Difference between revisions of "Development Team/Chroot"
Line 136: | Line 136: | ||
sudo chroot $CHROOT /bin/bash -l | sudo chroot $CHROOT /bin/bash -l | ||
su sugar - | su sugar - | ||
+ | cd ~ | ||
+ | ulimit -c unlimited | ||
export DISPLAY=localhost:1 | export DISPLAY=localhost:1 | ||
export DBUS_SESSION_BUS_ADDRESS=$(dbus-daemon --session --print-address --fork) | export DBUS_SESSION_BUS_ADDRESS=$(dbus-daemon --session --print-address --fork) |
Revision as of 14:30, 1 August 2009
Status
- Sugar continues to run happily in Squeeze chroots. --Michael Stone 16:30, 3 July 2009 (UTC)
- Sugar is now somewhat runnable from chroots. Jaunty and Squeeze have been tested recently; Fedora has not. --Michael Stone 22:21, 23 May 2009 (UTC)
Chroot Construction
There are lots of ways to create appropriate chroots; e.g. by hand, with debootstrap, with mock, etc.
Here are some ideas to help you get started:
Ubuntu jaunty chroot
With recent versions of debootstrap, in order to get a working chroot, you want something like:
export CHROOT=`pwd`/jaunty-root sudo debootstrap --arch i386 jaunty $CHROOT http://ubuntu.media.mit.edu/ubuntu/ sudo chroot $CHROOT /bin/bash -l mount -t proc proc /proc mount -t devpts devpts /dev/pts
Debian squeeze chroot
With debootstrap, in order to get a working chroot, you want something like:
export CHROOT=`pwd`/sid-root sudo debootstrap --arch i386 squeeze $CHROOT http://debian.lcs.mit.edu/debian sudo chroot $CHROOT /bin/bash -l # and some of the following: mount -t tmpfs tmpfs $CHROOT/tmp mount -t proc proc $CHROOT/proc mount -t devpts devpts $CHROOT/dev/pts mount -t selinuxfs selinux $CHROOT/selinux
Reference: http://www.debian.org/doc/manuals/reference/ch-tips.en.html
Note: you can use approx to cache packages across multiple runs for faster testing:
apt-get install approx echo 'debian http://debian.lcs.mit.edu/debian' >> /etc/approx/approx.conf /etc/init.d/approx restart sudo debootstrap --arch i386 squeeze $CHROOT http://localhost:9999/debian
Fedora rawhide chroot
With mock, it would be more like:
mock -r fedora-devel-i386 --init mock -r fedora-devel-i386 --install yum mock -r fedora-devel-i386 --shell
Gentoo chroot
Well, if you are familiar with regular Gentoo installation process(by using Handbook instead of GUI stuff) you should know how to setup Gentoo chtoot :). Otherwise use these instructions.
- Firstly, you need Gentoo stage tarball. You can borrow it from any mirror (use releases/<platform>/current sub directory).
- Lets think you are using stage3-i686-20090623.tar.bz2, then:
mkdir chroot-gentoo tar xjpf stage3-i686-20090623.tar.bz2 -C chroot-gentoo mount -o bind /dev chroot-gentoo/dev mount -o bind /proc chroot-gentoo/proc chroot chroot-gentoo /bin/bash
- To install sugar, use sugar-overlay or setup sugar-jhbuild environment(with sugar-overlay you can install git packages as well).
Sugar Installation
jaunty chroot
sed -ie "s/main/main universe/" /etc/apt/sources.list apt-get update apt-get install locales locale-gen "$LANG" dpkg-reconfigure tzdata apt-get install sugar sugar-activities # install your development tools here # patch (hopefully temporary) bugs sed -ie '114i\\ if not favorites_settings.layout: favorites_settings.layout = favoriteslayout.RingLayout.key' /usr/lib/python2.6/dist-packages/jarabe/desktop/favoritesview.py
squeeze chroot
apt-get update apt-get install locales dpkg-reconfigure locales # edit /etc/hosts
apt-get install education-desktop-sugar # install your development tools here # fix broken hippocanvas (Debian bug#522231) echo "deb-src http://debian.lcs.mit.edu/debian squeeze main" >> /etc/apt/sources.list # echo "deb-src http://localhost:9999/debian squeeze main" >> /etc/apt/sources.list apt-get update apt-get install apt-src devscripts apt-src install python-hippocanvas cd *hippo* DEB_BUILD_OPTIONS=nostrip debuild -us -uc cd .. dpkg -i *hippo*.deb
User Accounts
For stupid reasons, it's necessary that Sugar run under a uid inside the chroot which exists as a real account outside the chroot. (Talk to the DBus people.)
Consequently, as root, run something like this both inside and outside the chroot:
groupadd -g 64002 sugar useradd -m -u 64002 -g sugar -s /bin/bash sugar
D-Bus
Sugar wants to be able to use global state stored in both HAL and NetworkManager, both of which live on the system bus. Consequently, outside the chroot, we need to
sudo mount --bind /var/run/dbus $CHROOT/var/run/dbus
before entering the chroot. (Mock uses unshare() to enter a new mount-point namespace since this makes garbage collection of mountpoints much easier.)
X11
We need to point Sugar at an X server. One easy (but insecure) way to do this is to make a nested X server like so, outside the chroot:
Xephyr -ac :1 -screen 800x600x24 # 1024x768x24
See the talk page for more secure alternatives.
Running Sugar
Then, inside the chroot, you can happily run sugar as user 'sugar' with something like
sudo chroot $CHROOT /bin/bash -l su sugar - cd ~ ulimit -c unlimited export DISPLAY=localhost:1 export DBUS_SESSION_BUS_ADDRESS=$(dbus-daemon --session --print-address --fork) sugar
Then pull up the frame, switch to the home view, and launch some activities!
Cleaning Up
To correctly delete a chroot that you no longer need, kill all processes running in the chroot, and
sudo killall -u sugar export CHROOT=/path/to/my/chroot # important! umount $CHROOT/var/run/dbus umount $CHROOT/proc umount $CHROOT/dev/pts umount $CHROOT/tmp rm -rf $CHROOT