Build your own Docker image

Container to Image (not recommended)

Create a container with centos image, modify the contents of the container

docker image ls

docker run -it centos

yum install -y vim

exit

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Looking at the container and converting it to an Image, I noticed that it was slightly larger than the native centos. Create new image name liming/centos-vim

docker container ls -a

docker commit

docker commit container name liming/centos-vim

docker image ls

Look at the layer relationship of the new image. The newly created image is actually adding a layer above the centos layer.

docker history Container ID

Container ID of docker history centos

The above method of publishing an Image is actually not recommended and unsafe, because of the possibility of publishing an unstable Image.

Docker build means Dockfile (recommended)

Delete images and containers created earlier

docker image rm liming/centos-vim

docker image ls

docker container ls

docker container ls -a

docker container rm c5a14ab5c071

docker container ls -a

docker container ls

Creating Dockerfile

mkdir docker-centos-vim

cd docker-centos-vim/

vim Dockerfile

Edit Dockerfile

FROM centos

RUN yum install -y vim

Dockerfile build

docker build -t liming/centos-vim-new .

PS: Why do you recommend Dockerfile, because files can be edited at will, if you use containers, how can you send trouble to others? It's still convenient for a single file.

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