Difficulty: Beginner
Estimated Time: 15 minutes

Basic Kubernetes Observability

This scenario explores the basic techniques for observing the state of Kubernetes using metrics.

In the following steps you will learn how to:

  • access metrics information produced by each cAdvisor in each Kubelet,
  • inspect resources using the Resource Metrics API,
  • viewing metrics reported by Metrics Server.

The scenario introduced some fundamental techniques to inspecting a cluster. Not covered here was logging, tracing, or monitoring with Prometheus. Those topics are covered in other scenarios.

Lessons Learned

With these steps you have learned how to:

  • ✔ access metrics information produced by each cAdvisor in each Kubelet,
  • ✔ inspect resources using the Resource Metrics API,
  • ✔ viewing metrics reported by Metrics Server.

For a deeper understanding of these topics and more join
Jonathan Johnson
at various conferences, symposiums, workshops, and meetups.

Software Architectures ★ Speaker ★ Workshop Hosting ★ Kubernetes & Java Specialist

Basic Kubernetes Observability

Step 1 of 5

Your Kubernetes Cluster

For this scenario, Katacoda has just started a fresh Kubernetes cluster for you. Verify it's ready for your use.

kubectl version --short && \ kubectl get componentstatus && \ kubectl get nodes && \ kubectl cluster-info

The Helm package manager used for installing applications on Kubernetes is also available.

helm version --short

Kubernetes Dashboard

You can administer your cluster with the kubectl CLI tool or use the visual Kubernetes Dashboard. Use this script to access the protected Dashboard.

token.sh

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