ZFS and iSCSI

I was asked to share out the pool on the X4500 via NFS and iSCIS. NFS I was familiar with, and have used a fair amount. iSCSI for all its new hotness factor, I’ve never touched.

I was unsurprised, but pleased, with how trivial it is to set up. On the server (the target):

x4500# zfs create tank/iscsi
x4500# zfs set shareiscsi=on tank/iscsi
x4500# zfs create -s -V 25g tank/iscsi/vol001
x4500# zfs create -s -V 25g tank/iscsi/vol002
x4500# zfs create -s -V 25g tank/iscsi/vol003
x4500# zfs create -s -V 25g tank/iscsi/vol004
x4500# zfs create -s -V 25g tank/iscsi/vol005
x4500# zfs create -s -V 25g tank/iscsi/vol006
x4500# zfs list tank
tank                      1.39G  13.3T  53.3K  /tank
tank/iscsi                1.54M  13.3T  44.8K  /tank/iscsi
tank/iscsi/vol001          246K  13.3T   246K  -
tank/iscsi/vol002          246K  13.3T   246K  -
tank/iscsi/vol003          247K  13.3T   247K  -
tank/iscsi/vol004          262K  13.3T   262K  -
tank/iscsi/vol005          263K  13.3T   263K  -
tank/iscsi/vol006          264K  13.3T   264K  -
tank/nfs                  1.39G  13.3T  1.39G  /tank/nfs

This will start the iSCSI service (iscsigtd) and share not only the parent volume (tank/iscsi) but all the children as well.

Accessing and using the disks on the client (the initiator) is just as easy:

client# iscsiadm modify discovery --sendtargets enable
client# iscsiadm add discovery-address 10.0.100.40
client# svcadm enable initiator
client# iscsiadm list target
Target: iqn.1986-03.com.sun:02:7ea6450a-4a26-cfe5-d679-fe0dbabe66b9
        Alias: tank/iscsi/vol001
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:61d314ce-f4b3-ed1f-9891-e0c6c52f5601
        Alias: tank/iscsi/vol002
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:eaea5a32-f54a-6d04-a453-888a580504c2
        Alias: tank/iscsi/vol003
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:05272769-bd4a-6b54-8d6f-f525af20ad08
        Alias: tank/iscsi/vol004
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:fb296689-109e-cb6d-9515-a07f581a81ce
        Alias: tank/iscsi/vol005
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:ec71ac8e-e417-ce3f-891c-ee1febdf9120
        Alias: tank/iscsi/vol006
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1
client# format < /dev/null
Searching for disks...done
AVAILABLE DISK SELECTIONS:
       0. c0d0 <DEFAULT cyl 4174 alt 2 hd 255 sec 63>
          /pci@0,0/pci-ide@1,1/ide@0/cmdk@0,0
       1. c1t600144F04B66BAA30000144F21056400d0 <DEFAULT cyl 3261 alt 2 hd 255 sec 63>
          /scsi_vhci/disk@g600144f04b66baa30000144f21056400
       2. c1t600144F04B66BAA40000144F21056400d0 <DEFAULT cyl 3261 alt 2 hd 255 sec 63>
          /scsi_vhci/disk@g600144f04b66baa40000144f21056400
       3. c1t600144F04B66BAA50000144F21056400d0 <DEFAULT cyl 3261 alt 2 hd 255 sec 63>
          /scsi_vhci/disk@g600144f04b66baa50000144f21056400
       4. c1t600144F04B66BAA60000144F21056400d0 <DEFAULT cyl 3261 alt 2 hd 255 sec 63>
          /scsi_vhci/disk@g600144f04b66baa60000144f21056400
       5. c1t600144F04B66BAA80000144F21056400d0 <DEFAULT cyl 3261 alt 2 hd 255 sec 63>
          /scsi_vhci/disk@g600144f04b66baa80000144f21056400
       6. c1t600144F04B66BAA90000144F21056400d0 <DEFAULT cyl 3261 alt 2 hd 255 sec 63>
          /scsi_vhci/disk@g600144f04b66baa90000144f21056400

client# zpool create tank \
raidz c1t600144F04B66BAA30000144F21056400d0 c1t600144F04B66BAA40000144F21056400d0 c1t600144F04B66BAA50000144F21056400d0 \
raidz c1t600144F04B66BAA60000144F21056400d0 c1t600144F04B66BAA80000144F21056400d0 c1t600144F04B66BAA90000144F21056400d0
client#  zpool status -v tank
  pool: tank
 state: ONLINE
 scrub: none requested
config:

        NAME                                       STATE     READ WRITE CKSUM
        tank                                       ONLINE       0     0     0
          raidz1                                   ONLINE       0     0     0
            c1t600144F04B66BAA30000144F21056400d0  ONLINE       0     0     0
            c1t600144F04B66BAA40000144F21056400d0  ONLINE       0     0     0
            c1t600144F04B66BAA50000144F21056400d0  ONLINE       0     0     0
          raidz1                                   ONLINE       0     0     0
            c1t600144F04B66BAA60000144F21056400d0  ONLINE       0     0     0
            c1t600144F04B66BAA80000144F21056400d0  ONLINE       0     0     0
            c1t600144F04B66BAA90000144F21056400d0  ONLINE       0     0     0

errors: No known data errors

Very nice.

Posted Monday, February 1st, at 6:42 AM (∞).
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