I am very to new Docker so please pardon me if this this is a very silly question. Googling hasn’t really produced anything I am looking for. I have a very simple Dockerfile which looks like the following
FROM node:9.6.1
RUN mkdir /usr/src/app
WORKDIR /usr/src/app
ENV PATH /usr/src/app/node_modules/.bin:$PATH
# install and cache app dependencies
COPY package.json /usr/src/app/package.json
RUN npm install --silent
COPY . /usr/src/app
RUN npm start
EXPOSE 8000
In the container the app is running on port 8000. Is it possible to access port 8000 without the -p 8000:8000? I just want to be able to do
docker run imageName
and access the app on my browser on localhost:8000
3
By default, when you create a container, it does not publish any of its ports to the outside world. To make a port available to services outside of Docker, or to Docker containers which are not connected to the container’s network, use the --publish or -p flag. This creates a firewall rule which maps a container port to a port on the Docker host.
Read more: Container networking – Published ports
But you can use docker-compose to set config and run your docker images easily.
- First installing the
docker-compose. Install Docker Compose -
Second create
docker-compose.ymlbeside theDockerfileand copy this code on themversion: '3' services: web: build: . ports: - "8000:8000" -
Now you can start your docker with this command
docker-compose up
If you want to run your services in the background, you can pass the -dflag (for “detached” mode) todocker-compose up -dand use `docker-compose ps to see what is currently running.
Docker Compose Tutorial
Old question but someone might find it useful:
-
First get the IP of the docker container by running
docker inspect -f ‘{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}’ container_name_or_id
-
Then connect to it from the the browser or using curl using the IP and port exposed :
Note that you will not be able to access the container on 0.0.0.0 because port is not mapped