What Did We Do?

We explored quite a few topics that are beyond "normal" Kubernetes usage. We learned how to scale Pods using HorizontalPodAutoscaler. We saw that scaling Pods does not provide enough benefits if we cannot scale cluster nodes as well. We explored how to do just that using Cluster Autoscaler. Unfortunately, it is currently available only for AWS, GKE, and AKS.

While scaling Pods and nodes is essential, we had to gather metrics as well. They give us insights into the behavior of our clusters and applications running inside it. For that, we adopted Prometheus. More importantly, we saw how we can leverage Alertmanager to create notifications that will alert us when there is an issue, instead of staring at a screen waiting for a graph to reach a "red line".

We learned that gathering metrics from exporters might not be enough, so we instrumented our...

Contributions

Like the previous books, this one was also a collaboration effort. Many helped shape this book through discussions, notes, and bug reports. I was swarmed with comments through DevOps20 (http://slack.devops20toolkit.com/) Slack (often private) messages and emails. The conversations I had with the readers of the early editions of the book influenced the end result significantly. I'm grateful to have such a great community behind me. Thank you for helping me make this book great.

A few rose above the crowd.

Vadim Gusev helped to proofread and discuss book structure from the novice point of view.

In his own words...

Vadim is a young IT specialist that started his career as a network engineer but was so fascinated by the idea of clouds and containers, that he decided to switch his career path to DevOps. He works in a small startup and leads it to bright containerized...