[Fedora-livecd-list] livecd-tools.spec Makefile tools/livecd-iso-to-pxeboot.sh tools/mayflower
Jeremy Katz
katzj at fedoraproject.org
Tue Feb 12 21:27:51 UTC 2008
Makefile | 1
livecd-tools.spec | 1
tools/livecd-iso-to-pxeboot.sh | 129 +++++++++++++++++++++++++++++++++++++++++
tools/mayflower | 3
4 files changed, 133 insertions(+), 1 deletion(-)
New commits:
commit e0f0269d3a8f8f310e7c5fdfb8af45892f419c13
Author: Richard W.M. Jones <rjones at redhat.com>
Date: Tue Feb 12 09:50:32 2008 +0000
Add support for pxeboot
Myself and Chris Lalancette looked into this in some detail and came up
with two different ways to do this. This is the simpler of the two
methods and results in the least invasive changes to livecd-creator --
just a single line patch to mayflower and a 100-or-so-line extra script
called 'livecd-iso-to-pxeboot' which works analogously to
'livecd-iso-to-disk'.
The way it works is to bundle the complete ISO image inside the initrd.
The kernel and (bloated) initrd are downloaded using PXE in the normal
way, and the init script finds and loopback-mounts the ISO image and
booting continues as normal.
diff --git a/Makefile b/Makefile
index b04cba4..050fe88 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,7 @@ install:
$(INSTALL_PROGRAM) -D tools/livecd-creator $(DESTDIR)/usr/bin/livecd-creator
$(INSTALL_PROGRAM) -D tools/image-creator $(DESTDIR)/usr/bin/image-creator
$(INSTALL_PROGRAM) -D tools/livecd-iso-to-disk.sh $(DESTDIR)/usr/bin/livecd-iso-to-disk
+ $(INSTALL_PROGRAM) -D tools/livecd-iso-to-pxeboot.sh $(DESTDIR)/usr/bin/livecd-iso-to-pxeboot
$(INSTALL_PROGRAM) -D tools/mayflower $(DESTDIR)/usr/lib/livecd-creator/mayflower
$(INSTALL_DATA) -D AUTHORS $(DESTDIR)/usr/share/doc/livecd-tools-$(VERSION)/AUTHORS
$(INSTALL_DATA) -D COPYING $(DESTDIR)/usr/share/doc/livecd-tools-$(VERSION)/COPYING
diff --git a/livecd-tools.spec b/livecd-tools.spec
index 7aa5b40..a789460 100644
--- a/livecd-tools.spec
+++ b/livecd-tools.spec
@@ -52,6 +52,7 @@ rm -rf $RPM_BUILD_ROOT
%doc AUTHORS COPYING README HACKING
%{_bindir}/livecd-creator
%{_bindir}/livecd-iso-to-disk
+%{_bindir}/livecd-iso-to-pxeboot
%dir /usr/lib/livecd-creator
/usr/lib/livecd-creator/mayflower
%dir %{_datadir}/livecd-tools
diff --git a/tools/livecd-iso-to-pxeboot.sh b/tools/livecd-iso-to-pxeboot.sh
new file mode 100755
index 0000000..b1ccf5f
--- /dev/null
+++ b/tools/livecd-iso-to-pxeboot.sh
@@ -0,0 +1,129 @@
+#!/bin/bash
+# Convert a live CD iso so that it can be booted over the network
+# using PXELINUX.
+# Copyright 2008 Red Hat, Inc.
+# Written by Richard W.M. Jones <rjones at redhat.com>
+# Based on a script by Jeremy Katz <katzj at redhat.com>
+# Based on original work by Chris Lalancette <clalance at redhat.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Library General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+export PATH=/sbin:/usr/sbin:$PATH
+
+usage() {
+ echo "Usage: livecd-iso-to-pxeboot <isopath>"
+ exit 1
+}
+
+cleanup() {
+ [ -d "$CDMNT" ] && umount $CDMNT && rmdir $CDMNT
+}
+
+exitclean() {
+ echo "Cleaning up to exit..."
+ cleanup
+ exit 1
+}
+
+if [ $(id -u) != 0 ]; then
+ echo "You need to be root to run this script."
+ exit 1
+fi
+
+# Check pxelinux.0 exists.
+if [ ! -f /usr/lib/syslinux/pxelinux.0 ]; then
+ echo "Warning: /usr/lib/syslinux/pxelinux.0 not found."
+ echo "Make sure syslinux or pxelinux is installed on this system."
+fi
+
+while [ $# -gt 1 ]; do
+ case "$1" in
+ *) usage ;;
+ esac
+ shift
+done
+
+ISO="$1"
+
+if [ -z "$ISO" -o ! -e "$ISO" ]; then
+ usage
+fi
+
+if [ -d tftpboot ]; then
+ echo "Subdirectory tftpboot exists already. I won't overwrite it."
+ echo "Delete the subdirectory before running."
+ exit 1
+fi
+
+mkdir tftpboot
+
+# Mount the ISO.
+# FIXME: would be better if we had better mountpoints
+CDMNT=$(mktemp -d /media/cdtmp.XXXXXX)
+mount -o loop "$ISO" $CDMNT || exitclean
+
+trap exitclean SIGINT SIGTERM
+
+# Does it look like an ISO?
+if [ ! -d $CDMNT/isolinux -o ! -f $CDMNT/isolinux/initrd0.img ]; then
+ echo "The ISO image doesn't look like a LiveCD ISO image to me."
+ exitclean
+fi
+
+# Create a cpio archive of just the ISO and append it to the
+# initrd image. The Linux kernel will do the right thing,
+# aggregating both cpio archives (initrd + ISO) into a single
+# filesystem.
+ISOBASENAME=`basename "$ISO"`
+ISODIRNAME=`dirname "$ISO"`
+( cd "$ISODIRNAME" && echo "$ISOBASENAME" | cpio -H newc --quiet -o ) |
+ gzip -9 |
+ cat $CDMNT/isolinux/initrd0.img - > tftpboot/initrd0.img
+
+# Kernel image.
+cp $CDMNT/isolinux/vmlinuz0 tftpboot/vmlinuz0
+
+# pxelinux bootloader.
+if [ -f /usr/lib/syslinux/pxelinux.0 ]; then
+ cp /usr/lib/syslinux/pxelinux.0 tftpboot
+else
+ echo "Warning: You need to add pxelinux.0 to tftpboot/ subdirectory"
+fi
+
+# pxelinux configuration.
+mkdir tftpboot/pxelinux.cfg
+cat > tftpboot/pxelinux.cfg/default <<EOF
+DEFAULT pxeboot
+TIMEOUT 20
+PROMPT 0
+LABEL pxeboot
+ KERNEL vmlinuz0
+ APPEND initrd=initrd0.img root=/$ISOBASENAME rootfstype=iso9660 rootflags=loop
+ONERROR LOCALBOOT 0
+EOF
+
+# All done, clean up.
+umount $CDMNT
+rmdir $CDMNT
+
+echo "Your pxeboot image is complete."
+echo
+echo "Copy tftpboot/ subdirectory to /tftpboot or a subdirectory of /tftpboot."
+echo "Set up your DHCP, TFTP and PXE server to serve /tftpboot/.../pxeboot.0"
+echo
+echo "Note: The initrd image contains the whole CD ISO and is consequently"
+echo "very large. You will notice when pxebooting that initrd can take a"
+echo "long time to download. This is normal behaviour."
+
+exit 0
diff --git a/tools/mayflower b/tools/mayflower
index 2e46098..162d4d4 100755
--- a/tools/mayflower
+++ b/tools/mayflower
@@ -477,7 +477,8 @@ if [ "$shell" == "1" ] ; then
fi
# don't wait for "mtd0" as no device file will appear
-if [ "$root" != "mtd0" ] ; then
+# and don't worry about this if $thingtomount is a regular file
+if [ "$root" != "mtd0" -a ! -f "$thingtomount" ] ; then
# If we don't have the /dev/root link.. ask the user to create..
if [ "$waitforsymlink" != "1" ] ; then
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