Enforce 20GiB minimum vm_size

README.md

@@ -173,7 +173,7 @@ These are prompted by default via `vars_prompt` in `main.yml`, but can be suppli
 | Variable    | Description                       | Example Value |
 | ----------- | --------------------------------- | ------------- |
 | `vm_id`     | Unique identifier for the VM.     | `101`         |
-| `vm_size`   | Disk size allocated in GB.        | `20`          |
+| `vm_size`   | Disk size allocated in GB (min 20). | `20`        |
 | `vm_memory` | Amount of memory in MB.           | `2048`        |
 | `vm_cpus`   | Number of CPU cores (virtual installs). | `4`      |
 | `vm_ballo`  | Ballooning memory size (optional).| `2048`        |

roles/global_defaults/tasks/main.yml

@@ -52,10 +52,7 @@
           install_type == "physical"
           or (
             vm_size is defined
-            and (
-              (filesystem == "btrfs" and (vm_size | int) >= 10)
-              or (filesystem != "btrfs" and (vm_size | int) >= 20)
-            )
+            and (vm_size | int) >= 20
           )
         )
       - >-
@@ -64,7 +61,10 @@
           or (
             vm_size is defined
             and vm_memory is defined
+            and filesystem is defined
             and (
+              filesystem != "btrfs"
+              or (
                 (vm_size | float)
                 >= (
                   (vm_memory | float / 1024 >= 16.0)
@@ -72,7 +72,8 @@
                       (vm_memory | float / 2048),
                       [vm_memory | float / 1024, 4.0] | max
                     )
-                + 16
+                  + 5.5
+                )
               )
             )
           )