[CentOS] can i run NFS *exclusively* off of v4?

Robert P. J. Day rpjday at crashcourse.ca
Fri Sep 17 14:19:03 EDT 2010


On Fri, 17 Sep 2010, Robert P. J. Day wrote:

>
>   is it possible to set up NFS on centos 5.5 so that it uses *only*
> version 4?  i tried this not that long ago on fedora and was surprised
> to see a complaint when i tried to start the server and was told that
> i was missing required functionality of NFSv1, or something equally
> weird.  i'll check the /etc/init.d/nfs script, but i think what got me
> into trouble was trying to use the entire set of options:
>
>   "--no-nfs-version 1 --no-nfs-version 2 --no-nfs-version 3"
>
>   i'm going to try it again this afternoon on centos 5.5, but has
> anyone else tried this?  should it *theoretically* work?

  as an actual example of what i'm talking about, if you take a look
at /etc/sysconfig/nfs on centos 5.5, consider these lines:


# Define which protocol versions mountd
# will advertise. The values are "no" or "yes"
# with yes being the default
#MOUNTD_NFS_V1="no"
#MOUNTD_NFS_V2="no"
#MOUNTD_NFS_V3="no"


  theoretically, should i be able to uncomment all of those lines so
that mountd advertises only V4?  i would have thought so but, if i do
that:

# service nfs restart
Shutting down NFS mountd:                                  [FAILED]
Shutting down NFS daemon:                                  [  OK  ]
Shutting down NFS quotas:                                  [  OK  ]
Shutting down NFS services:                                [FAILED]
Starting NFS services:                                     [  OK  ]
Starting NFS quotas:                                       [  OK  ]
Starting NFS daemon:                                       [  OK  ]
Starting NFS mountd: Usage: rpc.mountd [-F|--foreground] [-h|--help]
[-v|--version] [-d kind|--debug kind]
	[-o num|--descriptors num] [-f
exports-file|--exports-file=file]
	[-p|--port port] [-V version|--nfs-version version]
	[-N version|--no-nfs-version version] [-n|--no-tcp]
	[-H ha-callout-prog] [-s|--state-directory-path path]
	[-t num|--num-threads=num]
                                                           [FAILED]
#

  on the other hand, if i re-comment just the V1 line:

# service nfs restart
Shutting down NFS mountd:                                  [FAILED]
Shutting down NFS daemon:                                  [  OK  ]
Shutting down NFS quotas:                                  [  OK  ]
Shutting down NFS services:                                [FAILED]
Starting NFS services:                                     [  OK  ]
Starting NFS quotas:                                       [  OK  ]
Starting NFS daemon:                                       [  OK  ]
Starting NFS mountd:                                       [  OK  ]
#

  now that's just silly, no?  i can start the mountd daemon as long as
i allow it to advertise NFSv1?

rday

-- 

========================================================================
Robert P. J. Day                               Waterloo, Ontario, CANADA

        Top-notch, inexpensive online Linux/OSS/kernel courses
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================


More information about the CentOS mailing list