def test_we_dont_call_deregister_when_the_instaces_are_empty(self, mock_landlord, mock_lb):
load_balancer = Mock()
mock_connection = Mock()
mock_landlord.Tenant = StubLandlord
mock_lb.connect_to_region.return_value = mock_connection
load_balancer.name = "MyLoadBalancer"
instances = []
loadbalancer.dettach(load_balancer, instances)
assert not mock_lb.connect_to_region.called
assert not mock_connection.deregister_instances.called
def test_we_dettach_instances_from_the_load_balancer(self, mock_landlord, mock_lb):
load_balancer = Mock()
mock_connection = Mock()
mock_landlord.Tenant = StubLandlord
mock_lb.connect_to_region.return_value = mock_connection
load_balancer.name = "MyLoadBalancer"
instances = ['a', 'b']
loadbalancer.dettach(load_balancer, instances)
mock_lb.connect_to_region.assert_called_with("deploy.region", aws_access_key_id="aws.id", aws_secret_access_key="aws.secret")
mock_connection.deregister_instances.assert_called_with("MyLoadBalancer", instances)
def deploy(job):
job.set_status(JobStatus.running)
project_attributes = job.get_project()
new_instances = ec2.create_and_start_instances(project_attributes)
if ec2.is_running(new_instances, project_attributes):
if project_attributes.get('environment_tier') == EnvironmentTier.WORKER.value:
old_instances = ec2.get_instances(filters={'tag:Project': project_attributes['name']})
old_instance_ids = list(set([instance.id for instance in old_instances]) - set(new_instances))
else:
load_balancer = loadbalancer.get_loadbalancer(project_attributes)
old_instance_ids = [instance.id for instance in load_balancer.instances]
loadbalancer.attach(load_balancer, new_instances)
loadbalancer.dettach(load_balancer, old_instance_ids)
ec2.terminate(old_instance_ids)
job.set_status(JobStatus.done)
else:
ec2.terminate(new_instances)
job.set_status(JobStatus.failed)