[Docker](Command)Docker system prune

Purpose

Delete old data that is not used in docker

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docker system prune

https://docs.docker.com/engine/reference/commandline/system_prune/

Remove all unused containers, networks, images (both dangling and unreferenced), and optionally, volumes.

option

• -filter : Provide filter values
• f : Do not prompt for confirmation
• a : Remove all unused images not just dangling ones

until=120h : until () - only remove containers, images, and networks created before given timestamp

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How to use

crontab 등록

0 3 * * * /usr/bin/docker system prune --filter "until=120h" -fa 

위와 같이 crontab에 등록하여 주기적으로 사용하지 않는 docker와 관련된 데이터들을 삭제한다.