u1i/k3s-quickstart

k3s Quickstart

You need:

• Virtual machine (on the cloud?) with 2GB RAM (or more)
• Operating System: Linux (Ubuntu / Debian / CentOS)
• Shell access as root

1 – Install k3s

curl -sfL https://get.k3s.io | sh -

Check for Ready node,

takes maybe 30 seconds

Run

k3s kubectl get node

until the output looks like this:

NAME STATUS ROLES AGE VERSION
instance-1 Ready control-plane,master 72s v1.20.2+k3s1

2 – Create a Service on Kubernetes

k3s kubectl create deployment myapp --image=u1ih/hello

Show running pods and deployments

k3s kubectl get pods --all-namespaces

k3s kubectl get deployments --all-namespaces

3 – Expose Service

k3s kubectl expose deployment myapp --port=8080 --type=LoadBalancer

List Services

k3s kubectl get services --all-namespaces

4 – Use the new Service

curl localhost:8080

Hello, world!

---

Running on myapp-64c8f4d567-xlfrn

5 Scale up!

k3s kubectl autoscale deployment myapp --min=5 --max=10

k3s kubectl get deployment

Run the curl command again a couple of times! Do you notice something?

curl localhost:8080

6 – Clean Up

k3s kubectl delete deployment my-app k3s kubectl delete service my-app