docs: replace misleading Compose lifecycle hook examples#24866
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docs: replace misleading Compose lifecycle hook examples#24866lacatoire wants to merge 2 commits into
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<!--Delete sections as needed --> ## Description Closes docker#25035 Replaces and closes docker#24650 Closes docker#24853 Replaces and closes docker#24866 Closes docker#23678 Closes docker#24812 Replaces and closes docker#23816 Verified against the Compose code base ## Related issues or tickets <!-- Related issues, pull requests, or Jira tickets --> ## Reviews <!-- Notes for reviewers here --> <!-- List applicable reviews (optionally @tag reviewers) --> - [ ] Technical review - [ ] Editorial review - [ ] Product review
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The
post_startexample (chowning a volume so the app can use it) and thepre_stopexample (flushing caches) don't survive a careful read: the post_start hook runs in parallel with the entrypoint so it cannot reliably prepare the filesystem before the app reads it, and pre_stop doesn't run on abrupt termination so it's the wrong place to flush state the application should already flush on a graceful stop.Replace both examples with cases that match the documented hook semantics (external registration on start, external de-registration on stop), and add a short caveat explaining why the previous patterns were wrong to attempt.
Fixes #24853