Deploy an application to Kubernetes

Outcomes

You should be able to:

• Deploy a simple application

Outline

1. Deploy a simple application

kubectl create deployment nginx --image=nginx
kubectl get deployments
kubectl describe deployment nginx
kubectl get deployment nginx -o yaml

1. Save the deployment to a file and re-apply it

kubectl get deployment nginx -o yaml > nginx.yaml
kubectl delete deployment nginx
kubectl apply -f nginx.yaml
kubectl get pods

1. Duplicate the deployment

cp nginx.yaml nginx2.yaml
sed -i 's/nginx/nginx2/g' nginx2.yaml
kubectl apply -f nginx2.yaml
kubectl delete deployment
kubectl get pods

1. Inspect the deployment

kubectl get deployment nginx -o json
kubectl get deployment nginx -o yaml
kubectl get deployment nginx -o wide
kubectl get deployment nginx -o jsonpath='{.spec}'