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?
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mainframer
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Jackson
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What URL do you try and access in the browser ? – Sachin Malhotra Oct 18 '15 at 05:31
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What's system are you running docker? if you are using Mac, it is not '127.0.0.1', it should be the real container ip which you can obtain by issuing commane 'docker-machine ip default`. – mainframer Oct 18 '15 at 07:11
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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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@GrahamJackson toolbox, machine, ... if you are using a VM, you need port forwarding. – VonC Oct 17 '15 at 19:24
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1I exposed port 3000 on the host machine, and I'm still getting the same error. – Jackson Oct 17 '15 at 19:46
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@GrahamJackson I have changed the VBoxManage command, and integrated mainframer's comment. – VonC Oct 18 '15 at 07:55