sbuild-setup(7)
NAME
sbuild-setup - sbuild setup procedure
DESCRIPTION
sbuild uses chroots to build packages within, to provide a minimal and
consistent build environment. This man page describes the procedure to
create a chroot by hand using debootstrap. These are only guidelines;
depending upon the setup required, several of the steps may be omitted
entirely.
QUICK START
Simply running sbuild-createchroot will perform all the setup steps described in detail below. See the section "sbuild-createchroot" below, as well as sbuild-createchroot(1).
CHROOT SETUP
- This guide sets up a lenny chroot on a powerpc machine. Adjust the
names for other suites and architectures.
- 1. Run debootstrap to create the chroot
- # mkdir -p /srv/chroot/lenny
- The author has each chroot as a separate LVM logical volume (LV). Create and mount an LV here if required:
- # lvcreate -L 4G -n lenny_chroot -Z y hda_vg
- Add to /etc/fstab and mount (see next section for full fstab example). Finally, run debootstrap to create the chroot:
- # debootstrap --variant=buildd lenny /srv/chroot/lenny http://ftp.uk.debian.org/debian/
- 2. Set up additional mounts
- An example /etc/fstab:
- /dev//hda_vg/lenny_chroot \
/srv/chroot/lenny ext3 defaults 0 2
- /dev/pts /srv/chroot/lenny/dev/pts none rw,bind 0 0
tmpfs /srv/chroot/lenny/dev/shm tmpfs defaults 0 0
proc /srv/chroot/lenny/proc proc defaults 0 0
/dev/hda_vg/home \/srv/chroot/lenny/home ext3 quota 0 0 - /tmp /srv/chroot/lenny/tmp none rw,bind 0 0
/etc/passwd /srv/chroot/lenny/etc/passwd none ro,bind 0 0
/etc/shadow /srv/chroot/lenny/etc/shadow none ro,bind 0 0
/etc/group /srv/chroot/lenny/etc/group none ro,bind 0 0
/etc/resolv.conf \/srv/chroot/lenny/etc/resolv.conf \none ro,bind 0 0 - If the bind mountpoints don't exist in the chroot, touch them:
- # touch /srv/chroot/lenny/etc/resolv.conf
- Next, mount them all.
- Depending on your kernel version and security considerations, you may wish to do this part slightly differently. With a Linux kernel, at least version 2.6 is required for bind mounts, and devpts (CONFIG_UNIX98_PTYS) for /dev/pts. Other guides recommend copying the files, but this method keeps them up-to-date at no cost.
- If using sbuild with schroot, passwd, shadow, group, gshadow and resolv.conf can be updated automatically at the start of each build, so no action is required here. schroot can also automatically mount all of the extra filesystems, so all the other mounts may be omitted.
- To disable networking, don't bind mount /etc/resolv.conf. This will prevent APT from working inside the chroot, but prevents package building from having working network access (no nameservers).
- 3. Edit ssoouurrcceess..lliisstt
- Create or edit /srv/chroot/lenny/etc/apt/sources.list, and add all the APT sources required to obtain binary and source packages for your chosen distribution:
- deb http://security.debian.org/ lenny/updates main
deb-src http://security.debian.org/ lenny/updates main - deb http://ftp.uk.debian.org/debian/ lenny main
deb-src http://ftp.uk.debian.org/debian/ lenny main - 4. Configure dchroot or schroot
- This is entirely optional, but will make the chroot environment easier to access and administer.
- For dchroot, add the following line to /etc/dchroot.conf:
- lenny /srv/chroot/lenny
- For schroot, add the a group to /etc/schroot/schroot.conf, for example:
- [lenny]
type=directory
description=Debian lenny (stable)
location=/srv/chroot/lenny
priority=2
groups=root,sbuild
root-groups=sbuild
aliases=stable
run-setup-scripts=true
run-session-scripts=true - 5. Log into chroot
- # dchroot -c lenny
- or
- $ schroot -c lenny -u root
- 6. Set up packages for sbuild
- While running as root inside the chroot:
- # apt-get update
# apt-get dist-upgrade
# apt-get install debconf
# dpkg-reconfigure -plow debconf - Answer the debconf questions as follows:
- interface
choose 6/Noninteractive
- priority
choose 1/Critical
- You only need to run dpkg-reconfigure if you weren't asked the questions during the debconf install. Next, install the packages required for building packages:
- # apt-get install debfoster fakeroot build-essential
# apt-get install makedev
# cd /dev/
# /sbin/MAKEDEV generic
# touch /etc/mtab - For some security, we don't bind mount /dev, so it can't access e.g. USB devices
- 7. sbuild setup
- While running as root inside the chroot:
- # mkdir /build
# chown root:sbuild /build # chmod 02775 /build
# mkdir -p /var/lib/sbuild/srcdep-lock # chown -R root:sbuild /var/lib/sbuild # chmod -R 02775 /var/lib/sbuild - Note that when using sbuild with schroot, this setup is done at the start of each build, so is not required here.
- 8. Finished
- Congratulations! You should now have a fully configured and operational chroot.
SBUILD-CREATECHROOT
This script will automatically perform a number of the steps described
above, including:
· Running debootstrap.
· Setting up APT sources in /etc/apt/sources.list.
· Setting up a minimal /etc/passwd
- · Setting up /build and /var/lib/sbuild with appropriate ownership
- and permissions.
- After it has done this, you do still need to do some manual setup, completing the steps it missed out above, for example.
USER SETUP
- 1. Group membership
- As root, run:
- # sbuild-adduser user
- Alternatively, add the user to the sbuild group by hand:
- # adduser user sbuild
- 2. ~~//..ssbbuuiillddrrcc
- Configure the user's ~/.sbuildrc:
- $ cp /usr/share/doc/sbuild/examples/example.sbuildrc ~user/.sbuildrc
- Edit to set the correct mail address to send log files to, and the correct maintainer name and/or uploader name.
- 3. Build directories
- Create directories to contain packages and log files. (.sbuildrc may have configured different locations; the default build directory is the current directory, and the default $log_dir is ~/logs):
- $ mkdir ~/logs
- 4. Chroot setup
- Chroot setup is handled automatically by schroot.
- 5. Finished
- The user should now be able to run sbuild.
- $ sbuild ...
AUTHORS
Roger Leigh.
COPYRIGHT
Copyright © 2005-2006 Roger Leigh <rleigh@debian.org>
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.