Difference between revisions of "Virsh blockcommit"
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↑ https://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit
↑ https://github.com/milkey-mouse/backup-vm/issues/17#issuecomment-547843000
| Line 14: | Line 14: | ||
== Examples == | == Examples == | ||
| − | virsh domblklist MY_DOMAIN_NAME | + | [[virsh domblklist]] MY_DOMAIN_NAME |
[[virsh snapshot-list]] MY_DOMAIN_NAME | [[virsh snapshot-list]] MY_DOMAIN_NAME | ||
Revision as of 19:13, 20 September 2020
virsh blockcommit domain path [bandwidth] [--bytes] [base] [--shallow] [top] [--delete] [--keep-relative] [--wait [--async] [--verbose]] [--timeout seconds] [--active] [{--pivot | --keep-overlay}]
Requires at least QEMU 2.1 and libvirt-1.2.9.[1]
Review your security_driver configuration in /ect/libvirt/qemu.conf. You may need to change it to none to allow virsh blockcommit
security_driver = "none"[2]
Options:
--activeto trigger a two-phase active commit--pivotmaking base the new active image and invalidating top--wait--verbose
Examples
virsh domblklist MY_DOMAIN_NAME virsh snapshot-list MY_DOMAIN_NAME
virsh blockcommit MY_DOMAIN_NAME error: command 'blockcommit' requires <path> option
virsh blockcommit MY_DOMAIN_NAME [hdc|vda|xxx] --active Active Block Commit started
virsh blockcommit MY_DOMAIN_NAME vda --active --pivot Successfully pivoted
virsh blockcommit MY_DOMAIN_NAME hdc --active --pivot error: block copy still active: disk 'hdc' already in active block job Execute: virsh blockjob MY_DOMAIN_NAME hdc --abort
virsh blockcommit MY_DOMAIN_NAME vda --active --pivot Commit aborted
virsh blockcommit MY_DOMAIN_NAME vda --active --pivot --wait --verbose Block commit: [ 22 %] Successfully pivoted
virsh blockcommit MY_DOMAIN_NAME hda --active --pivot error: invalid argument: top '/path/to/libvirt/MY_DOMAIN_NAME.qcow2' in chain for 'hda' has no backing file
Use: virsh domblklist --details to find your block name.
Journalctl errors
Feb 04 16:29:52 SERVER libvirtd[14189]: 2019-11-21 15:08:13.035+0000: 14192: error : qemuDomainBlockCommit:17568 : invalid argument: top '/path/to/file/VM_NAME.qcow2' in chain for 'hda' has no backing file
Feb 04 16:29:52 SERVER libvirtd[14974]: 2020-02-04 12:29:52.421+0000: 14977: error : qemuDomainBlockCommit:17555 : invalid argument: commit of 'hdc' active layer requires active flag
Activities
- Create a KVM Live backup using
virsh snapshot-create-asandvirsh blockcommit - Read https://www.redhat.com/archives/libvirt-users/2015-September/msg00042.html from Eric Blake
Related terms
See also
virsh blockcopy,virsh blockjob,virsh blockcommit,virsh domblklist,virsh blockresize,virsh blockpullvirsh consolevirsh: Storage information, Connecting, Operations, Memory, Snapshots, Networking, CPU, release notes,virsh nodedev-list
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