Rabbitmq - Docker connection refused on port 5672

I have a web server written in Go that interacts with Rabbitmq and Mongodb. When I run all these servers on my machine without containers (rabbitmq url: amqp://guest:guest@localhost:5672) it works fine.

Now I am trying to run all these services in a separate container. Here is my compose file

version: '3'
services:
  rabbitmq:
    image: rabbitmq
    container_name: rabbitmq
    ports:
      - 5672:5672
  mongodb:
    image: mongo
    container_name: mongodb
    ports:
      - 27017:27017
  web:
    build: .
    image: palash2504/collect
    container_name: collect-server
    restart: on-failure
    ports:
      - 3000:3000
    depends_on:
      - rabbitmq
      - mongodb
    links: ["rabbitmq", "mongodb"]

networks:
  default:
    external:
      name: collect-net

This is my servers dockerfile

FROM golang

ENV GO111MODULE=on


WORKDIR /app

COPY go.mod .
COPY go.sum .

RUN go mod download

COPY . .

RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build

EXPOSE 3000


ENTRYPOINT ["/app/social-cops-assignment"]

My server can't seem to connect to rabbitmq. This is the log message I get when running docker compose up and the rabbitmq url in my config being amqp://guest:guest@rabbitmq:5672 (since the container name is rabbitmq I replace localhost with rabbitmq so that my server is able to find the rabbitmq container)

collect-server | 2019/03/10 08:50:51 Failed to connect to AMQP compatible broker at: amqp://guest:guest@rabbitmq:5672/, with errror: dial tcp 172.24.0.3:5672: connect: connection refused

But rabbitmq seems to be ready to accept connections. These are the last two lines of the rabbitmq logs from docker-compose up

rabbitmq    | 2019-03-10 08:50:55.164 [info] <0.489.0> accepting AMQP connection <0.489.0> (172.24.0.4:49784 -> 172.24.0.3:5672)
rabbitmq    | 2019-03-10 08:50:55.205 [info] <0.489.0> connection <0.489.0> (172.24.0.4:49784 -> 172.24.0.3:5672): user 'guest' authenticated and granted access to vhost '/'

I am new to docker-networking and I don't know what am I doing wrong? Is it the rabbitmq address that I am using or I need some additional configuration with respect to rabbitmq or expose some ports?

When targeting services, dont append a port. Use rabbitmq, not rabbitmq:5672.

I already answered this in your question here: How to connect to rabbitmq container from the application server container

All the docker network configuration (after the described fix above) seems to be fine. The remaining error is likely due to authentication issues related to your source code and/or authentication data/setup.