Change a VM's IP address in CloudStack

#!/bin/bash

DB="cloud"
USER="root"
PASS="redacted"
SYSTEM_VM_IDENTITY="/root/.ssh/id_rsa.cloud"

# validate arguments
if [ $# -ne 2 ]; then
        echo "Usage: $0 old-address new-address"
        exit 1
fi
for ADDRESS in $1 $2; do
        ipcalc -c $ADDRESS
        if [ $? -ne 0 ]; then
                echo "Invalid IP address"
                exit 2
        fi
done

# script variables
MYSQL_OPTS="-u$USER -p$PASS -B --disable-column-names"
VM_OLD_ADDRESS=$1
VM_NEW_ADDRESS=$2
VM_OLD_ADDRESS_ESCAPED=$(echo $VM_OLD_ADDRESS | sed 's/\./\\\./g')
VM_NEW_ADDRESS_ESCAPED=$(echo $VM_NEW_ADDRESS | sed 's/\./\\\./g')
VM_OLD_ADDRESS_UNDERSCORE=$(echo $VM_OLD_ADDRESS | sed 's/\./_/g')
VM_NEW_ADDRESS_UNDERSCORE=$(echo $VM_NEW_ADDRESS | sed 's/\./_/g')
ROUTER_ADDRESS=$(mysql $MYSQL_OPTS -e "select ip4_address from nics where vm_type='DomainRouter' and ip4_address like '169.254.%';" $DB)

# edit nics table
mysql $MYSQL_OPTS -e "update nics set ip4_address='$VM_NEW_ADDRESS' where ip4_address='$VM_OLD_ADDRESS';" $DB

# edit address entries on router
ssh -i $SYSTEM_VM_IDENTITY -p 3922 root@$ROUTER_ADDRESS "sed -i 's/$VM_OLD_ADDRESS_ESCAPED/$VM_NEW_ADDRESS_ESCAPED/g' /var/lib/misc/dnsmasq.leases"
ssh -i $SYSTEM_VM_IDENTITY -p 3922 root@$ROUTER_ADDRESS "sed -i 's/$VM_OLD_ADDRESS_ESCAPED/$VM_NEW_ADDRESS_ESCAPED/g' /etc/dhcphosts.txt"
ssh -i $SYSTEM_VM_IDENTITY -p 3922 root@$ROUTER_ADDRESS "sed -i 's/$VM_OLD_ADDRESS_UNDERSCORE/$VM_NEW_ADDRESS_UNDERSCORE/g' /etc/dhcphosts.txt"

# restart dnsmasq
ssh -i $SYSTEM_VM_IDENTITY -p 3922 root@$ROUTER_ADDRESS "service dnsmasq restart"

echo "Now reboot the VM or restart the network service in the VM so that it obtains the new address via DHCP."