def _get_simplified_status(status):
"""
Returns the simplified Stack Status.
The simplified Stack status is represented by the struct
``sceptre.StackStatus()`` and can take one of the following options:
* complete
* in_progress
* failed
:param status: The CloudFormation Stack status to simplify.
:type status: str
:returns: The Stack's simplified status
:rtype: sceptre.stack_status.StackStatus
"""
if status.endswith("ROLLBACK_COMPLETE"):
return StackStatus.FAILED
elif status.endswith("_COMPLETE"):
return StackStatus.COMPLETE
elif status.endswith("_IN_PROGRESS"):
return StackStatus.IN_PROGRESS
elif status.endswith("_FAILED"):
return StackStatus.FAILED
else:
raise UnknownStackStatusError("{0} is unknown".format(status))
def launch(self):
"""
Launches the Stack.
If the Stack status is create_failed or rollback_complete, the
Stack is deleted. Launch then tries to create or update the Stack,
depending if it already exists. If there are no updates to be
performed, launch exits gracefully.
:returns: The Stack's status.
:rtype: sceptre.stack_status.StackStatus
"""
self._protect_execution()
self.logger.info("%s - Launching Stack", self.stack.name)
try:
existing_status = self._get_status()
except StackDoesNotExistError:
existing_status = "PENDING"
self.logger.info(
"%s - Stack is in the %s state", self.stack.name, existing_status
)
if existing_status == "PENDING":
status = self.create()
elif existing_status in ["CREATE_FAILED", "ROLLBACK_COMPLETE"]:
self.delete()
status = self.create()
elif existing_status.endswith("COMPLETE"):
try:
status = self.update()
except botocore.exceptions.ClientError as exp:
error_message = exp.response["Error"]["Message"]
if error_message == "No updates are to be performed.":
self.logger.info(
"%s - No updates to perform.", self.stack.name
)
status = StackStatus.COMPLETE
else:
raise
status = status
elif existing_status.endswith("IN_PROGRESS"):
self.logger.info(
"%s - Stack action is already in progress state and cannot "
"be updated", self.stack.name
)
status = StackStatus.IN_PROGRESS
elif existing_status.endswith("FAILED"):
status = StackStatus.FAILED
raise CannotUpdateFailedStackError(
"'{0}' is in a the state '{1}' and cannot be updated".format(
self.stack.name, existing_status
)
)
else:
raise UnknownStackStatusError(
"{0} is unknown".format(existing_status)
)
return status
def launch(self, wait_action):
"""
Launches the Stack.
If the Stack status is create_failed or rollback_complete, the
Stack is deleted. Launch then tries to create or update the Stack,
depending if it already exists. If there are no updates to be
performed, launch exits gracefully.
:returns: The Stack's status.
:rtype: sceptre.stack_status.StackStatus
"""
self._protect_execution()
self.logger.info("%s - Launching Stack", self.stack.name)
try:
existing_status = self._get_status()
except StackDoesNotExistError:
existing_status = "PENDING"
self.logger.info("%s - Stack is in the %s state", self.stack.name,
existing_status)
if existing_status.endswith(
"UPDATE_IN_PROGRESS") or existing_status.endswith(
"CREATE_IN_PROGRESS") or existing_status.endswith(
"UPDATE_ROLLBACK_IN_PROGRESS"
) or existing_status.endswith(
"CLEANUP_IN_PROGRESS") or existing_status.endswith(
"DELETE_IN_PROGRESS") or existing_status.endswith(
"ROLLBACK_IN_PROGRESS"):
# wait until it finalize then lets proceed..
self.logger.info(
"%s - Stack is %s, waiting before launching stack action.",
self.stack.name, existing_status)
existing_status = self._wait_for_completion()
try:
existing_status = self._get_status()
time.sleep(4)
existing_status = self._get_status()
except StackDoesNotExistError:
existing_status = "PENDING"
self.logger.info(
"%s - Stack is now in the following state: %s. Will proceed with command action.",
self.stack.name, existing_status)
if existing_status.endswith("ROLLBACK_COMPLETE"):
existing_status = "PENDING"
elif existing_status.endswith("DELETE_IN_PROGRESS"):
# Force dlete / create
existing_status = "PENDING"
elif existing_status.endswith("CREATE_IN_PROGRESS"):
existing_status = "CREATE_IN_PROGRESS"
elif existing_status.endswith("UPDATE_IN_PROGRESS"):
existing_status = "UPDATE_IN_PROGRESS"
else:
existing_status = "UPDATE_ROLLBACK_COMPLETE"
if existing_status == "PENDING":
status = self.create(wait_action)
elif existing_status in [
"CREATE_FAILED", "ROLLBACK_COMPLETE", "ROLLBACK_FAILED"
]:
self.delete()
status = self.create(wait_action)
elif existing_status.endswith("COMPLETE") or (
existing_status.endswith("IN_PROGRESS")
and wait_action == 'wait_only'):
try:
status = self.update(wait_action)
except botocore.exceptions.ClientError as exp:
error_message = exp.response["Error"]["Message"]
if error_message == "No updates are to be performed.":
self.logger.info("%s - No updates to perform.",
self.stack.name)
status = StackStatus.COMPLETE
else:
raise
# status = self.create()
#elif existing_status.endswith("COMPLETE"):
# status = self.update()
elif existing_status.endswith("IN_PROGRESS"):
self.logger.info(
"%s - Stack action is already in progress state and cannot "
"be updated", self.stack.name)
status = StackStatus.IN_PROGRESS
elif existing_status.endswith("FAILED"):
status = StackStatus.FAILED
raise CannotUpdateFailedStackError(
"'{0}' is in a the state '{1}' and cannot be updated".format(
self.stack.name, existing_status))
else:
raise UnknownStackStatusError(
"{0} is unknown".format(existing_status))
return status