I am running a rails app in a docker container and after executing docker-compose up
I look in the browser and see ERR_CONNECTION_REFUSED
. I have tried port forwarding via docker run -p 3000:3000 docker_app
and still nothing. Any ideas?
If you are using boot2docker or docker toolbox or docker machine (on an OS different from Linux, meaning using a VirtualBox VM), that means you need to forward that port at the VM level itself:
VBoxManage controlvm boot2docker-vm natpf1 "name,tcp,,3000,,3000"
The VM needs to forward that port from localhost to itself, before the docker port mapping can act.
I had a similar case with this answer .
Then try to access http://$(docker-machine ip default):3000
, as mainframer comments.
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