I've invested in some SSD drives and want to run my Linux KVM guests from them (currently on a SATA array). The current location of the guests is /var/lib/libvirt/images. I have the SSD volume mounted on /mnt/ssd/. The VMs do some calendaring and mail stuff and would rather not power them off to just use a simple copy command while they're cold. How can I move my KVM guests to the /mnt/ssd/images/ directory and update the XML config for KVM? Found a similar question here (How to migrate a running KVM (with full disk copy) to another node?) but it involves moving a guest to another server - I just want to change the directory and move the image.
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Nstevens
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Could you provide you information how you are mounting /var/lib/libvirt/images? If you are using LVM logical volumes, you will be able to move the data to SSD without disruption. – Anderson Medeiros Gomes Apr 05 '20 at 09:42
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This is how the libvirt directory is mounted: `/dev/mapper/areca-libvirt on /var/lib/libvirt type ext4 (rw,noatime,nodiratime,data=ordered)`. It would be helpful to know if there's a way to move the physical image "hot" regardless of LVM. Sometimes I put slower VMs on the SATA partition to save the SSD volume for more intense services or move images around if I have to rebuild/expand an array. – Nstevens Apr 05 '20 at 13:40