def wait_for_changeset(self, changeset_id, stack_name):
"""
Waits until the changeset creation completes
:param changeset_id: ID or name of the changeset
:param stack_name: Stack name
:return: Latest status of the create-change-set operation
"""
sys.stdout.write("\nWaiting for changeset to be created..\n")
sys.stdout.flush()
# Wait for changeset to be created
waiter = self._client.get_waiter("change_set_create_complete")
# Poll every 5 seconds. Changeset creation should be fast
waiter_config = {'Delay': 5}
try:
waiter.wait(ChangeSetName=changeset_id,
StackName=stack_name,
WaiterConfig=waiter_config)
except botocore.exceptions.WaiterError as ex:
LOG.debug("Create changeset waiter exception", exc_info=ex)
resp = ex.last_response
status = resp["Status"]
reason = resp["StatusReason"]
if status == "FAILED" and \
"The submitted information didn't contain changes." in reason or \
"No updates are to be performed" in reason:
raise exceptions.ChangeEmptyError(stack_name=stack_name)
raise RuntimeError("Failed to create the changeset: {0} "
"Status: {1}. Reason: {2}".format(
ex, status, reason))
def test_deploy_raises_exception_on_empty_changeset(self):
stack_name = "stack_name"
parameters = ["a", "b"]
template = "cloudformation template"
capabilities = ["foo", "bar"]
execute_changeset = True
role_arn = "arn:aws:iam::1234567890:role"
notification_arns = ["arn:aws:sns:region:1234567890:notify"]
tags = []
empty_changeset = exceptions.ChangeEmptyError(stack_name=stack_name)
changeset_func = self.deployer.create_and_wait_for_changeset
changeset_func.side_effect = empty_changeset
with self.assertRaises(exceptions.ChangeEmptyError):
self.deploy_command.deploy(self.deployer,
stack_name,
template,
parameters,
capabilities,
execute_changeset,
role_arn,
notification_arns,
None,
tags,
fail_on_empty_changeset=True)