log4j2-demo-app
Demo app for showing Log4J 2 features including the logstash GELF appender.
Note: To receive log messages in Graylog2 you have to add an input (System -> Inputs), Settings: GELF UDP, port: 12201, bind address: 0.0.0.0
Change Graylog server settings in log4j2.xml.
<GELF name="gelfAppender" server="192.168.56.101" port="12201" hostName="myhost" protocol="UDP" additionalFields="{'environment': 'DEV', 'application': 'MyAPP'}" />
Change server and port to your needs. The hostname is the source in Graylog2.
To get a quick setup on using Graylog2 you can use the vagrant box https://github.com/fred4jupiter/graylog2-in-a-box