[lvs-users] Linux HA & Ldirectord question

Simon Horman horms at verge.net.au
Mon Oct 27 05:03:31 GMT 2008


On Sat, Oct 25, 2008 at 08:43:25PM +0100, James Wilkins wrote:
> Hello,
> 
> Apologies if this has been covered before, i've not been able to find
> information on it. Any input/suggestions on this issue appreciated.
> 
> We are running a 2-node HA Cluster utilising ldirectord - at present
> we are running multiple instances of ldirectord - each instance of
> ldirectord handling the checks for one VIP.
> 
> Sporadically we are seeing an issue where rogue nodes from another VIP
> are ending up inside the first VIP (shown by ipvsadm).  To explain
> this better;
> 
> Normal config:
> 
> VIP1:
> 
> TCP 1.2.3.4:443 rr persistent 600
>  -> 192.168.0.1:443 Masq 1 0 0
>  -> 192.168.0.2:443 Masq 1 0 0
>  -> 192.168.0.3:443 Masq 1 0 0
> 
> VIP2:
> 
> TCP 1.2.3.5:443 rr persistent 600
>  -> 192.168.0.1:444 Masq 1 0 0
>  -> 192.168.0.2:444 Masq 1 0 0
>  -> 192.168.0.3:444 Masq 1 0 0
> 
> 
> Problem occured - notice the addition of the two entries with port 445
> from VIP2 ending up in VIP1.
> 
> VIP 1:
> 
> TCP 1.2.3.4:443 rr persistent 600
>  -> 192.168.0.1:443 Masq 1 0 0
>  -> 192.168.0.2:443 Masq 1 0 0
>  -> 192.168.0.3:443 Masq 1 0 0
>  -> 192.168.0.1:444 Masq 1 0 0
>  -> 192.168.0.2:444 Masq 1 0 0
> 
> VIP 2:
> 
> TCP 1.2.3.5:443 rr persistent 600
>  -> 192.168.0.1:444 Masq 1 0 0
>  -> 192.168.0.2:444 Masq 1 0 0
>  -> 192.168.0.3:444 Masq 1 0 0
> 
> Hoping someone can advise if they've seen this before?

Hi James,

that looks very curious and smells a lot like a bug in ldirectord.
Which version are your running?

-- 
Simon Horman
  VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
  H: www.vergenet.net/~horms/             W: www.valinux.co.jp/en





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