Kool Aid Served Daily

So last night I reinstalled Nevada b35 on wont. Of course, I didn't bother nuking my ZFS filesystem. And of course it did not show up after the system came up. But that is the same as a UFS filesystem. For UFS you need to add it to /etc/vfstab to get it mounted automatically upon a reboot.

What do I need to do with a ZFS filesystem?

• Let's find it first:

  # zpool import
    pool: zoo
      id: 6577446991347315550
   state: ONLINE
  action: The pool can be imported using its name or numeric identifier.  The
          pool may be active on on another system, but can be imported using
          the '-f' flag.
  config:
  
          zoo         ONLINE
            mirror    ONLINE
              c0d1s0  ONLINE
              c0d1s1  ONLINE
            mirror    ONLINE
              c0d1s3  ONLINE
              c0d1s4  ONLINE
  

• And now lets import it:

  # zpool import zoo
  cannot import 'zoo': pool may be in use from other system
  use '-f' to import anyway
  # zpool import -f zoo
  cannot mount 'zoo/home/nfsv2': mountpoint or dataset is busy
  

• And lets verify that we can see it:

  # df -h
  Filesystem             size   used  avail capacity  Mounted on
  /dev/dsk/c0d0s0         30G   4.3G    25G    15%    /
  /devices                 0K     0K     0K     0%    /devices
  ctfs                     0K     0K     0K     0%    /system/contract
  proc                     0K     0K     0K     0%    /proc
  mnttab                   0K     0K     0K     0%    /etc/mnttab
  swap                   1.5G   716K   1.5G     1%    /etc/svc/volatile
  objfs                    0K     0K     0K     0%    /system/object
  /usr/lib/libc/libc_hwcap2.so.1
                          30G   4.3G    25G    15%    /lib/libc.so.1
  fd                       0K     0K     0K     0%    /dev/fd
  swap                   1.5G   108K   1.5G     1%    /tmp
  swap                   1.5G    44K   1.5G     1%    /var/run
  /dev/dsk/c0d0s7        5.7G   5.8M   5.6G     1%    /export/home
  /vol/dev/dsk/c1t0d0/"kanigixx86"
                         2.8G   2.8G     0K   100%    /cdrom/"kanigixx86"
  zoo                    134G   100K   128G     1%    /zoo
  zoo/x86                134G   2.8G   128G     3%    /zoo/x86
  zoo/home                10G   100K  10.0G     1%    /export/zfs
  zoo/home/nfsv2          10G    98K  10.0G     1%    /export/zfs/nfsv2
  zoo/home/tdh            10G    98K  10.0G     1%    /export/zfs/tdh
  zoo/home/nfsv3          10G    98K  10.0G     1%    /export/zfs/nfsv3
  zoo/home/nfsv4          10G   108K  10.0G     1%    /export/zfs/nfsv4
  zoo/isos               134G   2.8G   128G     3%    /zoo/isos
  

No idea why 'zfs import -f zoo' spit out a warning. Well, it might have to do with the fact that I didn't do a 'zfs export' before I did the reinstall.

And finally, lets make sure we can see the contents across the network on sandman:

# showmount -e wont
export list for wont:
/export/zfs       (everyone)
/export/zfs/tdh   (everyone)
/export/zfs/nfsv3 (everyone)
/export/zfs/nfsv4 (everyone)
/export/zfs/nfsv2 (everyone)
# cd /net/wont/export
# ls -la
total 3
dr-xr-xr-x   2 root     root           2 Mar 21 15:36 .
dr-xr-xr-x   2 root     root           2 Mar 21 15:36 ..
dr-xr-xr-x   1 root     root           1 Mar 21 15:36 zfs
# cd zfs
# ls -la
total 7
drwxr-xr-x   6 root     sys            6 Mar 20 23:12 .
dr-xr-xr-x   2 root     root           2 Mar 21 15:36 ..
dr-xr-xr-x   3 root     root           3 Mar 21 15:35 .zfs
dr-xr-xr-x   1 root     root           1 Mar 21 15:36 nfsv2
dr-xr-xr-x   1 root     root           1 Mar 21 15:36 nfsv3
dr-xr-xr-x   1 root     root           1 Mar 21 15:36 nfsv4
dr-xr-xr-x   1 root     root           1 Mar 21 15:36 tdh
# cd tdh
# ls -la
total 4
drwxr-xr-x   2 1066     staff          2 Mar 20 23:12 .
drwxr-xr-x   6 root     sys            6 Mar 20 23:12 ..
dr-xr-xr-x   3 root     root           3 Mar 21 15:36 .zfs

Obviously, the userid of 1066 has not been added to sandman. Notice that this is a NFSv4 mount and the ID mapping must be working correctly. I.e., if it were not, we would see nobody. A NFSv3 mount would show 1066 regardless of the ID domain settings.