Kubernetes Lesson2 Kubectl Demos

Kubernetes Lesson 2 Demo

A. Nginx NodePort example

1. Creating a Namespace

kubectl create namespace my-nginx

2. Creating A deployment

kubectl create deployment my-nginx --image=nginx --replicas=2 -n=my-nginx
kubectl create deployment my-nginx --image=nginx

3. Verifying the deployment

kubectl get pods -n=my-nginx
kubectl get pods -o wide -n=my-nginx

kubectl get all -n=my-nginx
kubectl get all -o wide -n=my-nginx

4. Scale the deployment

kubectl scale --replicas=2 deployment/my-nginx -n=my-nginx

5. Verifying the deployment

kubectl get pods -o wide -n=my-nginx

6. Creating a Service

kubectl create service nodeport nginx --tcp=80:80 -n=my-nginx

7. Verifying the service

kubectl get service -n=my-nginx
kubectl get all -o wide -n=my-nginx
kubectl get svc -n=my-nginx

8. Accessing Nginx from inside the cluster

 kubectl get nodes -o wide

curl <NodeIP>:<NodePort>

curl 10.154.2.93:port
curl 10.154.2.95:port
curl 10.154.2.89:port

curl 10.154.2.89:80

open in browser http://10.154.2.89:80

9. Clean-up

kubectl delete namespace my-nginx

B. Nginx Autoscale example

1. Creating a Namespace

kubectl create namespace my-nginx

2. Creating A deployment

kubectl create deployment my-nginx --image=nginx --replicas=1 -n=my-nginx

3. Auto-scaling

# Auto scale a deployment "my-nginx", with the number of pods between 2 to 10, target CPU utilization at a default value that server applies:
# kubectl autoscale deploy my-nginx --min=2 --max=10 -n=my-nginx

# Auto scale a replication controller "my-nginx", with the number of pods between 1 to 5, target CPU utilization at 50%:
kubectl autoscale deploy my-nginx --min=2 --max=10 --cpu-percent=50 -n=my-nginx

4. Verifying the deployment

kubectl get pods -o wide -n=my-nginx
kubectl get all -o wide -n=my-nginx

5. Clean-up

kubeclt delete namespace my-nginx

Bibliography

Using Kubectl Expose | Tutorial and Best Practices
How to Install, Configure, and Deploy NGINX on a Kubernetes Cluster kubectl autoscale

Disclaimer

I did the research to create this document based on information that is not mine