nestjs配置nacos

在NestJS中使用Nacos进行配置管理的步骤如下：

1. 安装nacos-sdk-nodejs

npm install nacos-sdk-nodejs --save

2. 在app.module.ts中引入ConfigModule

import { Module } from '@nestjs/common';
import { ConfigModule } from '@nestjs/config';
import { NacosConfig } from 'nacos';

@Module({
  imports: [
    ConfigModule.forRoot({
      isGlobal: true,
      load: [],
      expandVariables: true,
      cache: true,
      ignoreEnvFile: true,
      load: [() => ({
        nacos: {
          host: 'localhost',
          port: 8848,
          namespace: 'public',
          dataId: 'nest-config',
          group: 'DEFAULT_GROUP',
        },
      })],
    }),
  ],
})
export class AppModule {}

3. 创建一个config.service.ts文件

import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { NacosConfigClient } from 'nacos';

@Injectable()
export class NacosConfigService {
  private nacosConfigClient: NacosConfigClient;

  constructor(private readonly configService: ConfigService) {
    const nacosConfig = this.configService.get('nacos');
    this.nacosConfigClient = new NacosConfigClient({
      serverAddr: `${nacosConfig.host}:${nacosConfig.port}`,
      namespace: nacosConfig.namespace,
    });
  }

  async get(key: string): Promise<string> {
    return await this.nacosConfigClient.getConfig(nacosConfig.dataId, nacosConfig.group);
  }
}

4. 在需要使用配置的地方注入NacosConfigService

import { Injectable } from '@nestjs/common';
import { NacosConfigService } from './config.service';

@Injectable()
export class AppService {
  constructor(private readonly configService: NacosConfigService) {}

  async getHello(): Promise<string> {
    const value = await this.configService.get('key');
    return `Hello ${value}!`;
  }
}