Add cleanup script to base images

toolkit/imageconfigs/baremetal.json

@@ -57,6 +57,11 @@
             "KernelOptions": {
                 "default": "kernel"
             },
+            "FinalizeImageScripts": [
+                {
+                    "Path": "scripts/cleanup.sh"
+                }
+            ],
             "Hostname": "azure-linux"
         }
     ]

toolkit/imageconfigs/qemu-guest.json

@@ -55,6 +55,11 @@
             "KernelOptions": {
                 "default": "kernel-hci"
             },
+            "FinalizeImageScripts": [
+                {
+                    "Path": "scripts/cleanup.sh"
+                }
+            ],
             "Hostname": "azure-linux"
         }
     ]

toolkit/imageconfigs/scripts/cleanup.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+set -eux
+
+# cleanup symlinks created by the toolkit that are not needed for base images
+if [ -L /srv ]; then
+  echo "Removing /srv symlink"
+  rm /srv
+else
+  echo "/srv symlink does not exist"
+fi
+
+# cleanup any logs that may have been created during the build
+if [ -d /var/log ]; then
+  echo "Clearing /var/log"
+  rm -rf /var/log/*
+else
+  echo "/var/log does not exist"
+fi