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Move fencing to end of keepalive function

This commit is contained in:
Joshua Boniface 2020-06-06 13:19:11 -04:00
parent 1db73bb892
commit a672e06dd2
1 changed files with 31 additions and 31 deletions
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62
node-daemon/pvcnoded/Daemon.py
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@ -1337,37 +1337,6 @@ def node_keepalive():
logger.out('Failed to set keepalive data', state='e') logger.out('Failed to set keepalive data', state='e')
return return
# Look for dead nodes and fence them
if not maintenance:
if debug:
print("Look for dead nodes and fence them")
if config['daemon_mode'] == 'coordinator':
for node_name in d_node:
try:
node_daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
node_domain_state = zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node_name))
node_keepalive = int(zkhandler.readdata(zk_conn, '/nodes/{}/keepalive'.format(node_name)))
except:
node_daemon_state = 'unknown'
node_domain_state = 'unknown'
node_keepalive = 0
# Handle deadtime and fencng if needed
# (A node is considered dead when its keepalive timer is >6*keepalive_interval seconds
# out-of-date while in 'start' state)
node_deadtime = int(time.time()) - ( int(config['keepalive_interval']) * int(config['fence_intervals']) )
if node_keepalive < node_deadtime and node_daemon_state == 'run':
logger.out('Node {} seems dead - starting monitor for fencing'.format(node_name), state='w')
zk_lock = zkhandler.writelock(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
with zk_lock:
# Ensures that, if we lost the lock race and come out of waiting,
# we won't try to trigger our own fence thread.
if zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name)) != 'dead':
fence_thread = threading.Thread(target=fencing.fenceNode, args=(node_name, zk_conn, config, logger), kwargs={})
fence_thread.start()
# Write the updated data after we start the fence thread
zkhandler.writedata(zk_conn, { '/nodes/{}/daemonstate'.format(node_name): 'dead' })
# Display node information to the terminal # Display node information to the terminal
if config['log_keepalives']: if config['log_keepalives']:
if this_node.router_state == 'primary': if this_node.router_state == 'primary':
@ -1425,6 +1394,37 @@ def node_keepalive():
state='t' state='t'
) )
# Look for dead nodes and fence them
if not maintenance:
if debug:
print("Look for dead nodes and fence them")
if config['daemon_mode'] == 'coordinator':
for node_name in d_node:
try:
node_daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
node_domain_state = zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node_name))
node_keepalive = int(zkhandler.readdata(zk_conn, '/nodes/{}/keepalive'.format(node_name)))
except:
node_daemon_state = 'unknown'
node_domain_state = 'unknown'
node_keepalive = 0
# Handle deadtime and fencng if needed
# (A node is considered dead when its keepalive timer is >6*keepalive_interval seconds
# out-of-date while in 'start' state)
node_deadtime = int(time.time()) - ( int(config['keepalive_interval']) * int(config['fence_intervals']) )
if node_keepalive < node_deadtime and node_daemon_state == 'run':
logger.out('Node {} seems dead - starting monitor for fencing'.format(node_name), state='w')
zk_lock = zkhandler.writelock(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
with zk_lock:
# Ensures that, if we lost the lock race and come out of waiting,
# we won't try to trigger our own fence thread.
if zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name)) != 'dead':
fence_thread = threading.Thread(target=fencing.fenceNode, args=(node_name, zk_conn, config, logger), kwargs={})
fence_thread.start()
# Write the updated data after we start the fence thread
zkhandler.writedata(zk_conn, { '/nodes/{}/daemonstate'.format(node_name): 'dead' })
# Start keepalive thread # Start keepalive thread
update_timer = startKeepaliveTimer() update_timer = startKeepaliveTimer()