Auto-mounting encrypted drives with a remote key on Linux

This article provides a technical tutorial for auto-mounting dm-crypt/LUKS encrypted secondary drives on Linux at boot without storing the encryption key locally. It addresses the security risk of keeping a keyfile on the same system by using a remote key storage solution, such as Azure Blob Storage. The guide details generating a 256-bit keyfile, storing it remotely, creating a script to fetch and decode the key, and configuring two systemd units to automate the mount process. It is aimed at users building home NAS systems or similar setups, focusing on Linux system administration, encryption, and automation.