At least with linux this is possible, but I assume FreeBSD can do it too…
You could use firewall rules to map static map the connection for a specific host/port to a local always present (even 127.0.0.1) IP and use different local ports for each host. From: Daniel Gentleman [mailto:[email protected]] Sent: Thursday, July 23, 2009 6:30 PM Cc: [email protected] Subject: Re: HAProxy and FreeBSD CARP failover Good idea except ... that HAProxy server load-balances for a couple different sites :( ----- Original Message ----- From: "John Lauro" <[email protected]> To: "Daniel Gentleman" <[email protected]>, [email protected] Sent: Thursday, July 23, 2009 3:23:06 PM GMT -08:00 US/Canada Pacific Subject: RE: HAProxy and FreeBSD CARP failover Only bind to the port so it doesn’t matter if additional addresses are added or removed. From: Daniel Gentleman [mailto:[email protected]] Sent: Thursday, July 23, 2009 6:13 PM To: [email protected] Subject: HAProxy and FreeBSD CARP failover Hi list. I'd like to set up a redundant HAProxy server using CARP failover in FreeBSD so the spare server will automatically snatch up the "listen" IP and balance out our server farm. I can get HAProxy configured, but it won't actually start unless the IP is already bound to the box. Suggestions? (latest haproxy-devel from FreeBSD ports) ---Daniel Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: 270.13.20/2248 - Release Date: 07/22/09 18:00:00 Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: 270.13.20/2248 - Release Date: 07/22/09 18:00:00
