~azzar1/unity/add-show-desktop-key

.. IVLE - Informatics Virtual Learning Environment

   Copyright (C) 2007-2009 The University of Melbourne

.. This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

.. This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

.. You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

.. _ref-install:

************

Installation

************

System requirements

===================

Given versions are those on which IVLE is known to work; earlier versions

might work too. Debian/Ubuntu package names are given after the name of the

software.

.. If this list changes, you also need to change the list below.

* Ubuntu 8.04 or later (other distros should work with some tweaking, but are untested)

* Apache 2.x (``apache2``) with modules:

   + mod_python (``libapache2-mod-python``)

   + mod_dav_svn and mod_authz_svn (``libapache2-svn``)

* Python 2.5 (``python2.5``) or 2.6 (``python2.6``) with modules:

   + cjson (``python-cjson``)

   + ConfigObj (``python-configobj``)

   + docutils (``python-docutils``)

   + epydoc (``python-epydoc``)

   + FormEncode (``python-formencode``)

   + Genshi (``python-genshi``)

   + psycopg2 (``python-psycopg2``)

   + pysvn (``python-svn``)

   + Routes (``python-routes``)

   + Storm (``python-storm``)

* jQuery (``libjs-jquery``)

* PostgreSQL 8.3 or later (``postgresql``)

* Subversion (``subversion``)

* debootstrap (``debootstrap``)

* rsync (``rsync``)

* GCC and related build machinery (``build-essential``)

Master versus slave servers

===========================

Installing from a Debian package

================================

Installing from source

======================

.. If this list changes, you also need to change the list above.

If you want to grab all of the required packages in one command, use::

    sudo apt-get install apache2 libapache2-mod-python libapache2-svn \

    python2.6 python-cjson python-configobj python-docutils python-epydoc \

    python-formencode python-genshi python-psycopg2 python-svn python-routes \

    python-storm libjs-jquery postgresql subversion debootstrap rsync \

    build-essential

While installing from a distribution package is often a better idea for

users, developers will need to install from a plain source tree.

To get the tree, either grab and extract a release tarball, or get the

very latest code using bzr: ::

   bzr get lp:ivle

You should then change into the new source directory.

As IVLE needs to compile some binaries, you must first build, then

install it: ::

   ./setup.py build

   sudo ./setup.py install

Unlike the package, you will have to manually set up the database and

configuration.

First, it is recommended that you create a separate database user for IVLE.

You may use any name for the user. ::

   sudo -u postgres createuser ivleuser     # Answer 'n' to all questions

   sudo -u postgres psql -c "ALTER USER ivleuser WITH ENCRYPTED PASSWORD 'ivle-password';"

Now, you must create a PostgreSQL database, and populate it with the

IVLE schema. You may use any name for the database (here we use ``ivle``). ::

   sudo -u postgres createdb -O ivleuser ivle

   sudo -u postgres createlang plpgsql ivle

   psql -h localhost -W ivle ivleuser < userdb/users.sql

The configuration wizard - ``ivle-config`` - will ask you a series of

questions. You should give the database username and password as configured

above. Apart from database settings, the defaults should be correct

for a development system. If deploying IVLE properly - particularly on

multiple nodes - several options will need to be changed. Watching

carefully, run: ::

   sudo ivle-config

Basic configuration

===================

.. Note: Place here only the configuration required to get the system

   installed and running. Any further configuration should go in config.rst.

IVLE needs a directory hierarchy in which to store filesystem data, which

by default lives in ``/var/lib/ivle``. Create it now. ::

   sudo ivle-createdatadirs

Configuring the jail environment

--------------------------------

You will require a self-contained jail environment in which to safely

execute student code. 

Before you can actually build the jail, a few configuration options are

needed. Open up ``/etc/ivle/ivle.conf``, and find the ``[jail]`` section

(**not** the ``[[jails]]`` section).

Add to it: ::

   devmode = True

   suite = jaunty # Replace this with the codename of your Ubuntu release.

   mirror = http://url.to.archive/mirror # Replace with a fast Ubuntu mirror.

   extra_packages = python-configobj, python-svn, python-cjson

.. TODO: Move this around a bit, as the config options required differ for

   the packaged version.

Now we can actually build the jail. The creation process basically downloads

a minimal Ubuntu system and installs it in ``/var/lib/ivle/jails/__base__``.

Note that this could download a couple of hundred megabytes. ::

   sudo ivle-buildjail -r

Configuring Apache

------------------

IVLE makes use of two Apache virtual hosts: one for the application itself,

and one for the Subversion services. There are example configuration files

in ``examples/config/apache.conf`` and ``examples/config/apache-svn.conf``,

which will run IVLE at ``http://ivle.localhost/``.

On a Debian or Ubuntu system, just copy those two files into

``/etc/apache2/sites-available`` under appropriate names (eg. ``ivle`` and

``ivle-svn``). Then you need to activate them: ::

   sudo a2ensite ivle

   sudo a2ensite ivle-svn

   sudo /etc/init.d/apache2 reload

Configuring hostname resolution

--------------------------------

All of IVLE's hostnames need to be resolvable from the local system. For a

production environment, this would be done in DNS. For a development system,

this is usually done in ``/etc/hosts``. Add this line to that file: ::

   127.0.1.1 ivle.localhost public.ivle.localhost svn.ivle.localhost

Code running inside the jail environment also needs to be able to resolve

those names. Add, to ``/var/lib/ivle/jails/__base_build__/etc/hosts``: ::

   127.0.1.1 svn.ivle.localhost

Then refresh the active copy of the jail: ::

   sudo ivle-buildjail

Configuring the user management server

--------------------------------------

You need to have the IVLE user management server (``usrmgt-server``) running

for many parts of IVLE to operate properly, so it should be configured to

start on boot. There is an example init script in

``examples/config/usrmgt-server.init``. For Debian or Ubuntu, copy it to

``/etc/init.d/ivle-usrmgt-server``. Start it now, and set it to start

automatically: ::

   sudo /etc/init.d/ivle-usrmgt-server start

   sudo update-rc.d ivle-usrmgt-server defaults 99

Creating the initial user

-------------------------

The final step in getting a usable IVLE set up is creating a user. You'll

probably want admin privileges - if not, drop the ``--admin``. ::

   sudo ivle-adduser --admin -p password username 'Full Name'

You should then be able to browse to ``http://ivle.localhost/``, and

log in with that username and password.

.. note::

   For more advanced configuration, see :ref:`Configuring IVLE

   <ref-configuring-ivle>`.