This stands up a service in kubernetes that will echo back everything sent to it via http on port 80

echoserver.yaml

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: echoserver
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: echoserver
  template:
    metadata:
      labels:
        app: echoserver
    spec:
      containers:
      - image: ealen/echo-server:latest
        imagePullPolicy: IfNotPresent
        name: echoserver
        ports:
        - containerPort: 80
        env:
        - name: PORT
          value: "80"
---
apiVersion: v1
kind: Service
metadata:
  name: echoserver
  namespace: default
spec:
  ports:
    - port: 80
      targetPort: 80
      protocol: TCP
  type: ClusterIP
  selector:
    app: echoserver

Usage

kubectl apply -f echoserver.yaml
kubectl port-forward svc/echoserver 8000:80
curl -X POST -d '{"some": "data"}' localhost:8000
kubectl logs -l app=echoserver