ambassador pattern

ambassador.yaml

apiVersion: v1
kind: Service
metadata:
  name: common-ftp-svc
  namespace: myns
spec:
  type: ClusterIP
  ports:
    - port: 21
      protocol: TCP
      targetPort: 21
  selector:
    run: common-ftp-server
status:
  loadBalancer: {}
---
apiVersion: v1
kind: Pod
metadata:
  labels:
    run: common-ftp-server
  name: common-ftp-server
  namespace: myns
spec:
  containers:
    - args:
        - sh
        - -c
        - mkdir /var/ftp && chmod ugo+rw /var/ftp && tcpsvd -vE 0.0.0.0 21 ftpd -Aw /var/ftp
      image: busybox
      name: ftp-server
      ports:
        - containerPort: 21
      resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Always
status: {}