FrankYang0529 opened a new pull request, #76418:
URL: https://github.com/apache/airflow/pull/76418
### Why
- On PRs that build the CI image on GitHub-hosted runners, every job that
loads the image rejects the CI image snapshot.
- The last commit of #74173 added `%U %G %s` to the `find` listing behind
the check on a restored snapshot. The goal was to reject a restore that changes
ownership or truncates a file.
- Two kinds of size in the `find` listing differ for the same image:
- Sizes of directories. On ext4, the size of a directory depends on the
order in which its entries were added and on the hash seed of the filesystem. A
restored layer gets its entries in a different order from the original layer on
the runner that built the image (the builder).
- Sizes of files that Docker writes for each container. `/etc/resolv.conf`
holds the host's DNS search domain, `/etc/hosts` depends on the IPv6 setting,
and `/etc/hostname` depends on the hostname.
### How
- The `find` listing no longer has a size for directories or for
`/etc/hostname`, `/etc/hosts` and `/etc/resolv.conf`. Every entry still has its
path, type, mode, owner and group. Apart from directories and those three
files, every entry also still has its size. So a truncated file or a changed
owner still fails the check.
- When the check rejects a restored image, the script now prints the
rejection message with `::warning::`. GitHub lists that warning in the
annotations on the summary page of the run, so we don't need to search a job
log to find it.
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