:title: Requirements and Installation on Ubuntu Linux :description: Please note this project is currently under heavy development. It should not be used in production. :keywords: Docker, Docker documentation, requirements, virtualbox, vagrant, git, ssh, putty, cygwin, linux .. _ubuntu_linux: Ubuntu ====== .. warning:: These instructions have changed for 0.6. If you are upgrading from an earlier version, you will need to follow them again. .. include:: install_header.inc Docker is supported on the following versions of Ubuntu: - :ref:`ubuntu_precise` - :ref:`ubuntu_raring_saucy` Please read :ref:`ufw`, if you plan to use `UFW (Uncomplicated Firewall) `_ .. _ubuntu_precise: Ubuntu Precise 12.04 (LTS) (64-bit) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This installation path should work at all times. Dependencies ------------ **Linux kernel 3.8** Due to a bug in LXC, docker works best on the 3.8 kernel. Precise comes with a 3.2 kernel, so we need to upgrade it. The kernel you'll install when following these steps comes with AUFS built in. We also include the generic headers to enable packages that depend on them, like ZFS and the VirtualBox guest additions. If you didn't install the headers for your "precise" kernel, then you can skip these headers for the "raring" kernel. But it is safer to include them if you're not sure. .. code-block:: bash # install the backported kernel sudo apt-get update sudo apt-get install linux-image-generic-lts-raring linux-headers-generic-lts-raring # reboot sudo reboot Installation ------------ .. warning:: These instructions have changed for 0.6. If you are upgrading from an earlier version, you will need to follow them again. Docker is available as a Debian package, which makes installation easy. **See the :ref:`installmirrors` section below if you are not in the United States.** Other sources of the Debian packages may be faster for you to install. First add the Docker repository key to your local keychain. You can use the ``apt-key`` command to check the fingerprint matches: ``36A1 D786 9245 C895 0F96 6E92 D857 6A8B A88D 21E9`` .. code-block:: bash sudo sh -c "wget -qO- https://get.docker.io/gpg | apt-key add -" Add the Docker repository to your apt sources list, update and install the ``lxc-docker`` package. *You may receive a warning that the package isn't trusted. Answer yes to continue installation.* .. code-block:: bash sudo sh -c "echo deb http://get.docker.io/ubuntu docker main\ > /etc/apt/sources.list.d/docker.list" sudo apt-get update sudo apt-get install lxc-docker .. note:: There is also a simple ``curl`` script available to help with this process. .. code-block:: bash curl -s https://get.docker.io/ubuntu/ | sudo sh Now verify that the installation has worked by downloading the ``ubuntu`` image and launching a container. .. code-block:: bash sudo docker run -i -t ubuntu /bin/bash Type ``exit`` to exit **Done!**, now continue with the :ref:`hello_world` example. .. _ubuntu_raring_saucy: Ubuntu Raring 13.04 and Saucy 13.10 (64 bit) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ These instructions cover both Ubuntu Raring 13.04 and Saucy 13.10. Dependencies ------------ **Optional AUFS filesystem support** Ubuntu Raring already comes with the 3.8 kernel, so we don't need to install it. However, not all systems have AUFS filesystem support enabled. AUFS support is optional as of version 0.7, but it's still available as a driver and we recommend using it if you can. To make sure AUFS is installed, run the following commands: .. code-block:: bash sudo apt-get update sudo apt-get install linux-image-extra-`uname -r` Installation ------------ Docker is available as a Debian package, which makes installation easy. .. warning:: Please note that these instructions have changed for 0.6. If you are upgrading from an earlier version, you will need to follow them again. First add the Docker repository key to your local keychain. You can use the ``apt-key`` command to check the fingerprint matches: ``36A1 D786 9245 C895 0F96 6E92 D857 6A8B A88D 21E9`` .. code-block:: bash sudo sh -c "wget -qO- https://get.docker.io/gpg | apt-key add -" Add the Docker repository to your apt sources list, update and install the ``lxc-docker`` package. .. code-block:: bash sudo sh -c "echo deb http://get.docker.io/ubuntu docker main\ > /etc/apt/sources.list.d/docker.list" sudo apt-get update sudo apt-get install lxc-docker Now verify that the installation has worked by downloading the ``ubuntu`` image and launching a container. .. code-block:: bash sudo docker run -i -t ubuntu /bin/bash Type ``exit`` to exit **Done!**, now continue with the :ref:`hello_world` example. .. _ufw: Docker and UFW ^^^^^^^^^^^^^^ Docker uses a bridge to manage container networking. By default, UFW drops all `forwarding` traffic. As a result will you need to enable UFW forwarding: .. code-block:: bash sudo nano /etc/default/ufw ---- # Change: # DEFAULT_FORWARD_POLICY="DROP" # to DEFAULT_FORWARD_POLICY="ACCEPT" Then reload UFW: .. code-block:: bash sudo ufw reload UFW's default set of rules denies all `incoming` traffic. If you want to be able to reach your containers from another host then you should allow incoming connections on the Docker port (default 4243): .. code-block:: bash sudo ufw allow 4243/tcp .. _installmirrors: Mirrors ^^^^^^^ You should ``ping get.docker.io`` and compare the latency to the following mirrors, and pick whichever one is best for you. Yandex ------ `Yandex `_ in Russia is mirroring the Docker Debian packages, updating every 6 hours. Substitute ``http://mirror.yandex.ru/mirrors/docker/`` for ``http://get.docker.io/ubuntu`` in the instructions above. For example: .. code-block:: bash sudo sh -c "echo deb http://mirror.yandex.ru/mirrors/docker/ docker main\ > /etc/apt/sources.list.d/docker.list" sudo apt-get update sudo apt-get install lxc-docker