From 829c112dd10c40da0de60503164f826429c8de75 Mon Sep 17 00:00:00 2001
From: mikepell <mikepell@pellegq.com>
Date: Tue, 5 Jul 2022 15:34:06 +0000
Subject: [PATCH] adding zero drive back

some hypervisors will need manual virt-sparsify or equivalent
---
 prepare-ubuntu-18.04-template.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/prepare-ubuntu-18.04-template.sh b/prepare-ubuntu-18.04-template.sh
index b4febe3..cbcec11 100755
--- a/prepare-ubuntu-18.04-template.sh
+++ b/prepare-ubuntu-18.04-template.sh
@@ -98,6 +98,10 @@ sudo sed -ri '/\sswap\s/s/^#?/#/' /etc/fstab
 # cleans out all of the cloud-init cache / logs - this is mainly cleaning out networking info
 sudo cloud-init clean --logs
 
+# zero out drive
+dd if=/dev/zero of=EMPTY bs=1M status=progress
+rm EMPTY
+fstrim -av
 
 #cleanup shell history
 cat /dev/null > ~/.bash_history && history -c