|
On Thu, Oct 02, 2003 at 05:47:05PM +0200, Carles Xavier Munyoz Baldó wrote:
> Hi,
> I'm setting up a high availability LVS director with RedHat 8.0
> (kernel-2.4.20-20.8), ipvs-1.0.9 and keepalived.
> I'm running LVS with connection synchronisation enabled.
>
> When the master director faults, the backup director takes its role and all
> stablished connections works without interruption.
> GREAT !!!!! :-)
>
> The problem is, what to when the fault master is recovered ?
> How may I copy the connection table of the backup director to the master
> director ? This way when I bring back the master director the stablished
> connections will not stop.
>
> Is it possible ?
> Which are the steps for the master director reactivacion without stoping the
> current stablished connections in the backup director ?
There are various ways to do this, here is the one I would suggest.
1. Read this post and patch by Alexandre Cassen
http://marc.theaimsgroup.com/?l=linux-virtual-server&m=105459391703228&w=2
2. The patch was put into LVS 1.1.X but not 1.0.X
so if you want that behaviour and you are using
LVS 1.0.X (i.e. 2.4.X kernel) you will need to
patch the code yourself.
3. You may want this patch too which fixes a small bug
in Alexandre's code.
--- ipvs-1.0.10.syncd.orig/ipvs/ip_vs_core.c 2003-07-29
23:37:12.000000000 +0900
+++ ipvs-1.0.10.syncd/ipvs/ip_vs_core.c 2003-09-29 16:02:33.000000000 +0900
@@ -1132,7 +1132,7 @@
/* increase its packet counter and check if it is needed
to be synchronized */
atomic_inc(&cp->in_pkts);
- if (ip_vs_sync_state == IP_VS_STATE_MASTER &&
+ if (ip_vs_sync_state & IP_VS_STATE_MASTER &&
(cp->protocol != IPPROTO_TCP ||
cp->state == IP_VS_S_ESTABLISHED) &&
(atomic_read(&cp->in_pkts) % 50 == sysctl_ip_vs_sync_threshold))
--
Horms
|
