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Sysadmin/Migrate virtual machine (view source)
Revision as of 18:21, 27 February 2022
, 18:21, 27 February 2022→Importing a VM from existing disk files
=== Importing a VM from existing disk files ===
=== Importing a VM from existing disk files ===
# virt-install -v --accelerate --nographics --vcpus 2 --name lightwave --ram 1024 --os-type linux --os-variant=ubuntu20.04 --network bridge:br0 --disk vol=boot/lightwave-boot.img,bus=virtio --disk vol=nvme-pool/lightwave-root,bus=virtio --import
# virt-install -v --accelerate --nographics --vcpus 2 --ram 1024 --os-type linux --os-variant=ubuntu20.04 --network bridge:br0 --disk vol=boot/NEWVM-boot.img,bus=virtio --disk vol=nvme-pool/NEWVM-root,bus=virtio --name NEWVM --import
The VM will boot and probably fail to mount the root because the UUID changed.
The new VM will boot and probably fail to mount the root because the UUID changed.
You can fix this by dropping into grub the usual way:
You can fix this by dropping into grub the usual way:
* virsh start --console NEWVM
* press ESC before the kernel starts
* press ESC before the kernel starts
* press e to edit a menu entry
* press e to edit a menu entry
* modify the kernel command line (for example, root=/dev/vdb)
* modify the kernel command line (for example, root=/dev/vdb)
* hit ctrl-x to boot
* hit ctrl-x to boot
After booting, remember to update your grub.cfg and test it:
# update-grub
# reboot
=== How to migrate a file-based guest to LVM (online method) ===
=== How to migrate a file-based guest to LVM (online method) ===