Detailed explanation of where the image pulled by docker is stored

20200804Addendum: The article may be incorrect. You can look up other answers.

docker pull xxx, you can pull down the desired image and use it directly, but where is the pulled image stored? Here is a record:

The Docker version here is: Docker version 1.13.1

1. Enter the docker directory as follows:

root@iZuf6axmuekh1n14dwcufmZ:/# cd var/lib/docker/
root@iZuf6axmuekh1n14dwcufmZ:/var/lib/docker# ls
aufs containers image network plugins swarm tmp trust volumes

2. Enter containers, each serial number is a mirror, as follows:

cd containers/
2addde372f5b4850ab167f1067db525313e1569e7117074841cc171acca7621d 4ce1634ce6f17474c8e6696bcf428e621f8c9572e1387316cf8183c97f4ad271

3. Enter one of the images and find the directory structure as follows. This is the content of this image, as follows:

cd 2addde372f5b4850ab167f1067db525313e1569e7117074841cc171acca7621d/
2addde372f5b4850ab167f1067db525313e1569e7117074841cc171acca7621d-json.log checkpoints config.v2.json hostconfig.json hostname hosts resolv.conf resolv.conf.hash shm

4. In the containers directory, there is a folder called image. Enter it as follows:

cd images/aufs 
distribution imagedb layerdb repositories.json

There is a repositories.json file in it, which records some information about the image in detail:

{"Repositories":{"mysql":{"mysql:latest":"sha256:7d83a47ab2d2d0f803aa230fdac1c4e53d251bfafe9b7265a3777bcc95163755","mysql@sha256:1f95a2ba07ea2ee2800ec8ce3b5370ed4754b0a71d9d11c0c35c934e9708dcf1":"sha256:7d83a47ab2d2d0f803aa230fdac1c4e53d251bfafe9b7265a3777bcc95163755"},"tomcat":{"tomcat:latest":"sha256:3dcfe809147daf54fbdbe1f6886b4c49df63f28e2b3c8ac119fef6a7f7490d3c","tomcat@sha256:d167fd5df11d7a7f7a3b04bd08a021948c67c92932ed38c740296c2ae69f67a3":"sha256:3dcfe809147daf54fbdbe1f6886b4c49df63f28e2b3c8ac119fef6a7f7490d3c"}}}

(If the image does not have an aufs directory, it may be like this

 [root@izbp163wlhi02tcaxyu image]# ls
overlay2
[root@izbp163wlhi02tcaxyu image]# cd overlay2/
[root@izbp163wlhi02tcaxyu overlay2]# ls
distribution imagedb layerdb repositories.json

The command line is as follows:

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