Overview

The core of the infrastructure is Jenkins, the open source automation server for continuous delivery. The continuous integration infrastructure consists of a cascade of 3 distinct layers and is a master-slave architecture: a public interaction layer (top), the Jenkins server layer, and the layer with 4 computing nodes behind a firewall, each running a different operating system. A change made in a public repository on GitHub (github.com) is seen by the Jenkins server (master), which in turn triggers multiple builds on the 4 computing nodes simultaneously (slaves).