keepalive configuration

master

# Define the script used to check if haproxy is still working
vrrp_script chk_haproxy {
    script "killall -0 haproxy"
    interval 2
    weight 2
}

# Define the script used to check if nginx is still working
vrrp_script chk_nginx {
    script "killall -0 nginx"
    interval 2
    weight 2
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 101
    advert_int 1

    # uncomment to send emails on state changes
    # smtp_alert # Activate SMTP notifications  

    authentication {
       auth_type PASS
       auth_pass put_a_password_here
    }

    virtual_ipaddress {
        11.11.11.11/24
    }

    # Use the script above to check if we should fail over
    track_script {
        chk_haproxy
        chk_nginx
   }
}

}

slave

vrrp_script chk_haproxy { # Requires keepalived-1.1.13
    script "killall -0 haproxy" # widely used idiom
    interval 2                  # check every 2 seconds
    weight 2                    # add 2 points of prio if OK
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1

    # uncomment to send emails on state changes
    # smtp_alert # Activate SMTP notifications

    authentication {
        auth_type PASS
        auth_pass put_a_password_here
    }

    virtual_ipaddress {
        11.11.11.11/24
    }

    track_script {
        chk_haproxy
    }
}