CODEWITHSUNDEEP
ruby-on-railsdockerdocker-composeportdockerfile
cute_marmalade
cute_marmalade

Reputation: 943

Docker container with published port not accessible from outside

My Docker container is running Rails on port 3000, and I'm publishing the port to port 8900. See:

$ docker-compose ps

Name                    Command               State            Ports
rails_poc_1   /bin/sh -c puma -C config/ ...   Up       0.0.0.0:3000->8900/tcp

However, when visiting http://localhost:8900 my browser displays ERR_CONNECTION_REFUSED.

When curling port 3000 from inside the container with docker exec 8fcceed1d477 curl localhost:3000 I get a valid response which proves Rails is working properly.

Am I overlooking something?

Upvotes: 0

Views: 455

Answers (1)

jjj
jjj

Reputation: 126

I think you have your port mapping reversed. Your ps line should look more like:

0.0.0.0:8900->3000/tcp

If you want to access 3000 outside the container as 8900

Upvotes: 1

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