To Register A NodeJs Application On Eureka Server

Posted By : Gursahib Singh | 29-Apr-2018

nodejs

In this blog, we will see how to register a NodeJs application as a eureka-client on the Eureka server.

To make a nodejs application as a eureka-client we first need to install the eureka-js client using npm. The command for the installation of the same in ubuntu is "npm install eureka-js-client --save"

The next step is to make any sample.js file in the nodejs project folder. In this file, we will first add the details of the NodeJs application in the object of the Eureka client.

    'use strict';
	const Eureka = require('eureka-js-client').Eureka;
	const client = new Eureka({
	instance: {
	    app: 'jqservice',
	    hostName: 'localhost',
	    ipAddr: '127.0.0.1',
	    port: {
	      '$': 3000,
	      '@enabled': 'true',
	    },
	  vipAddress: 'jq.test.something.com',
	  statusPageUrl: 'http://localhost:3000/api/login',
	  dataCenterInfo: {
	    '@class': 'com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo',
	    name: 'MyOwn',
	    },
	  },
	})

After that, we will specify the details i.e port of the Eureka server in the client object which we earlier made.

		eureka: {
	    // eureka server host / port
	    host: '127.0.0.1',
	    port: 8090,
	    servicePath: '/eureka/apps/'
	  }

To register the application on the Eureka server, we need to invoke the client object which is done by the following code:

     function connectToEureka() {              
     client.logger.level('debug');  
     client.start(function(error) {
     console.log(JSON.stringify(error) || 'Eureka registration complete');   }); }
     connectToEureka();

In this case, I have made a spring boot application as a Eureka server. To register an application as Eureka Server, please follow the following blogs:

1. https://my.oodles.io/blogs/To%20Setup%20Eureka%20Server%20And%20Register%20A%20Microservice.

2. https://my.oodles.io/blogs/Registering%20A%20Spring%20Boot%20Microservice%20On%20Eureka%20Server.

After saving all these changes run the Eureka Server application.

After successfully saving the sample.js file in the nodejs project folder run the following command in the node.js command prompt.

"node sample.js"

This will register the NodeJs application as a Eureka Client on the Eureka server.