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Just a thought for people using heartbeat and ldirectord. Heartbeat
allows for custom bash scripts. So one could use a custom script to
shutdown the service and bring up the VIP on the chosen realserver.
Sameer
On 10/24/07, David Hinkle <hinkle@xxxxxxxxxxxxxx> wrote:
> Oh, just a quick suggestion. This hack would be completely unnecessary if
> you could simply configure a backup LVS server not to try and load balance.
> I just want a backup to sit there and collect data, I don't want it to try
> and load balance anything until I promote it! :)
>
> David
>
>
> -----Original Message-----
> From: lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx on behalf of Joseph Mack NA3T
> Sent: Tue 10/23/2007 7:34 PM
> To: LinuxVirtualServer.org users mailing list.
> Subject: Re: [lvs-users] FW: Self Configuring High Availability LVS with
> Keepalived
>
> On Tue, 23 Oct 2007, David Hinkle wrote:
>
> > I'm trying to put together a self configuring high
> > availability LVS. Each of my units is a proxy server.
> > Each of them is identical, except a little configuration,
> > and I intend them to come up, elect a director, and serve
> > content.
>
> this was a highly hoped for goal in the early days of LVS.
> The director isn't all that different to a realserver. When
> a director fails out, one of the realservers should be able
> to take over, presumably automatically. The service
> listening on the VIP would have to be shut down on going
> from realserver to director.
>
> However one we got the two director failover working, people
> lost interest. One working scheme was enough, at least for
> the moment.
>
> > I notice when I have a unit in BACKUP state, when I do
> > "ipvsadm" I see all the lvs stuff is configured in the
> > kernel.
> >
> > Does this mean that the unit will try to do load balancing
> > when a connection comes in instead of just ignoring it and
> > allowing the proxy server's user space software to process
> > it?
>
> usually a director in backup state doesn't have the VIP, so
> there are no packets for it to ignore. If you sent it packet
> for the VIP backup director would loadbalance them.
>
> > If so, Can I configure keepalived in such a way that the
> > ipvsadm stuff isn't set up until a unit goes to MASTER?
>
> it doesn't take any time to setup ipvsadm, so yes.
>
> > And if so, will the connection state information
> > successfully synchronize?
>
> once the demon starts and lets the partner demon in the
> other director know where it is
>
> Joe
>
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina
> jmack (at) wm7d (dot) net - azimuthal equidistant map
> generator at http://www.wm7d.net/azproj.shtml
> Homepage http://www.austintek.com/ It's GNU/Linux!
>
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