跳至主要内容

Modify container and create image

Commit a new image

Start a container​

docker run -it -d --name custom-container python:3.11-slim-bullseye

Do something in container​

First get into container

docker exec -it custom-container /bin/bash

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Then we will create an image with Vim pre-installed

Check if Vim is installed

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Install Vim

apt-get update
apt-get install vim -y

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Vim is installed now

vi --version

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Press CTRL + D or type exit to Exit the container

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Commit​

How commit command works

Usage:  docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

Create a new image from a container's changes

Aliases:
  docker container commit, docker commit

Options:
  -a, --author string    Author (e.g., "John Hannibal Smith <[email protected]>")
  -c, --change list      Apply Dockerfile instruction to the created image
  -m, --message string   Commit message
  -p, --pause            Pause container during commit (default true)

Get container ID

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Commit a new image

docker commit <your container id> custom-image:vim-installed
docker commit <your container id> custom-image:do-something
docker commit <your container id> custom-image:latest

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Try new image​

docker run -it -d --name custom-container-2 custom-image:latest
docker exec -it custom-container-2 /bin/bash
vi --version

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Publish image

Login​

Push​

Now we have a custom image custom-image:latest.

Try push this image to DockerHub, got denied.

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  • Tag image

    Tag the image with your user name as prefix

    # docker tag custom-image:latest <your username>/custom-image:latest
    docker tag custom-image:latest uuboyscy/custom-image:latest

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  • Push

    # docker push <your username>/custom-image:latest
    docker push uuboyscy/custom-image:latest

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    Then find your first image on DockerHub

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