10. Creating Software Install Modules

POWER-Up provides a simple framework for running user provided software install modules. Software install modules are Python modules which reside in the power-up/software directory. The module may be given any valid Python module name. A POWER-Up software install module can contain any user provided code, but it must implement a class named ‘software’ and the software class must implement the following methods;

• README
• prep
• init_client
• install
• status

The prep method is generally intended to provide setup of repositories and directories and installation and configuration of a web server. POWER-Up provides support for setting up an EPEL mirror and supports installation of the nginx web server.

In order to facilitate software installation to clusters without internet access, the prep method is intended to be able to run without requiring access to the cluster nodes. This allows preloading of required software onto a laptop or other node prior to being connected to the cluster.

The init_client method should provide for license accept activities and setting up client nodes to access the POWER-Up node for any implemented repositories.

The install method needs to implement the logic for installing the desired software packages and binaries on the cluster nodes. POWER-Up includes Ansible. The install method may make use of any Ansible modules or POWER-Up provided playbooks.