HAStats communicates with a running HAProxy process through the “stats socket” (not enabled by default). Through this socket you can query stats, reset counters, change server weightings, put servers in maintenance mode, and more.
Add the following to your HAProxy config (see the HAProxy documentation for more details):
# You can specify lower levels to restrict certain commands -- admin allows everything stats socket /var/run/haproxy.sock level admin
$ hastats Tasks: hastats clear # [FUTURE] Clear counter maximums (see --all option) hastats disable [BACKEND] [SERVER] # Put a server into MAINT mode hastats enable [BACKEND] [SERVER] # Remove a server from MAINT mode hastats errors # [FUTURE] Get current error information hastats get_weight [BACKEND]/[SERVER] # [FUTURE] Get a server's weight hastats help [TASK] # Describe available tasks or one specific task hastats info # Get information about the HAProxy process hastats sess # [FUTURE] Get current session information hastats set_weight [BACKEND] [SERVER] [WEIGHT] # [FUTURE] Set a server's weight. Weight is a number or percentage of current weight hastats stat # Get information about all frontends/backends/servers Options: -j, [--json] # Return results in JSON for easy parsing -s, [--socket=SOCKET] # Default: /usr/local/var/run/haproxy.sock