In this chapter, we are going to start playing with the really cool stuff. We are going to use all the skills we have learned in the book so far. We are really going to step it up by a notch. In this chapter, we are going to deploy four servers. We will look at how to cluster Consul, which will give us a perfect opportunity to further our modules' functionality. In this chapter, we are going to look at two ways to network our containers. First, by using the standard host IP network, that our Consul cluster will communicate on. We will also install the ELK (Elasticsearch, Logstash, and Kibana) stack (https://www.elastic.co/). To do this, we will be writing a module for each of the products. Because Elasticsearch is our data store in this solution, we want to hide it so that only Logstash and Kibana can access the application. We will accomplish this using the native Docker networking stack and isolate Elasticsearch using VXLAN. As you can see, we are going...