def initialize(self):
if self.res.is_initialized:
raise DrbdResourceError('Resource "%s" is already initialized.', self.res)
logger.info('Initializing Resource "%s".', self.res)
volume_name = self.res.volume_full_name
logger.info('Creating Volume "%s" for Resource "%s".', volume_name, self.res)
vol = Volume(name=volume_name)
vol.create(self.res.size)
logger.info('Creating Metadata for Resource "%s".', self.res)
sh.drbdadm('create-md', self.res.name)
logger.info('Writing config for Resource "%s".', self.res)
self.write_config()
logger.info('Reloading Drbd for Resource "%s".', self.res)
self.adjust()
logger.info('Marking Resource "%s" as initialized.', self.res)
self.res.is_initialized = True
self.res.save()
logger.info('Resource "%s" has been initialized.', self.res)
return True
def connect(self, discard_my_data=False):
"""Connect to peer.
If discard_my_data=True, it will overwrite any local changes to force it to match peer.
"""
args = []
if discard_my_data:
args.extend(['--', '--discard-my-data'])
args.extend(['connect', self.res.name])
sh.drbdadm(*args)
return True
def resize(self, assume_clean=False):
"""Dynamically grow the Resource to be the full size of the underlying Volume.
If assume_clean=True, then it assumes the new space is just new space, not existing data,
that way it doesn't have to sync it between peers."""
args = []
if assume_clean:
args.extend(['--', '--assume_clean'])
args.extend(['resize', self.res.name])
sh.drbdadm(*args)
return True
def replication_init(self, is_source=False):
repl_name = self.replication_device_name
# Format volume for replication
# Not needed with official tools init script?
sh.drbdadm('create-md', repl_name)
if is_source:
repl_dev_path = self.replication_device_path
# This forcefully overwrites the data of our peer
sh.drbdsetup(repl_dev_path, 'primary', force='yes')
def start_services():
logging.info("Starting storage Pools..")
service('zfs', 'start')
time.sleep(30)
logging.info("Starting volume replication")
service('drbd', 'start')
time.sleep(30)
# Check DRBD status per resource, work with cluster peer to make sure all
# primaries are on one host.
for r in [0, 1, 2]:
r = 'r%d' % r
sh.drbdadm('primary', r)
def outdate(self):
"""Outdates resource"""
sh.drbdadm('outdate', self.res.name)
return True
def adjust(self):
"""Applies any config changes on resource"""
sh.drbdadm('adjust', self.res.name)
return True
def secondary(self):
"""Demote self to secondary"""
sh.drbdadm('secondary', self.res.name)
return True
def primary(self):
"""Promote self to primary"""
sh.drbdadm('primary', self.res.name)
return True
def disconnect(self):
"""Disconnect from peer"""
sh.drbdadm('disconnect', self.res.name)
return True
def replication_demote_to_secondary(self):
repl_name = self.replication_device_name
sh.drbdadm('secondary', repl_name)
def replication_promote_to_primary(self):
repl_name = self.replication_device_name
sh.drbdadm('primary', repl_name)
