haproxy.cfg

#
# Sample HAProxy configuration to be used with `freno`
#
# Assumptions:
# - freno listens on port `9777`
# - freno runs on freno.service.host01, freno.service.host02, freno.service.host03
#

#
# only the freno leader will respond to /leader-check with `HTTP 200`. The rest will decline with `HTTP 404`
# This setup suggests haproxy only directs traffic to the single active leader.
#
listen freno
    bind  0.0.0.0:9777 process 1
    bind  0.0.0.0:9777 process 2
    bind  0.0.0.0:9777 process 3
    bind  0.0.0.0:9777 process 4
    bind  0.0.0.0:9777 process 5
    bind  0.0.0.0:9777 process 6

    mode http
    option httpchk GET /leader-check
    maxconn 20000
    http-check disable-on-404
    balance first
    retries 1
    timeout connect 1000
    timeout check 300
    timeout server 86400000
    timeout client 60000

    default-server port 9777 fall 1 inter 1000 rise 1 downinter 1000 on-marked-down shutdown-sessions weight 10
    server freno.service.host01 freno.service.host01.mydomain.com:9777 check
    server freno.service.host02 freno.service.host02.mydomain.com:9777 check
    server freno.service.host03 freno.service.host03.mydomain.com:9777 check