Eureka ServiceDiscovery with a peered environment

[vuchl]

Expected Behavior / New Feature

Ocelot being able to connect to a peered environment of multiple Eureka instances

Actual Behavior / Motivation for New Feature

Ocelot not able to connect and fail over between instances of Eureka

Steps to Reproduce the Problem

1. run multiple instances of Eureka in a peered mode, e.g. peer 1: docker run --publish 8761:8761 -d steeltoeoss/eureka-server eureka.instance.name=peer1 --eureka.instance.preferIpAddress=true --eureka.client.serviceUrl.defaultZone=http://10.0.0.1:8761/eureka/,http://10.0.0.2:8761/eureka/ peer 2: docker run --publish 8761:8761 -d steeltoeoss/eureka-server eureka.instance.name=peer2 --eureka.instance.preferIpAddress=true --eureka.client.serviceUrl.defaultZone=http://10.0.0.1:8761/eureka/,http://10.0.0.2:8761/eureka/
2. confirm that the service discovery runs as a replication by looking at the Eureka dashboar at http://10.0.0.1:8761 and http://10.0.0.2:8761

3. setup Ocelot in the AspNetCore application as per the docs

   public class Program
   {
       public static void Main(string[] args)
       {
           BuildWebHost(args).Run();
       }
   
       public static IWebHost BuildWebHost(string[] args)
       {
           return WebHost.CreateDefaultBuilder(args)
               .UseUrls("http://localhost:8099")
               .ConfigureAppConfiguration((hostingContext, config) =>
               {
                   config
                       .SetBasePath(hostingContext.HostingEnvironment.ContentRootPath)
                       .AddJsonFile("appsettings.json", true, true)
                       .AddJsonFile($"appsettings.{hostingContext.HostingEnvironment.EnvironmentName}.json", true,
                           true)
                       .AddJsonFile("ocelot.json", false, false)
                       .AddEnvironmentVariables();
               })
               .ConfigureServices(s =>
               {
                   s.AddCors();
                   s
                       .AddOcelot()
                       .AddEureka()
                       // .AddCacheManager(x => x.WithDictionaryHandle())
                       ;
                   s.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
               })
               .Configure(a =>
               {
                   a.UseOcelot().Wait();
   
                   a.UseCors(b => b
                     .AllowAnyOrigin()
                     .AllowAnyMethod()
                     .AllowAnyHeader()
                     .AllowCredentials()
                   );
               })
               .Build();
       }
   }

ocelot.json

{
  "GlobalConfiguration": {
    "RequestIdKey": "OcRequestId",
    "AdministrationPath": "/administration",
    "UseServiceDiscovery" : true,
    "ServiceDiscoveryProvider": { "Type": "Eureka"}
  },
  "ReRoutes": [ ... ]
}

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*",
  "spring": {
    "application": {
      "name": "API-Gateway"
    }
  },
  "eureka": {
    "client": {
      "serviceUrl": "http://10.0.0.1:8761/eureka/,http:10.0.0.2:8761/eureka",
      "shouldRegisterWithEureka": false,
      "validateCertificates": false,
      "shouldFetchRegistry":  true
    }
  }
}

4. How do I setup the code to have a resilliant setup?

Specifications

• Version: 13.0.0
• Platform: AspNet Core 2.2 on Windows
• Subsystem:

[raman-m]

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