HA best practices

In order to build HA Kubernetes systems, it's important to note that availability is as often a function of people and process as it is a failure in technology. While hardware and software fails often, humans and their involvement in the process is a very predictable drag on the availability of all systems.

It's important to note that this book won't get into how to design a microservices architecture for failure, which is a huge part of coping with some (or all) system failures in a cluster scheduling and networking system such as Kubernetes.

There's another important concept that's important to consider: graceful degradation.

Graceful degradation is the idea that you build functionality in layers and modules, so even with the catastrophic failure of some pieces of the system, you're still able to provide some level of availability. There is a corresponding term for the progressive enhancement that's followed in web design, but we won't be using that pattern here. Graceful...