Docker remove TAG images

by

You can try and list only untagged images (ones with no labels, or with label with no tag):

docker images -q -a | xargs docker inspect --format="{{.Id}}{{range $rt := .RepoTags}} {{$rt}} {{end}}"|grep -v ':'

However, some of those untagged images might be needed by others.

I prefer removing only dangling images:

docker rmi $(docker images --filter "dangling=true" -q --no-trunc)

As I mentioned for for docker 1.13+ in Sept. 2016 in “How to remove old and unused Docker images“, you can also do the image prune command:

docker image prune

That being said, Janaka Bandara mentions in the comments:

This did not remove <none>-tagged images for me (e.g. foo/bar:<none>); I had to use docker images --digests and docker rmi foo/bar@<digest>

Janaka references “How to Remove a Signed Image with a Tag” from Paul V. Novarese:

# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
pvnovarese/mprime        latest              459769dbc7a1        5 days ago          4.461 MB
pvnovarese/mprime        <none>              459769dbc7a1        5 days ago          4.461 MB

Diagnostic Steps

You can see the difference in these two entries if you use the --digests=true option (the untagged entry has the Docker Content Trust signature digest):

# docker images --digests=true
REPOSITORY               TAG                 DIGEST                                                                    IMAGE ID            CREATED             SIZE
pvnovarese/mprime        latest              <none>                                                                    459769dbc7a1        5 days ago          4.461 MB
pvnovarese/mprime        <none>              sha256:0b315a681a6b9f14f93ab34f3c744fd547bda30a03b55263d93861671fa33b00   459769dbc7a1        5 days ago

Note that Paul also mentions moby issue 18892:

After pulling a signed image, there is an “extra” entry (with tag <none>) in “docker images” output.
This makes it difficult to rmi the image (you have to force it, or else first delete the properly-tagged entry, or delete by digest.

More Related Contents:

  1. How is Docker different from a virtual machine?
  2. How to access host port from docker container [duplicate]
  3. How to run a cron job inside a docker container?
  4. How to get the IP address of the docker host from inside a docker container [duplicate]
  5. How do I get into a Docker container’s shell?
  6. What is linux equivalent of “host.docker.internal” [duplicate]
  7. Using Docker-Compose, how to execute multiple commands
  8. Permission denied on accessing host directory in Docker
  9. What is the difference between a Docker image and a container?
  10. What does –net=host option in Docker command really do?
  11. accessing a docker container from another container
  12. docker run
  13. standard_init_linux.go:190: exec user process caused “no such file or directory” – Docker
  14. Why is docker build not showing any output from commands?
  15. Kubernetes Pod Warning: 1 node(s) had volume node affinity conflict
  16. Pass environment variable into a Vue App at runtime
  17. How to continue a Docker container which has exited
  18. Re-using environment variables in docker-compose.yml
  19. How to use the host network, and any other user-defined network together in Docker-Compose?
  20. How to mount volume from container to host in Docker?
  21. Connect to Kafka on host from Docker (ksqlDB)
  22. How to move Docker containers between different hosts?
  23. How to execute command from one docker container to another
  24. How to specify different .dockerignore files for different builds in the same project?
  25. How do I download Docker images without using the pull command?
  26. apt-get update fails with 404 in a previously working build
  27. How to tag docker image with docker-compose
  28. Finding the layers and layer sizes for each Docker image
  29. What’s the best way to share files from Windows to Boot2docker VM?
  30. docker – how do you disable auto-restart on a container?

Leave a Comment