![]() Wait, wasn't lumberjack the original name of the logstash-forwarder? A quick read in the lumberjack output plugin documentation doesn't really show a use case for this output, but it's certainly worth a try. Going through the list of Logstash output plugins, one name catches the eye: lumberjack. Sure, there are the basic tcp and udp output plugins, which simply connect to a Logstash listener on the given port - but is that the right choice? The challenge now is to find the right Logstash output plugin. It would surely work, but do we really want to involve another daemon? Nope. Not only will you lose time by writing disks to log (by Logstash) and reading them again (by Filebeat), it also means to install a second daemon (Filebeat) which uses resources on that local Logstash server. ![]() These files are then picked up by Filebeat and sent to the central Logstash server. The idea behind using Filebeat as a forwarder to another Logstash server would be for the local Logstash to write local logs into files. So if Filebeat should be used instead, is there an actual logstash-output-filebeat plugin available? No, there isn't (as of this writing). We'll come back to the lumberjack name later again. The 'lumberjack' name now remains as the network protocol, and 'logstash-forwarder' is the name of the program. This project was recently renamed from 'lumberjack' to 'logstash-forwarder' to make its intended use clear. Interestingly this project was renamed from "lumberjack" to "logstash-forwarder" as can be read in the README: ![]() The filebeat project replaces logstash-forwarder. However logstash-forwarder was replaced by Filebeat: The question is: Which output plugin should be used to forward the logs? Once upon a time: logstash-forwarderĪ couple of years ago, the logstash-forwarder project was created to solve exactly this: Pick up logs and forward them to one or more Logstash servers "listening for our messages". For such a scenario a "local" Logstash server, which is used as a forwarder to the central Logstash server, can be used. A practical example: Your applications run on different premises or cloud providers but you still want to have all the logs in a central place. In a usual ELK setup, one would run application servers logging to a central Logstash server and this Logstash writes log events into an Elasticsearch index.īut sometimes it might be required to forward logs from a central Logstash to another Logstash server. Logstash to Logstash log forwarding using the Lumberjack output plugin
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