Re: [lvs-users] Fallback directive in ldirectord - what does it actually

To: " users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] Fallback directive in ldirectord - what does it actually do?
From: Simon Horman <horms@xxxxxxxxxxxx>
Date: Sat, 19 Jul 2008 18:52:58 +1000
On Sat, Jul 19, 2008 at 03:31:53PM +0800, Simon Oxwell wrote:
> Simon Horman wrote:
> >> So, what is it that I've got misconfigured? Or is it a case of not 
> >> understanding what it is that the fallback directive actually does in 
> >> this case?
> > 
> > Can you try setting apache to listen on
> > 
> > The connections from end-users should have that as their source IP address
> > and port at the time that they are received by apache.
> Yep, I can do that, and that works, but I'm not understanding why it 
> works, particularly as it doesn't seem to matter what port I set in the 
> in fallback directive - works just as well as
> Is it that ipvs passes the packet through the kernel 'normally' (not 
> quite sure of the correct terminology) when the server-address is 
> localhost, rather than rewriting/forwarding the packet when it gets 
> picked up on the INPUT chain?

Yes, that is likely the case.

I did hack up some code a while back to give the behaviour that
you were expecting, but perhaps its not merged. You can easily tell
by running ipvsadm -Ln. If it says, then that is what
it is using, regardless of what you asked for. If that is the case,
could you let me know which kernel version you have (uname -a) and
I'll chase down what became of my patch.


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