--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: live-boot-initramfs-tools: Please support building smaller initrd
- From: Benjamin Drung <benjamin.drung@profitbricks.com>
- Date: Thu, 04 Jan 2018 18:28:23 +0100
- Message-id: <151508690321.9996.8821755919537908012.reportbug@konstrukt.pb.local>
Package: live-boot-initramfs-tools
Version: 1:20170623
Severity: normal
Tags: patch
Hi,
Please add several environment variables to strip down the initrd size
(for minimal systems that do not need all features). This allows me to
reduce the initrd size from 8.5 MiB to 8.0 MiB when also using busybox's
mount (see Debian bug #868559) and wget (see Debian bug #885455). A
tested patch is attached.
--
Benjamin Drung
System Developer
Debian & Ubuntu Developer
ProfitBricks GmbH
Greifswalder Str. 207
D - 10405 Berlin
Email: benjamin.drung@profitbricks.com
URL: https://www.profitbricks.de
Sitz der Gesellschaft: Berlin
Registergericht: Amtsgericht Charlottenburg, HRB 125506 B
Geschäftsführer: Achim Weiss, Matthias Steinberg
>From 0e3f0bd0705a8395c93bf212d7b7051fb87319da Mon Sep 17 00:00:00 2001
From: Benjamin Drung <benjamin.drung@profitbricks.com>
Date: Thu, 4 Jan 2018 15:05:37 +0100
Subject: [PATCH] Support building smaller initrd
Add several environment variables to strip down the initrd size (for
minimal systems that do not need all features). This allows me to reduce
the initrd size from 8.5 MiB to 8.0 MiB when also using busybox's
mount (see Debian bug #868559) and wget (see Debian bug #885455).
Signed-off-by: Benjamin Drung <benjamin.drung@profitbricks.com>
---
backend/initramfs-tools/live.hook | 86 +++++++++++++++++++++++----------------
manpages/en/live-boot.7 | 25 ++++++++++++
2 files changed, 77 insertions(+), 34 deletions(-)
diff --git a/backend/initramfs-tools/live.hook b/backend/initramfs-tools/live.hook
index 97f4c5e..41ba7f0 100755
--- a/backend/initramfs-tools/live.hook
+++ b/backend/initramfs-tools/live.hook
@@ -53,12 +53,15 @@ do
done
# udev dependencies
-for FILE in /lib/udev/*_id
-do
- copy_exec "${FILE}"
-done
+if [ "${MINIMAL-}" != "y" ]
+then
+ for FILE in /lib/udev/*_id
+ do
+ copy_exec "${FILE}"
+ done
+fi
-if [ -e /lib/udev/rules.d/60-cdrom_id.rules ]
+if [ -e /lib/udev/rules.d/60-cdrom_id.rules ] && [ "${DISABLE_CDROM-}" != "y" ]
then
mkdir -p "${DESTDIR}/lib/udev/rules.d"
cp -p /lib/udev/rules.d/60-cdrom_id.rules "${DESTDIR}/lib/udev/rules.d"
@@ -103,7 +106,7 @@ manual_add_modules hfsplus
# Filesystem: jffs2
manual_add_modules jffs2
-if [ -x /usr/bin/rsync ]
+if [ -x /usr/bin/rsync ] && [ "${MINIMAL-}" != "y" ]
then
copy_exec /usr/bin/rsync /bin
fi
@@ -120,25 +123,37 @@ manual_add_modules aufs
manual_add_modules overlay
# Filesystem: vfat
-manual_add_modules nls_cp437
-manual_add_modules nls_iso8859-1
-manual_add_modules nls_utf8
-manual_add_modules nls_ascii
-manual_add_modules vfat
+if [ "${DISABLE_FAT-}" != "y" ]
+then
+ manual_add_modules nls_cp437
+ manual_add_modules nls_iso8859-1
+ manual_add_modules nls_utf8
+ manual_add_modules nls_ascii
+ manual_add_modules vfat
+fi
# Filesystem: ntfs
-manual_add_modules ntfs
+if [ "${DISABLE_NTFS-}" != "y" ]
+then
+ manual_add_modules ntfs
+fi
[ "${QUIET}" ] || echo -n " devices"
# Hardware: cdrom
-manual_add_modules ide-cd
-manual_add_modules ide-generic
-manual_add_modules ohci1394
-manual_add_modules sbp2
-manual_add_modules sr_mod
+if [ "${DISABLE_CDROM-}" != "y" ]
+then
+ manual_add_modules ide-cd
+ manual_add_modules ide-generic
+ manual_add_modules ohci1394
+ manual_add_modules sbp2
+ manual_add_modules sr_mod
+fi
# Hardware: usb
-manual_add_modules sd_mod
+if [ "${DISABLE_USB-}" != "y" ]
+then
+ manual_add_modules sd_mod
+fi
# Hardware: network
auto_add_modules net
@@ -194,24 +209,27 @@ then
fi
# FUSE kernel module
-manual_add_modules fuse
-
-# FUSE filesystem: httpfs2
-if [ -x /usr/bin/httpfs2_ssl ]
-then
- [ "${QUIET}" ] || echo -n " httpfs:ssl"
- copy_exec /usr/bin/httpfs2_ssl /bin/httpfs
-elif [ -x /usr/bin/httpfs2 ]
+if [ "${DISABLE_FUSE-}" != "y" ]
then
- [ "${QUIET}" ] || echo -n " httpfs"
- copy_exec /usr/bin/httpfs2 /bin/httpfs
-fi
+ manual_add_modules fuse
-# FUSE filesystem: curlftpfs
-if [ -x /usr/bin/curlftpfs ]
-then
- [ "${QUIET}" ] || echo -n " ftpfs"
- copy_exec /usr/bin/curlftpfs /bin
+ # FUSE filesystem: httpfs2
+ if [ -x /usr/bin/httpfs2_ssl ]
+ then
+ [ "${QUIET}" ] || echo -n " httpfs:ssl"
+ copy_exec /usr/bin/httpfs2_ssl /bin/httpfs
+ elif [ -x /usr/bin/httpfs2 ]
+ then
+ [ "${QUIET}" ] || echo -n " httpfs"
+ copy_exec /usr/bin/httpfs2 /bin/httpfs
+ fi
+
+ # FUSE filesystem: curlftpfs
+ if [ -x /usr/bin/curlftpfs ]
+ then
+ [ "${QUIET}" ] || echo -n " ftpfs"
+ copy_exec /usr/bin/curlftpfs /bin
+ fi
fi
# iSCSI
diff --git a/manpages/en/live-boot.7 b/manpages/en/live-boot.7
index 72184cc..e0ce482 100644
--- a/manpages/en/live-boot.7
+++ b/manpages/en/live-boot.7
@@ -24,6 +24,31 @@ In addition, there are some more boot parameters to influence the behaviour, see
.SS Configuration Files
\fBlive\-boot\fR can be configured (but not activated) through configuration files. Those files can be placed either in the root filesystem itself (/etc/live/boot.conf, /etc/live/boot/*), or on the live media (live/boot.conf, live/boot/*).
+These environment variables can only be set in the configuration files:
+
+.TP
+\fBDISABLE_CDROM\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from CD-ROMs. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel modules for reading CD-ROMs.
+
+.TP
+\fBDISABLE_FAT\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from FAT file systems. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module vfat and some nls_* modules.
+
+.TP
+\fBDISABLE_FUSE\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from FUSE-based file systems. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module fuse and file systems that depend on it (like curlftpfs and httpfs2).
+
+.TP
+\fBDISABLE_NTFS\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from NTFS file systems. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module ntfs.
+
+.TP
+\fBDISABLE_USB\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from USB devices. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module sd_mod.
+
+.TP
+\fBMINIMAL\fR=[\fIy\fR|\fIn\fR]
+Build a minimal initramfs. If set to '\fIy\fR' mkinitramfs will build an initramfs without some udev scripts and without rsync.
.SH OPTIONS
\fBlive\-boot\fR currently features the following parameters.
--
2.14.1
--- End Message ---
--- Begin Message ---
Source: live-boot
Source-Version: 1:20180328
We believe that the bug you reported is fixed in the latest version of
live-boot, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 886337@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Luca Boccassi <bluca@debian.org> (supplier of updated live-boot package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Wed, 28 Mar 2018 20:07:39 +0100
Source: live-boot
Binary: live-boot live-boot-doc live-boot-initramfs-tools
Architecture: source
Version: 1:20180328
Distribution: unstable
Urgency: low
Maintainer: Live Systems Maintainers <debian-live@lists.debian.org>
Changed-By: Luca Boccassi <bluca@debian.org>
Description:
live-boot - Live System Boot Components
live-boot-doc - Live System Boot Components (documentation)
live-boot-initramfs-tools - Live System Boot Components (initramfs-tools backend)
Closes: 856482 868559 877776 884355 884886 885453 885455 885466 886328 886337 892772
Changes:
live-boot (1:20180328) unstable; urgency=low
.
[ Raphaël Hertzog ]
* Fix read-only persistence mode with overlayfs. Closes: #877776
Thanks to Ronny Standtke <ronny.standtke@fhnw.ch> for the patch.
* Add a small warning in the long description that the
package must not be installed on a regular system, but only in
a live image. Closes: #884886
* Strip comments from checksums files passed to "shaXsum -c"
Thanks to Andreas Heinlein for the report (Closes: #856482)
.
[ Steve McIntyre ]
* Repo moved to salsa
.
[ Benjamin Drung ]
* Don't replace busybox's wget by the true wget.
It was likely done for https support but since buster the busybox
provided wget has https support too. We save a lot of space by
doing so (8 Mb). (Closes: #885455)
* Avoid double slashes in some paths (Closes: #885453)
* Support setting upperdir tmpfs size with overlay-size boot parameter
(Closes: #885466)
* Simplify mount point handling by using /run/live instead of /lib/live/mount
(Closes: #886328)
* Add configuration variables to build a stripped down initrd
(Closes: #886337)
.
[ Daniel Reichelt ]
* Use klibc's mount again for fuse mounts (Closes: #868559)
.
[ raizo62 ]
* Update DNSFILE even if DNSFILE contains only commented or empty lines
.
[ Sameer Agrawal ]
* Fix ifconfig parsing (Closes: #892772)
.
[ Chas Williams ]
* Add back persistence fsck option
* Remove workaround for ipconfig issues
.
[ Benjamin Drung ]
* Remove sourcing /scripts/functions in components
* Support live-{top,premount,bottom} hooks (Closes: #884355)
.
[ Luca Boccassi ]
* Add backward compatibility rbind mount /lib/live/mount -> /run/live.
The paths used in the current released versions of live-boot are a
form of public API, and existing applications and scripts might rely
on them. Do a recursive bind mount of the new path on the previous one
so that they do not break on upgrade (see #886328).
This backward-compatible mount point will be deprecated and removed
before the Bullseye (Debian 11) release. Users are recommended to start
migrating to the new /run/live path as soon as possible.
.
[ Erik Ziegenbalg ]
* fromiso: add support for local ISO (ONIE)
.
[ Luca Boccassi ]
* Clarify FROMISO documentation in live-boot manpage
* Use HTTPS in debian/copyright (policy 4.0.0).
* Remove dead link to live-systems.org from debian/copyright.
* Bump Standards-Version to 4.1.3, no changes.
* Add myself to Uploaders.
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