dom-drain-to.sh

#!/bin/bash

###########################
#   _  ____     ____  __    ____   ___  __  __    _    ___ _   _ 
#  | |/ /\ \   / /  \/  |  |  _ \ / _ \|  \/  |  / \  |_ _| \ | |
#  | ' /  \ \ / /| |\/| |  | | | | | | | |\/| | / _ \  | ||  \| |
#  | . \   \ V / | |  | |  | |_| | |_| | |  | |/ ___ \ | || |\  |
#  |_|\_\   \_/  |_|  |_|  |____/ \___/|_|  |_/_/   \_\___|_| \_|
#                                                               
#   ____  ____      _    ___ _   _ 
#  |  _ \|  _ \    / \  |_ _| \ | |
#  | | | | |_) |  / _ \  | ||  \| |
#  | |_| |  _ <  / ___ \ | || |\  |
#  |____/|_| \_\/_/   \_\___|_| \_|
#
#
# v1.0.1
# By: Samuel Lock (github.com/samson4649)
#
# script used to assist in the migration of virtual machine between blade servers
#
###########################

function _fatal(){
	echo "FATAL: $@"
	exit 99
}

let -a DOMAINS
let -a POSITIONAL_ARGS

while [[ $# -gt 0 ]]; do
	key="$1"
	case ${key} in
		-d|--domain)
			DOMAINS+=("$2")
			shift
			shift
			;;
		-r|--remote|--receiver)
			RECEIVING_HOST="$2"
			shift
			shift
			;;
		*)
			POSITIONAL_ARGS+=("$1")
			shift
			;;
	esac
done

# reset positionals 
set -- "${POSITIONAL_ARGS[@]}"

# capture remote server as positional
if [ -z "${RECEIVING_HOST}" ]; then
	if [[ $# -gt 0 ]]; then
		RECEIVING_HOST="$1"
		shift
	else 
		_fatal "Not able to parse receiving host"
	fi
fi


# capture vms as positional
for x in "$@"; do 
	DOMAINS+=( "${x}" )
done

if [[ ${#DOMAINS[@]} -lt 1 ]]; then 
	_fatal "No virtual machines parsed..."
fi
		

# test that KVM_HOST online
if ! ping -c 1 -W 5 ${RECEIVING_HOST} &>/dev/null ; then
	_fatal "Failed to reach kvm host '${RECEIVING_HOST}'" 
fi


# checking that domains exist on this host
for domain in "${DOMAINS[@]}"; do
	virsh list --name | grep -E "^${domain}\$" &>/dev/null \
		|| _fatal "Not able to locate domain '${domain}' on this host"
done

for dom in "${DOMAINS[@]}"; do
	echo "#### Migrating Domain: ${dom} ####" 
	virsh migrate \
		--live \
		--persistent \
		--undefinesource \
		--copy-storage-all \
		--verbose \
		"${dom}" qemu+ssh://${RECEIVING_HOST}/system
done