Investigating Kubernetes Network Errors

Libraries: If you want this lab, consider one of these libraries.
Cloud

Investigating Kubernetes Network Errors

You are a container engineer at Cube4Lyf, an e-gaming platform geared towards puzzle and logic games. Your team has been working on migrating Cube4Lyf's first hit title, Cubecraft, into Kubernetes. The portal app should have access to both the game engine pods and the game's shop pods (via services). However, the new network policies are preventing communication. You need to diagnose the issue(s) and restore connectivity.

Get started Contact sales

Lab Info

Level

Advanced

Last updated

Sep 20, 2025

Duration

45m

Challenge

Objective 1

Identify and correct the error preventing the portal pod from accessing shop pods.

Challenge

Objective 2

Identify and correct the error preventing the portal pod from accessing game-engine pods.

Sample Ingress block from a network policy:

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: game-engine-policy
spec:
  podSelector:
    matchLabels:
      app: game-engine
  policyTypes:
  - Ingress
  - Egress
  egress:
  - to:
    - podSelector:
        matchLabels:
          game-engine-access: "true"
    ports:
    - protocol: TCP
      port: 80
  ingress:
  - from:
    - podSelector:
        matchLabels:
        game-engine-access: "true"
    ports:
    - protocol: TCP
    port: 80

About the author

Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

Real skill practice before real-world application

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.

Learn by doing

Engage hands-on with the tools and technologies you’re learning. You pick the skill, we provide the credentials and environment.

Follow your guide

All labs have detailed instructions and objectives, guiding you through the learning process and ensuring you understand every step.

Turn time into mastery

On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.