Installation
============
For proper installation you need to clone project from git.

Surroundings
------------

The service can be installed on Windows 10 and CentOS 8 (not tested on other system versions).

Required predefined dependencies:

* Developer package postgresql (for psycopg2 installation, if you use postgresql as database), in CentOS 7 you can
  execute following command:

.. code-block:: bash

    yum install postgresql-server gcc python34-devel file postgresql postgresql-devel

- Python 3.10 is required.
- It is strongly recommended to create virtual surroundings for python dependencies installation.
- Python setuptools module can be installed via pip (pip install setuptools).


Dependencies installation
-------------------------

After surroundings installation launch *setup.py* with *install* parameter.

.. code-block:: bash

    python setup.py install

If surrounding is installed correctly, this script will install all dependencies and carry out versioning automatically.

If all dependencies are already installed and only versioning is required,
launch *versioneer.py* script with *version* parameter from root folder.
Please note that for versioning *git* files are required.

If you need to install dependencies without versioning, you should use dependencies file placed in *luna_streams.egg-info*

.. code-block:: bash

    pip install -r requires.txt

Configuration
-------------
After dependencies installation configuration file should be set. File is placed in *"./luna_streams/configs/config.conf"*.

Database creation
-----------------
All databases for service must be created in accordance with *"./luna_streams/configs/config.conf"*.

- Postgresql (require version 9.6 or higher)
- Oracle (require version Oracle Database Express Edition 11g or higher)

Create all required schemes in *postgresql*.
If database or user is not created yet, one should execute the following commands with "user name" and "database" from the config file
(for example, *config.conf* with "luna" and "luna_streams"):

.. code-block:: bash

    psql -U postgres;

.. code-block:: sql

    create role luna;
    ALTER USER luna WITH PASSWORD 'luna';
    CREATE DATABASE luna_streams;
    GRANT ALL PRIVILEGES ON DATABASE luna_streams TO luna;
    ALTER ROLE luna WITH LOGIN;

Activate PostGIS:

.. code-block:: bash

    runuser -u postgres -- psql -d luna_streams -c "CREATE EXTENSION postgis;";

Then launch *db_create.py* script for tables and primal data creation:

.. code-block:: bash

    python ./base_scripts/db_create.py

If script was executed without errors, all schemes were created successfully.
db_create also creates scripts for further database migration (db_repository folder), without these db migration execution is impossible.

First launch and testing
------------------------
If all previous actions are executed successfully, server is ready to work. To start server please launch *run.py* script.
While start you can add arguments: server message port, path to config, suffix for log files (for different workers).
By default 5160 port is used. Also it possible to run service with config from luna-configurator
(see `configurator <configurator.html>`_).

Example:

.. code-block:: bash

    ./run.py --port 5160 --config ./configs/myconfig.conf --log_suffix 1

After server is started, testing is recommended. To perform testing execute command

.. code-block:: bash

    python -m unittest tests.unittests_main

All tests should perform successfully.
