I'm using Docker 1.12.6.
I have pulled an image from the Docker registry.
I have exported the images as tar files using the docker save command.
I removed the original image and container and loaded the exported image using docker load -i myImage.tar.
Now, when running docker images I notice my image have lost its repository/tag information:
REPOSITORY TAG IMAGE ID CREATED SIZE
<none> <none> 5fae4d4b9e02 8 weeks ago 581.3 MB
Why does it have this behavior and how do I keep the original image name?
Use
docker save -o filename.tar <repo>:<tag>
The command docker save <image id> removes the repository and tag names.
To solve this, use docker save <repo>:<tag> it will keep the repository and tag name in the saved file. For example:
docker save -o ubutu-18.04.tar ubuntu:18.04
I had the same problem, so then I used with the following command to fix it manually:
docker tag <Image-ID> <desired Name:Tag>
Reference
[NOTE]:
It's inconsistent: docker save image-repo-name -> docker load
restores name, docker save SHA -> docker load no names or tags,
docker save name:latest -> docker load no names or tags.
AND:
The current (and correct) behavior is as follows:
docker save repo
Saves all tagged images + parents in the repo, and creates a
repositories file listing the tags
docker save repo:tag
Saves tagged image + parents in repo, and creates a repositories file
listing the tag
docker save imageid
Saves image + parents, does not create repositories file. The save
relates to the image only, and tags are left out by design and left as
an exercise for the user to populate based on their own naming
convention.
Reference
A single image ID can have multiple names/tags,
so the way that you loose the the names and tags is
what I would expect to happen after saving and loading the image to/from a tar ball.
Mode details are in the discussion about it here
From docker documentation:
cat exampleimage.tgz | docker import - exampleimagelocal:new
root@mymachine:/tmp# cat myimage.tar | docker import --message "New image imported from tarball" - reponame:my-image-name
sha256:be0794427222dcb81182a59c4664b350ecb5ffb7b37928d52d72b31
root@mymachine:/tmp# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
reponame my-image-name be0794427222 6 seconds ago 4.31GB
This one worked for me.
