Apache Ambari is a tool for provisioning, managing, and monitoring Apache Hadoop clusters. Ambari consists of a set of RESTful APIs and a browser-based management interface.
https://cwiki.apache.org/confluence/display/AMBARI/Quick+Start+Guide
https://cwiki.apache.org/confluence/display/AMBARI/Technology+Stack
https://cwiki.apache.org/confluence/display/AMBARI/How+to+Contribute