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Re: [lvs-users] LVSSyncDaemonSwap syncid patch

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] LVSSyncDaemonSwap syncid patch
Cc: Sebastien Termeau <st@xxxxxxxxxxxxxxxx>
From: Simon Horman <horms@xxxxxxxxxxxx>
Date: Sat, 8 Aug 2009 16:56:57 +1000
On Fri, Aug 07, 2009 at 10:12:14AM +0200, Sebastien Termeau wrote:
> On Fri, Aug 7, 2009 at 1:42 AM, Simon Horman <horms@xxxxxxxxxxxx> wrote:
> 
> > On Thu, Aug 06, 2009 at 02:24:26PM +0200, Sebastien Termeau wrote:
> > > Dear LVS users,
> > >
> > > Here is a patch to LVSSyncDaemonSwap.
> > > It adds a syncid parameter allowing you to specify the ipvsadm daemon
> > syncid
> > > in the haresources file like this :
> > >    LVSSyncDaemonSwap::master::eth0::<sync_id>
> > >
> > > The only drawback is that you have to specify the mcast interface in
> > order
> > > to use the syncid parameter.
> > > Your comments are most welcome.
> >
> > Hi Sebastien,
> >
> > My only comment is that if your kernel is new enough that
> > the syncrhonisation daemon supports syncid, then it should
> > also be new enough that you can run the master and backup daemons
> > simultaneously, so there is no need for LVSSyncDaemonSwap on such systems.
> >
> > That said, this change looks good to me and I'm happy to commit it.
> > Could you provide a signed-off-by line as per section 5 of
> > http://linux.yyz.us/patch-format.html ?
> >
> 
> Hi Simon
> 
> Sure, here it is:
>    Signed-off-by: Sebastien Termeau <st@xxxxxxxxxxxxxxxx>

Thanks, I've applied your change to http://hg.linux-ha.org/dev

> To be honest I do not really understand the point of having both master and
> slave running at the same time.
> Ldirectord is only active on one box at any given time so the second master
> seems useless for me.
> How do you start the master and the slave? Do you have a init script for
> this?
> Hearbeat is starting ldirectord when it needs to be started thus I think it
> should also take care of the ipvs sync daemon.

Thats up to you, I just feel that its easier to run them both at boot.

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