Hi,
We are using Zen LB v3.0.3 in a two node cluster (Cluster type: both
servers can be masters) and of late facing some flaps in the cluster. In
order to temporarily fix the issue, we disabled the secondary node by
putting into "Maintenance" node.
We were under the assumption that secondary server will never be used. But
to our surprise, today when the flap event occurred, the maintenance node
was trying to switch to master state (in GUI it showed as "Node is on
maintenance")
I presume maintenance mode should not never become active unless its
returned from that state . Is this the expected behavior?
Here are the logs taken from LB1 (master node) & LB2 (maintenance node)
May 23 03:00:32 LB1 ucarp[1030]: [WARNING] Non-preferred master
advertising: reasserting control of VIP with another gratuitous arp
May 23 03:00:32 LB1 ucarp[1030]: [WARNING] Non-preferred master
advertising: reasserting control of VIP with another gratuitous arp
May 23 03:00:32 LB1 ucarp[1030]: [WARNING] Non-preferred master
advertising: reasserting control of VIP with another gratuitous arp
May 23 03:01:29 LB2 ucarp[10867]: [WARNING] Switching to state: MASTER
May 23 03:01:29 LB2 ucarp[10867]: [WARNING] Spawning
[/usr/local/zenloadbalancer/app/zenlatency/zenlatency-start.pl eth0
192.168.1.2]
May 23 03:01:38 LB2 ucarp[10867]: [WARNING] Switching to state: BACKUP
May 23 03:01:38 LB2 ucarp[10867]: [WARNING] Spawning
[/usr/local/zenloadbalancer/app/zenlatency/zenlatency-stop.pl eth0
192.168.1.2]
May 23 03:01:43 LB2 ucarp[10867]: [WARNING] Preferred master advertised:
going back to BACKUP state
Thanks
Sathish
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