• KVM Host Disk Layout

KVM Host Disk Layout

This disk layout has several layers. It uses btrfs, on top of LVM, on top of luks encryption, on top of raid, on top of the disks partitions.

Hardware

Two 16G SSD disks are used for the KVM Host. Two 2T SATA disks are used for the KVM Guests filesystem images.

Mark your disks! Spend time finding your disks S/N. Put a physical sticker on the disk. In the future this will help you identify a failing disk.

KVM Host Disks

Physical Disks and Partitions

sda     16G
sda1   256M
sda2 15360M

sdb     16G
sdb1   256M
sdb2 15360M

Raid

md0 raid1 (sda1, sdb1)
md1 raid1 (sda2, sdb2)

Luks

md1 luks (md1_crypt)

LVM

md1_crypt lvm (vg1)

LVM Volumes

Initially the swap partition was 512M, but it ran full and was increased to 1G.

vg1 root 2G (/dev/vg1/root)
vg1 swap 1G (/dev/vg1/swap)

Filesystems and Mountpoints

/dev/vg1/root /     (btrfs)
/dev/md0      /boot (btrfs)
/dev/vg1/swap       (swap)

KVM Host Disks for Guest Filesystem Images

Physical Disks and Partitions

sdc     2T
sdc1 1856G

sdd     2T
sdd1 1856G

Raid

md2 raid1 (sdc1, sdd1)

Luks

md2 luks (md2_crypt)

LVM

md2_crypt lvm (vg2)

LVM Volumes

vg2 media 4G (/dev/vg2/media)

Filesystems and Mountpoints

/dev/vg2/media /mnt/media (btrfs)