To help you get started, we've collected the most common ways that nacos is being used within popular public projects.

midwayjs / midway-examples / demo-nacos / src / service / namingService.ts View on Github

async init() {
    this.nacosClient = new NacosNamingClient({
      ...this.nacosConfig,
      logger: this.logger,
      namespace: 'public',
    });
    await this.nacosClient.ready();

    // 这里的服务名请从 nacos 服务上找
    this.nacosClient.subscribe('nacos.test.3', hosts => {
      console.log('-----------naming result start --------------');
      console.log(hosts);
      console.log('-----------naming result end--------------');
    });
  }

View more ways to use nacos

nacos-sdk-nodejs

Nacos Node.js SDK

Install

npm install nacos --save

Version Mapping

Usage

Service Discovery

'use strict';

const NacosNamingClient = require('nacos').NacosNamingClient;
const logger = console;

const client = new NacosNamingClient({
  logger,
  serverList: '127.0.0.1:8848', // replace to real nacos serverList
  namespace: 'public',
});
await client.ready();

const serviceName = 'nodejs.test.domain';

// registry instance
await client.registerInstance(serviceName, {
  ip: '1.1.1.1',
  port: 8080,
});
await client.registerInstance(serviceName, {
  ip: '2.2.2.2',
  port: 8080,
});

// subscribe instance
client.subscribe(serviceName, hosts => {
  console.log(hosts);
});

// deregister instance
await client.deregisterInstance(serviceName, {
  ip: '1.1.1.1',
  port: 8080,
});

Config Service

import {NacosConfigClient} from 'nacos';   // ts
const NacosConfigClient = require('nacos').NacosConfigClient; // js

// for find address mode
const configClient = new NacosConfigClient({
  endpoint: 'acm.aliyun.com',
  namespace: '***************',
  accessKey: '***************',
  secretKey: '***************',
  requestTimeout: 6000,
});

// for direct mode
const configClient = new NacosConfigClient({
  serverAddr: '127.0.0.1:8848',
});

// get config once
const content= await configClient.getConfig('test', 'DEFAULT_GROUP');
console.log('getConfig = ',content);

// listen data changed
configClient.subscribe({
  dataId: 'test',
  group: 'DEFAULT_GROUP',
}, content => {
  console.log(content);
});

// publish config
const content= await configClient.publishSingle('test', 'DEFAULT_GROUP', '测试');
console.log('getConfig = ',content);

// remove config
await configClient.remove('test', 'DEFAULT_GROUP');

NacosConfigClient options: ClientOptions

default value: ClientOptions default value

APIs

Service Discovery

• registerInstance(serviceName, instance, [groupName]) Register an instance to service.
  • serviceName {String} Service name
  • instance {Instance}
    • ip {String} IP of instance
    • port {Number} Port of instance
    • [weight] {Number} weight of the instance, default is 1.0
    • [ephemeral] {Boolean} active until the client is alive, default is true
    • [clusterName] {String} Virtual cluster name
  • [groupName] {String} group name, default is DEFAULT_GROUP
• deregisterInstance(serviceName, ip, port, [cluster]) Delete instance from service.
  • serviceName {String} Service name
  • instance {Instance}
    • ip {String} IP of instance
    • port {Number} Port of instance
    • [weight] {Number} weight of the instance, default is 1.0
    • [ephemeral] {Boolean} active until the client is alive, default is true
    • [clusterName] {String} Virtual cluster name
  • [groupName] {String} group name, default is DEFAULT_GROUP
• getAllInstances(serviceName, [groupName], [clusters], [subscribe]) Query instance list of service.
  • serviceName {String} Service name
  • [groupName] {String} group name, default is DEFAULT_GROUP
  • [clusters] {String} Cluster names
  • [subscribe] {Boolean} whether subscribe the service, default is true
• getServerStatus() Get the status of nacos server, 'UP' or 'DOWN'.
• subscribe(info, listener) Subscribe the instances of the service
  • info {Object}|{String} service info, if type is string, it's the serviceName
  • listener {Function} the listener function
• unSubscribe(info, [listener]) Unsubscribe the instances of the service
  • info {Object}|{String} service info, if type is string, it's the serviceName
  • listener {Function} the listener function, if not provide, will unSubscribe all listeners under this service

Config Service

• async function getConfig(dataId, group)
  • {String} dataId - data id
  • {String} group - group name
• async function publishSingle(dataId, group, content)
  • {String} dataId - data id
  • {String} group - group name
  • {String} content - content you want to publish
• async function remove(dataId, group)
  • {String} dataId - data id
  • {String} group - group name
• function subscribe(info, listener)
  • {Object} info
    • {String} dataId - data id
    • {String} group - group name
  • {Function} listener - callback handler
• function unSubscribe(info, [listener])
  • {Object} info
    • {String} dataId - data id
    • {String} group - group
  • {Function} listener - callback handler（optional，remove all listener when it is null）

Questions & Suggestions

Please let us know how can we help. Do check out issues for bug reports or suggestions first.

PR is welcome.

nacos-sdk-nodejs ding group ： 44654232

License

Apache License V2