[Docker 배우기] Section 4. Docker Images

Docker for the Absolute Beginner - Hands On - DevOps | Udemy

Dockerfile can be used to make a custom docker image.

• FROM: starting image from another image
• RUN: executes certain commands behind it
• COPY: copy certain files to the image
• ENTRYPOINT: specify a command that runs when the container is started
  • the parameter can be delivered by appending the parameter to docker run
• ENV: specify environmental variable
  • can also be used as docker run -e [variable]
• CMD: specifies the command to run when docker starts, but unlike ENTRYPOINT, it can be overwritten when docker run

 

docker build: used to create a docker image from Dockerfile

• the commands in the Dockerfile are made into layers that build on top of each other
  • faster rebuild due to caching

 

docker push: pushes the image to the public hub