Docker Compose does not bind ports - docker

Question

I have the following Dockerfile for my container:
FROM centos:centos7
# Install software
RUN yum -y update && yum clean all
RUN yum install -y tar gzip wget && yum clean all
# Install io.js
RUN mkdir /root/iojs
RUN wget https://iojs.org/dist/v1.1.0/iojs-v1.1.0-linux-x64.tar.gz
RUN tar -zxvf iojs-v1.1.0-linux-x64.tar.gz -C /root/iojs
RUN rm -f iojs-v1.1.0-linux-x64.tar.gz
# add io.js to path
RUN echo "PATH=$PATH:/root/iojs/iojs-v1.1.0-linux-x64/bin" >> /root/.bashrc
# go to /src
WORKDIR /src
CMD /bin/bash
I build this container and start the image with docker run -i -t -p 8080:8080 -v /srv/source:/usr/src/app -w /usr/src/app --rm iojs-dev bash. Docker binds the port 8080 to the host port 8080, so that I can access the iojs-application from my client. Everything works fine.
Now I want to start my container with docker-compose, using the following docker-compose.yml
webfrontend:
image: iojs-dev
links:
- db
command: bash -c "iojs test.js"
ports:
- "127.0.0.1:8080:8080"
volumes:
- /srv/source:/usr/src/app
- /logs:/logs
db:
image: mariadb
environment:
MYSQL_ROOT_PASSWORD: 12345
When I now run docker-compose run webfrontend bash I can not access the port 8080 on my host. No port was binded. The result of docker ports is empty and also the result of docker inspect is empty at the port settings:
"NetworkSettings": {
"Bridge": "docker0",
"Gateway": "172.17.42.1",
"IPAddress": "172.17.0.51",
"IPPrefixLen": 16,
"MacAddress": "02:42:ac:11:00:33",
"PortMapping": null,
"Ports": {
"8080/tcp": null
}
},
"HostConfig": {
"Binds": [
"/srv/source:/usr/src/app:rw",
"/logs:/logs:rw"
],
"CapAdd": null,
"CapDrop": null,
"ContainerIDFile": "",
"Devices": null,
"Dns": null,
"DnsSearch": null,
"ExtraHosts": null,
"Links": [
"/docker_db_1:/docker_webfrontend_run_34/db",
"/docker_db_1:/docker_webfrontend_run_34/db_1",
"/docker_db_1:/docker_webfrontend_run_34/docker_db_1"
],
"LxcConf": null,
"NetworkMode": "bridge",
"PortBindings": null,
"Privileged": false,
"PublishAllPorts": false,
"RestartPolicy": {
"MaximumRetryCount": 0,
"Name": ""
},
"SecurityOpt": null,
"VolumesFrom": []
},

Answer 1

This is intentional behavior for docker-compose run, as per documentation:
When using run, there are two differences from bringing up a container normally:
...
by default no ports will be created in case they collide with already opened ports.
One way to overcome this is to use up instead of run, which:
Builds, (re)creates, starts, and attaches to containers for a service.
Another way, if you're using version 1.1.0 or newer, is to pass the --service-ports option:
Run command with the service's ports enabled and mapped to the host.
P.S. Tried editing the original answer, got rejected, twice. Stay classy, SO.

Answer 2

This is intentional behavior for fig run.
Run a one-off command on a service.
One-off commands are started in new containers with the same config as a normal container for that service, so volumes, links, etc will all be created as expected. The only thing different to a normal container is the command will be overridden with the one specified and no ports will be created in case they collide.
source.
fig up is probably the command you're looking for, it will (re)create all containers based on your fig.yml and start them.