Docker port mapping on AWS Elastic Beanstalk

Question

I have a Docker container specified through Dockerfile which has to be run with the -p flag in order to function properly. On my local machine, after running

docker run -d -p 5000:5000 blagtagger:v0.4.3

the port mapping is shown as 0.0.0.0:5000->5000/tcp and everything works smoothly.

Now, I need to deploy it on AWS Elastic Beanstalk, so I prepared my Dockerrun.aws.json file as follows:

{
  "AWSEBDockerrunVersion": "1",
  "Ports": [
    {
      "ContainerPort": 5000,
      "HostPort": 5000
    }
  ]
}

However, the container port does not seem to map to the host port correctly. The port mapping is shown as 5000/tcp.

How can I ask Beanstalk to set the mapping to 0.0.0.0:5000->5000/tcp?

Answer 1

It turns out there is no elegant way to accomplish this. Along the lines of the answers here and here, I added the following in a file named .ebextensions/01-commands.config:

commands:
    00001_add_port_mapping:
        cwd: /tmp
        command: 'sed -i "s/docker run -d/docker run -p 5000:5000 -d/" /opt/elasticbeanstalk/hooks/appdeploy/enact/00run.sh'

and discarded the Dockerrun.aws.json file.