[TASK] Use custom partman recipe

preseed.cfg

@@ -165,7 +165,7 @@ d-i partman-auto/disk string /dev/sda
 # - crypto:  use LVM within an encrypted partition
 d-i partman-auto/method string regular
 
-# Disable swap partition
+# Disable warning about missing swap partition
 d-i partman-basicfilesystems/no_swap boolean false
 
 # If one of the disks that are going to be automatically partitioned
@@ -182,7 +182,13 @@ d-i partman-lvm/confirm_nooverwrite boolean true
 # - atomic: all files in one partition
 # - home:   separate /home partition
 # - multi:  separate /home, /var, and /tmp partitions
-d-i partman-auto/choose_recipe select atomic
+# d-i partman-auto/choose_recipe select atomic
+d-i partman-auto/expert_recipe string noswap :: 1000 50 -1 ext4 \
+     $primary{ } $bootable{ } method{ format } \
+     format{ } use_filesystem{ } filesystem{ ext4 } \
+     mountpoint{ / } \
+    .
+d-i partman-auto/choose_recipe select noswap
 
 # Or provide a recipe of your own...
 # If you have a way to get a recipe file into the d-i environment, you can