Docker image prune

Remove unused images. The client and daemon API must both be at least 1. Use the docker version command on the client to check your client and daemon API versions. Prune unused Docker objects Estimated reading time: minutes 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. How does one remove an image in Docker? What is the difference between Docker and container?

Older versions of Docker prune volumes by default, along with other Docker objects. On older versions, run docker container prune , docker network prune , and docker image prune separately to remove unused containers, networks, and images , without removing volumes. I never used this comman to be honest, I like a bit more control over what I clean up. In Docker to remove all images , or a few you no longer nee you can use docker system prune. A dangling image is an image that is not tagged and is not used by any container.

To remove dangling images type: docker image prune. Following command gives list of dangling images. Unused images are images that have tags but currently not being used as a container. You may or may not need it in future.

How to remove old and unused Docker images. Or maybe I want it based on image name. See the docker network prune reference for more examples.

The docker system prune command is a shortcut that prunes images , containers, and networks. This repo contains logic to remove Docker images from either a Docker machine, or a Docker Trusted Repository. Logic about which images to expire is based on a date-time stamp embedded in image tags. This code does not directly delete a DTR image.

In actuality, this functionality simply removes the tag for an image on the DTR. If you want to remove both unused and dangling images at once, you can use prune with option -a: docker image prune -a. Specify one or more image attributes to add to your pruning criteria, then choose: Prune future tags to save the policy and apply your selection to future tags. Only matching tags after the policy addition will be pruned during garbage collection.

Prune all tags to save the policy, and evaluate both existing and future tags on your repository. The last command above will not remove all running containers. The Docker daemon does not automatically garbage collect unused images. You can remove unused images using the docker image prune (and the related docker system prune ) commands.

Store is, among other things, a registry of Docker images. You can think of the registry as a directory of all available Docker images. A picture from this blog post is worth a thousand words.

For deeper understanding please read this.