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moby--moby/docs/sources/installation/rackspace.rst

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:title: Rackspace Cloud Installation
:description: Installing Docker on Ubuntu proviced by Rackspace
:keywords: Rackspace Cloud, installation, docker, linux, ubuntu
===============
Rackspace Cloud
===============
.. include:: install_unofficial.inc
Installing Docker on Ubuntu provided by Rackspace is pretty
straightforward, and you should mostly be able to follow the
:ref:`ubuntu_linux` installation guide.
**However, there is one caveat:**
If you are using any linux not already shipping with the 3.8 kernel
you will need to install it. And this is a little more difficult on
Rackspace.
Rackspace boots their servers using grub's ``menu.lst`` and does not
like non 'virtual' packages (e.g. xen compatible) kernels there,
although they do work. This makes ``update-grub`` to not have the
expected result, and you need to set the kernel manually.
**Do not attempt this on a production machine!**
.. code-block:: bash
# update apt
apt-get update
# install the new kernel
apt-get install linux-generic-lts-raring
Great, now you have kernel installed in ``/boot/``, next is to make it
boot next time.
.. code-block:: bash
# find the exact names
find /boot/ -name '*3.8*'
# this should return some results
Now you need to manually edit ``/boot/grub/menu.lst``, you will find a
section at the bottom with the existing options. Copy the top one and
substitute the new kernel into that. Make sure the new kernel is on
top, and double check kernel and initrd point to the right files.
Make special care to double check the kernel and initrd entries.
.. code-block:: bash
# now edit /boot/grub/menu.lst
vi /boot/grub/menu.lst
It will probably look something like this:
::
## ## End Default Options ##
title Ubuntu 12.04.2 LTS, kernel 3.8.x generic
root (hd0)
kernel /boot/vmlinuz-3.8.0-19-generic root=/dev/xvda1 ro quiet splash console=hvc0
initrd /boot/initrd.img-3.8.0-19-generic
title Ubuntu 12.04.2 LTS, kernel 3.2.0-38-virtual
root (hd0)
kernel /boot/vmlinuz-3.2.0-38-virtual root=/dev/xvda1 ro quiet splash console=hvc0
initrd /boot/initrd.img-3.2.0-38-virtual
title Ubuntu 12.04.2 LTS, kernel 3.2.0-38-virtual (recovery mode)
root (hd0)
kernel /boot/vmlinuz-3.2.0-38-virtual root=/dev/xvda1 ro quiet splash single
initrd /boot/initrd.img-3.2.0-38-virtual
Reboot server (either via command line or console)
.. code-block:: bash
# reboot
Verify the kernel was updated
.. code-block:: bash
uname -a
# Linux docker-12-04 3.8.0-19-generic #30~precise1-Ubuntu SMP Wed May 1 22:26:36 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
# nice! 3.8.
Now you can finish with the :ref:`ubuntu_linux` instructions.