[Linux-cluster] lvs + nanny + piranha problem, server notworking

[rhurst at bidmc.harvard.edu]

Just a side thread on our experiences with nanny, there seems to be an
undocumented feature in that you can signal any nanny process with a
SIGUSR1 as an override to shutoff LVS access to the service it is
monitoring, and a SIGUSR2 to always have it enabled regardless of the
monitoring outcome.

These are VERY useful features, especially if you have multiple IPs with
multiple services each -- you might not have the luxury of just
restarting pulse because you need to make a hot change.


On Tue, 2007-11-06 at 15:57 -0500, Lon Hohberger wrote:

> On Tue, 2007-11-06 at 10:16 -0400, jimmy.nimo at pranical.com wrote:
> > I take your recommendation and change the gateway in the real server to
> > 10.11.12.9 (I really think that it has to use the 10.11.12.10 because if you
> > have a backup lvs Router, it change is the virtual ip eth1:1 not the real ip)
> > and don't work either
> 
> I am pretty sure that if you don't have a send_program (i.e. external
> script defined), you need send / expect strings.  Nanny uses these to
> decide what real servers are online so it can then add/remove them
> to/from the real server pool.
> 
> For web,
> 
> virtual http {
>     expect = "HTTP"
>     send = "GET / HTTP/1.0\r\n\r\n"
>     ... 
>     (rest of virtual server def.)
>     ...
> }
> 
> Also you don't have the backup server enabled, so director failover
> won't happen.
> 
> 
> -- Lon
> 
> --
> Linux-cluster mailing list
> Linux-cluster at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-cluster


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