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Change partition layout on LUKS encrypted LVM volumes
This serves as a reference on what to do if you have (a) LUKS encrypted disk(s) that contains a LVM layout and you need to alter the partition layout
As usual YMMV
- Back up your data! While everything typically works out, you want to be save, so back up your data (and make sure the backup is readable)
- Boot from stick
- If not installed, install support libraries
sudo apt-get install lvm2 cryptsetup system-config-lvm - If not existing, create your mount points (presuming LVM contains 2 volumes here)
sudo mkdir -p /luksdisk/root
sudo mkdir /luksdisk/home - Probe the drivers
sudo modprobe dm-crypt - Open the volume (it might be a different disk/partition on your system)
sudo cryptsetup luksOpen /dev/sda5 crypt1 - Show the physical volumes
sudo pvscan - Find the volume groups
sudo vgscan --mknodes
sudo vgchange -ay - List them (memorize the name - I presume it is mylvmdisk here)
sudo lvscan - Start the LVM GUI and make all necessary changes
sudo system-config-lvm - When done, mount the volumes
sudo mount /dev/mylvmdisk/root /luksdisk/root
sudo mount /dev/mylvmdisk/home /luksdisk/home
As usual YMMV
