Enable legal hold (WORM object lock) on MinIO objects (mc legalhold set)
domain: min.io · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Ensure the bucket has object locking enabled: create with mc mb --with-lock, or enable on an existing bucket with mc retention set --default (possible since RELEASE.2025-05-20T20-30-00Z).
Lock a single object: mc legalhold set ALIAS/BUCKET/object.txt
Lock all objects in a bucket/prefix: mc legalhold set --recursive ALIAS/BUCKET
Lock a specific version (requires versioning): mc legalhold set --version-id <version-id> ALIAS/BUCKET/object.txt
Lock the versions that existed at a point in time: mc legalhold set --rewind "2025.03.24T10:00" ALIAS/BUCKET
Known gotchas
Legal hold is indefinite; only a user with s3:PutObjectLegalHold permission can set or lift it.
When an object has both a retention rule and legal hold, it stays locked until the legal hold is lifted AND the rule expires.
--version-id is mutually exclusive with --versions, --recursive, and --rewind.
--rewind/--version-id/--versions all require bucket versioning.
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