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Better ZFS properties

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Signed-off-by: Tommy <contact@tommytran.io>
This commit is contained in:
Tommy 2024-07-07 20:52:18 -07:00
parent 281f43eabe
commit c508504759
Signed by: Tomster
GPG Key ID: 555C902A34EC968F
1 changed files with 12 additions and 7 deletions
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19
content/posts/linux/Using Native ZFS Encryption with Proxmox.md
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@ -25,7 +25,7 @@ Load in the `zfs` kernel module:
modprobe zfs 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 ```sh
# Import the old # Import the old
@ -40,9 +40,12 @@ zfs send -R rpool/ROOT@copy | zfs receive rpool/copyroot
# Destroy the old unencrypted root # Destroy the old unencrypted root
zfs destroy -r rpool/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 # Create a new zfs root, with encryption turned on
# OR -o encryption=aes-256-gcm - aes-256-ccm vs aes-256-gcm # 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 # 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 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. 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 ```bash
# Destroy the original dataset # Destroy the original dataset
zfs destroy -r rpool/data zfs destroy -r rpool/data
```
# Create a new encryption key Create a diceware passphrase, and save it to `/.data.key`. Then, continue with:
dd if=/dev/random bs=32 count=1 of=/.data.key
```bash
# Remove all but ASCII characters
perl -i -pe 's/[^ -~]//g' /.data.key
# Set the approprieate permission # Set the approprieate permission
chmod 400 /.data.key chmod 400 /.data.key
@ -84,7 +89,7 @@ chmod 400 /.data.key
chattr +i /.data.key chattr +i /.data.key
# Create a new dataset with encryption enabled # 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` Next, we need to setup a systemd service for automatic unlocking. Put the following inside of `/etc/systemd/system/zfs-load-key.service`