kubectl Command Flashcards
Quick reference flashcards for kubectl commands. Test yourself by hiding the answers!
Pod Operations
Q: Create a pod named 'nginx' with nginx image
Answer
kubectl run nginx --image=nginx
Q: Create a pod with specific port exposed
Answer
kubectl run nginx --image=nginx --port=80
Q: Get pods in all namespaces
Answer
kubectl get pods -A
# or
kubectl get pods --all-namespaces
Q: Get pod YAML output
Answer
kubectl get pod nginx -o yaml
Answer
kubectl delete pod nginx --force --grace-period=0
Q: Execute command in pod
Answer
kubectl exec nginx -- ls /
kubectl exec -it nginx -- /bin/bash
Q: Get pod logs
Answer
kubectl logs nginx
kubectl logs nginx -f # follow
kubectl logs nginx --previous # previous container
Deployment Operations
Q: Create deployment with 3 replicas
Answer
kubectl create deployment nginx --image=nginx --replicas=3
Q: Scale deployment
Answer
kubectl scale deployment nginx --replicas=5
Q: Update deployment image
Answer
kubectl set image deployment/nginx nginx=nginx:1.20
Q: Rollback deployment
Answer
kubectl rollout undo deployment/nginx
kubectl rollout undo deployment/nginx --to-revision=2
Q: Check rollout status
Answer
kubectl rollout status deployment/nginx
kubectl rollout history deployment/nginx
Service Operations
Q: Expose deployment as ClusterIP service
Answer
kubectl expose deployment nginx --port=80 --type=ClusterIP
Q: Expose as NodePort
Answer
kubectl expose deployment nginx --port=80 --type=NodePort
Q: Get service endpoints
Answer
kubectl get endpoints nginx
ConfigMap & Secret
Q: Create ConfigMap from literal
Answer
kubectl create configmap myconfig --from-literal=key1=value1 --from-literal=key2=value2
Q: Create ConfigMap from file
Answer
kubectl create configmap myconfig --from-file=config.txt
kubectl create configmap myconfig --from-file=mykey=config.txt
Q: Create Secret from literal
Answer
kubectl create secret generic mysecret --from-literal=password=secret123
Q: Decode secret value
Answer
kubectl get secret mysecret -o jsonpath='{.data.password}' | base64 -d
Namespace & Context
Q: Create namespace
Answer
kubectl create namespace dev
Q: Set default namespace for context
Answer
kubectl config set-context --current --namespace=dev
Q: Get current context
Answer
kubectl config current-context
Q: Switch context
Answer
kubectl config use-context my-cluster
YAML Generation
Q: Generate pod YAML without creating
Answer
kubectl run nginx --image=nginx --dry-run=client -o yaml > pod.yaml
Q: Generate deployment YAML
Answer
kubectl create deployment nginx --image=nginx --dry-run=client -o yaml > deploy.yaml
Q: Generate service YAML
Answer
kubectl expose deployment nginx --port=80 --dry-run=client -o yaml > svc.yaml
Troubleshooting
Q: Describe resource for events
Answer
kubectl describe pod nginx
kubectl describe node worker-1
Q: Get events sorted by time
Answer
kubectl get events --sort-by='.lastTimestamp'
Q: Check resource usage
Answer
kubectl top pods
kubectl top nodes
Q: Debug with temporary pod
Answer
kubectl run debug --image=busybox --rm -it --restart=Never -- sh
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