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| title | tags | date | author | |||
|---|---|---|---|---|---|---|
| Root ZFS Encryption, Mirroring, and Remote Unlocking on Ubuntu |
|
2023-07-26 | Tommy |
While Unbutu supports ZFS on root filesystems with an easy snapshot and rollback mechanism called ZSYS, ZSYS is soon going to be deprecated and the installer does not offer an easy way to setup mirroring. In this guide, I will walk you through how to set up Ubuntu with root on ZFS, mirroring with both the root and EFI partitions, and remote unlocking + boot into a snapshot with ZFSBootMenu.
Partitioning the Disk
Esentially, we need a 512MB ESP partition for ZFSBootMenu and a / partition for the rest of the system. If you are using a single disk, just make those 2 partitions on your disk. If you are planning to do mirroring, set up both on of these partitions on each disk.
There are a variety of tools you can use, but an easy to use one would be cfdisk.
cfdisk /dev/nvme0n1
cfdisk /dev/nvme0n2
Mirroring the ESP partition
While the EFI specs do not support mdadm, we can setup mdadm with metadata v1.0, which will be put at the end of the parition and allows it to boot.
mdadm --create /dev/md0 --level 1 --raid-disks --metadata 1.0 /dev/nvme0n1p1 /dev/nvme0n1p2