This chapter was incorporated into this book in order to provide you with all the probing and prescribing details on seamlessly orchestrating multiple containers. We extensively discussed the need for container orchestration and the enabling tools to simplify and streamline the increasingly complicated process of container orchestration. In order to substantiate how orchestration is handy and helpful in crafting enterprise-class containers and to illustrate the orchestration process, we took the widely followed way of explaining the whole gamut through a simple example. We developed a web application and contained it within a standard container. Similarly, we took a database container, which is a backend for the frontend web application. The database gets executed inside another container. We saw how to make the web application container aware of the database, using different technologies through the container-linkage feature of the Docker Engine. We used an open-source tool (docker-compose) for this purpose.

In the next chapter, we will discuss how Docker facilitates software testing, especially integration testing with a few pragmatic examples.