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nfs(5) lists both 'nolock' and 'local_lock=' under "Options for NFS versions 2 and 3 only". NFSv4 carries locking in the protocol and has no NLM sideband to switch off, so the kernel accepts the token and reports local_lock=none. mount_opts had the condition inverted: the branch that can work sat on v3, the inert one on v4 - and svc-storage-nfs-server pins nfs_version: 4, so the effective locking configuration was always the dead branch. The artifact proves it landed nowhere: the mount module ran with local_lock=flock in opts on every node, every other token from that same string is present in /proc/mounts (soft, timeo=50, retrans=3, _netdev), and only local_lock reads 'none'. The false premise had spread. docker-entrypoint-suitecrm.sh justified its mkdir mutex with 'the swarm NFS mount forces local_lock=flock, so flock(2) never crosses nodes'; that comment is removed. The mkdir mutex stays correct for a different reason: against this ganesha export a non-blocking flock works while a blocking one returns EIO. Nothing about the effective mount changes - the option was already being discarded. On an existing host the first run rewrites fstab and remounts /var/lib/infinito once. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>