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On Fri, Dec 03, 2010 at 09:31:19AM +0100, Mrvka Andreas wrote:
> Hello list,
>
> I hope you can help me.
> I am using a simple 2 node cluster environment on SUSE Linux Enterprise
> Server 11 SP1 HAE.
>
> I only use ldiretord/ipvs and an apache service on both machines.
> My virtual IP address on interface lo:0 and real cluster IP on eth0.
>
> Regarding to the documentation of Novell it should be possible to have
> ldirectord etc. on the same machines.
> Do you agree?
>
> I ask because if I do a tcpdump I see lots of traffic from the client browser
> to the server (http port) and the tcp
> session will never end. ( client side has finished the transfer but on the
> server side tcpdump runs and runs....)
Hi Andreas,
if you want a pair of machines and you want one of them
to be the active linux director + a real server, and you want the other
to be the backup-linux director + a real server then yes it is
possible, but you need to take special care.
1. On the active linux director the VIP should be on lo and
On the backup-linux director the VIP should be on ethX
- That is, you need to move the VIP when a machine moves
from being active to backup and vice versa.
2. The backup-linux director must not have LVS rules in place for the
service being handled by the active linux director.
- That is, you need to have ldirectord running on only the active
linux director. Or in other words, you need to start it
when a machine becomes active and stop it when it becomes a backup.
3. You have to make sure that arp_ignore and arp_announce are set correctly.
Its a bit old, but I have some notes on this at
http://www.ultramonkey.org/3/topologies/sl-ha-lb-eg.html
(In relation to ARP you want the "Debian" notes unless
you have a really ancient kernel.)
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