Before this patch, `docker image ls` / `docker image ls` would always
show untagged images, but hide "dangling" images (which effectively
only were produced by the legacy builder) unless `-a` / `--all` was
used. This often resulted in many `<none>:<none>` or `<untagged>` images
to be shown, which had little value to interact with, other than to
garbage collect (`docker system prune`).
In future, we want to take more advantage of containerd's garbage-collecting
features (removing unused images automatically), and this UX change is
a stepping stone toward that.
For now, this patch only changes the behavior for `docker image ls --tree`,
but we should make this the same for "non" --tree as well.
This patch:
- changes `docker image ls` to hide both "untagged" and "dangling" images
by default.
- changes the behavior of `--all` on the client side to make them visible
The API response remains the same for now, but this is something we can
consider changing in future (possibly more granular than a single boolean).
Before this patch;
docker image ls --tree
i Info → U In Use
IMAGE ID DISK USAGE CONTENT SIZE EXTRA
docker:cli 28fb556c1ea1 276MB 69.8MB
├─ linux/amd64 828f4f57525d 0B 0B
├─ linux/arm/v6 563c0b58e54b 0B 0B
├─ linux/arm/v7 6045d4846c59 0B 0B
└─ linux/arm64/v8 11e8dfd68841 276MB 69.8MB
alpine:latest a8560b36e8b8 12.8MB 3.99MB U
├─ linux/amd64 1c4eef651f65 0B 0B
├─ linux/arm/v6 903bfe2ae994 0B 0B
├─ linux/arm/v7 9c2d245b3c01 0B 0B
├─ linux/arm64/v8 757d680068d7 12.8MB 3.99MB U
├─ linux/386 2436f2b3b7d2 0B 0B
├─ linux/ppc64le 9ed53fd3b831 0B 0B
├─ linux/riscv64 1de5eb4a9a67 0B 0B
└─ linux/s390x fe0dcdd1f783 0B 0B
<untagged> c6c1bcb0fd8d 12.8MB 3.99MB
└─ linux/arm64 cb171c618ae8 12.8MB 3.99MB
<untagged> 7361ef970703 12.8MB 3.99MB
└─ linux/arm64 07033f43e44a 12.8MB 3.99MB
<untagged> 0c62c63b81ec 12.8MB 3.99MB
└─ linux/arm64 94742272117f 12.8MB 3.99MB
<untagged> 91dd947eebd0 12.8MB 3.99MB
└─ linux/arm64 ee55d203e26f 12.8MB 3.99MB
<untagged> 382d9f57e8d8 12.8MB 3.99MB
└─ linux/arm64 5256d47804e3 12.8MB 3.99MB
<untagged> 56fa17d2a7e7 12.8MB 3.99MB
├─ linux/amd64 483f502c0e6a 0B 0B
├─ linux/arm/v6 c79529000bdf 0B 0B
├─ linux/arm/v7 cc455d4b2c47 0B 0B
├─ linux/arm64/v8 508c1b94e1d2 12.8MB 3.99MB
├─ linux/386 f32403957113 0B 0B
├─ linux/ppc64le 23dbce23b88f 0B 0B
├─ linux/riscv64 f9d2da150cee 0B 0B
└─ linux/s390x 6bb03952a007 0B 0B
After this patch
docker image ls --tree
i Info → U In Use
IMAGE ID DISK USAGE CONTENT SIZE EXTRA
docker:cli 28fb556c1ea1 276MB 69.8MB
├─ linux/amd64 828f4f57525d 0B 0B
├─ linux/arm/v6 563c0b58e54b 0B 0B
├─ linux/arm/v7 6045d4846c59 0B 0B
└─ linux/arm64/v8 11e8dfd68841 276MB 69.8MB
alpine:latest a8560b36e8b8 12.8MB 3.99MB U
├─ linux/amd64 1c4eef651f65 0B 0B
├─ linux/arm/v6 903bfe2ae994 0B 0B
├─ linux/arm/v7 9c2d245b3c01 0B 0B
├─ linux/arm64/v8 757d680068d7 12.8MB 3.99MB U
├─ linux/386 2436f2b3b7d2 0B 0B
├─ linux/ppc64le 9ed53fd3b831 0B 0B
├─ linux/riscv64 1de5eb4a9a67 0B 0B
└─ linux/s390x fe0dcdd1f783 0B 0B
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
f18e239a53