getting error while using docker with .net and rabbitMQ

[Gourav636]

Hi, I created a small application using .netcore and rabbitmq and created the image in docker for both of them using below docker-compose code -

version: '3'
services:
rabbitmq:
container_name: rabbitmq
hostname: "rabbitmq"
image: rabbitmq:3-management
ports:

• "5672:5672"
• "15672:15672"
  volumes:
• rabbitmq:/rabbitmq
  healthcheck:
  test: ["CMD", "curl", "-f", "http://localhost:15672"]
  interval: 30s
  timeout: 10s
  retries: 5

isp_hub:
depends_on:

• rabbitmq
  build:
  context: .
  dockerfile: Dockerfile
  ports:
• "9090:80"

volumes:
rabbitmq:

after running the cmd docker-compose up the image is created and container is started and i am using Jmeter client to hit the container .net code is working but while trying to pass the data in queue getting below exception -

"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:22.6109672Z"}
{"log":" Application is shutting down...\r\n","stream":"stdout","time":"2022-04-04T08:25:22.6109672Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4488984Z"}
{"log":" Now listening on: http://[::]:80\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4488984Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":" Application started. Press Ctrl+C to shut down.\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":" Hosting environment: Production\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":" Content root path: C:\app\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":"fail: Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher[8]\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" Failed to invoke hub method 'SendToMessageBroker'.\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" RabbitMQ.Client.Exceptions.BrokerUnreachableException: None of the specified endpoints were reachable\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" ---\u003e System.AggregateException: One or more errors occurred. (Connection failed)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" ---\u003e RabbitMQ.Client.Exceptions.ConnectFailureException: Connection failed\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" ---\u003e System.Net.Sockets.SocketException (10061): No connection could be made because the target machine actively refused it.\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at System.Threading.Tasks.ValueTask.ValueTaskSourceAsTask.\u003c\u003ec.\u003c.cctor\u003eb__4_0(Object state)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" --- End of stack trace from previous location ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.TcpClientAdapter.ConnectAsync(String host, Int32 port)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.TaskExtensions.TimeoutAfter(Task task, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectOrFail(ITcpClient socket, AmqpTcpEndpoint endpoint, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" --- End of inner exception stack trace ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectOrFail(ITcpClient socket, AmqpTcpEndpoint endpoint, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectUsingAddressFamily(AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan timeout, AddressFamily family)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectUsingIPv4(AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler..ctor(AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan connectionTimeout, TimeSpan readTimeout, TimeSpan writeTimeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at RabbitMQ.Client.Framing.Impl.IProtocolExtensions.CreateFrameHandler(IProtocol protocol, AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan connectionTimeout, TimeSpan readTimeout, TimeSpan writeTimeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateFrameHandler(AmqpTcpEndpoint endpoint)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.EndpointResolverExtensions.SelectOne[T](IEndpointResolver resolver, Func2 selector)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" --- End of inner exception stack trace ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at RabbitMQ.Client.EndpointResolverExtensions.SelectOne[T](IEndpointResolver resolver, Func2 selector)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Framing.Impl.AutorecoveringConnection.Init(IEndpointResolver endpoints)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection(IEndpointResolver endpointResolver, String clientProvidedName)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" --- End of inner exception stack trace ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection(IEndpointResolver endpointResolver, String clientProvidedName)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection(String clientProvidedName)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection()\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at ISP_Hub.HubConfig.CenterHub.SendToMessageBroker(String requestData) in C:\src\ISP_Hub\HubConfig\CenterHub.cs:line 38\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at Microsoft.Extensions.Internal.ObjectMethodExecutor.\u003c\u003ec__DisplayClass33_0.\u003cWrapVoidMethod\u003eb__0(Object target, Object[] parameters)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher1.ExecuteMethod(ObjectMethodExecutor methodExecutor, Hub hub, Object[] arguments)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher1.\u003c\u003ec__DisplayClass16_0.\u003c\u003cInvoke\u003eg__ExecuteInvocation|0\u003ed.MoveNext()\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}

rabbitmq connection code -

public void SendToMessageBroker(string requestData)
{
var trace = JsonConvert.DeserializeObject(requestData);
// string rabbitMqUrl = "127.0.0.1";
// var factory = new ConnectionFactory() { HostName = "172.24.17.225", Port = 5672 };
//var factory = new ConnectionFactory
//{
// HostName = rabbitMqUrl,
// UserName = "guest",
// Password = "guest",
// Port = AmqpTcpEndpoint.UseDefaultPort,
// VirtualHost = "/",
// RequestedHeartbeat = new TimeSpan(60),
// Ssl = { ServerName = rabbitMqUrl, Enabled = false }
//};
var factory = new RabbitMQ.Client.ConnectionFactory
{
Uri = new Uri("amqp://guest:guest@localhost:5672/")
};
using var conn = factory.CreateConnection();
using var channel = conn.CreateModel();
RabbitMQPublisher.Publish(channel, trace);
Clients.All.SendAsync("test");
channel.Close();
conn.Close();
Debug.WriteLine("Show Message: " + requestData);

}

i am new to docker . please help me to understand the issue and how to resolve it

[kamilsoloducha]

If you run both, rabbit and your service, as a docker container, then you can talk between them by docker container name, in you case sth like this:

var factory = new ConnectionFactory { HostName = "rabbitmq", UserName = "guest", Password = "guest", Port = 5672 };

If you run your app without container, I mean locally, in debug as well, then you can use localhost as long as you publish communiction port in rabbit container.

var factory = new ConnectionFactory { HostName = "localhost", UserName = "guest", Password = "guest", Port = 5672 };

Generally that is a basic knowlege of networking in docker, so most of tutorials should explain you that in details.

I know, guys mention sth about that in theirs stuff on YT. You can take a look here: /watch?v=UWfn8Iml2Kc about 30min. There is a little bit different context.

Cheers