Some Dockerfiles to build logstash plugin gems
logstash 1.5 requires plugins to be gems. This is good, but getting the environment right to build a gem was an effort for me, so now I'm using docker. It works for plugins that are well prepared, like translate or math. One word of warning: This rvm stuff takes long. And yes, I should build an image for the rvm environment, and then base the other two images on this.