Ubuntu without templates

From OpenVZ Linux Containers Wiki

This tutorial will teach how to install the newest Ubuntu versions through chroot (no templates required).

Contents 1 Initial steps 2 Fixing bugs 2.1 udev 2.2 klogd 2.3 network 2.4 getty 2.5 Other init stuff 3 Finish

[edit] Initial steps

• Choose a number for your machine (example: 101)
• Choose an ubuntu version (this howto was tested with hardy, intrepid and jaunty)
• Go to the directory where the images will be placed:

cd /vz/private/

• Create a directory for the new machine:

mkdir 101

• Run debootstrap:

debootstrap --arch=i386 jaunty 101/ http://br.archive.ubuntu.com/ubuntu

(you can change the mirror if you want)

• Edit the machine configuration in /etc/vz/conf/101.conf. Configure its name, IP, memory and everything else
• Start the machine

vzctl start 101

[edit] Fixing bugs

[edit] udev

If you try to enter the machine you'll see an error:

eva:/vz/private# vzctl enter 101
enter into VE 101 failed
Unable to open pty: No such file or directory

To solve this, you'll have to remove udev from the boot:

eva:/vz/private# vzctl exec 101 'update-rc.d -f udev remove'
Removing any system startup links for /etc/init.d/udev ...
/etc/rcS.d/S10udev

Then you'll be able to enter the machine after restarting it:

vzctl restart 101
vzctl enter 101

Note: when you update the udev package you'll probably have to run the "update-rc.d -f udev remove" command again.

[edit] klogd

Type this command:

ps aux

You'll see that "init" didn't finish because the "klogd" process is still being run. You'll have to fix this:

update-rc.d -f klogd remove

Restart the machine and see the results:

exit
vzctl restart 101
vzctl enter 101
ps aux

[edit] network

For newer ubuntu versions, you'll notice that the network is not working. To fix this problem, you'll have to edit the /etc/init.d/networking script. You'll have to make it create the "/var/run/network" directory just after its "start":

 case "$1" in
   start)
     mkdir -p /var/run/network # -> this is the new line
     process_options

Then, start the networking:

 /etc/init.d/networking start

(important: use start, not restart)

[edit] getty

If you look at the running processes, you'll see that there are a lot of "/sbin/getty" processes. You can also remove these.

[edit] Other init stuff

Feel free to use 'update-rc.d' to remove any other unneded stuff =)

[edit] Finish

Now you're free to use your machine =)

You'll still probably want to add the "security" and "updates" repositories, install openssh-server, change the root password, update the system, change locales and other stuff. Enjoy =)