Yarp 反向代理 - 响应 502 错误网关

Posted 2023-04-12

【中文标题】Yarp 反向代理 - 响应 502 错误网关

【英文标题】：Yarp Reverse Proxy - Response 502 Bad Gateway

【发布时间】：2021-11-01 06:20:20

【问题描述】：

我想使用 Yarp 实现反向代理。 Api 已启动并正在运行，因为我可以向它发送请求。但是，每当我通过代理尝试相同的请求时，我都会收到错误 502 Bad gateway

Startup.cs

public void ConfigureServices(IServiceCollection services)

    services.AddReverseProxy()
     .LoadFromConfig(Configuration.GetSection("ReverseProxy"));


public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

    if (env.IsDevelopment())
    
        app.UseDeveloperExceptionPage();
    
    app.UseRouting();
    // Register the reverse proxy routes
    app.UseEndpoints(endpoints =>
    
        endpoints.MapReverseProxy();
    );

应用设置

"ReverseProxy": 
    "Routes": 
      "route1": 
        "ClusterId": "cluster1",
        "Match": 
          //"Methods": [ "GET", "POST", "PUT", "HEAD", "OPTIONS", "DELETE" ],
          "Path": "**catch-all"
        
      
    ,
    "Clusters": 
      "cluster1": 
        "Destinations": 
          "cluster1/destination1": 
            "Address": "https://localhost:44339/"
          
        
      
    
  

每当我通过代理发送请求时，我都会收到响应 502 bad gateway

【参考方案1】：

您应该点击output并选择ProjectName-Asp.Net Core Web Server查看详细信息。

我使用您的代码并附加了另一个设置，并检查了日志，我发现原因是 http://localhost:44339 没有启动。它应该在本地使用另一个 webapp 的端口。

  "Logging": 
    "LogLevel": 
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    
  ,
  //"AllowedHosts": "*"

  "ReverseProxy": 
    "Routes": [
      
        "ClusterId": "cluster1",
        "Match": 
          //"Methods": [ "GET", "POST", "PUT", "HEAD", "OPTIONS", "DELETE" ],
          "Path": "**catch-all"
        
      ,
      
        // matches /something/* and routes to 2 external addresses
        "ClusterId": "cluster2",
        "Match": 
          "Path": "/something/*any"
        
      
    ],
  "Clusters": 
      "cluster1": 
        "Destinations": 
          "cluster1/destination1": 
            "Address": "http://localhost:44339/"
          
        
      ,
      "cluster2": 
        "Destinations": 
          "first_destination": 
            "Address": "https://baidu.com"
          ,
          "another_destination": 
            "Address": "https://bing.com"
          
        ,
        "LoadBalancingPolicy": "PowerOfTwoChoices"
      

    
  

测试结果

默认：https://localhost:44370

https://localhost:44370/somthing

它将重定向到 bing 站点。