How to remove <none> images after building

[mrtshoot]

Great.also has this problem.
thanks for it

[45007 (Devnote)]

Try this:

docker rmi `docker images | grep "<none>" | awk {'print $3'}`

[meyay (Metin Y.)]

… or instead of using grep and awk in pipes with docker’s build-in functionality:

docker image rm $(docker image ls --filter dangling=true -q)

It’s quite odd that docker rm does not accept the --filter argument.

All effective ways are fine as long as they get the job done

[hassanzadeh]

you can use this command
docker image rm -f $(docker images | grep "<none>" | awk '{print$3}')

[rofrano (John Rofrano)]

There is really no need for using grep and awk or any fancy long commands.

Just use:

docker image prune

and it will prune all dangling images.

[ahipe]

This really help all issue above mention…

[11111368]

thank you so much it works for me

[thahgr]

just wanted to add my command as well, just using pipes, if anybody finds it helpful

docker images  | grep '<none>' | awk '{print $3}' | xargs  docker image rm -f {}

[toinetoine (Antoine Dahan)]

Both docker image rm $(docker images --filter "dangling=true" -q --no-trunc) and docker image prune are equivalent. Both will only delete all images with no tag (dangling images). Unused, non-dangling images (images without a tag value of <none>) will not be deleted.

[debryc]

I’ve tried docker images prune -a but am still left with a <none> image.

I wonder if this is what’s happening.

@rofrano

The reason untagged images happen is because you built an image, then you changed the Dockerfile and built that image again and it reused some of the layers from the previous build. Now you have an untagged image which cannot be deleted because some of it’s layers are being used by a new version of that image.

The solution is to:

• Delete the new version of the image
• Delete the untagged image and
• Rebuild the new version of the image so that it owns all of the layers.

You will be left with a single tagged image that contains all of the layers of the previous untagged images and the new image.

I’m not sure how to follow the steps, though, because I’m completely new to programming. What are the breakdowns for each step? I’m on DigitalOcean.

[rofrano (John Rofrano)]

The command to remove an image is:

docker rmi {image_name}

Where {image_name} is the name of the image you want to delete. You can also use the image ID to delete the image (e.g., docker rmi {image_id}). This is what you will need to use to delete an image with a name of <none>.

For example, Let’s say you have the following images:

REPOSITORY           TAG        IMAGE ID       CREATED              SIZE
my-new-image         latest     c18f86ab8daa   12 seconds ago       393MB
<none>               <none>     b1ee72ab84ae   About a minute ago   393MB
my-image             latest     f5a5f24881c3   2 minutes ago        393MB

It is possible that the <none> image cannot be deleted because the my-new-image is using some layers from it. What you need to do is:

docker rmi my-new-image:latest
docker rmi b1ee72ab84ae
docker built -t my-new-image .

What that does is remove my-new-image:latest which is reusing layers from the <none> image. It then deletes the <none> image using it’s image ID b1ee72ab84ae. Finally it rebuilds my-new-image creating all of the layers that are needed.

Also check to make sure that you don’t have stopped containers that are still using the <none> “untagged” image. Use docker ps -a to see all containers including ones that have exited. If so, use docker rm {container_id} to remove the container and then try and remove the <none> image again.

Hope that helps.

[debryc]

Thank you for this super clear explanation!

[rofrano (John Rofrano)]

You’re welcome. I’m glad that helped.

[ajeetraina (Ajeet Singh Raina)]

Why don’t you use docker system prune command?

The ‘docker system prune’ command is used to remove all unused data from the Docker system. This includes containers, images, networks, and volumes that are not in use by any running containers. It can also remove any stopped containers and all unused networks, and it will free up disk space on the host machine. The command also provides the option to remove all unused images not just dangling ones.

[dataheadless]

Following article might be helpful to you

Cleaning up docker images

[smolwhal (Morten Grøftehauge)]

Y’all need to learn to write code like this rather than like this. Here’s what happens to double quotes:

""

“”

Most terminals do not accept fancy double quotes instead of ASCII double quotes. I would argue that it was bad if they did.