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# OSM PLA

The PLA module provides computation of optimal placement of xNFs over VIMs by matching NS specific requirements to infrastructure availability and run-time metrics, while considering cost of compute/network.

## Getting Started

Please refer to the [PLA User's Guide](docs/pla_users_guide.md) for a description on how to enable and configure the placement functionality.


## Running the tests

The preferred method to run the PLA unit test is to use tox.

`$ tox`

Please note that some of the unit test modules have dependencies to Minizinc, e.g. test_mznmodels.py and test_mznPlacementConductor.py.
If these tests are to be performed outside a PLA container context, like .e.g. from CLI or from within an IDE, setup the environment as follows (linux example):

```
$ sudo snap install minizinc --classic
$ sudo mkdir -p /minizinc/bin
$ sudo ln -s /snap/bin/minizinc /minizinc/bin/minizinc 
```

## Deployment

PLA is an optional module in OSM. It is installed together with OSM by adding ``--pla`` to the install script.

`$ ./install_osm.sh --pla`

## Built With

* [Python](www.python.org/) - the primary programming language for OSM
* [Minizinc](www.minizinc.org) - a free and open source constraint modelling language

## Contributing

Please read [CONTRIBUTING.md](CONTRIBUTING.md) for details on our code of conduct, and the process for submitting pull requests to us.

## Versioning

We use [SemVer](http://semver.org/) for versioning. For the versions available, see the [tags on this repository](https://osm.etsi.org/gitweb/?p=osm/PLA.git;a=tags).

## License

This project is licensed under the Apache2 License - see the [LICENSE.md](LICENSE) file for details

## Acknowledgments

* **Paolo Dragone** - *PyMzn, a python library that wraps and enhance Minizinc* - [pymzn](https://github.com/paolodragone/pymzn)
* **Billie Thompson** - *Initial work on README.md* - [PurpleBooth](https://github.com/PurpleBooth)