Consul+Ocelot+.Net Core Api+IdentityServer4（三）

服务项目建立

新建一个 Asp.net core Web Api 项目，取名为 ApiA (ApiB的配置与此相同)

引入 Consul Nuget 包

Consul 注册及健康检查

修改 appsettings.json，添加相关配置节点

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*",
  "urls": "http://localhost:6001", //当前服务的网址，根据项目属性中配置的进行修改
  "consul_urls": "http://localhost:8500", //Consul服务的地址
  "service_id": "1", //当前服务的ID
  "service_name": "ApiA" //当前服务的名称ApiA或ApiB
}

添加公共帮助类

新建一个类 PublicHelper.cs，内容如下

public class PublicHelper
{
    /// <summary>
    /// 向Consule服务注册
    /// </summary>
    /// <param name="configuration"></param>
    public static void RegSerToConsul(IConfiguration configuration)
    {
        string urls = configuration["urls"].Trim('/'); // 当前服务的网址
        string jconsulUrls = configuration["consul_urls"]; // Consul服务的网址
        string serviceId = configuration["service_id"]; // 当前服务的ID
        string serviceName = configuration["service_name"]; //当前服务的名称

        //健康检查连接资料
        var client = new ConsulClient(_ => _.Address = new Uri(jconsulUrls));
        var checkAgent = new AgentServiceCheck()
        {
            DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(5), // 启动后5秒开始向Consul服务注册
            Interval = TimeSpan.FromSeconds(20), // 间隔20秒健康检查一次当前服务是否健康
            HTTP = $"{urls}/api/Health", //健康检查的接口
            Timeout = TimeSpan.FromSeconds(10) //超时时间
        };

        string[] urlArr = urls.Split(new string[] { ":" }, StringSplitOptions.RemoveEmptyEntries);
        int port = 80;
        if (urlArr.Length > 2)
        {
            port = int.Parse(urlArr[2]);
        }
        string address = urlArr[1].TrimStart("//".ToArray());

        //当前服务的相关连接信息
        AgentServiceRegistration registration = new AgentServiceRegistration()
        {
            Checks = new[] { checkAgent },
            ID = $"{serviceName}-{serviceId}",
            Name = serviceName,
            Address = address,
            Port = port
        };
        client.Agent.ServiceRegister(registration).Wait();
    }
}

修改 Startup.cs ，进行服务注册

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseHttpsRedirection();

    app.UseRouting();

    app.UseAuthorization();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
    
    //调用公共帮助类的注册方法
    PublicHelper.RegSerToConsul(Configuration);
}

添加健康检查接口

新建一个Api控制器，命名HealthConroller

namespace ApiA.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class HealthController : ControllerBase
    {
        public string Get() => "ok";
    }
}

添加测试接口

新建一个Api控制器，命名为 UserInfoController

namespace ApiA.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class UserInfoController : ControllerBase
    {
        public JsonResult Post()
        {
            return new JsonResult(new
            {
                user_no = "AdminA",
                user_name = "管理员A",
                sex = "男",
                tel = "13000000000"
            });
        }
    }
}

至此项目配置完成，已可以通过Ocelot网关进行访问。

验证测试

1. 同时启动 OcelotService、ApiA、ApiB，查看Consul-ui http://localhost:8500 是否注册成功
   
   可以看到ApiA和ApiB已注册成功
2. 通过Ocelot网关访问ApiA的接口UserInfo
   
   通过上图，可以看到能过Ocelot网关访问ApiA项目的接口UserInfo成功