keepalived for DNS

dnscheck

#!/bin/bash 
#$Id: keepalivepin,v 1.2 2006/02/27 07:30:41 hmy Exp hmy $
#use dig check the powerdns's status.
#in the dns database,have a IN TXT RR keepalivepin.vmmatrix.net,content is "AaBbCcDdEeFf"
# Source: http://puppet-manifest-share.googlecode.com/svn/trunk/vmx-puppet/modules/lvs/files/keepalived.dns-pin
#
RR=keepalivepin.vmmatrix.net
[ $# -le 1 ]&&{ echo "usage: ${0} -h <ip>"; exit 126;}
while getopts "h:" OPT;do
        case $OPT in 
                h)host=$OPTARG;;
                *)echo "usage: $0 -h <ip>"&&exit 1;;
        esac
done


dig @${host} txt ${RR}|grep "\<AaBbCcDdEeFf\>" >/dev/null
exit $?

keepalived.conf

vrrp_instance dns_test {
        interface eth0
        state MASTER
        virtual_router_id 51
        priority 100
        authentication {
                auth_type PASS
                auth_pass p4ssw0rd
        }
        virtual_ipaddress {
                10.0.2.16/24 dev eth0
        }
}

# Check for UDP
virtual_server 10.0.2.16 53 {
  delay_loop 6
  lb_algo wlc
  protocol UDP

  real_server 10.0.2.20 53 {
    weight 100
    MISC_CHECK {
      connect_timeout 6
      misc_path "/etc/keepalived/dnscheck -h 10.0.2.20"
    }
  }

  real_server 10.0.2.21 53 {
    weight 100
    MISC_CHECK {
      connect_timeout 6
      misc_path "/etc/keepalived/dnscheck -h 10.0.2.21"
    }
  }

}

# Check for TCP
virtual_server 10.0.2.16 53 {
  delay_loop 6
  lb_algo wlc
  protocol TCP

  real_server 10.0.2.20 53 {
    weight 100
    TCP_CHECK {
      connect_timeout 6
    }
  }

  real_server 10.0.2.21 53 {
    weight 100
    TCP_CHECK {
      connect_timeout 6
    }
  }

}

can i run this configuration without vrrp ?