You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
4.2 KiB
ReStructuredText
118 lines
4.2 KiB
ReStructuredText
Docker compose requirements
|
|
===========================
|
|
|
|
Hardware considerations
|
|
-----------------------
|
|
|
|
You should make sure that your hardware (virtual or physical) is compatible with
|
|
the latest Linux kernel. Also, you should have at least 3GB of total memory and
|
|
1GB of free memory/swap when running Mailu.
|
|
|
|
Pick a distribution
|
|
-------------------
|
|
|
|
The mail server runs as a set of Docker containers. It is thus almost agnostic
|
|
of the underlying operating system as long as a fairly recent Linux kernel is
|
|
running and the Docker API (>= 1.11) is available.
|
|
|
|
Because most of our tests run on Debian Jessie and Debian Stretch, we recommend
|
|
one of these for the base system. Mailu should however be able to run on
|
|
any of the `officially supported distributions`_.
|
|
|
|
For the purpose of this guide, all examples are based on Debian Stretch. The
|
|
differences with other system will hardly be noticeable however.
|
|
|
|
.. _`officially supported distributions`: https://docs.docker.com/engine/installation/
|
|
|
|
Install the distribution
|
|
------------------------
|
|
|
|
First, install Debian Stretch from the *netinstall* CD image. When installing,
|
|
make sure that you either:
|
|
|
|
- setup a root *ext4* partition,
|
|
- or setup a root *btrfs* partition,
|
|
- or leave enough unpartitionned space for a dedicated *ext4* or *btrfs*
|
|
partition.
|
|
|
|
If you chose to create a dedicated partition, simply mount it to
|
|
``/var/lib/docker``. You could also create a separate partition (*ext4* is a
|
|
sane default) and mount it to ``/mailu`` for storing e-mail data.
|
|
|
|
Docker supports *AUFS* over *ext4* and *btrfs* as stable storage drivers.
|
|
Other filesystems are supported such as *OverlayFS*. If you know what you are
|
|
doing, you should go for it.
|
|
|
|
Mailu uses Docker port forwarding from the host to make services
|
|
available to external users. First, your host should have a public IP address
|
|
configured (see ``/etc/network/interfaces``) or your router should
|
|
forward connections to its internal IP address. Due to spam problems and
|
|
reputation services, it
|
|
is highly recommended that you use a dedicated IP address for your mail server
|
|
and that you have a dedicated hostname with forward and reverse DNS entries
|
|
for this IP address.
|
|
|
|
Also, your host must not listen on ports ``25``, ``80``, ``110``, ``143``,
|
|
``443``, ``465``, ``587``, ``993`` or ``995`` as these are used by Mailu
|
|
services. Therefore, you should disable or uninstall any program that is
|
|
listening on these ports (or have them listen on a different port). For
|
|
instance, on a default Debian install:
|
|
|
|
.. code-block:: bash
|
|
|
|
apt-get autoremove --purge exim4 exim4-base
|
|
|
|
|
|
Finally, Docker relies heavily on ``iptables`` for port forwardings. You
|
|
should use ``iptables-persistent`` (or any equivalent tool on other
|
|
systems) for managing persistent rules. If you were brave enough to switch to
|
|
``nftables``, you will have to rollback until official support is released
|
|
by Docker or setup your own rulesets.
|
|
|
|
Install Docker
|
|
--------------
|
|
|
|
Mailu relies on some of the latest Docker features. Therefore, you should
|
|
install Docker from the official repositories instead of your distribution
|
|
ones.
|
|
|
|
The Docker website is full of `detailed instructions`_
|
|
about setting up a proper Docker install. Default configuration should be
|
|
suited for Mailu.
|
|
|
|
Additionally, you must install ``docker-compose`` by following the instructions
|
|
from the `Docker website`_ if you plan on using the CompComposesoe flavor. Compose is a
|
|
management tool for Docker, especially suited for multiple containers systems
|
|
like Mailu.
|
|
|
|
.. _`detailed instructions`: https://docs.docker.com/engine/installation/
|
|
.. _`Docker website`: https://docs.docker.com/compose/
|
|
|
|
Once everything is setup, you should be able to run the following commands
|
|
(exact version numbers do not matter):
|
|
|
|
.. code-block:: bash
|
|
|
|
$ docker version
|
|
Client:
|
|
Version: 1.11.2
|
|
API version: 1.23
|
|
Go version: go1.6.2
|
|
Git commit: b9f10c9
|
|
Built: Sun Jun 5 23:17:55 2016
|
|
OS/Arch: linux/amd64
|
|
|
|
Server:
|
|
Version: 1.11.1
|
|
API version: 1.23
|
|
Go version: go1.6.2
|
|
Git commit: 5604cbe
|
|
Built: Mon May 2 00:06:51 2016
|
|
OS/Arch: linux/amd64
|
|
|
|
$ docker-compose version
|
|
docker-compose version 1.7.1, build 6c29830
|
|
docker-py version: 1.8.1
|
|
CPython version: 3.5.1
|
|
OpenSSL version: OpenSSL 1.0.2h 3 May 2016
|