From c5085047591776c8a4ba80e029fdea0a81bee0f2 Mon Sep 17 00:00:00 2001 From: Tommy Date: Sun, 7 Jul 2024 20:52:18 -0700 Subject: [PATCH] Better ZFS properties Signed-off-by: Tommy --- ...sing Native ZFS Encryption with Proxmox.md | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/content/posts/linux/Using Native ZFS Encryption with Proxmox.md b/content/posts/linux/Using Native ZFS Encryption with Proxmox.md index 0820e6c0d..71eb95e31 100644 --- a/content/posts/linux/Using Native ZFS Encryption with Proxmox.md +++ b/content/posts/linux/Using Native ZFS Encryption with Proxmox.md @@ -25,7 +25,7 @@ Load in the `zfs` kernel module: modprobe zfs ``` -Next, follow [this gist](https://gist.github.com/yvesh/ae77a68414484c8c79da03c4a4f6fd55) to encrypt the dataset. You do not need to use any sort of live USB or rescue mode, as the initramfs has all what we need. In case it gets moved or deleted, I will copy and paste it here: +Next, follow [this gist](https://gist.github.com/yvesh/ae77a68414484c8c79da03c4a4f6fd55) to encrypt the dataset. You do not need to use any sort of live USB or rescue mode, as the initramfs has all what we need. In case it gets moved or deleted, I will copy and paste it here (we will make a few changes to better suite our purposes as well): ```sh # Import the old @@ -40,9 +40,12 @@ zfs send -R rpool/ROOT@copy | zfs receive rpool/copyroot # Destroy the old unencrypted root zfs destroy -r rpool/ROOT +# Set better ZFS properties +zpool set autoexpand=on autotrim=on failmode=wait rpool + # Create a new zfs root, with encryption turned on # OR -o encryption=aes-256-gcm - aes-256-ccm vs aes-256-gcm -zfs create -o encryption=on -o keyformat=passphrase rpool/ROOT +zfs create -o acltype=posix -o atime=off -o compression=zstd-3 -o checksum=blake3 -o dnodesize=auto -o encryption=on -o keyformat=passphrase -o overlay=off -o xattr=sa rpool/ROOT # Copy the files from the copy to the new encrypted zfs root zfs send -R rpool/copyroot/pve-1@copy | zfs receive -o encryption=on rpool/ROOT/pve-1 @@ -67,15 +70,17 @@ reboot -f Next, we need to encrypt the `rpool/data` dataset. This is where Proxmox stores virtual machine disks. -Note that the encryption key will be stored inside of the `rpool/ROOT` dataset. Since `rpool/ROOT` is already encrypted, we can safely store it there. The key also has to be exactly 32 bytes. - ```bash # Destroy the original dataset zfs destroy -r rpool/data +``` -# Create a new encryption key -dd if=/dev/random bs=32 count=1 of=/.data.key +Create a diceware passphrase, and save it to `/.data.key`. Then, continue with: + +```bash +# Remove all but ASCII characters +perl -i -pe 's/[^ -~]//g' /.data.key # Set the approprieate permission chmod 400 /.data.key @@ -84,7 +89,7 @@ chmod 400 /.data.key chattr +i /.data.key # Create a new dataset with encryption enabled -zfs create -o encryption=on -o keylocation=file:///.data.key -o keyformat=raw rpool/data +zfs create acltype=posix -o atime=off -o compression=zstd-3 -o checksum=blake3 -o dnodesize=auto -o encryption=on -o keyformat=passphrase -o keylocation=file:///.data.key -o overlay=off -o xattr=sa rpool/data ``` Next, we need to setup a systemd service for automatic unlocking. Put the following inside of `/etc/systemd/system/zfs-load-key.service`