I'm trying to setup a central logstash configuration. However I would like to be sending my logs through syslog-ng and not third party shippers. This means that my logstash server is accepting via syslog-ng all the logs from the agents. I then need to install a logstash process that will be reading from /var/log/syslog-clients/* and grabbing all the log files that are sent to the central log server. These logs will then be sent to redis on the same VM. In theory I need to also configure a second logstash process that will read from redis and start indexing the logs and send them to elasticsearch. My question: Do I have to use two different logstash processes (shipper & server) even if I am in the same box (I want one log server instance)? Is there any way to just have one logstash configuration and have the process read from syslog-ng --- write to redis and also read from redis --- output to elastic search ? Diagram of my setup: [client]-------syslog-ng--- [log server] ---syslog-ng <----logstash-shipper --- redis <----logstash-server ---- elastic-search <--- kibana