mkdir k8s-helloworld && cd k8s-helloworld
touch ping.yaml

cat <<EOF >ping.yaml
apiVersion: v1
kind: Service
metadata:
  name: ping-service
spec:
  selector:
    app: ping
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: ping-deployment
  labels:
    app: ping
spec:
  replicas: 3
  selector:
    matchLabels:
      app: ping
  template:
    metadata:
      labels:
        app: ping
    spec:
      containers:
      - name: ping
        image: bpazy/ping:v1.0.0
        ports:
        - containerPort: 8080
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: traefik-ping
  namespace: default
  annotations:
    kubernetes.io/ingress.class: traefik
spec:
  rules:
  - host: ping.me.k3s
    http:
      paths:
      - path:
        pathType: ImplementationSpecific
        backend:
          service:
            name: ping-service
            port:
              number: 80
EOF