Apply object retention mode and duration in MinIO with mc retention set
domain: min.io · 6 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Bucket must have object lock enabled (created with mc mb --with-lock).
Apply retention to one object: mc retention set governance 10d myminio/lockedbucket/obj
Set a bucket default for new objects: mc retention set --default compliance 90d myminio/lockedbucket
Apply to all existing objects recursively (+ all versions): mc retention set -r --versions governance 30d myminio/lockedbucket/
Inspect: mc retention info myminio/lockedbucket/obj
Official docs: https://min.io/docs/minio/linux/reference/minio-mc/mc-retention.html
Known gotchas
Only two modes: governance or compliance. compliance cannot be shortened/removed by ANY principal (even root) before expiry; governance can be bypassed with --bypass + s3:BypassGovernanceRetention.
Duration format is Nd or Ny (e.g. 30d, 2y).
Retention is per-version: different versions can carry different retention durations.
Requires object-lock IAM permissions (s3:PutObjectRetention); a plain read-write user cannot set retention.
Changing a bucket's default retention only affects new objects.
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