Troubleshooting Scheduling in Kubernetes Deployments

45 minutes
  • 2 Learning Objectives

About this Hands-on Lab

You are a container engineer at Cube4Lyf, an e-gaming platform geared towards puzzle and logic games. You’ve just been alerted that there’s an issue with the deployment of a new web service to a staging cluster. The pods are stuck in a ‘Pending’ state. You need to investigate why the pods are not deploying and resolve the issue so the new web service can be assessed in the staging environment. There are a number of other resources currently active in the cluster, some are still needed, and others are not. You’ve been approved to delete any resources with the label `test=true`, if needed.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Identify the Capacity of All Nodes and Compare to the Required Capacity for the New Web Service

Take a look at the deployment.yaml on your lab vm. Run the command kubectl apply -f deployment.yaml, and observe that it does not deploy both pod replicas. Using kubectl, identify the issue preventing the deployment.

Delete Pods with the Label ‘Test=True’ to Allow New Web Service Pods to Be Scheduled

Use kubectl to delete unneeded resources—only delete those with the label test=true! Ensure both replicas of the deployment start successfully.

Additional Resources

  • kubectl Reference Docs:

  • Scheduling in Kubernetes:

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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