Docker images & port mapping.

[mcbridet]

I have some docker images that publish web services on ports that are not 80/443. Using docker run, I can translate the non-standard port (8000, 8080 etc.) to 80 using the -p flag, such as docker run -p 127.0.0.1:80:8080 ...

https://docs.docker.com/engine/reference/commandline/run/#publish-or-expose-port-p-expose

Is there any way I can specify this sort of mapping in a config.json file?

Many thanks!

[titanous]

Sure, you can do something like this:

{
  "processes": {
    "app": {
      "ports": [
        {
          "proto": "tcp",
          "port": 8000,
          "service": {
            "name": "myapp-web",
            "create": true
          }
        }
      ]
    }
  }
}

Which would create a service that you can then create a HTTP or TCP route for:

flynn route add http -s myapp-web myapp.com
flynn route add tcp -s myapp-web

[mcbridet]

Thanks mate, much appreciated.

[Tyler-Murphy]

How would you recommend doing this with flynn docker push?

[titanous]

@Tyler-Murphy you can use flynn release show --json and flynn release update to set this up after the first push.

[Tyler-Murphy]

That works great. Thanks!

[SalvoLunar]

Hi,
Can you please clarify how this works? I have a docker image with wordpress
Wordpress by default listens to port 80, should I map this to port 8080?

Thanks,
Salvo

[ruiisidro]

I'm also struggling to get any docker image up and running on flynn. I'm always getting the "Service Unavailable" message. running docker image locally with -p parameter works fine, but when deploying to my flynn server it never works.