@squigley wrote:
Hi,
I have configured HAProxy with stick tables and syncing between proxies, on 2 hosts using CARP with a shared IP, however when I cause a failover between the hosts by making the CARP IP move, my existing connection via HAProxy gets terminated.
My expectation is that these are being terminated as the tcp connections don’t exist on the CARP slave which takes over, however from my experience using pfSense, with CARP and pf-sync, I know it’s possible to have 2 machines share both an IP, and all the states which exist, in order to do failover and maintain existing connections.
I am wondering if it is possible to use both CARP with pf-sync and HAProxy with stick tables/peering, so that in the case of a CARP failover, the connection between the client and backend server can be maintained.
At the moment I am trying to get pf configured correctly, (and wondering if I have to do something funny like routing/natting the connection back to itself from the CARP ip to HAProxy on localhost)… Is this scenario something that is likely to work, or am I wasting my time, and regardless of what failover method is implemented, the connection is going to be broken when a failover takes place?
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