.net 6配置api网关ocelot
1、新建webapi项目
2、添加依赖
install-package ocelot
install-package ocelot.provider.consul3、添加配置（配合Consul，安装Consul可参考《.Net6 Furion框架配置Consul》）
ocelot.json
{
"Routes": [
{
"UpstreamPathTemplate": "/user/{url}",
"UpstreamHttpMethod": [ "Get", "Post", "Put" ],
"UseServiceDiscovery": true, //启用通过服务发现
"ServiceName": "User", //Consul对应的Service Name
"DownstreamPathTemplate": "/{url}",
"DownstreamScheme": "http",
//"DownstreamHostAndPorts": [
// { //如果关闭通过服务发现则需要配置此处
// "Host": "localhost",
// "Port": 5001
// }
//],
"LoadBalancerOptions": {
"Type": "RoundRobin" //负载均衡方式
}
//缓存
//"FileCacheOptions": {
// "TtlSeconds": 30, //缓存时间（秒）
// "Region": "CacheArea" //缓存区（名称自定义），表示改配置缓存放到哪个区域，可以在配置管理中进行维护
//}
}
],
"GlobalConfiguration": {
"ServiceDiscoveryProvider": {
"Host": "127.0.0.1", //Consul客户端的IP
"Port": 8500,
"Type": "Consul" //PollConsul
},
"BaseUrl": "https://api.yourname.com", //对外的网关网址
"RateLimitOptions": {
"QuotaExceededMessage": "Too many requests, maybe later? ", // 当请求过载被截断时返回的消息
"HttpStatusCode": 666, // 当请求过载被截断时返回的http status
"ClientIdHeader": "client_id" // 用来识别客户端的请求头，默认是 ClientId
}
}
}4、Startup.cs配置
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)
{
services.AddControllers();
services.AddOcelot(new ConfigurationBuilder().AddJsonFile("ocelot.json").Build())
.AddConsul();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseOcelot().Wait();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}注意：
services.AddOcelot().AddConsul() 如果缺少紫色部分（需要安装对应的Provider，例如Ocelot.Provider.Consul），配置又启用了服务发现，就会出现如下错误：
Exception: Unable to start Ocelot, errors are: Unable to start Ocelot, errors are: Unable to start Ocelot because either a ReRoute or GlobalConfiguration are using ServiceDiscoveryOptions but no ServiceDiscoveryFinderDelegate has been registered in dependency injection container. Are you missing a package like Ocelot.Provider.Consul and services.AddConsul() or Ocelot.Provider.Eureka and services.AddEureka()?,Unable to start Ocelot, errors are: Unable to start Ocelot because either a ReRoute or GlobalConfiguration are using ServiceDiscoveryOptions but no ServiceDiscoveryFinderDelegate has been registered in dependency injection container. Are you missing a package like Ocelot.Provider.Consul and services.AddConsul() or Ocelot.Provider.Eureka and services.AddEureka()?