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Further refine collective startup behavior

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This commit is contained in:
Jarrod Johnson 2021-04-08 18:26:59 -04:00
parent 64d5081be3
commit 153956b2cd
1 changed files with 23 additions and 8 deletions
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31
confluent_server/confluent/collective/manager.py
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@ -164,6 +164,7 @@ def connect_to_leader(cert=None, name=None, leader=None, remote=None):
def follow_leader(remote, leader):
global currentleader
global retrythread
cleanexit = False
newleader = None
try:
@ -179,8 +180,8 @@ def follow_leader(remote, leader):
if newleader:
log.log(
{'info': 'Previous leader directed us to join new leader {}'.format(newleader)})
eventlet.spawn_n(connect_to_leader, None, get_myname(), newleader)
return
if connect_to_leader(None, get_myname(), newleader):
return
log.log({'info': 'Current leader ({0}) has disappeared, restarting '
'collective membership'.format(leader), 'subsystem': 'collective'})
# The leader has folded, time to startup again...
@ -238,6 +239,7 @@ def get_myname():
def handle_connection(connection, cert, request, local=False):
global currentleader
global retrythread
connection.settimeout(5)
operation = request['operation']
if cert:
cert = crypto.dump_certificate(crypto.FILETYPE_ASN1, cert)
@ -467,10 +469,13 @@ def handle_connection(connection, cert, request, local=False):
'subsystem': 'collective'})
if cfm.cfgstreams:
retire_as_leader(connection.getpeername())
eventlet.spawn_n(connect_to_leader, None, None,
leader=connection.getpeername()[0])
tlvdata.send(connection, {'status': 0})
newleader = connection.getpeername()[0]
connection.close()
if not connect_to_leader(None, None, leader=newleader):
if retrythread is None:
retrythread = eventlet.spawn_after(random.random(),
start_collective)
if 'getinfo' == operation:
drone = request['name']
droneinfo = cfm.get_collective_member(drone)
@ -514,10 +519,13 @@ def handle_connection(connection, cert, request, local=False):
'should assimilate me, connecting..',
'txcount': cfm._txcount})
log.log({'info': 'Connecting to leader due to superior '
'transaction count', 'subsystem': collective})
eventlet.spawn_n(connect_to_leader, None, None,
connection.getpeername()[0])
'transaction count', 'subsystem': 'collective'})
connection.close()
if not connect_to_leader(
None, None, connection.getpeername()[0]):
if retrythread is None:
retrythread = eventlet.spawn_after(5 + random.random(),
start_collective)
return
if retrythread is not None:
retrythread.cancel()
@ -535,6 +543,8 @@ def handle_connection(connection, cert, request, local=False):
#tlvdata.send(connection, {'tenants': 0}) # skip the tenants for now,
# so far unused anyway
if not cfm.relay_slaved_requests(drone, connection):
log.log({'info': 'All clients have disconnected, starting recovery process',
'subsystem': 'collective'})
if retrythread is None: # start a recovery if everyone else seems
# to have disappeared
retrythread = eventlet.spawn_after(5 + random.random(),
@ -556,6 +566,7 @@ def populate_collinfo(collinfo):
def try_assimilate(drone, followcount, remote):
global retrythread
try:
remote = connect_to_collective(None, drone, remote)
except socket.error:
@ -580,7 +591,10 @@ def try_assimilate(drone, followcount, remote):
log.log({'info': 'Deferring to {0} due to target being a better leader'.format(
drone), 'subsystem': 'collective'})
retire_as_leader(drone)
connect_to_leader(None, None, leader=remote.getpeername()[0])
if not connect_to_leader(None, None, leader=remote.getpeername()[0]):
if retrythread is None:
retrythread = eventlet.spawn_after(random.random(),
start_collective)
return False
if 'leader' in answer:
# Will wait for leader to see about assimilation
@ -706,6 +720,7 @@ def schedule_rebalance():
def start_collective():
global follower
global retrythread
retrythread = None
try:
cfm.membership_callback = schedule_rebalance
if follower: