HashiCorp Packer build configuration for Babelbox (Debian Installer Demo) VMs.
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babelbox-packer/scripts/minimize.sh

30 lines
1.2 KiB

#!/bin/sh -eux
#Copyright 2012-2014, Chef Software, Inc. (<legal@chef.io>)
#Copyright 2011-2012, Tim Dysinger (<tim@dysinger.net>)
#Licensed under the Apache License, Version 2.0 (the "License");
#you may not use this file except in compliance with the License.
#You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
#Unless required by applicable law or agreed to in writing, software
#distributed under the License is distributed on an "AS IS" BASIS,
#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#See the License for the specific language governing permissions and
#limitations under the License.
echo "Fill with 0 the swap partition to reduce box size"
readonly swapuuid=$(/sbin/blkid -o value -l -s UUID -t TYPE=swap)
readonly swappart=$(readlink -f /dev/disk/by-uuid/"$swapuuid")
/sbin/swapoff "$swappart"
dd if=/dev/zero of="$swappart" bs=1M || echo "dd exit code $? is suppressed"
/sbin/mkswap -U "$swapuuid" "$swappart"
echo "Fill filesystem with 0 to reduce box size"
dd if=/dev/zero of=/EMPTY bs=1M
rm -f /EMPTY
# Block until the empty file has been removed, otherwise, Packer
# will try to kill the box while the disk is still full and that's bad
sync