For an NVMe disk, the process is similar to setting up LVM on a regular disk. You'll need to create partitions, set up LVM, encrypt the logical volumes, and then mount them. Here are the steps to achieve the specified partition layout:
Assuming you are starting with a clean NVMe disk:
Partition the NVMe Disk:
Use a partitioning tool such as gdisk or parted to create the required partitions.
sudo parted /dev/nvme0n1
Within the parted interactive mode:
- Create a GPT partition table (
mklabel gpt).
- Create a 511MB boot partition (
mkpart primary ext4 0% 511M).
- Create the remaining space as the LVM partition (
mkpart primary ext4 511M 100%).
Set Up LVM on NVMe:
Create a physical volume, a volume group, and logical volumes within the LVM partition.
sudo pvcreate /dev/nvme0n1p2
sudo vgcreate myvg /dev/nvme0n1p2
sudo lvcreate -L 16G -n lvswap myvg
sudo lvcreate -L 500M -n lvtmp myvg
sudo lvcreate -l 100%FREE -n lvroot myvg
Encrypt Logical Volumes:
Encrypt the logical volumes using LUKS.
sudo cryptsetup luksFormat /dev/myvg/lvswap
sudo cryptsetup luksFormat /dev/myvg/lvtmp
sudo cryptsetup luksFormat /dev/myvg/lvroot
You'll be prompted to enter a passphrase for each encrypted volume.
Open Encrypted Volumes:
Open the LUKS encrypted volumes.
sudo cryptsetup luksOpen /dev/myvg/lvswap swap
sudo cryptsetup luksOpen /dev/myvg/lvtmp tmp
sudo cryptsetup luksOpen /dev/myvg/lvroot root
Create File Systems:
Create file systems on the mapped devices.
sudo mkswap /dev/mapper/swap
sudo mkfs.ext4 /dev/mapper/tmp
sudo mkfs.ext4 /dev/mapper/root
Mount File Systems:
Mount the root file system and set up other necessary directories.
sudo mount /dev/mapper/root /mnt
sudo mkdir /mnt/boot
sudo mount /dev/nvme0n1p1 /mnt/boot
sudo mkdir /mnt/tmp
sudo mount /dev/mapper/tmp /mnt/tmp
Install the Base System:
Install the base system and essential packages into the mounted root directory.
sudo debootstrap focal /mnt # Replace 'focal' with your desired Ubuntu release
Configure and Chroot:
Configure the system and chroot into the installed base system.
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys
sudo chroot /mnt /bin/bash
From within the chroot environment, configure the system, install a kernel, set up the bootloader (GRUB, for example), and generate the initial ramdisk.
Remember to adapt the commands to your specific needs, distribution, and disk layout. The above steps assume you're using a Debian-based system and GRUB as the bootloader. If you're using a different distribution or bootloader, the steps may vary. Always refer to your distribution's documentation for specific details.
