Kubectl Commands for Pod, ReplicaSet and Deployment

🚀 Kubernetes Pod, ReplicaSet & Deployment – Commands Cheat Sheet (with comments)

🟢 POD Commands

kubectl run nginx --image=nginx
# Create a simple pod quickly (imperative way)

kubectl run nginx --image=nginx --dry-run=client -o yaml > pod.yaml
# Generate pod YAML without creating it

kubectl apply -f pod.yaml
# Create pod from YAML

kubectl get pods
# List all pods

kubectl get pods -o wide
# Show pods with node + IP info

kubectl describe pod nginx
# Detailed info + events (best for troubleshooting)

kubectl logs nginx
# Show container logs

kubectl logs -f nginx
# Stream logs live (follow mode)

kubectl exec -it nginx -- bash
# Enter inside container shell

kubectl delete pod nginx
# Delete pod

🟡 REPLICASET Commands

kubectl apply -f rs.yaml
# Create ReplicaSet from YAML

kubectl get rs
# List ReplicaSets

kubectl describe rs myrs
# Detailed ReplicaSet info

kubectl scale rs myrs --replicas=5
# Increase/decrease number of pods

kubectl get pods -l app=myapp
# Show pods created by this ReplicaSet (label filter)

kubectl delete rs myrs
# Delete ReplicaSet and its pods

🔵 DEPLOYMENT Commands (Most used in real projects 🔥)

kubectl create deployment nginx --image=nginx
# Create deployment quickly

kubectl create deployment nginx --image=nginx --replicas=3
# Create deployment with 3 replicas

kubectl create deployment nginx --image=nginx --dry-run=client -o yaml > deploy.yaml
# Generate deployment YAML template

kubectl apply -f deploy.yaml
# Create/update deployment from YAML

kubectl get deploy
# List deployments

kubectl describe deploy nginx
# Detailed deployment info

kubectl scale deploy nginx --replicas=5
# Scale pods count

kubectl set image deploy/nginx nginx=nginx:1.25
# Update container image (rolling update)

kubectl rollout status deploy/nginx
# Watch rollout progress

kubectl rollout history deploy/nginx
# Show rollout versions

kubectl rollout undo deploy/nginx
# Rollback to previous version

kubectl rollout restart deploy/nginx
# Restart all pods safely

kubectl delete deploy nginx
# Delete deployment + ReplicaSet + pods

🔥 Common Commands (Works for all resources)

kubectl get all
# Show everything (pods, rs, deploy, svc)

kubectl get pods -w
# Watch changes live

kubectl edit deploy nginx
# Edit resource directly in editor

kubectl explain deployment.spec.template.spec.containers
# See YAML field explanation (very useful for exams)

kubectl delete -f deploy.yaml
# Delete resources created from file

kubectl get pods -l app=nginx
# Filter using labels

🎯 Memory trick (super helpful)

Think like this:

Pod → run
ReplicaSet → scale
Deployment → update + rollback

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