def _update_settings(self):
try:
admin = ConfigAdmin(logger=self._logger, context=self.context)
settings = admin.update_config(
default_timezone=self.default_timezone,
scheduled_services=self.scheduled_services,
schedule_clusters=self.schedule_clusters,
create_rds_snapshot=self.create_rds_snapshot,
tagname=self.tagname,
regions=self.regions,
cross_account_roles=self.cross_account_roles,
schedule_lambda_account=self.schedule_lambda_account.lower() ==
"true",
use_metrics=self.use_metrics.lower() == "true",
trace=self.trace.lower() == "true",
started_tags=self.started_tags,
stopped_tags=self.stopped_tags)
self._logger.info(INF_CONFIG_SET, str(settings))
except Exception as ex:
self._logger.info(ERR_SETTING_CONFIG, ex)
return False
return True
def __init__(self, event, context):
"""
Initializes instance
:param event: CFN event
:param context: Lambda context
"""
CustomResource.__init__(self, event, context)
self.number_of_periods = 0
classname = self.__class__.__name__
dt = datetime.utcnow()
logstream = LOG_STREAM.format(classname, dt.year, dt.month, dt.day)
self._logger = Logger(logstream=logstream, buffersize=20, context=context)
self._admin = ConfigAdmin(logger=self._logger, context=context)
def handle_request(self):
"""
Handles the event
:return: result of handling the event, result send back to REST admin api
"""
# Setup logging
classname = self.__class__.__name__
dt = datetime.utcnow()
logstream = LOG_STREAM.format(classname, dt.year, dt.month, dt.day)
self._logger = Logger(logstream=logstream, buffersize=20, context=self._context)
with Logger(logstream=logstream, buffersize=20, context=self._context) as logger:
logger.info("Handler {} : Received request {}", self.__class__.__name__, json.dumps(self._event))
# get access to admin api
admin = ConfigAdmin(logger=logger, context=self._context)
# get api action and map it to a function in the admin API
fn = getattr(admin, self.action)
if fn is None:
raise ValueError("Action {} does not exist".format(self.action))
# build parameters for admin API call
temp = self._event.get("params", {})
params = {p: temp[p] for p in temp}
if "name" in self._event:
params["name"] = self._event["name"]
logger.info("Calling \"{}\" with parameters {}", fn.__name__, params)
# call the admin API
result = fn(**params)
logger.info("Call result is {}", result)
return result
class ScheduleResourceHandler(CustomResource):
"""
Implements custom resource handler for CFN support for schedules/periods
"""
def __init__(self, event, context):
"""
Initializes instance
:param event: CFN event
:param context: Lambda context
"""
CustomResource.__init__(self, event, context)
self.number_of_periods = 0
classname = self.__class__.__name__
dt = datetime.utcnow()
logstream = LOG_STREAM.format(classname, dt.year, dt.month, dt.day)
self._logger = Logger(logstream=logstream, buffersize=20, context=context)
self._admin = ConfigAdmin(logger=self._logger, context=context)
@staticmethod
def is_handling_request(event):
"""
Tests if this handler handles the event
:param event: Tested event
:return: True if this is custom resource event for configuring schedule/periods
"""
return event.get("StackId") is not None and event.get("ResourceType") == "Custom::ServiceInstanceSchedule"
@classmethod
def _set_if_specified(cls, source, source_name, dest, dest_name=None, default=None):
val = source.get(source_name, default)
if val is not None:
dest[dest_name if dest_name is not None else source_name] = val
@property
def _schedule_resource_name(self):
name = self.resource_properties.get(PROP_NAME,None)
if name is None:
name = self.logical_resource_id
if str(self.resource_properties.get(PROP_NO_STACK_PREFIX, "False")).lower() == "true":
return name
return "{}-{}".format(self.stack_name, name)
def _create_period(self, period):
self.number_of_periods += 1
period_name = PERIOD_NAME.format(self._schedule_resource_name, self.number_of_periods)
self._logger.info(INF_PERIOD_NAME, period_name)
for p in period:
if p not in VALID_PERIOD_PROPERTIES:
raise ValueError(ERR_INVALID_PERIOD_PROPERTY.format(p, ", ".join(VALID_PERIOD_PROPERTIES)))
create_period_args = {
configuration.NAME: period_name
}
self._set_if_specified(period, PROP_BEGIN_TIME, create_period_args, configuration.BEGINTIME)
self._set_if_specified(period, PROP_END_TIME, create_period_args, configuration.ENDTIME)
self._set_if_specified(period, PROP_MONTH_DAYS, create_period_args, configuration.MONTHDAYS)
self._set_if_specified(period, PROP_MONTHS, create_period_args, configuration.MONTHS)
self._set_if_specified(period, PROP_WEEKDAYS, create_period_args, configuration.WEEKDAYS)
create_period_args[configuration.DESCRIPTION] = PERIOD_DESCRIPTION.format(self._schedule_resource_name,
self.number_of_periods)
description_config = period.get(PROP_DESCRIPTION, None)
if description_config is not None:
create_period_args[configuration.DESCRIPTION] = "{}, {}".format(description_config,
create_period_args[configuration.DESCRIPTION])
period = self._admin.create_period(**create_period_args)
self._logger.info(INF_PERIOD_CREATED, safe_json(period, 3))
return period_name, period.get(PROP_INSTANCE_TYPE, None)
def _delete_periods(self):
i = 0
while True:
i += 1
name = PERIOD_NAME.format(self._schedule_resource_name, i)
period = self._admin.delete_period(name, exception_if_not_exists=False)
if period is None:
break
else:
self._logger.info(INF_DELETED_PERIOD, name)
def _create_schedule(self):
self._logger.info(INF_SCHEDULE_NAME, self._schedule_resource_name)
create_schedule_args = {
configuration.NAME: self._schedule_resource_name
}
ps = self.resource_properties
for pr in ps:
# fix for typo in older release, fix parameter if old version with typo is used for compatibility
if pr == "UseMaintenaceWindow":
pr = PROP_USE_MAINTENANCE_WINDOW
if pr not in VALID_SCHEDULE_PROPERTIES:
raise ValueError(ERR_INVALID_SCHEDULE_PROPERTY.format(pr, ", ".join(VALID_SCHEDULE_PROPERTIES)))
self._set_if_specified(ps, PROP_METRICS, create_schedule_args, dest_name=configuration.METRICS)
self._set_if_specified(ps, PROP_OVERWRITE, create_schedule_args, dest_name=configuration.OVERWRITE)
self._set_if_specified(ps, PROP_OVERRIDE_STATUS, create_schedule_args, dest_name=configuration.OVERRIDE_STATUS)
self._set_if_specified(ps, PROP_USE_MAINTENANCE_WINDOW, create_schedule_args,
dest_name=configuration.USE_MAINTENANCE_WINDOW)
self._set_if_specified(ps, PROP_ENFORCED, create_schedule_args, dest_name=configuration.ENFORCED, default=False)
self._set_if_specified(ps, PROP_HIBERNATE, create_schedule_args, dest_name=configuration.HIBERNATE, default=False)
self._set_if_specified(ps, PROP_RETAIN_RUNNING, create_schedule_args, dest_name=configuration.RETAINED_RUNNING,
default=False)
self._set_if_specified(ps, PROP_STOP_NEW, create_schedule_args, dest_name=configuration.STOP_NEW_INSTANCES, default=True)
self._set_if_specified(ps, PROP_TIMEZONE, create_schedule_args, dest_name=configuration.TIMEZONE, default="UTC")
self._set_if_specified(ps, PROP_DESCRIPTION, create_schedule_args, dest_name=configuration.DESCRIPTION)
self._set_if_specified(ps, PROP_SSM_MAINTENANCE_WINDOW, create_schedule_args, dest_name=configuration.SSM_MAINTENANCE_WINDOW)
create_schedule_args[configuration.SCHEDULE_CONFIG_STACK] = self.stack_id
periods = []
try:
self.number_of_periods = 0
for period in ps.get(PROP_PERIODS, []):
period_name, instance_type = self._create_period(period)
if instance_type is not None:
period_name = "{}{}{}".format(period_name, configuration.INSTANCE_TYPE_SEP, instance_type)
periods.append(period_name)
create_schedule_args[configuration.PERIODS] = periods
schedule = self._admin.create_schedule(**create_schedule_args)
self.physical_resource_id = self._schedule_resource_name
self._logger.info(INF_SCHEDULE_CREATED, safe_json(schedule, 3))
except Exception as ex:
self._delete_periods()
raise ex
def _delete_schedule(self):
schedule = self._admin.delete_schedule(name=self._schedule_resource_name, exception_if_not_exists=False)
if schedule is not None:
self._delete_periods()
self._logger.info(INF_DELETE_SCHEDULE, self._schedule_resource_name)
def _update_schedule(self):
self._delete_schedule()
self._create_schedule()
def _create_request(self):
try:
self._create_schedule()
return True
except Exception as ex:
self._logger.error(ex)
return False
finally:
self._logger.flush()
def _update_request(self):
try:
self._update_schedule()
return True
except Exception as ex:
self._logger.error(ex)
return False
finally:
self._logger.flush()
# handles Delete request from CloudFormation
def _delete_request(self):
try:
self._delete_schedule()
return True
except Exception as ex:
self._logger.error(ex)
return False
finally:
self._logger.flush()
def _create_sample_schemas(self):
try:
admin = ConfigAdmin(logger=self._logger, context=self.context)
admin.create_period(**demo_data.PERIOD_WORKING_DAYS)
admin.create_period(**demo_data.PERIOD_WEEKENDS)
admin.create_period(**demo_data.PERIOD_OFFICE_HOURS)
admin.create_period(**demo_data.PERIOD_FIRST_MONDAY_IN_QUARTER)
admin.create_schedule(**demo_data.SCHEDULE_SEATTLE_OFFICE_HOURS)
admin.create_schedule(**demo_data.SCHEDULE_UK_OFFICE_HOURS)
admin.create_schedule(**demo_data.SCHEDULE_STOPPED)
admin.create_schedule(**demo_data.SCHEDULE_RUNNING)
admin.create_schedule(**demo_data.SCHEDULE_SCALING)
except Exception as ex:
self._logger.error(
"Error creating sample schedules and periods {}".format(ex))
def handle_request(self):
"""
Handles the event
:return: result of handling the event, result send back to REST admin api
"""
def snake_to_pascal_case(s):
converted = ""
s = s.strip("_").capitalize()
i = 0
while i < len(s):
if s[i] == "_":
i += 1
converted += s[i].upper()
else:
converted += s[i]
i += 1
return converted
# noinspection PyShadowingNames
def dict_to_pascal_case(d):
d_result = {}
if isinstance(d, dict):
for i in d:
key = snake_to_pascal_case(i)
d_result[key] = dict_to_pascal_case(d[i])
return d_result
elif isinstance(d, list):
return [dict_to_pascal_case(l) for l in d]
return d
try:
self._logger.info("Handler {} : Received CLI request {}",
self.__class__.__name__, json.dumps(self._event))
# get access to admin api
admin = ConfigAdmin(logger=self._logger, context=self._context)
# get api action and map it to a function in the admin API
fn_name = self.commands.get(self.action, None)
if fn_name is None:
raise ValueError("Command {} does not exist".format(
self.action))
fn = getattr(admin, fn_name)
# calling the mapped admin api method
self._logger.info("Calling \"{}\" with parameters {}", fn.__name__,
self.parameters)
api_result = fn(**self.parameters)
# convert to awscli PascalCase output format
result = dict_to_pascal_case(api_result)
# perform output transformation
if fn_name in self.transformations:
result = jmespath.search(self.transformations[fn_name], result)
# log formatted result
json_result = safe_json(result, 3)
self._logger.info("Call result is {}", json_result)
return result
except Exception as ex:
self._logger.info("Call failed, error is {}", str(ex))
return {"Error": str(ex)}
finally:
self._logger.flush()
