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Expose A Port
Create Dockerfile
EXPOSE
in the Dockerfile with -p
in the docker run
command makes the container accessible via that port on the host machine.
# Build from base image
FROM ubuntu:latest
# Expose port 11
EXPOSE 11
Build Image From Dockerfile
Build the Dockerfile (docker build
) in the current directory (.
) and call the image chrisalbon/ubuntu:expose-ports (--tag chrisalbon/big-project:expose-ports
).
docker build --tag chrisalbon/big-project:expose-ports .
Sending build context to Docker daemon 4.608kB
Step 1/2 : FROM ubuntu:latest
---> 1e4467b07108
Step 2/2 : EXPOSE 80
---> Running in cc2bc925b04a
Removing intermediate container cc2bc925b04a
---> 14f33f55140f
Successfully built 14f33f55140f
Successfully tagged chrisalbon/ubuntu:expose-port
Run Docker Container From Image
Start and create (docker run
) an interative (-it
) Docker container called expose-ports (--name copy-example
) from the image called chrisalbon/big-project:expose-ports
. Publish port 11 inside the contain with port 22 outside the container (-p 11:22
). Open a shell (/bin/bash
). Remove the container after it stops (-rm
).
docker container run -p 11:22 -it --name expose-port chrisalbon/big-project:expose-ports /bin/bash
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