enode: disk setup, minor fixes

1 files changed, 36 insertions, 0 deletions

diff --git a/hosts/enode/impermenance.nix b/hosts/enode/impermenance.nix
new file mode 100644
index 0000000..9915bb1
--- /dev/null
+++ b/hosts/enode/impermenance.nix
@@ -0,0 +1,36 @@
+{ lib, ... }: {
+  boot.initrd.postDeviceCommands = lib.mkAfter ''
+    echo "Rollback running" > /mnt/rollback.log
+    mkdir -p /mnt
+    mount -t btrfs /dev/mapper/cryptroot /mnt
+
+    # Recursively delete all nested subvolumes inside /mnt/root
+    btrfs subvolume list -o /mnt/root | cut -f9 -d' ' | while read subvolume; do
+      echo "Deleting /$subvolume subvolume..." >> /mnt/rollback.log
+      btrfs subvolume delete "/mnt/$subvolume"
+    done
+
+    echo "Deleting /root subvolume..." >> /mnt/rollback.log
+    btrfs subvolume delete /mnt/root
+
+    echo "Restoring blank /root subvolume..." >> /mnt/rollback.log
+    btrfs subvolume snapshot /mnt/root-blank /mnt/root
+
+    umount /mnt
+  '';
+
+  # Use /persist as the persistence root, matching Disko's mountpoint
+  environment.persistence."/persist" = {
+    hideMounts = true;
+    directories = [
+      "/var/lib/backups"
+      "/var/lib/headscale"
+      "/var/lib/caddy" # for certs
+    ];
+    files = [
+      "/etc/machine-id"
+      "/etc/shadow"
+      "/etc/passwd"
+    ];
+  };
+}