Checkpoint

Run through the steps below to deploy a simple frontend application and confirm that you can connect to your environment.

Deploy helloworld application

Create a namespace.

kubectl create ns helloworld

Deploy an application.

kubectl -n helloworld create deploy helloapp --image=shinojosa/kiab:0.8

The deploy function groups a set of pods around a common application or purpose. --image= tells kubernetes what to deploy.

Tell the deployment to respond on port 80.

kubectl -n helloworld expose deploy helloapp --port=80 --type=NodePort

Create a host alias ingress yaml.

cat > hello-ingress.yaml << EOL
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: hello-ingress
  namespace: helloworld
spec:
  rules:
  - host: helloworld.192.168.1.118.nip.io
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: helloapp
            port:
              number: 80
EOL

Kubernetes can read this yaml file to configure many components.
kind: Ingress tells Kubernetes we’re creating an ingress. Nginx watches for these and automatically sets up configuration.
name: helloworld-ingress sets the name of this ingress to helloword. Can be anything.
namespace: helloworld sets the namespace. Can be anything. serviceName: helloworld