fairly unsafe cloudstack upstart script to set hostname

cloudstack-centos6.conf

# cloudstack - Changes hostname
#
# changes hostname to match cloudstack instance name
# centos version (tested on CentOS 6)

description    "Changes hostname" 

start on started network

task

script
    CS_GW=`/sbin/ip route | grep default | awk '{print $3}'`
    CS_NAME=`/usr/bin/curl http://${CS_GW}/latest/local-hostname`
    CUR_NAME=`grep HOSTNAME /etc/sysconfig/network | awk -F= '{print $2}'`
    if [ ${CUR_NAME} != ${CS_NAME} ]; then
      /bin/sed -ie "s/$CUR_NAME/$CS_NAME/g" /etc/sysconfig/network
      /bin/hostname $CS_NAME
    fi
end script

cloudstack-ubuntu.conf

# cloudstack - Changes hostname
#
# changes hostname to match cloudstack instance name
# ubuntu version (tested on oneiric)

description	"Changes hostname"

start on net-device-up

task

script
    CS_GW=`/sbin/ip route | grep default | awk '{print $3}'`
    CS_NAME=`/usr/bin/curl http://${CS_GW}/latest/local-hostname`
    CUR_NAME=`cat /etc/hostname`
    if [ ${CUR_NAME} != ${CS_NAME} ]; then
      /bin/sed -ie "s/$CUR_NAME/$CS_NAME/g" /etc/hosts
      /bin/sed -ie "s/$CUR_NAME/$CS_NAME/g" /etc/hostname
      /bin/hostname -b -F /etc/hostname      
    fi
end script