Troubleshooting Daemonsets in Kubernetes

45 minutes
  • 2 Learning Objectives

About this Hands-on Lab

You are a container engineer at Cube4Lyf, an e-gaming platform geared toward puzzle and logic games. Their Kubernetes cluster is not performing as expected. In order to improve visibility in their cluster, the team has asked you to install Prometheus on each node as a daemonset. However, not all Pods are deploying as expected. You’ve been asked to troubleshoot the issue and ensure the monitoring Pods are deployed on each node.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Identify the issue on the worker node preventing a pod from deploying to k8s-worker1.

The lab has a logging daemonset deployed. It is not deploying pods to two of the three nodes. Identify the issue with the k8s-worker1 node preventing a pod from deploying.

Identify the configuration issue that is preventing a Pod from deploying to the control plane node.

The daemonset is not deploying a pod to the control plane node. Identify the issue in the daemonset configuration preventing it from doing so and update it accordingly.

Tolerations spec block:

 - key:
   operator: Exists
   effect: NoSchedule

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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