Quick LVS HOWTO

Director server

Enable routing:

sysctl net.ipv4.ip_forward = 1

Mangle TFTP packets for LVS:

iptables -t mangle -A PREROUTING -i eth0 -p udp -s 0.0.0.0/0 -d $VIP --dport 69 -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -i eth0 -p udp -s 0.0.0.0/0 -d $VIP --dport 1024:65535 -j MARK --set-mark 1

keepalived.conf

! Configuration File for keepalived

global_defs {
   router_id LVS1
}

vrrp_instance VI_1 {
    interface eth0
    virtual_router_id 50
    nopreempt
    priority 100
    advert_int 1
    virtual_ipaddress {
        $VIP
    }
}

virtual_server fwmark 1 {
    delay_loop 6
    lb_algo wlc
    lb_kind TUN
    persistence_timeout 50
    protocol UDP

    real_server $RIP 69 {
        weight 1
    }
#    real_server $RIP 69 {
#        weight 1
#    }
}

Real server

Enable loopback for VIP

ifconfig lo0 alias $VIP netmask 255.255.255.255
sysctl net.inet.ip.forwarding=1