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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.

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Path Info

Level

Advanced

Duration

45m

Last updated

Sep 03, 2025

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

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