Before version 1.5, Logstash included all plugins in each release. This made it easy to make use of any plugin, but it complicated plugin development—a new release of Logstash became necessary if a plugin needed patching. Since version 1.5, all plugins are independent of the Logstash core. Now you can add your own input, codec, filter, or output plugins to Logstash much more easily!
Since plugins can now be developed and deployed independently of the Logstash core, there are documents which guide you through the process of coding and deploying your own plugins:
Plugin API Changes [2.0] Added in 2.0. edit
The 2.0 release of Logstash changes how input plugins shut down to increase shutdown reliability. There are three methods
for plugin shutdown:
stopmethod from outside the plugin thread. This method signals the plugin to stop.
stopmethod has already been called for that plugin.
closemethod performs final bookkeeping and cleanup after the plugin’s
runmethod and the plugin’s thread both exit. The
closemethod is a a new name for the method known as
teardownin previous versions of Logstash.
terminating? methods are redundant and no longer present in the
Plugin Base class.
Sample code for the new plugin shutdown APIs is available.
Extending Logstash coreedit
We also welcome contributions and bug fixes to the Logstash core feature set.