rdns creation script for foreman hooks https://github.com/theforeman/foreman_hooks. More information at: http://www.brian2.net/posts/foreman_hooks_aws_vpc/

rdns.sh

#!/bin/bash
. /usr/share/foreman/config/hooks.d/lib/utils.sh
. $FOREMAN_HOME/config/hooks.d/lib/hook_functions.sh
set -x
IP=$(hook_data host.ip)
DNSNAME=$(hook_data host.name)
REVERSE=$(reverseIp ${IP})

rdns_create() {
    echolog IP ${IP} calling nsupdate: dns3.server.name update add ${REVERSE}.in-addr.arpa. 86400 PTR $DNSNAME 
cat << EOF | nsupdate -y 'VIEW******************'
server dns.server.name
update add ${REVERSE}.in-addr.arpa. 86400 PTR $DNSNAME
send
quit
EOF
} 

rdns_destroy() { 
    echolog IP: $IP calling nsupdate: dns.server.name update delete ${REVERSE}.in-addr.arpa. PTR $DNSNAME 
cat << EOF | nsupdate -y 'VIEW******************'
server dns.server.name
update delete ${REVERSE}.in-addr.arpa. PTR $DNSNAME
send
quit
EOF
}

case "$HOOK_EVENT" in
        create)
                rdns_create
        ;;
        destroy)
                rdns_destroy
        ;;
        update)
                echolog no action for update
        ;;
        *)
                echo "Usage: run_hooks {create|destroy|update}"
                exit 1
        ;;
esac

exit 0