mirror of
https://codeberg.org/hyperreal/techne
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81 lines
2.0 KiB
Org Mode
81 lines
2.0 KiB
Org Mode
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#+title: QEMU
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#+setupfile: ../org-templates/page.org
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** Take snapshot of VM
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#+begin_src shell
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sudo virsh domblklist vm1
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Target Source
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-----------------------------------------------
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vda /var/lib/libvirt/images/vm1.img
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#+end_src
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#+begin_src shell
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sudo virsh snapshot-create-as \
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--domain vm1 \
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--name guest-state1 \
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--diskspec vda,file=/var/lib/libvirt/images/overlay1.qcow2 \
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--disk-only \
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--atomic \
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--quiesce
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#+end_src
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Ensure ~qemu-guest-agent~ is installed inside the VM. Otherwise omit the ~--quiesce~ flag, but when you restore the VM it will be as if the system had crashed. Not that big of a deal since the VM's OS should flush required data and maintain consistency of its filesystems.
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#+begin_src shell
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sudo rsync -avhW --progress /var/lib/libvirt/images/vm1.img /var/lib/libvirt/images/vm1-copy.img
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#+end_src
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#+begin_src shell
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sudo virsh blockcommit vm1 vda --active --verbose --pivot
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#+end_src
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** Full disk backup of VM
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Start the guest VM:
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#+begin_src shell
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sudo virsh start vm1
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#+end_src
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Enumerate the disk(s) in use:
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#+begin_src shell
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sudo virsh domblklist vm1
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Target Source
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-------------------------------------------------
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vda /var/lib/libvirt/images/vm1.qcow2
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#+end_src
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Begin the backup:
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#+begin_src shell
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sudo virsh backup-begin vm1
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Backup started
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#+end_src
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Check the job status. "None" means the job has likely completed.
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#+begin_src shell
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sudo virsh domjobinfo vm1
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Job type: None
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#+end_src
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Check the completed job status:
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#+begin_src shell
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sudo virsh domjobinfo vm1 --completed
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Job type: Completed
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Operation: Backup
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Time elapsed: 182 ms
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File processed: 39.250 MiB
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File remaining: 0.000 B
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File total: 39.250 MiB
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#+end_src
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Now we see the copy of the backup:
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#+begin_src shell
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sudo ls -lash /var/lib/libvirt/images/vm1.qcow2*
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15M -rw-r--r--. 1 qemu qemu 15M May 10 12:22 vm1.qcow2
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21M -rw-------. 1 root root 21M May 10 12:23 vm1.qcow2.1620642185
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#+end_src
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