Sahara Installation Guide
=========================

We recommend installing sahara in a way that will keep your system in a
consistent state. We suggest the following options:

* Install via `Fuel <http://fuel.mirantis.com/>`_

* Install via `RDO <http://openstack.redhat.com/>`_

* Install into a virtual environment



To install with Fuel
--------------------

1. Start by following the `MOS Quickstart
   <http://software.mirantis.com/quick-start/>`_ to install and setup
   OpenStack.

2. Enable the sahara service during installation.



To install with RDO
-------------------

1. Start by following the `RDO Quickstart
   <http://openstack.redhat.com/Quickstart>`_ to install and setup
   OpenStack.

2. Install sahara:

.. sourcecode:: console

    # yum install openstack-sahara
..

3. Configure sahara as needed. The configuration file is located in
   ``/etc/sahara/sahara.conf``. For details see
   :doc:`Sahara Configuration Guide <configuration.guide>`

4. Create the database schema:

.. sourcecode:: console

    # sahara-db-manage --config-file /etc/sahara/sahara.conf upgrade head
..

5. Go through :ref:`common_installation_steps` and make any
   necessary changes.

6. Start the sahara-all service:

.. sourcecode:: console

    # systemctl start openstack-sahara-all
..

7. *(Optional)* Enable sahara to start on boot

.. sourcecode:: console

    # systemctl enable openstack-sahara-all
..


To install into a virtual environment
-------------------------------------

1. First you need to install a number of packages with your
   OS package manager. The list of packages depends on the OS you use.
   For Ubuntu run:

.. sourcecode:: console

    $ sudo apt-get install python-setuptools python-virtualenv python-dev
..

   For Fedora:

.. sourcecode:: console

    $ sudo yum install gcc python-setuptools python-virtualenv python-devel
..

   For CentOS:

.. sourcecode:: console

    $ sudo yum install gcc python-setuptools python-devel
    $ sudo easy_install pip
    $ sudo pip install virtualenv

2. Setup a virtual environment for sahara:

.. sourcecode:: console

    $ virtualenv sahara-venv
..

   This will install a python virtual environment into ``sahara-venv``
   directory in your current working directory. This command does not
   require super user privileges and can be executed in any directory where
   the current user has write permissions.

3. You can install the latest sahara release from pypi:

.. sourcecode:: console

    $ sahara-venv/bin/pip install sahara
..

   Or you can get a sahara archive from
   `<http://tarballs.openstack.org/sahara/>`_ and install it using pip:

.. sourcecode:: console

    $ sahara-venv/bin/pip install 'http://tarballs.openstack.org/sahara/sahara-master.tar.gz'
..

   Note that ``sahara-master.tar.gz`` contains the latest changes and
   might not be stable at the moment. We recommend browsing
   `<http://tarballs.openstack.org/sahara/>`_ and selecting the latest
   stable release.

4. After installation you should create a configuration file from the sample
   file located in ``sahara-venv/share/sahara/sahara.conf.sample-basic``:

.. sourcecode:: console

    $ mkdir sahara-venv/etc
    $ cp sahara-venv/share/sahara/sahara.conf.sample-basic sahara-venv/etc/sahara.conf
..

    Make any necessary changes to ``sahara-venv/etc/sahara.conf``.
    For details see :doc:`Sahara Configuration Guide <configuration.guide>`

.. _common_installation_steps:

Common installation steps
-------------------------

The steps below are common to both the RDO and virtual environment
installations of sahara.

1. If you use sahara with a MySQL database, then for storing big job binaries
   in the sahara internal database you must configure the size of the maximum
   allowed packet. Edit the ``my.cnf`` file and change the
   ``max_allowed_packet`` parameter as follows:

.. sourcecode:: ini

   ...
   [mysqld]
   ...
   max_allowed_packet          = 256M
..

    Then restart the mysql server to ensure these changes are active.

2. Create the database schema:

.. sourcecode:: console

    $ sahara-venv/bin/sahara-db-manage --config-file sahara-venv/etc/sahara.conf upgrade head
..

3. To start sahara call:

.. sourcecode:: console

    $ sahara-venv/bin/sahara-all --config-file sahara-venv/etc/sahara.conf
..

.. _register-sahara-label:

4. For sahara to be accessible in the OpenStack Dashboard and for
   python-saharaclient to work properly you must register sahara in
   the Identity service catalog. For example:

.. sourcecode:: console

    keystone service-create --name sahara --type data-processing \
        --description "Sahara Data Processing"

    keystone endpoint-create --service sahara --region RegionOne \
        --publicurl "http://10.0.0.2:8386/v1.1/%(tenant_id)s" \
        --adminurl "http://10.0.0.2:8386/v1.1/%(tenant_id)s" \
        --internalurl "http://10.0.0.2:8386/v1.1/%(tenant_id)s"
..

5. For more information on configuring sahara with the OpenStack Dashboard
   please see :doc:`dashboard.guide`.

Notes:
------

Ensure that your operating system is not blocking the sahara port
(default: 8386). You may need to configure iptables in CentOS and
other Linux distributions to allow this access.


To get the list of all possible options run:

.. sourcecode:: console

    $ sahara-venv/bin/python sahara-venv/bin/sahara-all --help
..


Further, consider reading :doc:`overview` for general sahara concepts and
:doc:`plugins` for specific plugin features/requirements.