def task(ctx, config):
"""
Prepare MDS cluster for upgrade.
This task reduces ranks to 1 and stops all standbys.
"""
if config is None:
config = {}
assert isinstance(config, dict), \
'snap-upgrade task only accepts a dict for configuration'
fs = Filesystem(ctx)
status = fs.getinfo()
fs.set_max_mds(1)
fs.reach_max_mds()
# Stop standbys now to minimize time rank 0 is down in subsequent:
# tasks:
# - ceph.stop: [mds.*]
rank0 = fs.get_rank(rank=0, status=status)
for daemon in ctx.daemons.iter_daemons_of_role('mds',
fs.mon_manager.cluster):
if rank0['name'] != daemon.id_:
daemon.stop()
for i in range(1, 10):
time.sleep(5) # time for FSMap to update
status = fs.getinfo()
if len(list(status.get_standbys())) == 0:
break
assert (len(list(status.get_standbys())) == 0)
def task(ctx, config):
"""
Prepare MDS cluster for upgrade.
This task reduces ranks to 1 and stops all standbys.
"""
if config is None:
config = {}
assert isinstance(config, dict), \
'snap-upgrade task only accepts a dict for configuration'
fs = Filesystem(ctx)
fs.getinfo() # load name
fs.set_allow_standby_replay(False)
fs.set_max_mds(1)
fs.reach_max_mds()
