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(Last edited by Blt on 26 Jul 2022.)

This guide is to explain step by step how to setup Alpine Linux with Full Disk Encryption using LUKS2, /boot & / together on the same partition on a nvme drive, with UEFI & Secure Boot.

Sequence of Events

Installing packages
Partitioning the disk
Configuring LUKS
Installing Alpine
Configuring Secure Boot

Installing packages

To facilitate the partitioning we will use gdisk :

# apk add gptfdisk

For encryption, we will use cryptsetup :

# apk add cryptsetup

For using and managing UEFI, multiple packages are needed :

# apk add e2fsprogs grub grub-efi

Partitioning the disk

Let's assume the disk is /dev/nvme0n1 and no partitions are present, we will create two partitions only : one for UEFI, one for /

# gdisk /dev/nvme0n1
Command (? for help): n
Partition number (1-128, default 1): 
First sector (2048-1000215182, default = 2048) or {+-}size{KMGTP}: 
Last sector (2048-1000215182, default = 1000214527) or {+-}size{KMGTP}: 512M
Hex code or GUID (L to show codes, Enter = 8300): ef00
Changed type of partition to 'EFI system partition'

Command (? for help): n
Partition number (2-128, default 2): 
First sector (1048577-1000215182, default = 1050624) or {+-}size{KMGTP}: 
Last sector (1050624-1000215182, default = 1000214527) or {+-}size{KMGTP}: 
Current type is 8300 (Linux filesystem)
Hex code or GUID (L to show codes, Enter = 8300): 8309
Changed type of partition to 'Linux LUKS'

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

Do you want to proceed? (Y/N): Y
OK; writing new GUID partition table (GPT) to /dev/nvme0n1.
The operation has completed successfully.