我有以下基于微服务的node.js程序：posts负责创建帖子并通过axiosPOST请求向event bus发送相应的事件。event bus还可以在启动时通过axios GET请求与posts建立连接。从event bus到posts的GET请求成功，但从posts到event bus的POST请求失败，错误为getaddrinfo ENOTFOUND event-bus-srv。posts和event bus都运行在同一个节点中由kubernetes管理的Pod中。维斯URL http://localhost:31218/，只有posts可供用户使用。当我使用postman发送到端点http://localhost:31218/posts时，我成功地接收到代码201，但事件从未转发到event bus。我的问题是：什么是导致getaddrinfo ENOTFOUND event-bus-srv和我如何修复它？
相关代码：

1. posts index.js
   1.事件总线index.js
   1.事件总线KUBERNETES部署文件
   1.发布Kubernetes部署文件
   1.发布KUBERNETES节点端口文件

_____________________________________POSTS___________________________________________
const express = require('express');
const { randomBytes } = require('crypto');
const bodyParser = require('body-parser');
const cors = require('cors');
const axios = require('axios');

const app = express();
app.use(cors());
app.use(bodyParser.json());

const posts = {};

app.get('/posts', (req, res) => {
  res.send(posts);
});

app.post('/posts', async(req, res) => {
  const id = randomBytes(4).toString('hex');
  const { title } = req.body;
  posts[id] = {
    id, title
  };

  await axios.post('http://event-bus-srv:4005/events', {
      type: 'PostCreated',
      data: {
        id, title
      }
  }).catch((err) => {
    console.log("сбой такой: " + err.message);
  });

  res.status(201).send(posts[id]);
});

app.post('/events', (req, res) => {
  res.status(200);
})

app.listen(4000, () => {
  console.log('Listening to port ' + 4000);
});

_____________________________________EVENT BUS___________________________________________
const express = require('express');
const bodyParser = require('body-parser');
const axios = require('axios');

const app = express();
app.use(bodyParser.json());

const events = [];

app.get('/events', (req, res) => {
    res.send(events);
});

app.post('/events', (req, res) => {
    const event = req.body;

    events.push(event);

    axios.post('http://posts-clusterip-svr:4000/events', event).catch((err) => {
        console.log(err.message);
      });

    res.send({status: 'OK'});
});

app.listen(4005, async() => {
    console.log("listening to " + 4005);
    const res = await axios.get('http://posts-clusterip-svr:4000/posts').catch((err) => {
      console.log("сбой такой: " + err.message);
    });
});

___________EVENT BUS KUBERNETES DEPLOYMENT/SERVICE FILE_________________________________

apiVersion: apps/v1
kind: Deployment
metadata: 
  name: event-bus-depl
spec:
  replicas: 1
  selector:
    matchLabels:
      app: event-bus
  template:
    metadata:
      labels:
        app: event-bus
    spec:
      containers:
        - name: event-bus
          image: wliamwhite/event-bus:latest
---
apiVersion: v1
kind: Service
metadata:
  name: event-bus-svr
spec:
  selector:
    app: event-bus
  type: ClusterIP
  ports:
    - name: event-bus
      protocol: TCP
      port: 4005
      targetPort: 4005

___________POSTS KUBERNETES DEPLOYMENT/SERVICE FILE_____________________________________
apiVersion: apps/v1
kind: Deployment
metadata: 
  name: posts-depl
spec:
  replicas: 1
  selector:
    matchLabels:
      app: posts
  template:
    metadata:
      labels:
        app: posts
    spec:
      containers:
        - name: posts
          image: wliamwhite/posts:latest
---
apiVersion: v1
kind: Service
metadata:
  name: posts-clusterip-svr
spec:
  type: ClusterIP
  selector:
    app: posts
  ports:
    - name: posts
      protocol: TCP
      port: 4000
      targetPort: 4000

___________POSTS KUBERNETES NODEPORT FILE_________________________________________
apiVersion: v1
kind: Service
metadata:
  name: posts-svr
spec:
  type: NodePort
  selector:
    app: posts
  ports:
    - name: posts
      protocol: TCP
      port: 4000
      targetPort: 4000

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