On 8/1/24 22:52, Jeff Layton wrote:
On Sun, 2024-01-07 at 23:33 +0100, Cedric Blancher wrote:
Good evening!
Generic issue in all of nfs-utils: None of the utils properly support
NFSv4 with non.standard (TCP/2049) port numbers.
mount supports it for mounting, but does not show it for listing mounts
/proc/mounts does not show the port number either
mount just gets the mount info from /proc/mounts, which absolutely does
show a port= option when you use a different port than 2049.
showmount -e does not support a port number
showmount talks directly to mountd so you wouldn't usually point it at
the same port nfs is listening on. As with most sunrpc based tools, it
queries rpcbind in order to determine what port to talk to. If you're
going to use stuff like showmount, then you need to ensure that rpcbind
is reachable and that the daemons register with it properly.
autofs does not support non-2049 port numbers
nfsd referrals do not support setting non-2049 port numbers
The same goes for autofs. It just calls /bin/mount. I think (but am not
sure) that even with NFSv4, when the client can't contact the server on
port 2049, it'll try to use rpcbind to determine the port.
That is exactly what autofs does, and always has done.
The other thing to be aware of is if you want NFSv4 only you need to tell
autofs that by using the option fstype=nfs4 so that it doesn't try to fall
back to earlier NFS versions and also tries to avoid contacting rpcbind.
Ian
Alternately, if you don't want to deal with rpcbind for mounting, you
could also specify a hardcoded "port=" mount option in your autofs maps.
...
Could you please make a concentrated effort and allow non-2049 port
numbers for NFSv4 mounts, in all of the lifecycle of a NFSv4 mount?
From nfsd, nfsd referrals, client mount/umount, autofs
mount/umount+LDAP spec
Ced
---------- Forwarded message ---------
From: Cedric Blancher <cedric.blancher@xxxxxxxxx>
Date: Sun, 7 Jan 2024 at 22:32
Subject: showmount -e with custom port number?
To: Linux NFS Mailing List <linux-nfs@xxxxxxxxxxxxxxx>
Good evening!
How can I get showmount -e to use a non-2049 TCP port number to show
mounts on a NFSv4 server?
/sbin/showmount -e localhost@30000
clnt_create: RPC: Unknown host
