Enable indefinite legal hold (WORM) on MinIO objects with mc legalhold set
domain: min.io · 6 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
The bucket must have object locking enabled (created via mc mb --with-lock).
Hold a single object: mc legalhold set ALIAS/bucket/object.txt.
Hold all existing objects under a bucket/prefix: mc legalhold set --recursive ALIAS/bucket/.
Hold a specific version (versioned bucket): mc legalhold set --version-id <vid> ALIAS/bucket/object.txt.
Hold versions that existed at a point in time: mc legalhold set --rewind '1d2hh3mm4ss' ALIAS/bucket/object.txt.
Verify with mc legalhold info ALIAS/bucket/object.txt.
Known gotchas
Legal hold is INDEFINITE and enforces complete immutability until explicitly cleared — it never expires.
--recursive only affects objects that exist NOW; new objects need the command run again.
Only privileged users with s3:PutObjectLegalHold permission can set/lift legal hold.
Legal hold overrides retention: an object under legal hold stays locked even after a governance/compliance retention period expires, and retention changes have no effect until the hold is lifted.
--rewind and --version-id require bucket versioning.
Official docs: https://docs.min.io/aistor/reference/cli/mc-legalhold/
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