def test_get_last_event_time(self):
timestamp = datetime.utcnow()
self.deployer._client.describe_stack_events = MagicMock(
return_value={"StackEvents": [{
"Timestamp": timestamp
}]})
self.assertEqual(self.deployer.get_last_event_time("test"),
utc_to_timestamp(timestamp))
def describe_stack_events(self, stack_name, time_stamp_marker, **kwargs):
"""
Calls CloudFormation to get current stack events
:param stack_name: Name or ID of the stack
:param time_stamp_marker: last event time on the stack to start streaming events from.
:return:
"""
stack_change_in_progress = True
events = set()
retry_attempts = 0
while stack_change_in_progress and retry_attempts <= self.max_attempts:
try:
# Only sleep if there have been no retry_attempts
time.sleep(self.client_sleep if retry_attempts == 0 else 0)
describe_stacks_resp = self._client.describe_stacks(
StackName=stack_name)
paginator = self._client.get_paginator("describe_stack_events")
response_iterator = paginator.paginate(StackName=stack_name)
stack_status = describe_stacks_resp["Stacks"][0]["StackStatus"]
for event_items in response_iterator:
for event in event_items["StackEvents"]:
if event["EventId"] not in events and utc_to_timestamp(
event["Timestamp"]) > time_stamp_marker:
events.add(event["EventId"])
row_color = self.deploy_color.get_stack_events_status_color(
status=event["ResourceStatus"])
pprint_columns(
columns=[
event["ResourceStatus"],
event["ResourceType"],
event["LogicalResourceId"],
event.get("ResourceStatusReason", "-"),
],
width=kwargs["width"],
margin=kwargs["margin"],
format_string=
DESCRIBE_STACK_EVENTS_FORMAT_STRING,
format_args=kwargs["format_args"],
columns_dict=DESCRIBE_STACK_EVENTS_DEFAULT_ARGS
.copy(),
color=row_color,
)
if self._check_stack_complete(stack_status):
stack_change_in_progress = False
break
except botocore.exceptions.ClientError:
retry_attempts = retry_attempts + 1
if retry_attempts > self.max_attempts:
raise
# Sleep in exponential backoff mode
time.sleep(math.pow(self.backoff, retry_attempts))
def get_last_event_time(self, stack_name):
"""
Finds the last event time stamp thats present for the stack, if not get the current time
:param stack_name: Name or ID of the stack
:return: unix epoch
"""
try:
return utc_to_timestamp(
self._client.describe_stack_events(
StackName=stack_name)["StackEvents"][0]["Timestamp"])
except KeyError:
return time.time()
def describe_stack_events(self, stack_name, time_stamp_marker, **kwargs):
"""
Calls CloudFormation to get current stack events
:param stack_name: Name or ID of the stack
:param time_stamp_marker: last event time on the stack to start streaming events from.
:param kwargs: Other arguments to pass to pprint_columns()
"""
stack_change_in_progress = True
events = set()
retry_attempts = 0
while stack_change_in_progress and retry_attempts <= self.max_attempts:
try:
# Only sleep if there have been no retry_attempts
time.sleep(0 if retry_attempts else self.client_sleep)
describe_stacks_resp = self._client.describe_stacks(
StackName=stack_name)
paginator = self._client.get_paginator("describe_stack_events")
response_iterator = paginator.paginate(StackName=stack_name)
stack_status = describe_stacks_resp["Stacks"][0]["StackStatus"]
latest_time_stamp_marker = time_stamp_marker
for event_items in response_iterator:
for event in event_items["StackEvents"]:
if event["EventId"] not in events and utc_to_timestamp(
event["Timestamp"]) > time_stamp_marker:
events.add(event["EventId"])
latest_time_stamp_marker = max(
latest_time_stamp_marker,
utc_to_timestamp(event["Timestamp"]))
row_color = self.deploy_color.get_stack_events_status_color(
status=event["ResourceStatus"])
pprint_columns(
columns=[
event["ResourceStatus"],
event["ResourceType"],
event["LogicalResourceId"],
event.get("ResourceStatusReason", "-"),
],
width=kwargs["width"],
margin=kwargs["margin"],
format_string=
DESCRIBE_STACK_EVENTS_FORMAT_STRING,
format_args=kwargs["format_args"],
columns_dict=DESCRIBE_STACK_EVENTS_DEFAULT_ARGS
.copy(),
color=row_color,
)
# Skip already shown old event entries
elif utc_to_timestamp(
event["Timestamp"]) <= time_stamp_marker:
time_stamp_marker = latest_time_stamp_marker
break
else: # go to next loop if not break from inside loop
time_stamp_marker = latest_time_stamp_marker # update marker if all events are new
continue
break # reached here only if break from inner loop!
if self._check_stack_complete(stack_status):
stack_change_in_progress = False
break
except botocore.exceptions.ClientError as ex:
retry_attempts = retry_attempts + 1
if retry_attempts > self.max_attempts:
LOG.error("Describing stack events for %s failed: %s",
stack_name, str(ex))
return
# Sleep in exponential backoff mode
time.sleep(math.pow(self.backoff, retry_attempts))
def test_convert_utc_to_timestamp(self):
timestamp = time.time()
utc = datetime.datetime.utcfromtimestamp(timestamp)
# compare in milliseconds
self.assertEqual(int(timestamp * 1000), utc_to_timestamp(utc))
