On Thu, Apr 9, 2015 at 9:15 AM, Tom Horsley <horsley1953@xxxxxxxxx> wrote: > > I've got a system running centos 7 hosting lots of filesystems > available for NFS mounting. > > I've got a gazillion virtual machines that need to have their > fstab edited to mount these filesystems. > > I've now discovered that mechanically editing the fstab doesn't > work. On most of the VMs, if I say something like this: > > bob:/builder /bob/builder nfs rw,bg,hard,rsize=8192,wsize=8192 0 0 > > then everything "just works", but as I go back in time, when I get > to a machine running fedora 11, I get the highly informative > "incorrect mount option" message. With lots of experimentation, > I eventually found that I could change the type from "nfs" to "nfs4" > and the mount would work. > > Is there a guide somewhere for which idioms to use for which version > of linux I want to mount in? Is there any way to automate adding > these fstab entries correctly? I thought the nfs server was supposed > to automatically fall back to old protocols if the client didn't know > something, am I missing some sort of configuration on the centos 7 host? Fedora defaulted to nfsv4 with F13 so "mount -t nfs ..." on F11 would default to nfsv3 and you had to use "mount -t nfs4 ..." to mount an nfsv4 share. "nfs4" is now deprecated (see "man nfs" on F13 or higher; or perhaps F14 or higher). Use "mount -t nfs -o nfsvers=<vers> ..." to specify a version, whether 2/3/4, except pre-F13 or pre-F14 (I can't remember which). Before the "nfs4" option was deprecated, you specified an nfsv2 or nfsv3 mount with "mount -t nfs -o nfsvers=<vers> ...", an nfsv4 mount with "mount -t nfs4 ...", and you couldn't use "mount -t nfs -o nfsvers=4 ..." for an nfsv4 mount. You could use "nfs4" for all of your mounts from F11 to F21, until it's removed, if ever. You can check which nfs versions are being used by an nfs server with "cat /proc/fs/nfsd/versions" or "rpcinfo -s" or "rpcinfo -p". CentOS 7 defaults to nfsv4 but unless you've disabled nfsv3 or are running a firewall and haven't set nfs up to share through it, nfsv3 mounts should work. Try "mount -v -t nfs ..." on your F11 box and you might get a more verbose error message (if you're lucky!). -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
