Can't connect to GRPC server which is deployed on AWS ECS - amazon-web-services

Question

I have a GRPC server written on C#.
internal class Program
{
internal static void Main(string[] args)
{
using (var waitHandle = new AutoResetEvent(false))
{
void OnConsoleOnCancelKeyPress(object o, ConsoleCancelEventArgs e)
{
e.Cancel = true;
// ReSharper disable once AccessToDisposedClosure
waitHandle.Set();
}
Console.CancelKeyPress += OnConsoleOnCancelKeyPress;
var config = new AppConfig(new ConfigurationBuilder()
.AddJsonFile("appsettings.json", false)
.Build());
var containerBuilder = new ContainerBuilder();
containerBuilder.RegisterModule(new Module());
containerBuilder.RegisterModule(new Data.Module(config.Region, config.TablePrefix));
using (var container = containerBuilder.Build())
{
var buyRatesService = container.Resolve<BuyRatesService>();
var logger = container.Resolve<ILogger<Program>>();
var server = new Server
{
Services =
{
BuyRates.BindService(buyRatesService)
},
Ports = {new ServerPort("0.0.0.0", 50051, ServerCredentials.Insecure)}
};
try
{
server.Start();
logger.LogDebug("Service started");
waitHandle.WaitOne();
}
catch (Exception e)
{
logger.LogCritical("Application terminated unexpectedly. Exception {#exception}", e);
}
finally
{
server.ShutdownAsync().Wait();
Console.CancelKeyPress -= OnConsoleOnCancelKeyPress;
}
}
}
}
}
It works fine locally. I deploy it to ecs instance(Docker). The container port is 50051. ALB and Route 53 are used.
When I'm trying to connect to someroute54uri.net:50051 I get an error
Grpc.Core.RpcException: Status(StatusCode=Unavailable, Detail="Connect Failed").
In case when I'm trying to connect to someroute54uri.net, I get an error
Grpc.Core.RpcException: Status(StatusCode=Unavailable, Detail="Trying to connect an http1.x server").
Thanks!.
Please, let me know if additional information helps to solve the issue.