Hands-On Microservices with Kubernetes

Dockerizing a Go service with a multi-stage Dockerfile

The Docker images you build in a microservice system are very important. You will build many of them, and each one many, many times. These images will also be shipped back and forth over the wire, and they present a target for attackers. With this in mind, it makes sense to build images that have the following properties:

• Lightweight
• Present minimal attack surface

This can be done by using a proper base image. For example, Alpine is very popular due to its small footprint. However, nothing beats the scratch base image. With Go-based microservices, you can literally create an image that just contains your service binary. Let's continue peeling the onion and look into the Dockerfile of ...