Hello.
I have tried to create the following demo-cluster to check how work
MasterWins logic:
NODE1 (VM)
|========== tap0 (host)
NODE2 (VM)
|=============br0(host)
NODE3 (VM)
|========== tap1 (host)
NODE3 (VM)
To simulate 50/50 split i just remove "tap1" from "br0".
before split i have the following on all nodes
----------------------
Quorate: Yes
Nodeid Votes Qdevice Name
1 1 A,V,MW 172.18.251.41
2 1 A,NV,MW 172.18.251.42 (local)
3 1 NA,NV,MW 172.18.251.43
4 1 A,NV,MW 172.18.251.44
0 3 QDEV
----------------------
after split
on NODE1 and NODE2 i see
----------------------
Quorate: Yes
Nodeid Votes Qdevice Name
1 1 A,V,MW 172.18.251.41 (local)
2 1 A,NV,MW 172.18.251.42
0 3 QDEV
----------------------
on NODE2 and NODE3 i see
----------------------
Quorate: No
Nodeid Votes Qdevice Name
3 1 A,NV,MW 172.18.251.43
4 1 A,NV,MW 172.18.251.44 (local)
0 3 QDEV
----------------------
So everything fine and MasterWins works as designed.
But after check i tried to restore network connection and added "tap1" to
"br0". I see that all nodes can ping to each other. but corosync still show
me 50/50 split.
tcpdump:
.....................
17:49:36.387217 IP 172.18.251.43.5404 > 172.18.251.44.5405: UDP, length 74
17:49:36.387441 IP 172.18.251.44.5404 > 172.18.251.43.5405: UDP, length 74
17:49:36.447590 IP 172.18.251.41.5404 > 172.18.251.42.5405: UDP, length 74
17:49:36.447811 IP 172.18.251.42.5404 > 172.18.251.41.5405: UDP, length 74
17:49:36.568557 IP 172.18.251.43.5404 > 172.18.251.44.5405: UDP, length 74
17:49:36.568804 IP 172.18.251.44.5404 > 172.18.251.43.5405: UDP, length 74
17:49:36.587829 IP 172.18.251.43.5404 > 239.255.1.1.5405: UDP, length 87
17:49:36.628254 IP 172.18.251.41.5404 > 172.18.251.42.5405: UDP, length 74
17:49:36.628442 IP 172.18.251.42.5404 > 172.18.251.41.5405: UDP, length 74
17:49:36.648323 IP 172.18.251.41.5404 > 239.255.1.1.5405: UDP, length 87
........................
Any ideas ?
_______________________________________________
Openais mailing list
[email protected]
https://lists.linuxfoundation.org/mailman/listinfo/openais
