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Master versus slave servers
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===========================
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IVLE is normally deployed in a cluster of several machines, split into
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two different roles: master and slave.
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There must be exactly one master server per cluster. The master normally
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runs the PostgreSQL database server, the Subversion server, and the IVLE User
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Management Server (``ivle-usrmgt-server``). It might also export shared data
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directories to the slaves over NFS.
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There may be any number of slaves in a cluster. They run the IVLE web
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application, which also starts console host processes. Each slave makes use
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of the shared services on the master.
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For a small instance a slave may be run on the same machine as the master.
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This is the setup described on this page.
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Installing from a Debian package
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================================
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Installing from source
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======================
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When setting up a development IVLE environment on Ubuntu 9.04 or later,
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there are scripts to automate most of the process. First get and extract
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a release, or check out the latest code from the bzr branch: ::
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This will create a new directory, ``ivle``, containing a pristine
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source tree. The remaining steps assume that you are in this new
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The ``ivle-dev-setup`` script will configure PostgreSQL, Apache, IVLE
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and the filesystem to cooperate, getting you most of the way to a
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working system in just one step: ::
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This reconfigures parts of your system, and has the potential to
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break other applications using Apache or PostgreSQL. It may also
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fail to execute if you have existing incompatible configurations
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This may take a few minutes, and will ask you to confirm installation
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of the dependency packages.
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Upon completion, you must build a self-contained jail in which to run
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untrusted user code. ``ivle-dev-setup`` will have configured most of
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the necessary settings, but you may wish to use a local Ubuntu mirror
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to improve speed or minimise download costs. If you don't wish to use
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a special mirror, you may omit the first step. ::
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sudo ivle-config --jail/mirror http://url.to.mirror/ubuntu
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sudo ivle-buildjail -r
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``ivle-buildjail`` will download a large volume of package data --
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potentially some hundreds of megabytes.
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``ivle-buildjail`` will download, unpack and install a minimal Ubuntu
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system and configure it for IVLE usage. This could take a while.
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Once the jail has been successfully built, IVLE is up and running,
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but with no user accounts or other data in place. For development
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or demonstration purposes, sample data (including fictitious users,
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subjects, and projects) can be loaded.
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For other environments, it may be more appropriate to start with an
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empty database and just create users as required.
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To load the sample data: ::
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sudo ivle-loadsampledata examples/db/sample.sql
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If you answer 'yes' to the ``ivle-loadsampledata`` prompt, any
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existing data in your IVLE database will be **permanently
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... or to add a new admin user: ::
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sudo ivle-adduser --admin -p password username 'Full Name'
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You should then be able to browse to http://ivle.localhost/, and
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log in with username ``admin`` and password ``password``, or the
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username and password that you gave to ``ivle-adduser``.
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If the automatic installation scripts do not work, or if you want more
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control over the whole process, these manual steps are probably for
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you. But you need not read this section at all if you were able to log
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in after following the steps above.
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.. If this list changes, you also need to change the list above, and
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the command in bin/ivle-dev-setup.
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.. If this list changes, you also need to change the list above.
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If you want to grab all of the required packages in one command, use::
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sudo apt-get install apache2 libapache2-mod-python libapache2-svn \
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python2.6 python-cjson python-configobj python-docutils python-epydoc \
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python-formencode python-genshi python-psycopg2 python-svn python-storm \
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libjs-jquery postgresql subversion debootstrap rsync build-essential
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python-formencode python-genshi python-psycopg2 python-svn python-routes \
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python-storm libjs-jquery postgresql subversion debootstrap rsync \
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While installing from a distribution package is often a better idea for
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users, developers will need to install from a plain source tree.
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doc/man/install.rst
