How to automatically clear the none image of Docker
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In docker build or pull, a mirror is often generated, which is called dangling in Docker, and is characterized by the fact that label is none.
A large number of none images will burst the disk, resulting in disk full, unable to create files.
1. The docker image labeled as
The following is a set of none images:
[root@ccg] # docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
Centos6.5 v2 434c6fa14315 9 seconds ago 254.8 MB
819f53017d76 56 minutes ago 254.8 MB
II. Clean-up methods
How do I clear the mirror?
1. Use docker image prune
two。 Use docker rmi
Let's start with the first one:
To delete a mirror using docker prune, we just need to execute:
Docker image prune-f
The second way:
Docker rmi-f `docker images | grep''| awk'{print $3}'`
In addition, we often need to clean up the abnormal exit containers in the system.
Docker rm `docker ps-a | grep Exited | awk'{print $1}'`
III. Configuration automation
Automatic deletion of configuration, configure crontab on the corresponding machine
1. Crontab-e
two。 Add the following directive (remove the image of the none tag and the exception exit container before the wee hours of the morning, respectively)
59 23 * docker rmi-f `docker images | grep''| awk'{print $3}'`
59 23 * docker rm `docker ps-a | grep Exited | awk'{print $1}'
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