global_defs {
   notification_email {          # This should email you when there's a failover, but it's not working right now
     bvan@slac.stanford.edu
   }
   notification_email_from bvan@slac.stanford.edu
   smtp_server smtp.slac.stanford.edu
   smtp_connect_timeout 30
   router_id SCA_WWW             # This is the virtual router ID.
}

vrrp_script chk_nginx {           # The check script
      script "killall -0 nginx"   # Could use curl instead or call out to custom script.
      interval .2                 # execute every .2 seconds
      weight 2                    # This is subtracted from priority below. Highest point count = master
}

vrrp_instance VI_1 {
    state MASTER               
    interface eth0             # The virtual IP address is assigned to eth0
    virtual_router_id 85       # This should be unique per subnet. 85 is fine. If SCS uses keepalived, 
                               #   we may need to coordinate/register this with them.
    priority 101               # This primary machine should have the highest priority, 
                               #   the failover should be at least one point lower.
 
    advert_int 1               # Both of these are for authentication, but it's not really necessary
    authentication {           #   unless we can't trust the computers on the same subnet.
        auth_type PASS
        auth_pass 1111
    }

    virtual_ipaddress {
        134.79.129.86          # This is the sca-www IP address
    }

    track_script {
         chk_nginx             # Tell keepalived there is a script it should execute (Defined above)
    }

   unicast_src_ip 134.79.129.91   # Unicast specific option, this is the IP of the interface keepalived listens on
   unicast_peer {                 # Unicast specific option, this is the IP of the peer instance 
     134.79.129.92
   }
}