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.. image:: https://travis-ci.org/logilab/saemref-formula.svg?branch=master
    :target: https://travis-ci.org/logilab/saemref-formula

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===============
saemref-formula
===============

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A saltstack formula handling installation of `saem_ref`_.

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The formula will run two web application server, one dedicated to OAIPMH
request to serve ``/oai`` on port 8081 and one for other requests on port 8080.

To use them in a single port you may configure a reverse proxy, such as apache2
or nginx, on front of the instances.

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Available states
================

.. contents::
    :local:

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``saemref``
-----------

Equivalent to ``saemref.install`` and ``saemref.config``.

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``saemref.install``
-------------------

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Installs the saemref package from logilab repositories and create an instance
for user ``saemref``.

Cubicweb config files are located in ``~saemref/etc/cubicweb.d/saemref`` and
``cubicweb-ctl`` can be invoked as user ``saemref`` with environment variable
``CW_MODE=user``.

The state require the installation of `epel-formula`_ and `postgres-formula`_
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with version 9.4 (see ``pillar.example``).
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``saemref.config``
------------------

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Only manage instance configuration files.

``saemref.db-create``
---------------------

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Create instance database with ``cubicweb-ctl db-create`` (call implicitly ``db-init``).

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WARNING: this will destroy existing database if exists.

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``saemref.db-init``
---------------------

Initialize instance database schema with ``cubicweb-ctl db-init``.
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``saemref.supervisor``
----------------------

Install and manage `supervisor`_ configuration for the saemref installation.
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Here is some useful commands:

- restart instance: ``supervisorctl restart saemref``
- restart supervisor: ``systemctl restart supervisord``
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Requirements
============

If using postgres as database driver, ensure the `postgres contrib`_ package is
installed on server side.
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Recomended usage
================

Given target minion_id is 'srv'.

/srv/salt/top.sls::

    base:
        'srv':
            - saemref
            - saemref.supervisor


/srv/pillar/top.sls::

    base:
        'srv':
            - saemref


/srv/pillar/saemref.sls: see `pillar.example <test/pillar/example.sls>`_


Example of reverse proxy configuration for nginx::

    server {
        listen 80;
        server_name saemref.example.com;
        location / {
            proxy_pass http://srv:8080;
        }
        location /oai {
            proxy_pass http://srv:8081;
        }
    }


For the first installation run ``salt srv state.sls db-create`` to create
the database (WARNING: this will destroy existing database if exists).

Then run: ``salt srv state.highstate`` to finish the installation.
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Testing
=======

The script `run-test.py` can help to develop and test the formula using
`docker`_ and `testinfra`_.

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The command ``./run-test.py dev centos7`` will build image from
``test/centos7.Dockerfile`` and span a shell in a new container with mounted
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volumes from the host (so you can develop formula on the host and test it in
the container with ``salt-call``).

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The command ``./run-test.py dev centos7 --salt`` is the same as above but will
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provision the container (eg. calling ``salt-call state.highstate``)

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The command ``./run-test.py test centos7`` built a provisioned image
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(highstate) and run testinfra tests on it.

Note that you can add any parameters that testinfra (pytest) accept, for
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instance ``./run-test.py test centos7 -- -k idempotence --pdb``.
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Testing migration
=================

Add dumps generated by ``cubicweb-ctl db-dump`` in the ``test/dumps`` directory, then::

    # To test upgrade against latest public changeset of http://hg.logilab.org/master/cubes/saem_ref
    ./run-tests.py test centos7 -- test/test_migration.py --upgrade-revision master

    # To test against any revision from http://hg.logilab.org/review/cubes/saem_ref
    ./run-tests.py test centos7 -- test/test_migration.py --upgrade-revision REV


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.. _saem_ref: https://www.cubicweb.org/project/cubicweb-saem_ref
.. _supervisor: http://supervisord.org
.. _docker: https://www.docker.com/
.. _testinfra: https://testinfra.readthedocs.org/
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.. _epel-formula: https://github.com/saltstack-formulas/epel-formula
.. _postgres-formula: https://github.com/saltstack-formulas/postgres-formula
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.. _postgres contrib: https://www.postgresql.org/docs/current/static/contrib.html