On Wed, Aug 17, 2011 at 02:53:48PM -0000, exa wrote:
> I've now checked my nfs-common config, it had the following relevant
> bits:

> # Do you want to start the statd daemon? It is not needed for NFSv4.
> NEED_STATD=yes
> ...
> # Do you want to start the idmapd daemon? It is only needed for NFSv4.
> NEED_IDMAPD=yes

Ok.

> GSSD is turned off by default, and I hope it has nothing to do with this
> bug.

Yes, gssd is unrelated unless you are using sec=krb5* mount options.

> For testing purposes I'm using a single NFS4 export line (but it fails with 
> any config, that is not relevant):
> /exports      *(ro,fsid=0,no_subtree_check,async)

> After this point I restarted nfs server, and the mount still failed to
> produce correct uid/gid values, but then....

> So, well, does idmapd run? Yes, I've checked:
> examachine@cylon:~$ ps aux | grep idmap
> 1000     32731  0.0  0.0  13124  1060 pts/3    S+   17:31   0:00 grep 
> --color=auto idmap
> examachine@cylon:~$ sudo start idmapd
> start: Job is already running: idmapd
> examachine@cylon:~$ ps aux | grep idmap
> root       622  0.0  0.0  27336   888 ?        Ss   17:35   0:00 rpc.idmapd
> 1000      2038  0.0  0.0  13128  1060 pts/3    S+   17:47   0:00 grep 
> --color=auto idmap

Is this on the client or server?

The above output doesn't make sense to me.  First you show ps output with no
idmapd running; then you show the output of a 'start' command that reports
that it's already running; then it appears in the ps output.  None of these
things follow from one another.

It may be that you're encountering a bug in the startup of idmapd at boot,
unrelated to this bug report.  There is an SRU awaiting verification for
precisely such an issue: bug #811823.

> However, AFTER the above command, strangely, idmapd suddenly starts
> giving the right behavior, could it be a permissions  or locking problem
> or something trivial like that? Or starting idmapd only if nfs I believe
> I'm using the desktop installation.

As mentioned, idmapd will not start up automatically if it doesn't detect
that it's needed.  When it declines to start for this reason, the upstart
job will be left in 'stopped' state.  So it should be enough to edit the
config file and run 'service idmapd start' once to fix the problem.

> Ok, the problem might be with the logic that looks at whether nfs4
> entries are present on the fstab. I might want to mount them from the
> command line, etc, and I shouldn't have to start daemons manually to
> make that happen.

Yes, that's the bit here that I've confirmed is a bug in nfs-utils.

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slanga...@ubuntu.com                                     vor...@debian.org

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/662711

Title:
  idmap should be started by default because mount.nfs now negotiates
  NFSv4 before NFSv3

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/662711/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to