def undo(self, workflow_dict):
LOG.info("Running undo...")
try:
for source_instance in workflow_dict['source_instances']:
if source_instance.instance_type == source_instance.REDIS:
source_host = source_instance.hostname
change_slave_priority_file(
host=source_host, original_value=0, final_value=100)
change_slave_priority_instance(
instance=source_instance, final_value=100)
target_instance = source_instance.future_instance
target_host = target_instance.hostname
change_slave_priority_file(
host=target_host, original_value=100, final_value=0)
change_slave_priority_instance(
instance=target_instance, final_value=0)
for source_instance in workflow_dict['source_instances']:
if source_instance.instance_type == source_instance.REDIS_SENTINEL:
failover_sentinel(host=source_instance.hostname,
sentinel_host=source_instance.address,
sentinel_port=source_instance.port,
service_name=workflow_dict['databaseinfra'].name)
break
return True
except Exception:
traceback = full_stack()
workflow_dict['exceptions']['error_codes'].append(DBAAS_0020)
workflow_dict['exceptions']['traceback'].append(traceback)
return False
def undo(self, workflow_dict):
LOG.info("Running undo...")
try:
for source_instance in workflow_dict['source_instances']:
if source_instance.instance_type == source_instance.REDIS:
source_host = source_instance.hostname
change_slave_priority_file(host=source_host, original_value=0, final_value=100)
change_slave_priority_instance(instance=source_instance, final_value=100)
target_instance = source_instance.future_instance
target_host = target_instance.hostname
change_slave_priority_file(host=target_host, original_value=100, final_value=0)
change_slave_priority_instance(instance=target_instance, final_value=0)
for source_instance in workflow_dict['source_instances']:
if source_instance.instance_type == source_instance.REDIS_SENTINEL:
failover_sentinel(host=source_instance.hostname,
sentinel_host=source_instance.address,
sentinel_port=source_instance.port,
service_name=workflow_dict['databaseinfra'].name)
break
return True
except Exception:
traceback = full_stack()
workflow_dict['exceptions']['error_codes'].append(DBAAS_0020)
workflow_dict['exceptions']['traceback'].append(traceback)
return False
def undo(self):
if not self.is_valid:
return
change_slave_priority_instance(self.target_instance,
self.original_value)
change_slave_priority_file(self.target_instance.hostname,
self.final_value, self.original_value)
def undo(self, workflow_dict):
LOG.info("Running undo...")
try:
databaseinfra = workflow_dict['databaseinfra']
driver = databaseinfra.get_driver()
for source_instance in workflow_dict['source_instances']:
if source_instance.instance_type == source_instance.REDIS:
source_host = source_instance.hostname
change_slave_priority_file(
host=source_host, original_value=0, final_value=100)
change_slave_priority_instance(
instance=source_instance, final_value=100)
target_instance = source_instance.future_instance
target_host = target_instance.hostname
change_slave_priority_file(
host=target_host, original_value=100, final_value=0)
change_slave_priority_instance(
instance=target_instance, final_value=0)
attempts = 1
max_attempts = 10
while True:
sentinel_instance = driver.get_non_database_instances()[0]
failover_sentinel(host=sentinel_instance.hostname,
sentinel_host=sentinel_instance.address,
sentinel_port=sentinel_instance.port,
service_name=databaseinfra.name)
sleep(30)
sentinel_client = driver.get_sentinel_client(sentinel_instance)
master_address = sentinel_client.discover_master(databaseinfra.name)[0]
source_is_master = False
for source_instance in workflow_dict['source_instances']:
if source_instance.address == master_address:
source_is_master = True
LOG.info("{} is master".format(source_instance))
break
if source_is_master:
break
if attempts >= max_attempts:
raise Exception('It could not switch the master.')
attempts += 1
LOG.info("There was something wrong in sentinel failover.")
LOG.info("Trying again ( {} of {} )".format(attempts, max_attempts))
return True
except Exception:
traceback = full_stack()
workflow_dict['exceptions']['error_codes'].append(DBAAS_0020)
workflow_dict['exceptions']['traceback'].append(traceback)
return False
def undo(self, workflow_dict):
LOG.info("Running undo...")
try:
databaseinfra = workflow_dict['databaseinfra']
driver = databaseinfra.get_driver()
for source_instance in workflow_dict['source_instances']:
if source_instance.instance_type == source_instance.REDIS:
source_host = source_instance.hostname
change_slave_priority_file(host=source_host,
original_value=0,
final_value=100)
change_slave_priority_instance(instance=source_instance,
final_value=100)
target_instance = source_instance.future_instance
target_host = target_instance.hostname
change_slave_priority_file(host=target_host,
original_value=100,
final_value=0)
change_slave_priority_instance(instance=target_instance,
final_value=0)
attempts = 1
max_attempts = 10
while True:
sentinel_instance = driver.get_non_database_instances()[0]
failover_sentinel(host=sentinel_instance.hostname,
sentinel_host=sentinel_instance.address,
sentinel_port=sentinel_instance.port,
service_name=databaseinfra.name)
sleep(30)
sentinel_client = driver.get_sentinel_client(sentinel_instance)
master_address = sentinel_client.discover_master(
databaseinfra.name)[0]
source_is_master = False
for source_instance in workflow_dict['source_instances']:
if source_instance.address == master_address:
source_is_master = True
LOG.info("{} is master".format(source_instance))
break
if source_is_master:
break
if attempts >= max_attempts:
raise Exception('It could not switch the master.')
attempts += 1
LOG.info("There was something wrong in sentinel failover.")
LOG.info("Trying again ( {} of {} )".format(
attempts, max_attempts))
return True
except Exception:
traceback = full_stack()
workflow_dict['exceptions']['error_codes'].append(DBAAS_0020)
workflow_dict['exceptions']['traceback'].append(traceback)
return False