diskimage-builder/elements/ironic-agent/cleanup.d/99-ramdisk-create
Lucas Alvares Gomes 1181fb8543 Reduce the size of the ironic-agent ramdisk
This patch is reducing the size of the ramdisk image generated by the
ironic-agent element. It does remove extra packages (graphical stuff,
dev stuff, miscs, docs, etc...) and purges directories that are not
needed for a ramdisk (like /boot since it boots using an external
kernel)

Currently it was tested generating a Fedora 22 image and reduced the
size of the final image from 464 MB to 211MB compacted (54% decrease).

I was able to boot a VM with 1.3 GiB of ram instead of the previous 3 GiB
needed.

Change-Id: Id6333ca5d99716ccad75ea1964896acf371fa72a
2015-08-06 16:34:30 +01:00

25 lines
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#!/bin/bash
if [ "${DIB_DEBUG_TRACE:-0}" -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
[ -n "$TARGET_ROOT" ]
source $_LIB/img-functions
IMAGE_PATH=$(readlink -f $IMAGE_NAME)
cd $TARGET_ROOT
echo "#disabled" > ./tmp/fstab.new
sudo mv ./tmp/fstab.new ./etc/fstab
sudo ln -s ./sbin/init ./
sudo find . -path ./sys -prune -o -path ./proc -prune -o -path './tmp/*' -prune -o -path './boot/*' -prune -o -path './root/*' -prune -o -path './usr/lib/locale/*' -prune -o -path './usr/share/doc/*' -prune -o -path './usr/share/man/*' -prune -o -path './usr/share/info/*' -prune -o -path './usr/share/licenses/*' -prune -o -path './usr/share/misc/*' -prune -o -print | sudo cpio -o -H newc | gzip > ${IMAGE_PATH}.initramfs
select_boot_kernel_initrd $TARGET_ROOT
sudo cp $BOOTDIR/$KERNEL ${IMAGE_PATH}.vmlinuz