Re: [gentoo-user] NFS mount not properly unmounting during shutdown/reboot

[Tanstaafl <tanstaafl@libertytrek.org>]

On 2013-06-10 6:38 AM, Alan McKinnon <alan.mckinnon@gmail.com> wrote:
> On 10/06/2013 12:34, Tanstaafl wrote:
>> If I remember to manually unmount the NFS mount before initiating the
>> reboot/shutdown, it doesn't hang.
>>
>> I'm guessing that it hangs at /var because it is the last mountpoint
>> defined in my /etc/fstab?
>>
>> So... any pointers on where to look for a resolution would be appreciated.
>>
>> Resolution being, if I can manually unmount it fine, why can't the
>> system auto-unmount it?

> Let's get some facts to work with
>
> can you post your fstab,

Fyi, I don't have either of these auto-mounting in fstab, but here it is:

# <fs>             <mountpoint>    <type>           <opts>   <dump/pass>

# NOTE: If your BOOT partition is ReiserFS, add the notail option to
# opts.
/dev/sda1           /boot           ext2            noauto,noatime  1 2
/dev/sda2           none            swap            sw              0 0
/dev/sda3           /               ext3            noatime         0 1
/dev/sda4           /backups        ext3            noatime         0 2
/dev/vg2/home       /home           reiserfs        noatime         0 0
/dev/vg2/usr        /usr            reiserfs        noatime         0 0
/dev/vg2/var        /var            reiserfs        noatime         0 0
/dev/cdroms/cdrom0  /mnt/cdrom      iso9660         noauto,ro       0 0
/dev/fd0            /mnt/floppy     auto            noauto          0 0

# NOTE: The next line is critical for boot!
none                /proc           proc            defaults        0 0

# glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
# POSIX shared memory (shm_open, shm_unlink).
# (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
#  use almost no memory if not populated with files)
shm                 /dev/shm        tmpfs      nodev,nosuid,noexec  0 0

> rc-update show,

  # rc-update show
               apache2 |      default
              bootmisc | boot
           consolefont | boot
                 devfs |                                        sysinit
         device-mapper | boot
                 dmesg |                                        sysinit
               dovecot |      default
                  fsck | boot
              hostname | boot
               hwclock | boot
              iptables |      default
               keymaps | boot
             killprocs |                        shutdown
                 local |      default nonetwork
            localmount | boot
                   lvm | boot
               mailman |      default
               modules | boot
              mount-ro |                        shutdown
                  mtab | boot
                 mysql |      default
              net.eth0 |      default
                net.lo | boot
              netmount |      default
            ntp-client |      default
                  ntpd |      default
               postfix |      default
                procfs | boot
                  root | boot
               rpcbind |      default
             savecache |                        shutdown
                  sshd |      default
                  swap | boot
             swapfiles | boot
                sysctl | boot
                 sysfs |                                        sysinit
             syslog-ng |      default
          termencoding | boot
        tmpfiles.setup | boot
                  udev |                                        sysinit
            udev-mount |                                        sysinit
        udev-postmount |      default
               urandom | boot
            vixie-cron |      default
                xinetd |      default


> /etc/exports on the NFS server

Well... there is no 'NFS Server', these are two QNAP boxes that I can 
enable NFS on... I guess there may be a way to command-line into them to 
check that, so if it critical to answering the question, I'll see what I 
can do. All I know for sure is, if I manually unmount it with umount 
/mnt/qnap-mountpoint, it unmounts immediately.

> and the mount options used for the NFS mounts?

The command I use to mount it is:

mount -t nfs -o mountproto=tcp qnap1:/backups /mnt/qnap1

Thanks Alan, hopefully something jumps out at you...