CARP across two jails on one host?

[Dominik Zyla]

On Thu, Jul 22, 2010 at 12:51:23PM -0400, Aaron Weeden wrote:
> My box is running FreeBSD version 8.1-PRERELEASE.  I've created two
> jails and want them to be able to share an IP address via CARP.  As I
> understand it, each host must use the same VHID and IP address on its
> carp interface in order to work as a failover for the other hosts.
> I'm also under the impression that jails cannot create interfaces, as
> my attempt to run 'ifconfig carp0 create' within a jail returned the
> error 'ifconfig: SIOCIFCREATE2: Operation not permitted'.  I'm
> wondering, then, if it's possible to use CARP for two jails on one
> host, since attempting to create two carp interfaces with the same
> vhid on the parent produces the error 'ifconfig: SIOCSVH: File
> exists'.  Does anyone here have experience running CARP in jails?

You can't run both, MASTER and BACKUP carp instances on the same host.

-- 
Dominik Zyla

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