postgres zfs setup

hosts/common/disks/zfs/zspeed.nix

@@ -0,0 +1,72 @@
+{
+  disko.devices = {
+    disk = {
+      x = {
+        type = "disk";
+        device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi0";
+        content = {
+          type = "gpt";
+          partitions = {
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zspeed";
+              };
+            };
+          };
+        };
+      };
+      y = {
+        type = "disk";
+        device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi3";
+        content = {
+          type = "gpt";
+          partitions = {
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zspeed";
+              };
+            };
+          };
+        };
+      };
+    };
+    zpool = {
+      zspeed = {
+        type = "zpool";
+        mode = "mirror";
+        options = {
+          "compression" = "zstd-4";
+          "com.sun:auto-snapshot" = "false";
+          "atime" = "off";
+          "xattr" = "sa";
+          "ashift" = "13";
+        };
+        mountpoint = "/mnt/zfs";
+        postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zspeed@blank$' || zfs snapshot zspeed@blank";
+
+        datasets = {
+          postgres = {
+            type = "zfs_volume";
+            size = "10G";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/mnt/postgres";
+              options = {
+                "com.sun:auto-snapshot:daily" = "true";
+                "atime" = "off";
+                "xattr" = "sa";
+                "ashift" = "13";
+                "recordsize" = "8k";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}

hosts/nebula/default.nix

@@ -13,7 +13,7 @@ in
       # Create users for this host
       ../common/users/${user}
 
-      # Disk configuration
+      # Root disk configuration
       inputs.disko.nixosModules.disko
       (import ../common/disks { device = dev; impermanence = impermanence; fsType = fsType; encrypted = encrypted; })