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+====== Setup a CentOS schroot on Debian ======
+Inspired by the setup of Debian chroot for sbuild:
+  * http://wiki.debian.org/sbuild?rev=19
+  * http://wiki.debian.org/mk-sbuild
+<code bash>
+$ apt-get install schroot sbuild btrfs-tools
+</code>
+We will use the btrfs flavor of schroot.
+Since btrfs is still experimental, I choose to create loopback device formated with btrfs and mounted as follows:
+<code bash>
+$ cat <EOF >> /etc/fstab
+/home/schroot-btrfs     /srv/chroot     btrfs   defaults        0       0
+EOF
+/home/schroot-btrfs is a 20G file (to created if, please help yourself)
+</code>
+Create the centos6 schroot configuration file:
+<code bash>
+$ cat < 'EOF' > /etc/schroot/chroot.d/centos6-amd64
+[centos6-amd64]
+type=btrfs-snapshot
+description=CentOS 6/amd64 autobuilder
+groups=root,sbuild
+root-groups=root,sbuild
+profile=sbuildrpm
+btrfs-source-subvolume=/srv/chroot/centos6-amd64
+btrfs-snapshot-directory=/srv/chroot/snapshots
+EOF
+</code>
+Setup the filesystem subvolume and snapshots
+<code bash>
+$ btrfs subvolume create /srv/chroot/centos6-amd64
+$ mkdir -p /srv/chroot/snapshots
+</code>
+Bootstrap the centos system:
+<code bash>
+$ cat EOF >> /etc/rinse/rinse.conf
+[centos-6]
+mirror       = http://ftp.ciril.fr/pub/linux/centos/6/os/i386/Packages/
+mirror.amd64 = http://ftp.ciril.fr/pub/linux/centos/6/os/x86_64/Packages/
+EOF
+$ rinse --distribution centos-6 --arch amd64 --directory /srv/chroot/centos6-amd64/
+</code>
+We copy the /dev from a Debian schroot (rinse's one one is buggy)
+<code bash>
+$ cp -a /srv/chroot/sid-amd64-sbuild/dev /srv/chroot/centos6-amd64/
+</code>
+Finally, we do some customizations to make the centos system schroot friendly
+<code bash>
+$ echo centos6-amd64 > /srv/chroot/centos6-amd64/etc/debian_chroot
+$ cat << 'EOF' > /srv/chroot/centos6-amd64/etc/profile.d/debian_chroot.sh
+# set variable identifying the chroot you work in (used in the prompt below)
+if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
+    debian_chroot=$(cat /etc/debian_chroot)
+fi
+# set a fancy prompt (non-color, overwrite the one in /etc/profile)
+PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
+EOF
+</code>
+Test
+<code bash>
+$ sudo adduser <user> sbuild
+</code>
+(logout and login again)
+Enter the snapshoted chroot:
+<code bash>
+$ schroot -c chroot:centos6-amd64 ...
+</code>
+Enter the source chroot (to upgrade the base system for instance)
+<code bash>
+$ sudo schroot -c source:centos6-amd64 ..
+</code>
+You can then use sbuildrpm or any other test in the CentOS schroot environement...