99 lines
3.8 KiB
Bash
Executable File
99 lines
3.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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# export_vm - Exports a VM from a PVC cluster to local files
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2021 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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set -o errexit
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set -o pipefail
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usage() {
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echo -e "Export a VM from a PVC cluster to local files."
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echo -e "Usage:"
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echo -e " $0 <vm> <source_cluster> [<destination_directory>]"
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echo -e ""
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echo -e "Important information:"
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echo -e " * The local user must have valid SSH access to the primary coordinator in the source_cluster."
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echo -e " * The user on the cluster primary coordinator must have 'sudo' access."
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echo -e " * If the VM is not in 'stop' state, it will be shut down."
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echo -e " * Do not switch the cluster primary coordinator while the script is running."
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echo -e " * Ensure you have enough space in <destination_directory> to store all VM disk images."
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}
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fail() {
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echo -e "$@"
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exit 1
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}
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# Arguments
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if [[ -z ${1} || -z ${2} ]]; then
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usage
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exit 1
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fi
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source_vm="${1}"
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source_cluster="${2}"
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if [[ -n "${3}" ]]; then
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destination_directory="${3}"
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else
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destination_directory="."
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fi
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# Verify the cluster is reachable
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pvc -c ${source_cluster} status &>/dev/null || fail "Specified source_cluster is not accessible"
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# Determine the connection IP
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cluster_address="$( pvc cluster list 2>/dev/null | grep -i "^${source_cluster}" | awk '{ print $2 }' )"
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# Attempt to connect to the cluster address
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ssh ${cluster_address} which pvc &>/dev/null || fail "Could not SSH to source_cluster primary coordinator host"
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# Verify that the VM exists
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pvc -c ${source_cluster} vm info ${source_vm} &>/dev/null || fail "Specified VM is not present on the cluster"
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echo "Verification complete."
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# Shut down the VM
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echo -n "Shutting down VM..."
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set +o errexit
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pvc -c ${source_cluster} vm shutdown ${source_vm} &>/dev/null
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shutdown_success=$?
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while ! pvc -c ${source_cluster} vm info ${source_vm} 2>/dev/null | grep '^State' | grep -q -E 'stop|disable'; do
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sleep 1
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echo -n "."
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done
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set -o errexit
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echo " done."
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# Dump the XML file
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echo -n "Exporting VM configuration file... "
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pvc -c ${source_cluster} vm dump ${source_vm} 1> ${destination_directory}/${source_vm}.xml 2>/dev/null
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echo "done".
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# Determine the list of volumes in this VM
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volume_list="$( pvc -c ${source_cluster} vm info --long ${source_vm} 2>/dev/null | grep -w 'rbd' | awk '{ print $3 }' )"
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for volume in ${volume_list}; do
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volume_pool="$( awk -F '/' '{ print $1 }' <<<"${volume}" )"
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volume_name="$( awk -F '/' '{ print $2 }' <<<"${volume}" )"
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volume_size="$( pvc -c ${source_cluster} storage volume list -p ${volume_pool} ${volume_name} 2>/dev/null | grep "^${volume_name}" | awk '{ print $3 }' )"
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echo -n "Exporting disk ${volume_name} (${volume_size})... "
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ssh ${cluster_address} sudo rbd map ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to map volume ${volume}"
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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
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ssh ${cluster_address} sudo rbd unmap ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to unmap volume ${volume}"
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echo "done."
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done
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