pvc/client-cli/scripts/export_vm

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#!/usr/bin/env bash
# export_vm - Exports a VM from a PVC cluster to local files
# Part of the Parallel Virtual Cluster (PVC) system
#
# Copyright (C) 2018-2020 Joshua M. Boniface <joshua@boniface.me>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
###############################################################################
set -o errexit
set -o pipefail
usage() {
echo -e "Export a VM from a PVC cluster to local files."
echo -e "Usage:"
echo -e " $0 <vm> <source_cluster> [<destination_directory>]"
echo -e ""
echo -e "Important information:"
echo -e " * The local user must have valid SSH access to the primary coordinator in the source_cluster."
echo -e " * The user on the cluster primary coordinator must have 'sudo' access."
echo -e " * If the VM is not in 'stop' state, it will be shut down."
echo -e " * Do not switch the cluster primary coordinator while the script is running."
echo -e " * Ensure you have enough space in <destination_directory> to store all VM disk images."
}
fail() {
echo -e "$@"
exit 1
}
# Arguments
if [[ -z ${1} || -z ${2} ]]; then
usage
exit 1
fi
source_vm="${1}"
source_cluster="${2}"
if [[ -n "${3}" ]]; then
destination_directory="${3}"
else
destination_directory="."
fi
# Verify the cluster is reachable
pvc -c ${source_cluster} status &>/dev/null || fail "Specified source_cluster is not accessible"
# Determine the connection IP
cluster_address="$( pvc cluster list 2>/dev/null | grep -i "^${source_cluster}" | awk '{ print $2 }' )"
# Attempt to connect to the cluster address
ssh ${cluster_address} which pvc &>/dev/null || fail "Could not SSH to source_cluster primary coordinator host"
# Verify that the VM exists
pvc -c ${source_cluster} vm info ${source_vm} &>/dev/null || fail "Specified VM is not present on the cluster"
echo "Verification complete."
# Shut down the VM
echo -n "Shutting down VM..."
set +o errexit
pvc -c ${source_cluster} vm shutdown ${source_vm} &>/dev/null
shutdown_success=$?
while ! pvc -c ${source_cluster} vm info ${source_vm} 2>/dev/null | grep '^State' | grep -q -E 'stop|disable'; do
sleep 1
echo -n "."
done
set -o errexit
echo " done."
# Dump the XML file
echo -n "Exporting VM configuration file... "
pvc -c ${source_cluster} vm dump ${source_vm} 1> ${destination_directory}/${source_vm}.xml 2>/dev/null
echo "done".
# Determine the list of volumes in this VM
volume_list="$( pvc -c ${source_cluster} vm info --long ${source_vm} 2>/dev/null | grep -w 'rbd' | awk '{ print $3 }' )"
for volume in ${volume_list}; do
volume_pool="$( awk -F '/' '{ print $1 }' <<<"${volume}" )"
volume_name="$( awk -F '/' '{ print $2 }' <<<"${volume}" )"
volume_size="$( pvc -c ${source_cluster} storage volume list -p ${volume_pool} ${volume_name} 2>/dev/null | grep "^${volume_name}" | awk '{ print $3 }' )"
echo -n "Exporting disk ${volume_name} (${volume_size})... "
ssh ${cluster_address} sudo rbd map ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to map volume ${volume}"
ssh ${cluster_address} sudo dd if="/dev/rbd/${volume_pool}/${volume_name}" bs=1M 2>/dev/null | dd bs=1M of="${destination_directory}/${volume_name}.img" 2>/dev/null
ssh ${cluster_address} sudo rbd unmap ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to unmap volume ${volume}"
echo "done."
done