3 # Copyright (C) 2009 Red Hat Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 # This is called from the Makefile to build the initramfs.
49 # Decide on names for the final output. These have to match Makefile.am.
50 output=appliance/initramfs.@REPO@.@host_cpu@.img
51 koutput=appliance/vmlinuz.@REPO@.@host_cpu@
55 # Create the basic initramfs.
56 @FEBOOTSTRAP@ $modules -u @UPDATES@ @REPO@ initramfs @MIRROR@
58 # /sysroot is where the guest root filesystem will be mounted.
59 @FEBOOTSTRAP_RUN@ initramfs -- mkdir -p --mode=0777 /sysroot
61 # Create /tmp if it is missing.
62 @FEBOOTSTRAP_RUN@ initramfs -- mkdir -p --mode=0777 /tmp
64 # Nuke some stuff. The kernel pulls mkinitrd and plymouth which pulls in
65 # all of Python. Sheez.
66 (cd initramfs && find -name '*plymouth*' -print0) |
67 xargs -0 @FEBOOTSTRAP_RUN@ initramfs -- rm -rf
68 (cd initramfs && find -name '*python*' -print0) |
69 xargs -0 @FEBOOTSTRAP_RUN@ initramfs -- rm -rf
71 # In Fedora >= 11, it pulls in all of Perl from somewhere. Nuke from orbit.
72 @FEBOOTSTRAP_RUN@ initramfs -- rm -rf /usr/lib/perl5 /usr/lib64/perl5
74 # Anaconda? JPEG images?
75 @FEBOOTSTRAP_RUN@ initramfs -- rm -rf /usr/lib/anaconda-runtime
77 # Modules take up nearly half of the image. It's a rough guess that
78 # we don't need many drivers (which take up most of the space).
79 (cd initramfs && find lib/modules/*/kernel \
81 -a ! -name 'virtio.ko' \
82 -a ! -name 'virtio_net.ko' \
83 -a ! -name 'virtio_pci.ko' \
84 -a ! -name 'virtio_ring.ko' \
85 -a ! -name 'ext2.ko' \
86 -a ! -name 'ext3.ko' \
87 -a ! -name 'ext4*.ko' \
88 -a ! -name 'crc16.ko' \
90 -a ! -name 'jbd2.ko' \
91 -a ! -name 'fuse.ko' \
92 -a ! -name 'vfat.ko' \
95 -a ! -name 'crc_itu_t.ko' \
96 -a ! -name 'nls_utf8.ko' \
97 -a ! -name 'dm-*.ko' \
98 -a ! -name 'cramfs.ko' \
99 -a ! -name 'squashfs.ko' \
100 -a ! -name 'hfsplus.ko' \
101 -a ! -name 'ufs.ko' \
102 -a ! -name 'exportfs.ko' \
103 -a ! -name 'xfs.ko' \
105 xargs -0 @FEBOOTSTRAP_RUN@ initramfs -- rm
107 # Pull the kernel out into the current directory. We don't want it in
108 # the initramfs image.
109 cp initramfs/boot/vmlinuz* $koutput
110 @FEBOOTSTRAP_RUN@ initramfs -- rm -rf boot
112 # Minimize the image.
113 @FEBOOTSTRAP_MINIMIZE@ initramfs
115 # Add some missing configuration files.
116 if [ ! -f initramfs/etc/hosts ]; then
117 cat > hosts.new <<'__EOF__'
118 127.0.0.1 guestfs localhost.localdomain localhost
119 ::1 localhost6.localdomain6 localhost6
121 @FEBOOTSTRAP_INSTALL@ initramfs hosts.new /etc/hosts 0644 root.root
125 if [ ! -f initramfs/etc/fstab ]; then
126 @FEBOOTSTRAP_RUN@ initramfs -- touch /etc/fstab
129 echo nameserver 10.0.2.3 > resolv.conf.new
130 @FEBOOTSTRAP_INSTALL@ initramfs resolv.conf.new /etc/resolv.conf 0644 root.root
133 # Create the init script.
134 cat > init.new <<'__EOF__'
136 echo Starting /init script ...
137 PATH=/sbin:/usr/sbin:$PATH
138 mount -t tmpfs none /dev
139 mkdir /dev/pts /dev/shm /dev/mapper
140 MAKEDEV mem null port zero core full ram tty console fd \
141 hda hdb hdc hdd sda sdb sdc sdd loop sd
142 mknod /dev/ptmx c 5 2; chmod 0666 /dev/ptmx
143 mknod /dev/random c 1 8; chmod 0666 /dev/random
144 mknod /dev/urandom c 1 9; chmod 0444 /dev/urandom
145 mount -t proc /proc /proc
146 mount -t sysfs /sys /sys
147 mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts
148 ln -sf /proc/self/fd/0 /dev/stdin
149 ln -sf /proc/self/fd/1 /dev/stdout
150 ln -sf /proc/self/fd/2 /dev/stderr
154 /sbin/ifconfig lo 127.0.0.1
155 /sbin/ifconfig eth0 10.0.2.10
156 /sbin/route add default gw 10.0.2.2
157 lvm vgscan --ignorelockingfailure
158 lvm vgchange -ay --ignorelockingfailure
162 @FEBOOTSTRAP_INSTALL@ initramfs init.new /init 0755 root.root
165 # Just in case the kernel isn't looking for /init, make /sbin/init
166 # be our script, not the real init.
167 #@FEBOOTSTRAP_RUN@ initramfs -- ln -f /init /sbin/init
169 # Copy the daemon into the filesystem.
170 @FEBOOTSTRAP_INSTALL@ initramfs daemon/guestfsd /sbin/guestfsd 0755 root.root
172 # Generate final image.
173 @FEBOOTSTRAP_TO_INITRAMFS@ initramfs > $output-t