116 lines
5.1 KiB
Bash
Executable File
116 lines
5.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# migrate_vm - Exports a VM from a PVC cluster to another PVC cluster
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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 another PVC cluster."
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echo -e "Usage:"
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echo -e " $0 <vm> <source_cluster> <destination_cluster> <destination_pool>"
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echo -e ""
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echo -e "Important information:"
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echo -e " * The local user must have valid SSH access to the primary coordinator in the source_cluster."
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echo -e " * The user on the cluster primary coordinator must have 'sudo' access."
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echo -e " * If the VM is not in 'stop' state, it will be shut down."
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echo -e " * Do not switch the cluster primary coordinator on either cluster while the script is running."
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echo -e " * Ensure you have enough space on the target cluster to store all VM disks."
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}
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fail() {
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echo -e "$@"
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exit 1
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}
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# Arguments
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if [[ -z ${1} || -z ${2} || -z ${3} || -z ${4} ]]; then
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usage
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exit 1
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fi
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source_vm="${1}"
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source_cluster="${2}"
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destination_cluster="${3}"
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destination_pool="${4}"
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# Verify each 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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pvc -c ${destination_cluster} status &>/dev/null || fail "Specified destination_cluster is not accessible"
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# Determine the connection IPs
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source_cluster_address="$( pvc cluster list 2>/dev/null | grep -i "^${source_cluster}" | awk '{ print $2 }' )"
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destination_cluster_address="$( pvc cluster list 2>/dev/null | grep -i "^${destination_cluster}" | awk '{ print $2 }' )"
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# Attempt to connect to the cluster addresses
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ssh ${source_cluster_address} which pvc &>/dev/null || fail "Could not SSH to source_cluster primary coordinator host"
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ssh ${destination_cluster_address} which pvc &>/dev/null || fail "Could not SSH to destination_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 source 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 ${source_vm} 2>/dev/null | grep '^State' | grep -q -E 'stop|disable'; do
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sleep 1
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echo -n "."
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done
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set -o errexit
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echo " done."
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tempfile="$( mktemp )"
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# Dump the XML file
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echo -n "Exporting VM configuration file from source cluster... "
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pvc -c ${source_cluster} vm dump ${source_vm} 1> ${tempfile} 2>/dev/null
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echo "done."
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# Import the XML file
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echo -n "Importing VM configuration file to destination cluster... "
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pvc -c ${destination_cluster} vm define ${tempfile}
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echo "done."
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rm -f ${tempfile}
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# Determine the list of volumes in this VM
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volume_list="$( pvc -c ${source_cluster} vm info --long ${source_vm} 2>/dev/null | grep -w 'rbd' | awk '{ print $3 }' )"
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# Parse and migrate each volume
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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 "Transferring disk ${volume_name} (${volume_size})... "
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pvc -c ${destination_cluster} storage volume add ${destination_pool} ${volume_name} ${volume_size} 2>/dev/null
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ssh ${source_cluster_address} sudo rbd map ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to map volume ${volume} on source cluster"
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ssh ${destination_cluster_address} sudo rbd map ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to map volume ${volume} on destination cluster"
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ssh ${source_cluster_address} sudo dd if="/dev/rbd/${volume_pool}/${volume_name}" bs=1M 2>/dev/null | pv | ssh ${destination_cluster_address} sudo dd bs=1M of="/dev/rbd/${destination_pool}/${volume_name}" 2>/dev/null
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ssh ${source_cluster_address} sudo rbd unmap ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to unmap volume ${volume} on source cluster"
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ssh ${destination_cluster_address} sudo rbd unmap ${volume_pool}/${volume_name} &>/dev/null || fail "Failed to unmap volume ${volume} on destination cluster"
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done
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if [[ ${shutdown_success} -eq 0 ]]; then
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pvc -c ${destination_cluster} vm start ${source_vm}
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fi
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