How to remove unused object or data in Docker

Photo by Andrew Haimerl on Unsplash

Hello friend, in this article, I’d like to go over some of these additional methods and explain how they might be useful. we want to learn something trick to remove unused data in Docker .

Docker takes a conservative approach to cleaning up unused objects (often referred to as “garbage collection”), such as images, containers, volumes, and networks: these objects are generally not removed unless you explicitly ask Docker to do so. This can cause Docker to use extra disk space. For each type of object, Docker provides a prune command. In addition, you can use docker system prune to clean up multiple types of objects at once. This topic shows how to use these prune commands.

lets clean up docker from unused object, before we start be carefull everything is going to permanently deleted. and it with you own risk 😜

1. Remove Unused docker image

to remove unused image we can execute simply command below

$ docker image prune

Usage : docker image prune [OPTIONS]

Options:

-a, — all           Remove all unused images, not just dangling ones
    — filter filter Provide filter values (e.g. ‘until=<timestamp>’)
-f, — force         Do not prompt for confirmation

2. Remove unused data or volume in docker

you can simply execute this command to remove unused data or volume

$ docker volume prune

Usage: docker volume prune [OPTIONS]

Remove all unused local volumes

Options:

— filter filter  Provide filter values (e.g. ‘label=<label>’)
-f, — force      Do not prompt for confirmation

3. Remove unused container

syntax;

$ docker container prune

Usage: docker container prune [OPTIONS]

Options:

--filter filter   Provide filter values (e.g. 'until=<timestamp>')
-f, --force       Do not prompt for confirmation

4. remove unused network

syntax

$ docker network prune

Usage: docker network prune [OPTIONS]

Remove all unused networks

Options:
 — filter filter  Provide filter values (e.g. ‘until=<timestamp>’)
 -f, — force      Do not prompt for confirmation

5. Then how to Remove All

we can using this command

$ docker system prune

The ‘docker system prune’ is a Docker command that is used to remove or delete unused objects or data, it might be images, container, volume, or network as these objects are not removed unless we explicitly remove those objects, however, we need to specify the ‘–volumes’ option to remove volumes in Docker

Options:

Options:
  -a, --all          Remove all unused images not just dangling ones
      --filter filter Provide filter values (e.g. 'label=<key>=<value>')
  -f, --force           Do not prompt for confirmation
      --volumes         Prune volumes

That’s it…