Summary
In this chapter, we looked at how microservices can be containerized with containers, and how you can create a deployment entirely based on Docker images. Containers are a well-established technology that is widely used to run internet services. The most important thing to keep in mind is that a containerized application is ephemeral: it is designed to be destroyed and recreated on demand, and any data that is not externalized using a mount point is lost.
For provisioning and clustering your services, there is no generic solution, as the tools you use will depend on your needs. From a simple Docker Compose setup to a full Kubernetes cluster, each option provides different complexity and benefits. The best choice often depends on where you are to deploy your services, how your teams work, and how large your application needs to be in the present—there is no sense in planning for an unknowable future.
The best way to tackle this problem is to take baby...