This is Graylog2 - Please see http://www.graylog2.org/ for more information and documentation. Thank you.
pthairu/graylog2-server
Graylog2 is an open source syslog implementation that stores your logs in ElasticSearch. It consists of a server written in Java that accepts your syslog messages via TCP or UDP and stores it in the database. The second part is a Ruby on Rails web interface that allows you to view the log messages.
JavaGPL-3.0