Whereas each of the above rules may realize mostly similar results, they work differently. Use the -p flag or -P flag in the Docker run string to publish a port.Use the –expose flag at runtime to expose a port.Add an EXPOSE instruction in the Dockerfile.To containerize an application, you’ll need to write a Dockerfile-which has instructions Docker uses for building and running images.Īt times, you may need to set out some networking rules to enable smooth interaction between containers in multi-container applications or make your Docker ports accessible by services in the outside world. ![]() The Docker open-source platform has revolutionized the way we create, deploy, and manage containerized applications.
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