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iSCSIイニシエータの設定
2012/06/05
 
iSCSIイニシエータの設定です。ここの例で前提としている環境は以下の通りです。
 
dlp.srv.world
[10.0.0.30] - iSCSIターゲット

 
www.srv.world
[10.0.0.31] - iSCSIイニシエータ
[1] iSCSIイニシエータの設定
[root@www ~]#
yum -y install iscsi-initiator-utils
[root@www ~]#
vi /etc/iscsi/iscsid.conf
# 53行目:コメント解除

node.session.auth.authmethod = CHAP
# 57,58行目:コメント解除してiSCSIターゲットで設定したユーザー名とパスワードを設定

node.session.auth.username =
username

node.session.auth.password =
password
# ターゲットを discovery する

[root@www ~]#
iscsiadm -m discovery -t sendtargets -p 10.0.0.30

Starting iscsid: [  159.142006] Loading iSCSI transport class v2.0-870.
[  159.154392] iscsi: registered transport (tcp)
[  159.194273] iscsi: registered transport (iser)
[  159.219007] libcxgbi:libcxgbi_init_module: tag itt 0x1fff, 13 bits, age 0xf, 4 bits.
[  159.219713] libcxgbi:ddp_setup_host_page_size: system PAGE 4096, ddp idx 0.
[  159.236976] Chelsio T3 iSCSI Driver cxgb3i v2.0.0 (Jun. 2010)
[  159.237519] iscsi: registered transport (cxgb3i)
[  159.245287] Chelsio T4 iSCSI Driver cxgb4i v0.9.1 (Aug. 2010)
[  159.246059] iscsi: registered transport (cxgb4i)
[  159.262520] cnic: Broadcom NetXtreme II CNIC Driver cnic v2.5.8 (Jan 3, 2012)
[  159.265733] Broadcom NetXtreme II iSCSI Driver bnx2i v2.7.0.3 (Jun 15, 2011)
[  159.266376] iscsi: registered transport (bnx2i)
[  159.276785] iscsi: registered transport (be2iscsi)
[  OK  ]
10.0.0.30:3260,1 iqn.2012-06.world.srv:target00

[root@www ~]#
chkconfig iscsi on

[root@www ~]#
chkconfig iscsid on
# discovery した後の状態確認

[root@www ~]#
iscsiadm -m node -o show

# BEGIN RECORD 2.0-872.18.f17
node.name = iqn.2012-06.world.srv:target00
node.tpgt = 1
node.startup = automatic
node.leading_login = No
iface.hwaddress = <empty>
iface.ipaddress = <empty>
iface.iscsi_ifacename = default
iface.net_ifacename = <empty>
iface.transport_name = tcp
iface.initiatorname = <empty>
node.discovery_address = 10.0.0.30
node.discovery_port = 3260
node.discovery_type = send_targets
node.session.initial_cmdsn = 0
node.session.initial_login_retry_max = 8
node.session.xmit_thread_priority = -20
node.session.cmds_max = 128
node.session.queue_depth = 32
node.session.nr_sessions = 1
node.session.auth.authmethod = CHAP
node.session.auth.username = username
node.session.auth.password = ********
node.session.auth.username_in = <empty>
node.session.auth.password_in = <empty>
node.session.timeo.replacement_timeout = 120
node.session.err_timeo.abort_timeout = 15
node.session.err_timeo.lu_reset_timeout = 30
node.session.err_timeo.tgt_reset_timeout = 30
node.session.err_timeo.host_reset_timeout = 60
node.session.iscsi.FastAbort = Yes
node.session.iscsi.InitialR2T = No
node.session.iscsi.ImmediateData = Yes
node.session.iscsi.FirstBurstLength = 262144
node.session.iscsi.MaxBurstLength = 16776192
node.session.iscsi.DefaultTime2Retain = 0
node.session.iscsi.DefaultTime2Wait = 2
node.session.iscsi.MaxConnections = 1
node.session.iscsi.MaxOutstandingR2T = 1
node.session.iscsi.ERL = 0
node.conn[0].address = 10.0.0.30
node.conn[0].port = 3260
node.conn[0].startup = manual
node.conn[0].tcp.window_size = 524288
node.conn[0].tcp.type_of_service = 0
node.conn[0].timeo.logout_timeout = 15
node.conn[0].timeo.login_timeout = 15
node.conn[0].timeo.auth_timeout = 45
node.conn[0].timeo.noop_out_interval = 5
node.conn[0].timeo.noop_out_timeout = 5
node.conn[0].iscsi.MaxXmitDataSegmentLength = 0
node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144
node.conn[0].iscsi.HeaderDigest = None
node.conn[0].iscsi.IFMarker = No
node.conn[0].iscsi.OFMarker = No
# END RECORD

# discovery したターゲットにログインする

[root@www ~]#
iscsiadm -m node --login

Logging in to [iface: default, target: iqn.2012-06.world.srv:target00, portal: 10.0.0.30,3260] (multiple)
[  446.380280] scsi2 : iSCSI Initiator over TCP/IP
[  447.387602] scsi 2:0:0:0: RAID              IET      Controller       0001 PQ: 0 ANSI: 5
[  447.388599] scsi 2:0:0:0: Attached scsi generic sg0 type 12
[  447.390206] scsi 2:0:0:1: Direct-Access     IET      VIRTUAL-DISK     0001 PQ: 0 ANSI: 5
[  447.391188] sd 2:0:0:1: Attached scsi generic sg1 type 0
Login to [iface: default, target: iqn.2012-06.world.srv:target00, portal: 10.0.0.30,3260] successful.
[root@www ~]# [  447.393905] sd 2:0:0:1: [sda] 16777216 512-byte logical blocks: (8.58 GB/8.00 GiB)
[  447.395980] sd 2:0:0:1: [sda] Write Protect is off
[  447.397143] sd 2:0:0:1: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  447.415314]  sda: unknown partition table
[  447.417907] sd 2:0:0:1: [sda] Attached SCSI disk

# 確立しているセッションを確認

[root@www ~]#
iscsiadm -m session -o show

tcp: [1] 10.0.0.30:3260,1 iqn.2012-06.world.srv:target00
# パーティションを確認してみる

[root@www ~]#
cat /proc/partitions

major minor #blocks name
8
0
31457280
sda

8
1
512000
sda1

8
2
30944256
sda2

253
0
20971520
dm-0

253
1
6160384
dm-1

253
2
3809280
dm-2

8
16
83886080
sdb
# ターゲット提供のデバイスが新たに認識されている

[2]
以上でiSCSIイニシエータの設定は終了です。 後はマウントしたデバイスをネットワークストレージをローカルストレージのように扱うことができます。

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