def get_create_load_balancer_flow(self, topology, listeners=None):
"""Creates a conditional graph flow that allocates a loadbalancer to
two spare amphorae.
:raises InvalidTopology: Invalid topology specified
:return: The graph flow for creating a loadbalancer.
"""
f_name = constants.CREATE_LOADBALANCER_FLOW
lb_create_flow = linear_flow.Flow(f_name)
lb_create_flow.add(
lifecycle_tasks.LoadBalancerIDToErrorOnRevertTask(
requires=constants.LOADBALANCER_ID))
# allocate VIP
lb_create_flow.add(
database_tasks.ReloadLoadBalancer(
name=constants.RELOAD_LB_BEFOR_ALLOCATE_VIP,
requires=constants.LOADBALANCER_ID,
provides=constants.LOADBALANCER))
lb_create_flow.add(
network_tasks.AllocateVIP(requires=constants.LOADBALANCER,
provides=constants.VIP))
lb_create_flow.add(
database_tasks.UpdateVIPAfterAllocation(
requires=(constants.LOADBALANCER_ID, constants.VIP),
provides=constants.LOADBALANCER))
lb_create_flow.add(
network_tasks.UpdateVIPSecurityGroup(
requires=constants.LOADBALANCER_ID))
lb_create_flow.add(
network_tasks.GetSubnetFromVIP(requires=constants.LOADBALANCER,
provides=constants.SUBNET))
if topology == constants.TOPOLOGY_ACTIVE_STANDBY:
lb_create_flow.add(*self._create_active_standby_topology())
elif topology == constants.TOPOLOGY_SINGLE:
lb_create_flow.add(*self._create_single_topology())
else:
LOG.error("Unknown topology: %s. Unable to build load balancer.",
topology)
raise exceptions.InvalidTopology(topology=topology)
post_amp_prefix = constants.POST_LB_AMP_ASSOCIATION_SUBFLOW
lb_create_flow.add(
self.get_post_lb_amp_association_flow(post_amp_prefix,
topology,
mark_active=(not listeners)))
if listeners:
lb_create_flow.add(*self._create_listeners_flow())
return lb_create_flow
def test_LoadBalancerIDToErrorOnRevertTask(
self, mock_loadbalancer_prov_status_error):
loadbalancer_id_to_error_on_revert = (
lifecycle_tasks.LoadBalancerIDToErrorOnRevertTask())
# Execute
loadbalancer_id_to_error_on_revert.execute(self.LOADBALANCER_ID)
self.assertFalse(mock_loadbalancer_prov_status_error.called)
# Revert
loadbalancer_id_to_error_on_revert.revert(self.LOADBALANCER_ID)
mock_loadbalancer_prov_status_error.assert_called_once_with(
self.LOADBALANCER_ID)