上一篇文章介绍了.NET Core 中使用gRPC,在微服务中,我们通常要把服务做成服务注册,服务发现的方式,那么这里来说一下gRPC是如何注册到Consul中的。
Consul的安装这里就不介绍了,在之前的篇文章中已经写过:Consul+Ocelot+Polly在.NetCore中使用(.NET5)-Consul服务注册,服务发现
这里Consul已经安装好。
这里沿用上一篇的gRPC的代码,如果服务带api和gRPC的话用http的方式或gRPC的方式注册到可以,http的方式上面文章中的Consul注册和发现中已经有,这里介绍单gRPC的服务的注册。
先在appsettings.json中加入Consul信息代码
{"Logging": {"LogLevel": {"Default":"Information","Microsoft.AspNetCore":"Warning" } },"AllowedHosts":"*","Kestrel": {"EndpointDefaults": {"Protocols":"Http2" } },"Consul": { "consulAddress": "http://127.0.0.1:8500", "serviceName": "api_gRPC", "currentIp": "127.0.0.1", "currentPort": "5246" } }
然后新建ConsulRegister.cs封装注册到Consul的类
///<summary>/// Consul注册///</summary>publicstaticclass ConsulRegister {//服务注册publicstatic IApplicationBuilder UseConsul(this IApplicationBuilder app, IConfiguration configuration) {// 获取主机生命周期管理接口var lifetime = app.ApplicationServices.GetRequiredService<IHostApplicationLifetime>(); ConsulClient client=new ConsulClient(c => { c.Address=new Uri(configuration["Consul:consulAddress"]); c.Datacenter="dc1"; });string ip = configuration["ip"];//优先接收变量的值string port = configuration["port"];//优先接收变量的值string currentIp = configuration["Consul:currentIP"];string currentPort = configuration["Consul:currentPort"]; ip=string.IsNullOrEmpty(ip) ? currentIp : ip;//当前程序的IP port =string.IsNullOrEmpty(port) ? currentPort : port;//当前程序的端口string serviceId = $"service:{ip}:{port}";//服务ID,一个服务是唯一的//服务注册 client.Agent.ServiceRegister(new AgentServiceRegistration() { ID= serviceId,//唯一的 Name = configuration["Consul:serviceName"],//组名称-Group Address = ip,//ip地址 Port =int.Parse(port),//端口 Tags =newstring[] {"api站点" }, Check=new AgentServiceCheck() { Interval= TimeSpan.FromSeconds(10),//多久检查一次心跳 GRPC = $"{ip}:{port}",//gRPC注册特有 GRPCUseTLS=false,//支持http Timeout = TimeSpan.FromSeconds(5),//超时时间 DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(5)//服务停止多久后注销服务 } }).Wait();//应用程序终止时,注销服务 lifetime.ApplicationStopping.Register(() => { client.Agent.ServiceDeregister(serviceId).Wait(); });return app; } }
Program.cs增加使用这个扩展类
using GrpcDemo.Service.Services;using GrpcDemo.Service.Utils;var builder = WebApplication.CreateBuilder(args);// Additional configuration is required to successfully run gRPC on macOS.// For instructions on how to configure Kestrel and gRPC clients on macOS, visithttps://go.microsoft.com/fwlink/?linkid=2099682// Add services to the container.builder.Services.AddGrpc();var app = builder.Build(); IConfiguration _configuration= builder.Configuration;// Configure the HTTP request pipeline. app.MapGrpcService<GreeterService>(); app.MapGrpcService<OrderService>(); app.MapGrpcService<HealthCheckService>(); app.MapGet("/", () =>"Communication with gRPC endpoints must be made through a gRPC client. To learn how to create a client, visit: https://go.microsoft.com/fwlink/?linkid=2086909");app.UseConsul(_configuration); app.Run();
1.新建健康检查proto文件HealthCheck.proto
syntax ="proto3"; package grpc.health.v1; message HealthCheckRequest {string service =1; } message HealthCheckResponse {enum ServingStatus { UNKNOWN=0; SERVING=1; NOT_SERVING=2; } ServingStatus status=1; } service Health { rpc Check(HealthCheckRequest) returns (HealthCheckResponse); rpc Watch(HealthCheckRequest) returns (stream HealthCheckResponse); }
2.新建健康检查服务实现上面proto协议HealthCheckService.cs
publicclass HealthCheckService : Health.HealthBase {publicoverride Task<HealthCheckResponse> Check(HealthCheckRequest request, ServerCallContext context) { Console.WriteLine($"This is {nameof(HealthCheckService)} Check");//TODO:检查逻辑return Task.FromResult(new HealthCheckResponse() { Status = HealthCheckResponse.Types.ServingStatus.Serving }); }publicoverrideasync Task Watch(HealthCheckRequest request, IServerStreamWriter<HealthCheckResponse> responseStream, ServerCallContext context) {//TODO:检查逻辑await responseStream.WriteAsync(new HealthCheckResponse() { Status= HealthCheckResponse.Types.ServingStatus.Serving }); } }
3.在Program.cs中把服务注册到gRPC管道
using GrpcDemo.Service.Services;using GrpcDemo.Service.Utils;var builder = WebApplication.CreateBuilder(args);// Additional configuration is required to successfully run gRPC on macOS.// For instructions on how to configure Kestrel and gRPC clients on macOS, visithttps://go.microsoft.com/fwlink/?linkid=2099682// Add services to the container.builder.Services.AddGrpc();//配置获取var app = builder.Build(); IConfiguration _configuration= builder.Configuration;// Configure the HTTP request pipeline. app.MapGrpcService<GreeterService>(); app.MapGrpcService<OrderService>();app.MapGrpcService<HealthCheckService>(); app.MapGet("/", () =>"Communication with gRPC endpoints must be made through a gRPC client. To learn how to create a client, visit: https://go.microsoft.com/fwlink/?linkid=2086909"); app.UseConsul(_configuration); app.Run();
到这里服务注册就完成了,服务发现和上面简介的链接文章中一模一样,启动项目查看效果。