def get_by_host_and_nodename(cls, context, host, nodename):
try:
db_compute = db.compute_node_get_by_host_and_nodename(
context, host, nodename)
except exception.ComputeHostNotFound:
# FIXME(sbauza): Some old computes can still have no host record
# We need to provide compatibility by using the old service_id
# record.
# We assume the compatibility as an extra penalty of one more DB
# call but that's necessary until all nodes are upgraded.
try:
service = objects.Service.get_by_compute_host(context, host)
db_computes = db.compute_nodes_get_by_service_id(
context, service.id)
except exception.ServiceNotFound:
# We need to provide the same exception upstream
raise exception.ComputeHostNotFound(host=host)
db_compute = None
for compute in db_computes:
if compute['hypervisor_hostname'] == nodename:
db_compute = compute
# We can avoid an extra call to Service object in
# _from_db_object
db_compute['host'] = service.host
break
if not db_compute:
raise exception.ComputeHostNotFound(host=host)
return cls._from_db_object(context, cls(), db_compute)
def test_get_first_node_by_host_for_old_compat_not_found(
self, cn_get_all_by_host):
cn_get_all_by_host.side_effect = exception.ComputeHostNotFound(
host='fake')
self.assertRaises(
exception.ComputeHostNotFound,
compute_node.ComputeNode.get_first_node_by_host_for_old_compat,
self.context, 'fake')
def stub_host_power_action(context, host_name, action):
if host_name == "notimplemented":
raise NotImplementedError()
elif host_name == "dummydest":
# The host does not exist
raise exception.ComputeHostNotFound(host=host_name)
elif host_name == "service_not_available":
# The service is not available
raise exception.ComputeServiceUnavailable(host=host_name)
return action
def test_get_by_host_and_nodename_not_found(self, cn_get_by_h_and_n,
svc_get_by_ch,
cn_get_by_svc_id,
svc_get_by_id):
cn_get_by_h_and_n.side_effect = exception.ComputeHostNotFound(
host='fake')
fake_service = service.Service(id=123)
fake_service.host = 'fake'
another_node = fake_old_compute_node.copy()
another_node['hypervisor_hostname'] = 'elsewhere'
svc_get_by_ch.return_value = fake_service
cn_get_by_svc_id.return_value = [another_node]
svc_get_by_id.return_value = fake_service
self.assertRaises(exception.ComputeHostNotFound,
compute_node.ComputeNode.get_by_host_and_nodename,
self.context, 'fake', 'vm.danplanet.com')
def test_get_all_by_host_with_old_compute(self, cn_get_all_by_host,
svc_get_by_ch, cn_get_by_svc_id,
svc_get_by_id):
cn_get_all_by_host.side_effect = exception.ComputeHostNotFound(
host='fake')
fake_service = service.Service(id=123)
fake_service.host = 'fake'
svc_get_by_ch.return_value = fake_service
cn_get_by_svc_id.return_value = [fake_old_compute_node]
svc_get_by_id.return_value = fake_service
computes = compute_node.ComputeNodeList.get_all_by_host(
self.context, 'fake')
self.assertEqual(1, len(computes))
# NOTE(sbauza): Result is still converted to new style Compute
self.compare_obj(computes[0],
fake_compute_node,
subs=self.subs(),
comparators=self.comparators())
def test_get_by_host_and_nodename_with_old_compute(self, cn_get_by_h_and_n,
svc_get_by_ch,
cn_get_by_svc_id,
svc_get_by_id):
cn_get_by_h_and_n.side_effect = exception.ComputeHostNotFound(
host='fake')
fake_service = service.Service(id=123)
fake_service.host = 'fake'
svc_get_by_ch.return_value = fake_service
cn_get_by_svc_id.return_value = [fake_old_compute_node]
svc_get_by_id.return_value = fake_service
compute = compute_node.ComputeNode.get_by_host_and_nodename(
self.context, 'fake', 'vm.danplanet.com')
# NOTE(sbauza): Result is still converted to new style Compute
self.compare_obj(compute,
fake_compute_node,
subs=self.subs(),
comparators=self.comparators())
def stub_set_host_maintenance(context, host_name, mode):
# We'll simulate success and failure by assuming
# that 'host_c1' always succeeds, and 'host_c2'
# always fails
results = {True: "on_maintenance", False: "off_maintenance"}
if host_name == "notimplemented":
# The vm driver for this host doesn't support this feature
raise NotImplementedError()
elif host_name == "dummydest":
# The host does not exist
raise exception.ComputeHostNotFound(host=host_name)
elif host_name == "service_not_available":
# The service is not available
raise exception.ComputeServiceUnavailable(host=host_name)
elif host_name == "host_c2":
# Simulate a failure
return results[not mode]
else:
# Do the right thing
return results[mode]
def stub_set_host_enabled(context, host_name, enabled):
"""Simulates three possible behaviours for VM drivers or compute
drivers when enabling or disabling a host.
'enabled' means new instances can go to this host
'disabled' means they can't
"""
results = {True: "enabled", False: "disabled"}
if host_name == "notimplemented":
# The vm driver for this host doesn't support this feature
raise NotImplementedError()
elif host_name == "dummydest":
# The host does not exist
raise exception.ComputeHostNotFound(host=host_name)
elif host_name == "service_not_available":
# The service is not available
raise exception.ComputeServiceUnavailable(host=host_name)
elif host_name == "host_c2":
# Simulate a failure
return results[not enabled]
else:
# Do the right thing
return results[enabled]
def get_all_by_host(cls, context, host, use_slave=False):
try:
db_computes = db.compute_node_get_all_by_host(
context, host, use_slave)
except exception.ComputeHostNotFound:
# FIXME(sbauza): Some old computes can still have no host record
# We need to provide compatibility by using the old service_id
# record.
# We assume the compatibility as an extra penalty of one more DB
# call but that's necessary until all nodes are upgraded.
try:
service = objects.Service.get_by_compute_host(
context, host, use_slave)
db_computes = db.compute_nodes_get_by_service_id(
context, service.id)
except exception.ServiceNotFound:
# We need to provide the same exception upstream
raise exception.ComputeHostNotFound(host=host)
# We can avoid an extra call to Service object in _from_db_object
for db_compute in db_computes:
db_compute['host'] = service.host
return base.obj_make_list(context, cls(context), objects.ComputeNode,
db_computes)
def fake_compute_node_get(context, compute_id):
for hyper in test_hypervisors.TEST_HYPERS_OBJ:
if hyper.id == int(compute_id):
return hyper
raise exception.ComputeHostNotFound(host=compute_id)
def stub_remove_host_from_aggregate(context, aggregate, host):
raise exception.ComputeHostNotFound(host=host)
def stub_add_host_to_aggregate(context, aggregate, host):
raise exception.ComputeHostNotFound(host=host)
def fake_service_get_by_compute_host(self, context, host):
if host == 'bad-host':
raise exception.ComputeHostNotFound(host=host)
else:
return {'host_name': host, 'service': 'compute', 'zone': 'patron'}
