简介
api网关是提供给外部调用的统一入口,类似于dns,所有的请求统一先到api网关,由api网关进行指定内网链接。
ocelot是基于netcore开发的开源API网关项目,功能强大,使用方便,它包含了负载均衡、路由、请求聚合、服务发现、权限认证等功能。
基础准备
开发环境:vs2017
netcore:2.1
新建项目
netcore安装ocelot
- install-package Ocelot 安装ocelot组件
配置ocelot
1.添加ocelotSettings.json文件,并且在program.cs文件当中添加配置信息
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using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Threading.Tasks; using Microsoft.AspNetCore; using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.Logging; namespace ocelotTest { public class Program { public static void Main(string[] args) { BuildWebHost(args).Run(); } public static IWebHost BuildWebHost(string[] args) => WebHost.CreateDefaultBuilder(args) .UseStartup<Startup>() .UseUrls("http://localhost:8683") .ConfigureAppConfiguration(conf => { conf.AddJsonFile("OcelotSettings.json", optional: false, reloadOnChange: true); }) .Build(); } }
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2.注入ocelot服务
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using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Hosting; using Microsoft.AspNetCore.Mvc; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Logging; using Microsoft.Extensions.Options; using Ocelot.DependencyInjection; using Ocelot.Middleware; using Ocelot.Provider.Consul; using Ocelot.Provider.Polly; namespace ocelotTest { public class Startup { public Startup(IConfiguration configuration) { 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) { //注入ocelot服务 services.AddOcelot(Configuration).AddConsul().AddPolly(); } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } app.UseOcelot().Wait(); } } }
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3.配置ocelotSettings.json
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{ "ReRoutes": [ { //下游路由模板,真实请求的路径 "DownstreamPathTemplate": "/api/{everything}", //请求的方式,例如:http,https "DownstreamScheme": "http", //服务器名称 "ServiceName": "zyz", //启用consul服务 "UseServiceDiscovery": true, //服务熔断 "QoSOptions": { "ExceptionsAllowedBeforeBreaking": 3, //允许多少次异常请求 "DurationOfBreak": 5, //熔断时间,单位为秒 "TimeoutValue": 5000 //如果下游请求的处理时间超过多少则自动设置超时 }, "HttpHandlerOptions": { "AllowAutoRedirect": false, "UseCookieContainer": false, "UseTracing": false }, "ReRouteIsCaseSensitive": false, //负载均衡: //RoundRobin轮流发送; //LeastConnection – 将请求发往最空闲的那个服务器 //NoLoadBalance – 总是发往第一个请求或者是服务发现 "LoadBalancerOptions": { "Type": "RoundRobin" }, //上游地址配置 "UpstreamPathTemplate": "/test/{everything}", //上游支持的请求类型 "UpstreamHttpMethod": [ "Post", "Get" ] } ], "GlobalConfiguration": { "BaseUrl": "https://localhost:8683", //consul服务器地址和ip "ServiceDiscoveryProvider": { "Host": "localhost", "Port": 8500 } } }
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4.启动ocelot项目和consul服务。
把服务注册到consul当中,通过postman发送请求测试,成功转发消息,并且实现负载均衡。
小结:简单的ocelot搭建完成,后续的一些扩展功能慢慢在研究。
标签:网关,netcore,consul,System,public,ocelot,using,Microsoft From: https://www.cnblogs.com/weihengblogs/p/17030489.html