Expose a node application running in a Kubernetes DaemonSet by running a socat DaemonSet

Node-Gateway-DaemonSet.yaml

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: gateway-daemon-set
  namespace: default
spec:
  template:
    metadata:
      labels:
        app: gateway-app
      name: gateway
    spec:
      containers:
      - image: gateway:0.0.1
        ports:
          - containerPort: 3000
            hostPort: 3000
        name: gateway-app
        env:
        - name: NODE_ENV
          value: staging
      hostNetwork: true
      hostPID: true

Socat-DaemonSet.yaml

apiVersion: extensions/v1beta1
kind: DaemonSet 
metadata:
  name: socat-ds
  namespace: default
spec:
  template:
    metadata:
      labels:
        app: socat-app
      name: socat
    spec:
      containers:
      - image: socat:0.0.1
        ports:
          - containerPort: 80
            hostPort: 80
        name: socat
      hostNetwork: true
      hostPID: true

Z_Dockerfile.socat

FROM alpine
RUN  apk update && apk add curl net-tools socat
CMD  ["socat","TCP4-LISTEN:80,fork","TCP4:localhost:3000"]