KVM notes

Tue, 07 Nov 2023 04:12:07 +0100

KVM notes

Check if the CPU supports virtualization:

egrep -c '(vmx|svm)' /proc/cpuinfo
lscpu | grep Virtualization

Install KVM

sudo apt install qemu-kvm qemu-utils libvirt-daemon-system libvirt-clients virtinst virt-manager

Check Virtualization

systemctl status libvirtd
systemctl --now enable libvirtd

Check qemu and virsh:

kvm --version
virsh --version

Components that can be used

sudo virt-host-validate

Check IOMMU

dmesg | grep -e DMAR -e IOMMU

Edit /etc/default/grub if WARN (IOMMU not enabled)

GRUB_CMDLINE_LINUX="intel_iommu=on" add this line to /etc/default/grub and sudo update-grub

LVM Add Disk (work notes)

Fri, 23 Sep 2022 00:00:00 +0100

Introduction & Explanation (pasted)

Why LVM?

The reason why we love LVM is because when you need to increase the space it’s really easy. If you have vanilla EXT4 and you want to enlarge it, then you need to work out extents and at this point we feel it’s too complicated and technical. See here if you simply want to add a new EXT4 disk without LVM.

Below are the commands used to get the whole operation going.

Debian on csegura

KVM notes

KVM notes

LVM Add Disk (work notes)

Introduction & Explanation (pasted)