Hands-On Microservices with Kubernetes

Managing configuration the old-fashioned way

When I say the old-fashioned way, I mean pre-Kubernetes static configuration. But as you'll see, the old-fashioned way is sometimes the best way, and is often well supported by Kubernetes too. Let's go over the various ways to configure a program, consider their pros and cons, and when they are appropriate. The configuration mechanisms we will cover here are as follows:

• No configuration (convention over configuration)
• Command-line arguments
• Environment variables
• Configuration files

While Delinkcious is implemented mostly in Go, we will use different programming languages to demonstrate the configuration options just for fun and variety.