使用Consul 实现 MagicOnion(GRpc) 服务注册和发现
1.下载打开Consul
笔者是windows下面开发的(也可以使用Docker)。
官网下载windows的Consul
使用cmd窗口打开,输入consul agent -dev
访问默认127.0.0.1:8500就可以看到界面化的Consul
2.在服务端注册
接着上一篇
using Consul;
using Grpc.Core;
using GRPCServer.Entity;
using MagicOnion.Server;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System;
namespace GRPCServer
{
public class Startup
{
public Startup(IConfiguration configuration)
{
this.Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
MagicOnionServiceDefinition service = MagicOnionEngine.BuildServerServiceDefinition(new MagicOnionOptions(true)
{
MagicOnionLogger = new MagicOnionLogToGrpcLogger()
});
Server server = new Server
{
Services = { service },
Ports = { new ServerPort(this.Configuration["Service:LocalIPAddress"], Convert.ToInt32(this.Configuration["Service:Port"]), ServerCredentials.Insecure) }
};
server.Start();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, IApplicationLifetime lifetime)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseMvc();
ServiceEntity serviceEntity = new ServiceEntity
{
IP = this.Configuration["Service:LocalIPAddress"],
Port = Convert.ToInt32(this.Configuration["Service:Port"]),
ServiceName = this.Configuration["Service:Name"],
ConsulIP = this.Configuration["Consul:IP"],
ConsulPort = Convert.ToInt32(this.Configuration["Consul:Port"])
};
var consulClient = new ConsulClient(x => x.Address = new Uri($"http://{serviceEntity.ConsulIP}:{serviceEntity.ConsulPort}"));//请求注册的 Consul 地址
var httpCheck = new AgentServiceCheck()
{
DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(5),//服务启动多久后注册
Interval = TimeSpan.FromSeconds(10),//健康检查时间间隔,或者称为心跳间隔
HTTP = this.Configuration["Service:Examination"],//健康检查地址
Timeout = TimeSpan.FromSeconds(5)
};
var registration = new AgentServiceRegistration()
{
Checks = new[] { httpCheck },
ID = Guid.NewGuid().ToString(),
Name = serviceEntity.ServiceName,
Address = serviceEntity.IP,
Port = serviceEntity.Port,
Tags = new[] { $"urlprefix-/{serviceEntity.ServiceName}" }//添加 urlprefix-/servicename 格式的 tag 标签,以便 Fabio 识别
};
consulClient.Agent.ServiceRegister(registration).Wait();//服务启动时注册,内部实现其实就是使用 Consul API 进行注册(HttpClient发起)
lifetime.ApplicationStopping.Register(() =>
{
consulClient.Agent.ServiceDeregister(registration.ID).Wait();//服务停止时取消注册
});
}
}
}
appsettings.json
{
"Service": {
"Name": "Test3",
"Port": "8083",
"LocalIPAddress": "192.168.1.8",
"Examination": "http://192.168.1.8:5000/api/Values"
},
"Consul": {
"IP": "127.0.0.1",
"Port": "8500"
}
}
3.客户端调用
using Consul;
using Grpc.Core;
using MagicOnion.Client;
using ServerDefinition;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
var aaa= AvaliableServices("Test3","").Result;
public static async Task<ServiceEntry[]> AvaliableServices(string name, string tags)
{
var services = new List<ServiceEntry>();
using (var client = new ConsulClient())
{
foreach (var tag in tags.Split(','))
{
var result = await client.Health.Service(name, !string.IsNullOrEmpty(tag) ? tag : null, true).ConfigureAwait(false);
foreach (var item in result.Response)
{
if (!services.Any(service => service.Node.Address == item.Node.Address
&& service.Service.Port == item.Service.Port))
{
services.Add(item);
}
}
}
//交集处理,仅取出完全匹配服务
foreach (var tag in tags.Split(','))
{
if (string.IsNullOrEmpty(tag))
{
continue;
}
var alsorans = services.Where(service => !service.Service.Tags.Contains(tag)).ToList();
foreach (var alsoran in alsorans)
{
services.Remove(alsoran);
}
}
}
return services.ToArray();
}
4.思考
这个时候我就能通过'Test3'来获得Test3的服务和接口。
但是我是使用的MagicOnion,还是没办法拿到我定义的方法SumAsync
怎么办?
1.引用ITest (让微服务之间有引用,不太好)
2.使用网关
5.预告
下一篇我会想法办法使他们能相互通讯(其实我还不知道怎么搞)