.NET5微服务示例-Consul注册中心

Consul官方网址:https://www.consul.io/

Consul有关介绍:https://www.cnblogs.com/shanyou/p/4695131.html

本文代码,文章结尾处提供下载。

 

一、安装Consul

1.官网下载对应版本,并解压出来

2.打开cmd,cd到解压的目录,运行为开发模式(或者翻到底下附录,通过配置文件运行)

//默认ip地址使用127.0.0.1
consul agent -dev

//或者指定ip地址
consul.exe agent -dev -client x.x.x.x

3.命令运行成功后,打开“http://127.0.0.1:8500/”,出现页面即为成功

 

 

二、编写代码

1、整体代码结构:

 

2、SGZ.Framework整体结构介绍

3、SGZ.DepartmentService(部门服务)介绍,SGZ.PersonnelService(人员服务)同理

3.1、整体结构

 3.2、只放了一个获取列表的接口

using Microsoft.AspNetCore.Mvc;
using SGZ.Framework.Models;
using System.Collections.Generic;

namespace SGZ.DepartmentService.Controllers
{
    [Route("api/[controller]/[action]")]
    [ApiController]
    public class DepartmentController : ControllerBase
    {
        [HttpGet]
        public IActionResult GetList()
        {
            var list = new List<DepartmentDto> {
                new DepartmentDto{ ID = "D001", Name = "部门1" },
                new DepartmentDto{ ID = "D002", Name = "部门2" },
                new DepartmentDto{ ID = "D003", Name = "部门3" },
                new DepartmentDto{ ID = "D004", Name = "部门4" },
                new DepartmentDto{ ID = "D005", Name = "部门5" }
            };
            return Ok(list);
        }
    }
}

3.3、健康检查(有结果就行,不需要其它实现)

using Microsoft.AspNetCore.Mvc;
using System;

namespace SGZ.DepartmentService.Controllers
{
    [Route("[controller]")]
    [ApiController]
    public class HealthCheckController : ControllerBase
    {
        [HttpGet]
        public IActionResult Get()
        {
            return Ok(DateTime.UtcNow.ToString());
        }
    }
}

3.4、appsettings.json加入一段配置

  "ConsulConfigs": {
    //数据中心名称
    "DataCenter": "dc1",
    //Consul地址
    "RegistryAddress": "http://127.0.0.1:8500",
    //健康检查地址
    "HealthCheckAddress": "/HealthCheck",
    "ServiceName": "DepartmentService",
    "ServiceScheme": "http",
    "ServiceAddress": "192.168.2.119",
    "ServicePort": 551
  }

3.5、Program.cs的CreateHostBuilder函数改造,绑定配置文件中的地址

public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .ConfigureWebHostDefaults(webBuilder =>
        {
            webBuilder.UseStartup<Startup>();
            var configuration = new ConfigurationBuilder().AddJsonFile("appsettings.json", true).Build();
            string serviceScheme = configuration["ConsulConfigs:ServiceScheme"];
            string serviceAddress = configuration["ConsulConfigs:ServiceAddress"];
            string servicePort = configuration["ConsulConfigs:ServicePort"];
            if (!string.IsNullOrEmpty(serviceScheme)
                && !string.IsNullOrEmpty(serviceAddress)
                && !string.IsNullOrEmpty(servicePort))
            {
                webBuilder.UseUrls($"{serviceScheme}://{serviceAddress}:{servicePort}");
            }
        });

3.6、Startup.cs加入两项

4、SGZ.AggregationService(聚合服务)介绍

4.1、整体结构;因为没有设计这个聚合服务有上游,所以它不需要注册到Consul,也就是不需要健康检查了

 4.2、获取部门服务和人员服务的数据,整合后再返回

[Route("api/[controller]")]
[ApiController]
public class AggregationController : ControllerBase
{
    private readonly IServiceRequest _request;

    public AggregationController(IServiceRequest request)
    {
        _request = request;
    }

    [HttpGet]
    public async Task<IActionResult> Get()
    {
        //var departmentList = await _request.GetAsync<List<DepartmentDto>>("DepartmentService", "/api/Department/GetList");
        //var personnelList = await _request.GetAsync<List<DepartmentDto>>("PersonnelService", "/api/Personnel/GetList");
        //var list = new { departmentList, personnelList };

        var departmentResult = await _request.GetAsync("DepartmentService", "/api/Department/GetList");
        var personnelResult = await _request.GetAsync("PersonnelService", "/api/Personnel/GetList");
        var obj = new { departmentResult, personnelResult };

        return Ok(obj);
    }
}

4.3、appsettings.json也只需加入这点配置

"ConsulConfigs": {
  "DataCenter": "dc1",
  "RegistryAddress": "http://127.0.0.1:8500"
}

4.4、Startup.cs加入这几项

 

三、运行程序

1、不要以“IIS Express”的方式运行,不然不会使用“Program.cs”中绑定的地址

2、以部门服务为例,进入Debug文件夹,修改配置文件中的端口,打开cmd,运行“dotnet SGZ.DepartmentService.dll”,这样就跑起一个部门服务的集群了,然后可以测试你的负载均衡是否OK

3、三个服务都运行起来后,再访问聚合服务的接口“/api/Aggregation”,即可看到返回的数据

 

附录、Consul的集群搭建

1、准备3个节点

2、每个节点里面只有一个json配置文件,Consul配置大全:https://www.cnblogs.com/sunsky303/p/9209024.html

3、以node1为主节点,其配置如下

{
  #数据中心名称
  "datacenter": "dc1",
  #节点所在目录
  "data_dir": "D:/consul/node1",
  #日志等级
  "log_level": "INFO",
  #生产模式
  "server": true,
  "node_name": "node1",
  #主节点有界面就行了,从节点不需要这个选项
  "ui": true,
  "bind_addr": "127.0.0.1",
  "client_addr": "127.0.0.1",
  "advertise_addr": "127.0.0.1",
  #表示要3个节点才能跑
  "bootstrap_expect": 3,
  "ports": {
    "http": 8500,
    "dns": 8600,
    "server": 8300,
    #记住这个端口,配置从节点的时候需要
    "serf_lan": 8301,
    "serf_wan": 8302
  }
}

4、node2和node3为设置为从节点,配置相似,如下

{
  "datacenter": "dc1",
  "data_dir": "D:/consul/node2",
  "log_level": "INFO",
  "server": true,
  "node_name": "node2",
  "bind_addr": "127.0.0.1",
  "client_addr": "127.0.0.1",
  "advertise_addr": "127.0.0.1",
  "ports": {
    "http": 8510,
    "dns": 8610,
    "server": 8310,
    "serf_lan": 8311,
    "serf_wan": 8312
  }
}

5、回到“D:/consul”目录,打开cmd

5.1、搭建主节点

consul agent -config-file=D:/consul/node1/basic.json

5.2、搭建从节点,两个从节点相似,就是需要改下路径;后面的8301,就是主节点配置的“serf_lan”端口

consul agent -config-file=D:/consul/node2/basic.json  -retry-join=127.0.0.1:8301

5.3、运行起3个节点后,再打开“http://127.0.0.1:8500/”,发现consul的数量变为3了,端口也为刚才配置的

 

5.4、使用Nginx做负载均衡示例

 

本文代码:https://files.cnblogs.com/files/shousiji/net5_consul.rar

posted @ 2021-09-14 14:52  水沽籽  阅读(393)  评论(0编辑  收藏  举报