jenkins

apiVersion: v1
kind: Service
metadata:
  name: ci-jenkins
  labels:
    name: ci-jenkins
spec:
  # if your cluster supports it, uncomment the following to automatically create
  # an external load-balanced IP for the frontend service.
  #type: LoadBalancer
  ports:
    # the port that this service should serve on
    - name: http
      port: 80
      targetPort: 8080
    - name: slave
      port: 49187
      targetPort: 49187
  selector:
    name: ci-jenkins

proxy

apiVersion: v1
kind: Service
metadata:
  name: nginx-app-proxy
  labels:
    name: nginx-app-proxy
spec:
  # if your cluster supports it, uncomment the following to automatically create
  # an external load-balanced IP for the frontend service.
  type: LoadBalancer
  ports:
    # the port that this service should serve on
    - name: http
      port: 80
  selector:
    name: nginx-app-proxy

vhost

server {
    listen 80;
    server_name jenkins.elephone.com;

    location / {
        proxy_pass http://jenkins;
        add_header  X-Upstream  "http://jenkins";
    }

}

upstream jenkins {
    server ci-jenkins;
}