Access AWS ElasticBeanstalk Custom Environment Variables with .NET Core WebApp

Question

We have set custom environment variables in the Elastic Beanstalk dashboard, under configuration=>software configuration=>\"Environment Properties\" section. In a C# MVC 5 proje

Answer 1

Based on my research and testing, this is a deficiency in AWS Elastic Beanstalk for ASP.NET Core 1.1 applications. Just ran into this issue today and the only way to solve it is to load the config that AWS writes (if it's there) using the ASP.NET ConfigurationBuilder and parse it.

AWS should eventually fix this, until then you can use the method I'm using:

    public Startup(IHostingEnvironment env)
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(env.ContentRootPath)
            .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
            .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
            .AddJsonFile(@"C:\Program Files\Amazon\ElasticBeanstalk\config\containerconfiguration", optional: true, reloadOnChange: true)
            .AddEnvironmentVariables();

        var config = builder.Build();

        builder.AddInMemoryCollection(ParseEbConfig(config));

        Configuration = builder.Build();
    }

    private static Dictionary ParseEbConfig(IConfiguration config)
    {
        Dictionary dict = new Dictionary();

        foreach (IConfigurationSection pair in config.GetSection("iis:env").GetChildren())
        {
            string[] keypair = pair.Value.Split(new[] { '=' }, 2);
            dict.Add(keypair[0], keypair[1]);
        }

        return dict;
    }