I've been playing around with zones on NFS a bit and have run into
what looks to be a pretty bad snag - ZFS keeps seeing read and/or
checksum errors.  This exists with S10u8 and OpenSolaris dev build
snv_129.  This is likely a blocker for anything thinking of
implementing parts of Ed's Zones on Shared Storage:


The OpenSolaris example appears below.  The order of events is:

1) Create a file on NFS, turn it into a zpool
2) Configure a zone with the pool as zonepath
3) Install the zone, verify that the pool is healthy
4) Boot the zone, observe that the pool is sick

r...@soltrain19# mount filer:/path /mnt
r...@soltrain19# cd /mnt
r...@soltrain19# mkdir osolzone
r...@soltrain19# mkfile -n 8g root
r...@soltrain19# zpool create -m /zones/osol osol /mnt/osolzone/root
r...@soltrain19# zonecfg -z osol
osol: No such zone configured
Use 'create' to begin configuring a new zone.
zonecfg:osol> create
zonecfg:osol> info
zonename: osol
brand: ipkg
autoboot: false
ip-type: shared
zonecfg:osol> set zonepath=/zones/osol
zonecfg:osol> set autoboot=false
zonecfg:osol> verify
zonecfg:osol> commit
zonecfg:osol> exit

r...@soltrain19# chmod 700 /zones/osol
r...@soltrain19# zoneadm -z osol install
   Publisher: Using opensolaris.org (http://pkg.opensolaris.org/dev/
   Publisher: Using contrib (http://pkg.opensolaris.org/contrib/).
       Image: Preparing at /zones/osol/root.
       Cache: Using /var/pkg/download.
Sanity Check: Looking for 'entire' incorporation.
  Installing: Core System (output follows)
DOWNLOAD                                  PKGS       FILES    XFER (MB)
Completed                                46/46 12334/12334    93.1/93.1

PHASE                                        ACTIONS
Install Phase                            18277/18277
No updates necessary for this image.
  Installing: Additional Packages (output follows)
DOWNLOAD                                  PKGS       FILES    XFER (MB)
Completed                                36/36   3339/3339    21.3/21.3

PHASE                                        ACTIONS
Install Phase                              4466/4466

        Note: Man pages can be obtained by installing SUNWman
 Postinstall: Copying SMF seed repository ... done.
 Postinstall: Applying workarounds.
        Done: Installation completed in 2139.186 seconds.

  Next Steps: Boot the zone, then log into the zone console (zlogin -C)
              to complete the configuration process.
6.3     Boot the OpenSolaris zone
r...@soltrain19# zpool status osol
  pool: osol
 state: ONLINE
 scrub: none requested

        NAME                  STATE     READ WRITE CKSUM
        osol                  ONLINE       0     0     0
          /mnt/osolzone/root  ONLINE       0     0     0

errors: No known data errors

r...@soltrain19# zoneadm -z osol boot

r...@soltrain19# zpool status osol
  pool: osol
 state: DEGRADED
status: One or more devices has experienced an unrecoverable error.  An
        attempt was made to correct the error.  Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
        using 'zpool clear' or replace the device with 'zpool replace'.
   see: http://www.sun.com/msg/ZFS-8000-9P
 scrub: none requested

        NAME                  STATE     READ WRITE CKSUM
        osol                  DEGRADED     0     0     0
          /mnt/osolzone/root  DEGRADED     0     0   117  too many errors

errors: No known data errors

r...@soltrain19# zlogin osol uptime
  5:31pm  up 1 min(s),  0 users,  load average: 0.69, 0.38, 0.52

Mike Gerdts
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