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Diffstat (limited to 'appliance/make-initramfs.sh.in')
| -rwxr-xr-x | appliance/make-initramfs.sh.in | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/appliance/make-initramfs.sh.in b/appliance/make-initramfs.sh.in new file mode 100755 index 00000000..248f2e2d --- /dev/null +++ b/appliance/make-initramfs.sh.in @@ -0,0 +1,162 @@ +#!/bin/bash - +# @configure_input@ +# Copyright (C) 2009 Red Hat Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +# This is called from the Makefile to build the initramfs. + +unset CDPATH + +set -e + +cd @top_builddir@ + +modules=" +-i augeas-libs +-i bash +-i binutils +-i coreutils +-i dosfstools +-i file +-i grub +-i iputils +-i kernel +-i lvm2 +-i MAKEDEV +-i module-init-tools +-i net-tools +-i ntfs-3g +-i ntfsprogs +-i procps +-i strace +-i util-linux-ng +-i zerofree +" + +# Decide on names for the final output. These have to match Makefile.am. +output=appliance/initramfs.@REPO@.@host_cpu@.img +koutput=appliance/vmlinuz.@REPO@.@host_cpu@ +rm -f $output +rm -f $koutput + +# Create the basic initramfs. +@FEBOOTSTRAP@ $modules -u @UPDATES@ @REPO@ initramfs @MIRROR@ + +# /sysroot is where the guest root filesystem will be mounted. +@FEBOOTSTRAP_RUN@ initramfs -- mkdir -p --mode=0777 /sysroot + +# Create /tmp if it is missing. +@FEBOOTSTRAP_RUN@ initramfs -- mkdir -p --mode=0777 /tmp + +# Nuke some stuff. The kernel pulls mkinitrd and plymouth which pulls in +# all of Python. Sheez. +(cd initramfs && find -name '*plymouth*' -print0) | + xargs -0 @FEBOOTSTRAP_RUN@ initramfs -- rm -rf +(cd initramfs && find -name '*python*' -print0) | + xargs -0 @FEBOOTSTRAP_RUN@ initramfs -- rm -rf + +# In Fedora >= 11, it pulls in all of Perl from somewhere. Nuke from orbit. +@FEBOOTSTRAP_RUN@ initramfs -- rm -rf /usr/lib/perl5 /usr/lib64/perl5 + +# Anaconda? JPEG images? +@FEBOOTSTRAP_RUN@ initramfs -- rm -rf /usr/lib/anaconda-runtime + +# Modules take up nearly half of the image. It's a rough guess that +# we don't need many drivers (which take up most of the space). +(cd initramfs && find lib/modules/*/kernel \ + -name '*.ko' \ + -a ! -name 'virtio.ko' \ + -a ! -name 'virtio_net.ko' \ + -a ! -name 'virtio_pci.ko' \ + -a ! -name 'virtio_ring.ko' \ + -a ! -name 'ext2.ko' \ + -a ! -name 'ext3.ko' \ + -a ! -name 'ext4*.ko' \ + -a ! -name 'crc16.ko' \ + -a ! -name 'jbd.ko' \ + -a ! -name 'jbd2.ko' \ + -a ! -name 'fuse.ko' \ + -a ! -name 'vfat.ko' \ + -a ! -name 'fat.ko' \ + -a ! -name 'udf.ko' \ + -a ! -name 'crc_itu_t.ko' \ + -a ! -name 'nls_utf8.ko' \ + -a ! -name 'dm-*.ko' \ + -a -print0 ) | + xargs -0 @FEBOOTSTRAP_RUN@ initramfs -- rm + +# Pull the kernel out into the current directory. We don't want it in +# the initramfs image. +cp initramfs/boot/vmlinuz* $koutput +@FEBOOTSTRAP_RUN@ initramfs -- rm -rf boot + +# Minimize the image. +@FEBOOTSTRAP_MINIMIZE@ initramfs + +# Add some missing configuration files. +if [ ! -f initramfs/etc/hosts ]; then + cat > hosts.new <<'__EOF__' +127.0.0.1 guestfs localhost.localdomain localhost +::1 localhost6.localdomain6 localhost6 +__EOF__ + @FEBOOTSTRAP_INSTALL@ initramfs hosts.new /etc/hosts 0644 root.root + rm hosts.new +fi + +if [ ! -f initramfs/etc/fstab ]; then + @FEBOOTSTRAP_RUN@ initramfs -- touch /etc/fstab +fi + +echo nameserver 10.0.2.3 > resolv.conf.new +@FEBOOTSTRAP_INSTALL@ initramfs resolv.conf.new /etc/resolv.conf 0644 root.root +rm resolv.conf.new + +# Create the init script. +cat > init.new <<'__EOF__' +#!/bin/sh +echo Starting /init script ... +PATH=/sbin:/usr/sbin:$PATH +MAKEDEV mem null port zero core full ram tty console fd \ + hda hdb hdc hdd sda sdb sdc sdd loop sd +mount -t proc /proc /proc +mount -t sysfs /sys /sys +mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts +modprobe virtio_pci +modprobe virtio_net +modprobe dm_mod ||: +/sbin/ifconfig lo 127.0.0.1 +/sbin/ifconfig eth0 10.0.2.10 +/sbin/route add default gw 10.0.2.2 +lvm vgscan --ignorelockingfailure +lvm vgchange -ay --ignorelockingfailure +exec guestfsd -f +__EOF__ + +@FEBOOTSTRAP_INSTALL@ initramfs init.new /init 0755 root.root +rm init.new + +# Just in case the kernel isn't looking for /init, make /sbin/init +# be our script, not the real init. +#@FEBOOTSTRAP_RUN@ initramfs -- ln -f /init /sbin/init + +# Copy the daemon into the filesystem. +@FEBOOTSTRAP_INSTALL@ initramfs daemon/guestfsd /sbin/guestfsd 0755 root.root + +# Generate final image. +@FEBOOTSTRAP_TO_INITRAMFS@ initramfs > $output-t +mv $output-t $output +ls -lh $output +ls -lh $koutput |