feat: 🎸 Optimize the VMDK disk size by cleaningup removed data

Zero byte pack and cleanup to optimize the disk size

Author: sriramandev

images/capi/packer/files/ova/scripts/optimize-disk.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Whiteout root
+count=$(df --sync -kP / | tail -n1  | awk -F ' ' '{print $4}')
+count=$((count - 1))
+dd if=/dev/zero of=/tmp/whitespace bs=1M count=$count || echo "dd exit code $? is suppressed";
+rm /tmp/whitespace
+
+# Whiteout /boot
+count=$(df --sync -kP /boot | tail -n1 | awk -F ' ' '{print $4}')
+count=$((count - 1))
+dd if=/dev/zero of=/boot/whitespace bs=1M count=$count || echo "dd exit code $? is suppressed";
+rm /boot/whitespace

images/capi/packer/ova/packer-node.json

@@ -426,6 +426,14 @@
       "type": "ansible",
       "user": "{{user `ssh_username`}}"
     },
+    {
+      "environment_vars": [
+        "ENABLE_DISK_PACKING={{user `enable_disk_packing`}}"
+      ],
+      "execute_command": "if [[ \"${ENABLE_DISK_PACKING}\" == *\"true\"* ]]; then chmod +x {{ .Path }}; sudo {{ .Path }}; fi",
+      "script": "./packer/files/ova/scripts/optimize-disk.sh",
+      "type": "shell"
+    },
     {
       "arch": "{{user `goss_arch`}}",
       "download_path": "{{user `goss_download_path`}}",
@@ -526,6 +534,7 @@
     "resource_pool": "",
     "username": "",
     "vcenter_server": "",
-    "vsphere_guest_os_type": null
+    "vsphere_guest_os_type": null,
+    "enable_disk_packing": "true"
   }
-}
+}