e.details))
def remove_from_aggregate(self, context, aggregate, host, slave_info=None):
"""Remove a compute host from an aggregate."""
slave_info = slave_info or dict()
if not pool_states.is_hv_pool(aggregate['metadetails']):
return
invalid = {
pool_states.CREATED: 'no hosts to remove',
pool_states.CHANGING: 'setup in progress',
pool_states.DISMISSED: 'aggregate deleted',
}
if aggregate['metadetails'][pool_states.KEY] in invalid.keys():
raise exception.InvalidAggregateAction(
action='remove host',
aggregate_id=aggregate['id'],
reason=invalid[aggregate['metadetails'][pool_states.KEY]])
master_compute = aggregate['metadetails']['master_compute']
if master_compute == CONF.host and master_compute != host:
# this is the master -> instruct it to eject a host from the pool
host_uuid = aggregate['metadetails'][host]
self._eject_slave(aggregate['id'], slave_info.get('compute_uuid'),
host_uuid)
self._virtapi.aggregate_metadata_delete(context, aggregate, host)
elif master_compute == host:
# Remove master from its own pool -> destroy pool only if the
# master is on its own, otherwise raise fault. Destroying a
# pool made only by master is fictional
if len(aggregate['hosts']) > 1:
# NOTE: this could be avoided by doing a master
# re-election, but this is simpler for now.
raise exception.InvalidAggregateAction(
aggregate_id=aggregate['id'],
action='remove_from_aggregate',
reason=_('Unable to eject %(host)s '
'from the pool; pool not empty') % locals())
self._clear_pool(aggregate['id'])
for key in ['master_compute', host]:
self._virtapi.aggregate_metadata_delete(
context, aggregate, key)
elif master_compute and master_compute != host:
# A master exists -> forward pool-eject request to master
slave_info = self._create_slave_info()
self.compute_rpcapi.remove_aggregate_host(context, aggregate['id'],
host, master_compute,
slave_info)
else:
# this shouldn't have happened
raise exception.AggregateError(
aggregate_id=aggregate['id'],
action='remove_from_aggregate',
reason=_('Unable to eject %(host)s '
'from the pool; No master found') % locals())
def remove_from_aggregate(self, context, aggregate, host, **kwargs):
"""Remove a compute host from an aggregate."""
if not pool_states.is_hv_pool(context, aggregate.id):
return
invalid = {
pool_states.CREATED: 'no hosts to remove',
pool_states.CHANGING: 'setup in progress',
pool_states.DISMISSED: 'aggregate deleted',
}
if (db.aggregate_metadata_get(context, aggregate.id)[pool_states.KEY]
in invalid.keys()):
raise exception.InvalidAggregateAction(
action='remove host',
aggregate_id=aggregate.id,
reason=invalid[db.aggregate_metadata_get(
context, aggregate.id)[pool_states.KEY]])
master_compute = db.aggregate_metadata_get(
context, aggregate.id)['master_compute']
if master_compute == FLAGS.host and master_compute != host:
# this is the master -> instruct it to eject a host from the pool
host_uuid = db.aggregate_metadata_get(context, aggregate.id)[host]
self._eject_slave(aggregate.id, kwargs.get('compute_uuid'),
host_uuid)
db.aggregate_metadata_delete(context, aggregate.id, host)
elif master_compute == host:
# Remove master from its own pool -> destroy pool only if the
# master is on its own, otherwise raise fault. Destroying a
# pool made only by master is fictional
if len(aggregate.hosts) > 1:
# NOTE: this could be avoided by doing a master
# re-election, but this is simpler for now.
raise exception.InvalidAggregateAction(
aggregate_id=aggregate.id,
action='remove_from_aggregate',
reason=_('Unable to eject %(host)s '
'from the pool; pool not empty') % locals())
self._clear_pool(aggregate.id)
for key in ['master_compute', host]:
db.aggregate_metadata_delete(context, aggregate.id, key)
elif master_compute and master_compute != host:
# A master exists -> forward pool-eject request to master
forward_request(context, "remove_aggregate_host", master_compute,
aggregate.id, host, self._host_addr,
self._host_uuid)
else:
# this shouldn't have happened
raise exception.AggregateError(
aggregate_id=aggregate.id,
action='remove_from_aggregate',
reason=_('Unable to eject %(host)s '
'from the pool; No master found') % locals())
def _eject_slave(self, aggregate_id, compute_uuid, host_uuid):
"""Eject a slave from a XenServer resource pool."""
try:
# shutdown nova-compute; if there are other VMs running, e.g.
# guest instances, the eject will fail. That's a precaution
# to deal with the fact that the admin should evacuate the host
# first. The eject wipes out the host completely.
vm_ref = self._session.VM.get_by_uuid(compute_uuid)
self._session.VM.clean_shutdown(vm_ref)
host_ref = self._session.host.get_by_uuid(host_uuid)
self._session.pool.eject(host_ref)
except self._session.XenAPI.Failure as e:
LOG.error(_("Pool-eject failed: %s"), e)
raise exception.AggregateError(aggregate_id=aggregate_id,
action='remove_from_aggregate',
reason=str(e.details))
def _join_slave(self, aggregate_id, host, compute_uuid, url, user, passwd):
"""Joins a slave into a XenServer resource pool."""
try:
args = {'compute_uuid': compute_uuid,
'url': url,
'user': user,
'password': passwd,
'force': jsonutils.dumps(CONF.xenserver.use_join_force),
'master_addr': self._host_addr,
'master_user': CONF.xenserver.connection_username,
'master_pass': CONF.xenserver.connection_password, }
self._session.call_plugin('xenhost', 'host_join', args)
except self._session.XenAPI.Failure as e:
LOG.error(_LE("Pool-Join failed: %s"), e)
raise exception.AggregateError(aggregate_id=aggregate_id,
action='add_to_aggregate',
reason=_('Unable to join %s '
'in the pool') % host)
def _join_subordinate(self, aggregate_id, host, compute_uuid, url, user, passwd):
"""Joins a subordinate into a XenServer resource pool."""
try:
args = {'compute_uuid': compute_uuid,
'url': url,
'user': user,
'password': passwd,
'force': jsonutils.dumps(FLAGS.use_join_force),
'main_addr': self._host_addr,
'main_user': FLAGS.xenapi_connection_username,
'main_pass': FLAGS.xenapi_connection_password, }
self._session.call_plugin('xenhost', 'host_join', args)
except self._session.XenAPI.Failure as e:
LOG.error(_("Pool-Join failed: %(e)s") % locals())
raise exception.AggregateError(aggregate_id=aggregate_id,
action='add_to_aggregate',
reason=_('Unable to join %(host)s '
'in the pool') % locals())
def remove_from_aggregate(self, context, aggregate, host, **kwargs):
"""Remove a compute host from an aggregate."""
main_compute = aggregate.metadetails.get('main_compute')
if main_compute == FLAGS.host and main_compute != host:
# this is the main -> instruct it to eject a host from the pool
host_uuid = db.aggregate_metadata_get(context, aggregate.id)[host]
self._eject_subordinate(aggregate.id, kwargs.get('compute_uuid'),
host_uuid)
db.aggregate_metadata_delete(context, aggregate.id, host)
elif main_compute == host:
# Remove main from its own pool -> destroy pool only if the
# main is on its own, otherwise raise fault. Destroying a
# pool made only by main is fictional
if len(aggregate.hosts) > 1:
# NOTE: this could be avoided by doing a main
# re-election, but this is simpler for now.
raise exception.InvalidAggregateAction(
aggregate_id=aggregate.id,
action='remove_from_aggregate',
reason=_('Unable to eject %(host)s '
'from the pool; pool not empty') % locals())
self._clear_pool(aggregate.id)
for key in ['main_compute', host]:
db.aggregate_metadata_delete(context, aggregate.id, key)
elif main_compute and main_compute != host:
# A main exists -> forward pool-eject request to main
forward_request(context, "remove_aggregate_host", main_compute,
aggregate.id, host, self._host_addr,
self._host_uuid)
else:
# this shouldn't have happened
raise exception.AggregateError(
aggregate_id=aggregate.id,
action='remove_from_aggregate',
reason=_('Unable to eject %(host)s '
'from the pool; No main found') % locals())