微服务-基于Grpc的进程通信-Grpc服务注册与发现 (4-2)

在上一篇《微服务-基于Grpc的进程通信-简单使用 (4)》中，简单介绍了Grpc的使用，本文继续深入，完善Consul的注册和发现功能

1.引入包NConsul.AspNetCore

 

2.Grpc服务注册

创建NConsulHelper帮助类

public static async Task UseGRPCConsul(this IApplicationBuilder app, ConsulConfigModel consulConfigModel, HealConfigMol healConfigMol)
{
    using ConsulClient nconsulClient = new ConsulClient(c =>
    {
        c.Address = new Uri($"http://{consulConfigModel.IP}:{consulConfigModel.Port}");
        c.Datacenter = "dc1";
    });

    await nconsulClient.Agent.ServiceRegister(new AgentServiceRegistration()
    {
        ID = "grpcserviceID" + healConfigMol.IP + ":" + healConfigMol.CheckPort,
        Name = healConfigMol.GroupName,
        Address = healConfigMol.IP,
        Port = healConfigMol.CheckPort,
        Tags = healConfigMol.Tag,
        Check = new AgentServiceCheck()
        {
            Interval = TimeSpan.FromSeconds(12),
            Timeout = TimeSpan.FromSeconds(5),
            DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(20),
            GRPC = $"{healConfigMol.IP}:{ healConfigMol.CheckPort}",
            GRPCUseTLS = false
        }

    });
}

创建 ConsulConfigModel类

public class ConsulConfigModel
{
    public string IP { get; set; }

    public int Port { get; set; }
}

创建 HealConfigMol类

public class HealConfigMol
{
    public string GroupName { get; set; }
    public string IP { get; set; }
    public int Port { get; set; }
    public int CheckPort { get; set; }
    public string[] Tag { get; set; }
}

3.Grpc服务的健康检查

安装官方健康检查组件，Grpc.HealthCheck

添加实现类 HealthCheckService继承 Health.HealthBase,重写方法

public class HealthCheckService : Health.HealthBase
{
    public override Task<HealthCheckResponse> Check(HealthCheckRequest request, ServerCallContext context)
    {
        //TODO:检查逻辑
        return Task.FromResult(new HealthCheckResponse() { Status = HealthCheckResponse.Types.ServingStatus.Serving });
    }
    
    public override async Task Watch(HealthCheckRequest request, IServerStreamWriter<HealthCheckResponse> responseStream, ServerCallContext context)
    {
        //TODO:检查逻辑
        await responseStream.WriteAsync(new HealthCheckResponse()
        { Status = HealthCheckResponse.Types.ServingStatus.Serving });
    }
}

 

4.Startup.cs配置

 app.UseGRPCConsul(
            new ConsulConfigModel() { IP = "127.0.0.1", Port = 8500 },
            new HealConfigMol
            {
                IP = this.Configuration["ip"],
                Port = int.Parse(this.Configuration["Port"]),
                CheckPort = int.Parse(this.Configuration["Port"]),
                GroupName = "GRpcGroupName",
                Tag = new string[] { "Tag" }  
            });
      

endpoints.MapGrpcService<HealthCheckService>();

 

5.Consul验证

启动Consul

 

 

 打开http://lcoahost:8500，如下图所示

运行MicService.GrpcServe,cmd中输入命令行：

dotnet MicService.GrpcServer.dll --port=8200 --ip="127.0.0.1" --url="https://*:8200"

 

再次查看Consul界面，GrpcGroupName的服务注册成功，健康检查通过

 

 

 

6.Grpc服务发现

Grpc注册成功后，在客户端通过Consul发现该服务，实际的集群使用过程中，可以配置权重策略实现负载。

客户端引入Consul包

代码如下： 

#region Consul发现
string url = "http://GRpcGroupName";
ConsulClient client = new ConsulClient(s =>
{
    s.Address = new Uri("http://127.0.0.1:8500");
    s.Datacenter = "dc1";
});
var response = client.Agent.Services().Result.Response;

Uri uri = new Uri(url);
string groupame = uri.Host;
AgentService agentService = null;

var serviceDictionary = response.Where(s => s.Value.Service.Equals(groupame, StringComparison.OrdinalIgnoreCase)).ToArray();
{

    //有多个服务 选择一个 用到负载均衡策略 此处省略策略实现

    agentService = serviceDictionary[0].Value;
}
url = $"{uri.Scheme}://{agentService.Address}:{agentService.Port}";
#endregion


AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

//创建通道
var channel = GrpcChannel.ForAddress(url);

//创建客户端代理
var clienter = new GreeterClient(channel);

//服务端调用
var reply = await clienter.SayHelloAsync(new HelloRequest { Name = "客户端传参" });

Console.WriteLine(reply.Message);

Console.ReadLine();

 

服务端和客服端基本调试完成，但实际开发中，proto文件的拷贝和ItemGroup配置较为繁琐，不适合扩展，引入protobuf-net.Grpc用来简化Grpc的开发

 

以上仅用于学习和总结。

 

参考文档：

https://cloud.tencent.com/developer/article/1545928

 

附源码：

链接：https://pan.baidu.com/s/1NVcb52dGokDP7yODTlNSwg

提取码：yttu