Designing High-Availability for Xen Virtual Machines with HP Serviceguard for Linux

# An error occured while stopping vm

echo "ERROR: Xen VM shutdown failed"

retval=0 ;;

# xm command failed with an undocumented error

echo "Unrecoverable error occured "

retval=255 ;;

esac

if (( retval != 0 ))

then

echo "ERROR:" $retval " Function sgx_stop_vm"

echo "ERROR:" $retval " Failed to halt xen vm ${SG_XEN_VM_NAME}"

to_exit=1

}

#######################################################################

###

# sgx_probe_vm_status() is called to probe the status of a running vm;

# it exits only when the vm is completely halted.

# sgx_probe_vm_status is called by sgx_stop_vm to ensure the package is

# completely halted

# probe done using the 'xm list' command

#######################################################################

###

function sgx_probe_vm_status

{

typeset -i retval=0

typeset -i count=${SG_XEN_PROBE_TIMEOUT}

echo "sgx_probe_vm_status"

if [ -x ${SG_XEN_BIN} ]; then

while [ 1 ]; do

${SG_XEN_BIN} list | grep ${SG_XEN_VM_NAME} | awk '{print $5}' | grep -e "r" -e

"b"

case $? in

# Just wait on the Vm to go down completely

count=count-1

if [ $count -le 0 ]; then

# force power down the VM; this is guaranteed to succeed

echo "WARNING:: Attempting force shutdown of the VM"

${SG_XEN_BIN} destroy ${SG_XEN_VM_NAME}

sleep ${SG_XEN_RETRY_INTERVAL}

continue ;;