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I want to mount a nfs volume with nolock option, and it does mount success. But, the result seem that, the nolock option doesn't work.

[root@k8s-worker-2 opt]# umount nfs-test1/ [root@k8s-worker-2 opt]# mount -t nfs -o nolock,local_lock=all 369d24acc5-iba25.cn-shanghai.nas.aliyuncs.com:/ /opt/nfs-test1/ [root@k8s-worker-2 opt]# mount | grep nfs-test1 369d24acc5-iba25.cn-shanghai.nas.aliyuncs.com:/ on /opt/nfs-test1 type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.83.54,local_lock=none,addr=192.168.83.57)

even the local_lock option doesn't seems ok.

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7

By default mount begins from upper NFS protocol version and descends to lower. In your case NFS server supports version 4 therefore version 4 will be used. But NFS4 doesn't support lock/nolock and local_lock options. man 5 nfs. If you want to use this lock options, then you need append vers=3 option to your mount command.

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  • I've just forgotten to add that NFS 4 has builtin locking mechanism instead of RPC lock mechanism in NFS2/3. Commented Mar 16, 2018 at 10:12

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