[PVE-User] Losing quorum - cluster broken

[Nicolas Costes]

When restarting cman (I often have to kill -9 processes to do so), multicast 
works for a while :

# omping -m 239.192.205.35 yin hongcha

yin : waiting for response msg
yin : joined (S,G) = (*, 239.192.205.35), pinging
yin :   unicast, seq=1, size=69 bytes, dist=0, time=0.310ms
yin : multicast, seq=1, size=69 bytes, dist=0, time=0.331ms
yin :   unicast, seq=2, size=69 bytes, dist=0, time=0.427ms
yin : multicast, seq=2, size=69 bytes, dist=0, time=0.391ms
yin :   unicast, seq=3, size=69 bytes, dist=0, time=0.427ms
yin : multicast, seq=3, size=69 bytes, dist=0, time=0.390ms
[...]

Then after some minutes, indeed it stops and there is only unicast left.

As long as both nodes interfaces are in promiscuous mode (with tcpdump 
running), the cluster stays in sync. It has been for 18 hours now.

-- 
Nicolas Costes
Responsable de parc informatique
IUT de la Roche-sur-Yon
Université de Nantes
Tél.: 02 51 47 40 29