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Troubleshooting Docker and Kubernetes Containers

Challenge: Troubleshooting Kubernetes

Explore how to identify and fix common Kubernetes deployment problems such as pods stuck in pending state, image errors, and pod resource overloads. This lesson guides you through practical steps to troubleshoot and optimize your Kubernetes clusters effectively.

We'll cover the following...

Problem 1: Resolving resource error issues

We deployed the application below and it’s not running yet. When we check its status, it shows that the pod is in a pending state. Troubleshoot the issue and figure out a way to resolve it.

YAML
apiVersion: v1
kind: Pod
metadata:
  name: app
spec:
  containers:
  - name: container
    image: busybox
    command: ["/bin/sh", "-c", "while true; do echo 'Running...'; sleep 10; done"]
    resources:
      requests:
        cpu: "6"      
        memory: "10Gi"

Use the following run commands while you practice:

Shell
# To get pod status

kubectl get pods



# To get logs of pod

kubectl logs <pod_name>



# To get more details on pod

kubectl describe pod <pod_name>



# To edit pod

nano pod.yaml



# To delete a pod

kubectl delete pod <pod_name>



# To create a pod after solving the issue

kubectl apply -f pod.yaml
...