CODEWITHSUNDEEP
azuredockerport
johnslippers
johnslippers

Reputation: 101

Ports On Docker

Is there a way to bind ports to containers without passing an argument via the run command? I do not like starting my containers with the 'docker run' command so using the -p argument is not an option for me. I like to start my containers with the 'docker start containername' command. I would like to specify the hostname of the docker-server with the port number (http://dockerserver:8081) and this should then be forwarded to my container's app which is listening on port 8081. My setup is on Azure but is pretty basic so the Azure docker plugin looks a bit like overkill. I read up about the expose command but seems like you still need to use the 'docker run -p' command to get access to the container from the outside. Any suggestions would be very much appreciated.

Upvotes: 1

Views: 443

Answers (1)

Elton Stoneman
Elton Stoneman

Reputation: 19154

docker run is just a shortcut for docker create + docker start. Ports need to be exposed when a container is created, so the -p option is available in docker create:

docker create -d -p 80:80 --name web nginx:alpine
docker start web

Port publishing only does ports though.

If you want the hostname passed to the container, you'll need to do it with a command option or (more likely) an environment variable - defined with ENV in the Dockerfile and passed with -e in docker create.

Upvotes: 2

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