#!/bin/bash

###enumerate uuid's of all _running_ VMs in the pool
for VM in `xe vm-list is-control-domain=false power-state=running params=uuid | egrep -o "[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}"`
do
    ###(uncomment following line to perform actual shutdown)
    #xe vm-shutdown vm=$VM
    echo $VM > /dev/null
done

###get uuid of pool master - it must be the very last to shut down
MASTER_UUID=`xe pool-list params=master | egrep -o "[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-0-9]{4}-[a-f0-9]{12}"`

###enumerate of all xen hosts in the pool except master
for HOST in `xe host-list params=uuid | egrep -o "[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}"`
do
    if [ $HOST != $MASTER_UUID ]
    then
        ###(uncomment following line to perform actual shutdown)
        #xe host-shutdown host=$HOST
        echo $HOST > /dev/null
    fi
done

###finally shutdown pool master
###(uncomment following line to perform actual shutdown)
#xe host-shutdown host=$HOST