SwaggerEndPoints configuration section is missing or empty for merged ocelot jsons

Hi,

When I’m using per service ocelot.json configuration and file merging, I get System.InvalidOperationException: “SwaggerEndPoints configuration section is missing or empty.” Approach is described here: https://ocelot.readthedocs.io/en/latest/features/configuration.html#merging-configuration-files

When I put whole configuration in standalone ocelot.json, everything works fine.

I would like to use both configurations merging and swagger on api gateway.

My configuration below:

Startup.cs

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddOcelot();
            services.AddSwaggerForOcelot(Configuration);
            ...
        }

        public async void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
          ...
            app.UseStaticFiles();

            await app.UseSwaggerForOcelotUI(Configuration, opt =>
            {
                opt.PathToSwaggerGenerator = "/swagger/docs";

            }).UseOcelot();
           ...
        }

Program.cs

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.ConfigureAppConfiguration((hostingContext, config) =>
                    {
                        config
                            .AddOcelot("./Ocelot", hostingContext.HostingEnvironment)
                            .AddEnvironmentVariables();
                    });
                    webBuilder.UseStartup<Startup>();
                });

ocelot.service1.json

{
  "ReRoutes": [
    {
      "SwaggerKey": "service1",
      "UpstreamPathTemplate": "/service1/{everything}",
      "UpstreamHttpMethod": [ "GET", "PUT" ],
      "DownstreamPathTemplate": "/service1/{everything}",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 5010
        }
      ]
    }
  ]
}

ocelot.global.json

{
  "SwaggerEndPoints": [
    {
      "Key": "service1",
      "Config": [
        {
          "Name": "Service1 API V1",
          "Version": "v1",
          "Url": "http://localhost:5010/swagger/v1/swagger.json"
        }
      ]
    }
  ],
  "GlobalConfiguration": {
    "BaseUrl": "http://localhost:5014"
  }
}

[Burgyn]

Hi,

when you use .AddOcelot("./Ocelot", hostingContext.HostingEnvironment) extension, then Ocelot merge configuration by own way and remove unknown elements.

As workaround you can move SwaggerEndPoints section into your appsettings.json file. I hope, that help you.

[habtu12]

You can config teh Program.cs to read ocelot.json or ocelot.dev.json like this: