Hello,
I suggest you put your backup server in a dedicated backend and select
it in the frontend. I guess the same could be done with use-server in
a single backend, but I feel like this is cleaner:
frontend haproxy
option forwardfor
bind server.lab.local:9191
use_backend backup_servers if { nbsrv(backend_servers) lt 2 }
default_backend backend_servers
backend backend_servers
server server1 192.168.239.151:9090 check
server server2 192.168.239.152:9090 check
backend backup_servers
server serverBKP 192.168.17.2:9090 backup
Lukas
On Sat, 19 Feb 2022 at 14:17, Carlos Renato <[email protected]> wrote:
>
> Can anyone help me?
>
> How to create an ACL to use the backup server if a server goes DOWN. So, if
> the two backend servers are UP, I use the registered servers. If one (only
> one) becomes unavailable, traffic is directed to the backup server.
>
> Below my settings.
>
> frontend haproxy
> option forwardfor
> bind server.lab.local:9191
> default_backend backend_servers
>
> backend backend_servers
> server server1 192.168.239.151:9090 check
> server server2 192.168.239.152:9090 check
> server serverBKP 192.168.17.2:9090 backup
>
> Thank you for your help
>
>
>
>
> --
>
>
