update telchar disk settings to btrfs

flake.nix

@@ -177,7 +177,7 @@
               inputs.nixos-hardware.nixosModules.framework-16-7040-amd
               ./nixos/profiles/hw-framework-16-7840hs.nix
               disko.nixosModules.disko
-              (import ./nixos/profiles/disko-nixos.nix { disks = [ "/dev/nvme0n1" ]; })
+              (import ./nixos/profiles/disko-telchar.nix { disks = [ "/dev/nvme0n1" ]; })
               lix-module.nixosModules.default
             ];
             profileModules = [

nixos/hosts/telchar/default.nix

@@ -18,28 +18,6 @@
     extraModulePackages = [ ];
   };
 
-  fileSystems = {
-    "/" = {
-      device = "zroot/root";
-      fsType = "zfs";
-    };
-
-    "/nix" = {
-      device = "zroot/nix";
-      fsType = "zfs";
-    };
-
-    "/var" = {
-      device = "zroot/var";
-      fsType = "zfs";
-    };
-
-    "/home" = {
-      device = "zroot/home";
-      fsType = "zfs";
-    };
-  };
-
   swapDevices = [ ];
   virtualisation.docker.enable = true;
 
@@ -57,13 +35,6 @@
       borg.pika-backup.enable = true;
     };
 
-    # Services config
-    services = {
-      vault = {
-        enable = false;
-      };
-    };
-
     framework_wifi_swap.enable = true;
     security._1password.enable = true;
   };

nixos/profiles/disko-telchar.nix

@@ -0,0 +1,56 @@
+{
+  disko.devices = {
+    disk = {
+      main = {
+        type = "disk";
+        device = "/dev/disk/by-diskseq/1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              priority = 1;
+              name = "ESP";
+              start = "1M";
+              end = "128M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+              };
+            };
+            root = {
+              size = "100%";
+              content = {
+                type = "btrfs";
+                extraArgs = [ "-f" ]; # Override existing partition
+                # Subvolumes must set a mountpoint in order to be mounted,
+                # unless their parent is mounted
+                subvolumes = {
+                  # Subvolume name is different from mountpoint
+                  "/rootfs" = {
+                    mountpoint = "/";
+                  };
+                  # Subvolume name is the same as the mountpoint
+                  "/home" = {
+                    mountOptions = [ "compress=zstd" ];
+                    mountpoint = "/home";
+                  };
+                  # Sub(sub)volume doesn't need a mountpoint as its parent is mounted
+                  "/home/user" = { };
+                  # Parent is not mounted so the mountpoint must be set
+                  "/nix" = {
+                    mountOptions = [ "compress=zstd" "noatime" ];
+                    mountpoint = "/nix";
+                  };
+                };
+
+                mountpoint = "/partition-root";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}