Difference between revisions of "KVM: Create Live backups (snapshot-create-as, blockcommit)"
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Reference document: https://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit | Reference document: https://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit | ||
| − | * Overview: <code>[[virsh snapshot-create-as]]</code> -> [[cp]]/[[rsync]] -> <code>[[virsh blockcommit]]</code> | + | * Overview: <code>[[virsh snapshot-create-as]]</code> -> <code>[[cp]]/[[rsync]]</code> -> <code>[[virsh blockcommit]]</code> |
| Line 14: | Line 14: | ||
2. Take a backup of the '''original disk''': <code>[[cp]]</code> or <code>[[rsync]]</code> | 2. Take a backup of the '''original disk''': <code>[[cp]]</code> or <code>[[rsync]]</code> | ||
| − | 3. <code>[[virsh blockcommit]] VM_TO_BACKUP | + | 3. <code>[[virsh blockcommit]] VM_TO_BACKUP DEVICE_TARGET --active --verbose --pivot</code> |
| − | :<code>[[virsh blockcommit]] VM_TO_BACKUP vda --active --verbose --pivot</code> | + | :<code>[[virsh blockcommit]] VM_TO_BACKUP vda --active --verbose --pivot</code> (--wait) |
| − | == Related | + | == Related terms == |
| − | * <code>[[virsh domblklist]] VM_NAME</code> | + | * <code>[[virsh domblklist]] VM_NAME --details</code> |
* <code>[[virsh dumpxml]]</code> | * <code>[[virsh dumpxml]]</code> | ||
* <code>[[virsh vol-list]] POOL_NAME --details</code> | * <code>[[virsh vol-list]] POOL_NAME --details</code> | ||
| + | * [[Error: unsupported configuration: external snapshot file for disk vda already exists and is not a block device]] | ||
== Activities == | == Activities == | ||
| Line 27: | Line 28: | ||
# Review [[bacula]] solution: http://www.bacula.lat/kvm-hot-online-virtual-machines-backup-with-bacula-bpipe/?lang=en | # Review [[bacula]] solution: http://www.bacula.lat/kvm-hot-online-virtual-machines-backup-with-bacula-bpipe/?lang=en | ||
# Review Veritas [[Netbackup]] support for [[Red Hat Virtualization|RHV]] | # Review Veritas [[Netbackup]] support for [[Red Hat Virtualization|RHV]] | ||
| + | # View [[Eric Blacke]] video: https://www.youtube.com/watch?v=zQK5ANionpU | ||
== See also == | == See also == | ||
Latest revision as of 16:37, 30 September 2020
Reference document: https://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit
- Overview:
virsh snapshot-create-as->cp/rsync->virsh blockcommit
1. Create an external disk snapshot, specify image destination :
virsh snapshot-create-as --domain VM_TO_BACKUP --diskspec vda,file=/export/images/VM_TO_BACKUP_overlay1.qcow2 --disk-only --atomic
--diskspecTo indicate external snapshot and location--disk-onlyDo not save memory information--atomic
2. Take a backup of the original disk: cp or rsync
3. virsh blockcommit VM_TO_BACKUP DEVICE_TARGET --active --verbose --pivot
virsh blockcommit VM_TO_BACKUP vda --active --verbose --pivot(--wait)
Related terms[edit]
virsh domblklist VM_NAME --detailsvirsh dumpxmlvirsh vol-list POOL_NAME --details- Error: unsupported configuration: external snapshot file for disk vda already exists and is not a block device
Activities[edit]
- Review Bash script https://gist.github.com/cabal95/e36c06e716d3328b512b implementing Live Backup and https://gist.github.com/maxim-gorkin/f0e8a2c01a93ca65ad2ad10566a78d72 with logging capabilities, remote destination and rsync usage. (Kvm backup.sh)
- Review bacula solution: http://www.bacula.lat/kvm-hot-online-virtual-machines-backup-with-bacula-bpipe/?lang=en
- Review Veritas Netbackup support for RHV
- View Eric Blacke video: https://www.youtube.com/watch?v=zQK5ANionpU
See also[edit]
- Virsh Snapshots:
virsh snapshot-create-as,virsh snapshot-info,virsh snapshot-list,virsh blockjob,virsh snapshot-revert (Destructive action),virsh snapshot-delete virsh blockcopy,virsh blockjob,virsh blockcommit,virsh domblklist,virsh blockresize,virsh blockpull- KVM, Installation, QEMU,
virsh,virtinst,libguestfs-tools, libvirt, qemu, Red Hat Virtualization (RHV), MacVTap, Virtio, oVirt, KVM services, KVM networking, KVM graphics, CPU, KVM on ARM
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