Why the “none” image appears in Docker and how can we avoid it

by

Below are some parts from What are Docker <none>:<none> images?

The Good <none>:<none>

These are intermediate images and can be seen using docker images -a. They don’t result into a disk space problem but it is definitely a screen “real estate” problem. Since all these <none>:<none> images can be quite confusing as what they signify.

The Bad <none>:<none>

These images are the dangling ones, which can cause disk space problems. These <none>:<none> images are being listed as part of docker images and need to be pruned.

(a dangling file system layer in Docker is something that is unused and is not being referenced by any images. Hence we need a mechanism for Docker to clear these dangling images)

So,

  • if your case has to do with dangling images, it’s ok to remove them with:

     docker rmi $(docker images -f "dangling=true" -q)

    There is also the option of docker image prune but the client and daemon API must both be at least v1.25 to use this command.

  • if your case has to do with intermediate images, it’s ok to keep them, other images are pointing references to them.

Related documentation:

More Related Contents:

  1. How to pass arguments within docker-compose?
  2. Docker COPY from ubuntu absolute path
  3. How to mount local volumes in docker machine
  4. An error, “failed to solve with frontend dockerfile.v0”
  5. Difference between links and depends_on in docker_compose.yml
  6. How to pass ARG value to ENTRYPOINT?
  7. How to pass arguments to a Dockerfile?
  8. Docker Compose wait for container X before starting Y
  9. How to fix docker: Got permission denied issue
  10. What is the difference between docker-compose ports vs expose
  11. Dockerfile if else condition with external arguments
  12. How to update /etc/hosts file in Docker image during “docker build”
  13. Provide static IP to docker containers via docker-compose
  14. Multiple RUN vs. single chained RUN in Dockerfile, which is better?
  15. Conditional COPY/ADD in Dockerfile?
  16. MYSQL_ROOT_PASSWORD is set but getting “Access denied for user ‘root’@’localhost’ (using password: YES)” in docker container
  17. How to get docker-compose to always re-create containers from fresh images?
  18. Docker – unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx
  19. How can I use a variable inside a Dockerfile CMD?
  20. Connect docker python to SQL server with pyodbc
  21. Docker Compose keep container running
  22. How do I prevent root access to my docker container
  23. Dockerfile build – possible to ignore error?
  24. Docker: Using –password via the CLI is insecure. Use –password-stdin
  25. Share variable in multi-stage Dockerfile: ARG before FROM not substituted
  26. How to tag docker image with docker-compose
  27. Pass argument to docker compose
  28. Docker-compose exit code is 137 when there is no OOM exception
  29. Docker 1.10 access a container by its hostname from a host machine
  30. Difference between “docker compose” and “docker-compose”

Leave a Comment