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podman system prune should report the reclaimed space #8658

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bugaevc opened this issue Dec 9, 2020 · 6 comments · Fixed by #8831
Closed

podman system prune should report the reclaimed space #8658

bugaevc opened this issue Dec 9, 2020 · 6 comments · Fixed by #8831
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kind/feature Categorizes issue or PR as related to a new feature. locked - please file new issue/PR Assist humans wanting to comment on an old issue or PR with locked comments.

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@bugaevc
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bugaevc commented Dec 9, 2020

/kind feature

Description

docker system prune reports the reclaimed space at the end:

$ docker system prune
WARNING! This will remove:
  - all stopped containers
  - all networks not used by at least one container
  - all dangling images
  - all dangling build cache

Are you sure you want to continue? [y/N] y
Deleted Containers:
8fcb38ea15ef170c327369012e1d4c4d112f5b046f72903a334351a42b869317

Deleted Images:

deleted: sha256:418ac6a457a2544bfb1bbe9046f002fed3ee4bc1adfd1f3c4c8d45ec373fa8ac
deleted: sha256:ea8ef451b04d7a1e0019635b35bddcfe9be370eb92d952ac92a960d53ef746db
deleted: sha256:ef1dfae27b2770b314dea312dd9ed0fcf2e8bd660218c04c20f0461263c51662
deleted: sha256:740ccc93eab3e4cdd9de3eca878800a9e1f0690f2159adb40c68b7dbba5edd2e
deleted: sha256:aba0e78044385bf12a7eea4d5398bc52c1a783cb792807f4fb9dbb56e2617c1d
deleted: sha256:1e9e09fdf99a8eaba56092093bf8966b8cddcbaf8829fae9a219e9a2ff581b24
deleted: sha256:f6149cf35f6e7b18e122595f0d5392d128f92e7a8cfc17bded48126671f1e2c7
deleted: sha256:d7df63b29760f856fa577d5ca79558cce6f073d415524bd3365aedbcb41eb52f
deleted: sha256:4244afa8d27d5c13d14a4db204de8b57c67a865455d231317db67d9945ddf36b
<...snip...>
deleted: sha256:bd9f4f01725d96a1e37beb4cbf21d24c8dc9e0dafb44aac23b8b9895418c6d9a
deleted: sha256:a0ec0d50c85f08dabb61d7e5f0a9e1b0e90418e0483cb2cd90223f44d7430dfb

Total reclaimed space: 1.216GB

But podman system prune doesn't seem output the same info.
@openshift-ci-robot openshift-ci-robot added the kind/feature Categorizes issue or PR as related to a new feature. label Dec 9, 2020
@bblenard
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I poked at this for a little bit and got something maybe working (at least for reclaimed space for images) but I'm not sure on all of the specific requirements for this feature / if the maintainers want this.

reclaimed_size_output

I can open a PR after I clean up the code more but I would want to know more of the specific requirements such as:

  • What should the relaimed space metric include exactly? Images, Volumes, etc?
  • How should the data be presented. Currently prune reports seem to have a Size: output but it seems to be unformatted and just a byte count
  • Is it okay for the Podman project to pull in dependencies such as go-units from docker if the maintainers want human readable output.

@rhatdan
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rhatdan commented Dec 14, 2020

Reclaimed space should be from containers/images and volumes.
It should be displayed in Human sizes. go-units is already imported, so that is not a problem.

Thanks for working on this.

@bblenard
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@bugaevc I haven't forgotten about this issue. I'm currently trying to wrap up a different PR so I haven't been focusing on this, but I plan to.

@bblenard bblenard mentioned this issue Dec 24, 2020
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@bblenard
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Made some decent progress on this. Not exactly sure the best way to test these changes and I might want to cleanup some of the prune helper functions that are no longer very useful.

progress

@rhatdan
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rhatdan commented Dec 26, 2020

Looks great.

bblenard pushed a commit to bblenard/podman that referenced this issue Dec 31, 2020
Rework pruning to report reclaimed space
b90f7f9 
This change adds code to report the reclaimed space after a prune.
Reclaimed space from volumes, images, and containers is recorded
during the prune call in a PruneReport struct. These structs are
collected into a slice during a system prune and processed afterwards
to calculate the total reclaimed space.

Closes containers#8658

Signed-off-by: Baron Lenardson <lenardson.baron@gmail.com>
@bblenard
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@bugaevc PR opened and ready for review from Podman people: #8831

@github-actions github-actions bot added the locked - please file new issue/PR Assist humans wanting to comment on an old issue or PR with locked comments. label Sep 22, 2023
@github-actions github-actions bot locked as resolved and limited conversation to collaborators Sep 22, 2023
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Rework pruning to report reclaimed space bblenard/podman
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@rhatdan @bugaevc @bblenard @openshift-ci-robot