[lvs-users] Backup instance brings up VIPs and keeps them up

Ryan O'Hara rohara at redhat.com
Wed Oct 23 00:42:39 BST 2013


On Tue, Oct 22, 2013 at 11:08:58AM -0700, Stoyan Stoyanov wrote:
> Hello,
> 
> I have the following problem. Occasionally, the backup keepalived instance
> becomes master, brings up the virtual IPs, but then it fails bringing them
> down after it realizes that another instance with higher prio number is
> online.
> 
> Here are excerpts from the log files. everything happens within a second so
> timestamps are omitted.
> 
> On the backup server:
> 
> Keepalived_vrrp: VRRP_Instance(INTIF) Transition to MASTER STATE
> Keepalived_vrrp: VRRP_Group(VG1) Syncing instances to MASTER state
> Keepalived_vrrp: VRRP_Instance(EXTIF) Transition to MASTER STATE
> Keepalived_vrrp: VRRP_Instance(EXTIF) Entering MASTER STATE
> Keepalived_vrrp: VRRP_Instance(INTIF) Received higher prio advert
> Keepalived_vrrp: VRRP_Instance(INTIF) IPSEC-AH : Syncing seq_num -
> Decrement seq
> Keepalived_vrrp: VRRP_Instance(INTIF) Entering BACKUP STATE
> Keepalived_vrrp: VRRP_Group(VG1) Syncing instances to BACKUP state
> kernel: [31833.448553] IPVS: stopping backup sync thread 2564 ...
> kernel: [31833.451613] IPVS: stopping master sync thread 2587 ...
> 
> On the master:
> 
> Keepalived_vrrp: VRRP_Instance(EXTIF) Received lower prio advert, forcing
> new election
> Keepalived_vrrp: VRRP_Instance(EXTIF) IPSEC-AH : Syncing seq_num -
> Increment seq
> Keepalived_vrrp: VRRP_Instance(INTIF) Received lower prio advert, forcing
> new election
> Keepalived_vrrp: VRRP_Instance(INTIF) IPSEC-AH : Syncing seq_num -
> Increment seq
> Keepalived_vrrp: VRRP_Instance(EXTIF) Received lower prio advert, forcing
> new election
> Keepalived_vrrp: VRRP_Instance(EXTIF) IPSEC-AH : Syncing seq_num -
> Increment seq
> 
> INTIF and EXTIF are two vrrp instances associated with different interfaces
> of the load balancer
> VG1 is a vrrp_sync_group containing both INTIF and EXTIF vrrp instances.
> 
> auth_type is AH
> advert_int is 1
> 
> In the case above, the VIPs associated with the EXTIF instance remained up
> regardless that it was logged that the VG1 instances are syncing to backup
> state. In other cases, the VIPs on both EXTIF and INTIF will remain up.
> 
> The environment is:
>   OS: Ubuntu 12.04.3 LTS
>   kernel: 3.2.0-54-generic
>   keepalived: 1.2.2-3ubuntu1.1
>   ipvsadm: 1.25.clean-1ubuntu5
> 
> Any idea what may be causing this?

Can you post your config file? Also, you might have better luck asking
on the keepalived-devel mailing list.

Ryan




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