linuxkit/tools/mkimage-gcp/make-gcp
Dave Tucker 5bf63f4cc5 tools: Bring back mkimage-gcp
This was incorrectly removed in e782a469d5

Signed-off-by: Dave Tucker <dt@docker.com>
2017-07-03 17:09:55 +01:00

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#!/bin/sh
set -e
mkdir -p /tmp/image
cd /tmp/image
# input is a tarball of kernel and initrd.img on stdin
# output is a compressed tarball of a raw disk image on stdout
mkdir -p files
cd files
# extract. As guestfs base is currently Debian, no compression support
# only if stdin is a tty, if so need files volume mounted...
[ -t 0 ] || tar xf -
INITRD="$(find . -name '*.img')"
KERNEL="$(find . -name kernel -or -name bzImage)"
CMDLINE="$*"
[ "$KERNEL" = "./kernel" ] || mv "$KERNEL" kernel
[ "$INITRD" = "./initrd.img" ] || mv "$INITRD" initrd.img
# clean up subdirectories
find . -mindepth 1 -maxdepth 1 -type d | xargs rm -rf
# should be externally provided as GCP specific
GCP_CONFIG="earlyprintk=ttyS0,115200 console=ttyS0,115200 vsyscall=emulate page_poison=1"
CFG="DEFAULT linux
LABEL linux
KERNEL /kernel
INITRD /initrd.img
APPEND ${CMDLINE}
"
printf "$CFG" > syslinux.cfg
cd ..
tar cf files.tar -C files .
virt-make-fs --size=1G --type=ext4 --partition files.tar disk.raw
guestfish -a disk.raw -m /dev/sda1 <<EOF
upload /usr/lib/SYSLINUX/mbr.bin /mbr.bin
copy-file-to-device /mbr.bin /dev/sda size:440
rm /mbr.bin
extlinux /
part-set-bootable /dev/sda 1 true
EOF
tar cf - disk.raw | gzip -9