How to compress docker image

Compressed image:

1. Use docker export and docker import

docker export is used to save a container, so we need to have one This command can only be used with running containers.

docker export <CONTAINER ID> > export.tar

docker import is used to load the saved container, but it cannot be restored to a container, but to a mirror

docker import export.tar <IMAGE NAME>:[TAG]

It can be achieved with one command

docker export <容器ID> | docker import - <镜像名>[:标签]

Use export The image obtained after importing will not save the image history, so the image will become smaller.

The test image is not compressed, and the test/import image is a compressed image. You can see that it has become smaller:

2. Use docker-squash

github address: https://github.com/jwilder/docker-squash

docker save <image id> | sudo docker-squash -t newtag | docker load

For more related tutorials, please pay attention to PHP Chinese websitedocker tutorial Column.

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