Centos 7安裝iscsi

搭建資料庫RAC環境，使用ISCSI服務模擬儲存伺服器，之前使用的是Linux 6系列所以發現7不同，特此記錄：

伺服器安裝targetcli

# yum -y install targetcli

啟動target服務

# systemctl start target

設定開機啟動服務

# systemctl enable target

開始建立

進入targetcli

#targetcli

步驟1：建立一個塊儲存

注意：server1.disk（名稱server1可自定義），/dev/sdb1為上面新建的分割槽名稱。

/backstores/fileio> /backstores/block create disk_ocr1 /dev/sdb

Created block storage object disk_ocr1 using /dev/sdb.

/backstores/fileio> /backstores/block create disk_ocr2 /dev/sdc

Created block storage object disk_ocr2 using /dev/sdc.

/backstores/fileio> /backstores/block create disk_ocr3 /dev/sdd

Created block storage object disk_ocr3 using /dev/sde.

/backstores/fileio> /backstores/block create disk_data1 /dev/sde

Created block storage object disk_data1 using /dev/sde.

/backstores/fileio> /backstores/block create disk_data2 /dev/sdf

Created block storage object disk_data2 using /dev/sdf.

/backstores/fileio> /backstores/block create disk_data3 /dev/sdg

Created block storage object disk_data3 using /dev/sdg.

/backstores/fileio> /backstores/block create disk_data4 /dev/sdh

Created block storage object disk_data4 using /dev/sdh.

步驟2：配置ISCSITarget命名

注意：命名在同一子網內確保是唯一的，命名格式為：iqn.yyyy-mm.<主機名反寫>:自定義名稱（自定義名稱內不能有下劃線）

/backstores/fileio> /iscsi create iqn.2019-04.com.rac18cc:server

Created target iqn.2019-04.com.rac18cc:server.

Created TPG 1.

Global pref auto_add_default_portal=true

Created default portal listening on all IPs (0.0.0.0), port 3260.

步驟3：建立ACL允許ISCSI客戶機連線

注意：iqn.2019-04.com.rac18cc:server:client1為客戶機ISCSI名稱。

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/acls create iqn.2019-04.com.rac18cc:beijing

Created Node ACL for iqn.2019-04.com.rac18cc:beijing

步驟4：建立lun（target塊裝置的邏輯單元）

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/luns create/backstores/block/disk_ocr1

Created LUN 0.

Created LUN 0->0 mapping in node ACL iqn.2019-04.com.rac18cc:beijing

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/luns create/backstores/block/disk_ocr2

Created LUN 1.

Created LUN 1->1 mapping in node ACL iqn.2019-04.com.rac18cc:beijing

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/luns create/backstores/block/disk_ocr3

Created LUN 2.

Created LUN 2->2 mapping in node ACL iqn.2019-04.com.rac18cc:beijing

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/luns create/backstores/block/disk_data1

Created LUN 3.

Created LUN 3->3 mapping in node ACL iqn.2019-04.com.rac18cc:beijing

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/luns create/backstores/block/disk_data2

Created LUN 4.

Created LUN 4->4 mapping in node ACL iqn.2019-04.com.rac18cc:beijing

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/luns create/backstores/block/disk_data3

Created LUN 5.

Created LUN 5->5 mapping in node ACL iqn.2019-04.com.rac18cc:beijing

/backstores/fileio> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/luns create/backstores/block/disk_data4

Created LUN 6.

Created LUN 6->6 mapping in node ACL iqn.2019-04.com.rac18cc:beijing

步驟5：建立ip與埠

/> /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/portals create 192.168.8.88

或

/>cd /iscsi/iqn.2019-04.com.rac18cc:server/tpg1/portals

/>create 192.168.8.88:3260

注：192.168.8.88為伺服器IP；不指定埠預設為3260

步驟6：配置驗證使用者名稱和密碼（這裡可以省略）

/>cd

/iscsi/iqn.2017-05.com.mwdserver:iscsimwd1/tpg1/acls/iqn.2017-05.com.mwdinit:initmwd1

/>set auth userid=test

/>set auth password=test

步驟7：配置完成後檢視配置資訊，並退出。

/>cd /

/>ls

/>exit

客戶端：

安裝：

# yum -y install iscsi-initiator-utils

注：Ubuntu下比較方便好用的initiator是open iscsi：

apt-get install -y open-iscsi

啟動iscsi服務：

# systemctl start iscsi

設定為開機自啟動服務：

# systemctl enable iscsi

配置ISCSIInitiator名稱（此處InitiatorName須與服務端配置的ACL允許ISCSI客戶機連線的名稱一致）：

# vi /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.1994-05.com.redhat:d36e6c6eb661

修改為：

InitiatorName=iqn.2019-04.com.rac18cc:beijing

此處定義的Initiator名字要和在儲存節點中定義ACL時使用的主機名字一致。

#vi /etc/iscsi/iscsid.conf

# line 57: 取消註釋

node.session.auth.authmethod = CHAP

# line 61,62: 取消註釋 and specify the username and password you set on the iSCSI target server

node.session.auth.username = username

node.session.auth.password = password

# 發現target

[root@rac18c1 ~]# iscsiadm -m discovery -t sendtargets -p 192.168.8.88

192.168.8.88:3260,1 iqn.2019-04.com.rac18cc:server

[root@rac18c1 ~]# iscsiadm -m node -o show

# BEGIN RECORD 6.2.0.874-10

node.name = iqn.2019-04.com.rac18cc:server

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.gateway = <empty>

iface.subnet_mask = <empty>

iface.transport_name = tcp

iface.initiatorname = <empty>

iface.state = <empty>

iface.vlan_id = 0

iface.vlan_priority = 0

iface.vlan_state = <empty>

iface.iface_num = 0

iface.mtu = 0

iface.port = 0

iface.bootproto = <empty>

iface.dhcp_alt_client_id_state = <empty>

iface.dhcp_alt_client_id = <empty>

iface.dhcp_dns = <empty>

iface.dhcp_learn_iqn = <empty>

iface.dhcp_req_vendor_id_state = <empty>

iface.dhcp_vendor_id_state = <empty>

iface.dhcp_vendor_id = <empty>

iface.dhcp_slp_da = <empty>

iface.fragmentation = <empty>

iface.gratuitous_arp = <empty>

iface.incoming_forwarding = <empty>

iface.tos_state = <empty>

iface.tos = 0

iface.ttl = 0

iface.delayed_ack = <empty>

iface.tcp_nagle = <empty>

iface.tcp_wsf_state = <empty>

iface.tcp_wsf = 0

iface.tcp_timer_scale = 0

iface.tcp_timestamp = <empty>

iface.redirect = <empty>

iface.def_task_mgmt_timeout = 0

iface.header_digest = <empty>

iface.data_digest = <empty>

iface.immediate_data = <empty>

iface.initial_r2t = <empty>

iface.data_seq_inorder = <empty>

iface.data_pdu_inorder = <empty>

iface.erl = 0

iface.max_receive_data_len = 0

iface.first_burst_len = 0

iface.max_outstanding_r2t = 0

iface.max_burst_len = 0

iface.chap_auth = <empty>

iface.bidi_chap = <empty>

iface.strict_login_compliance = <empty>

iface.discovery_auth = <empty>

iface.discovery_logout = <empty>

node.discovery_address = 192.168.8.88

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 = <empty>

node.session.auth.password = <empty>

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.session.scan = auto

node.conn[0].address = 192.168.8.88

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

連線ISCSI裝置：

 iscsiadm -m node --login

 # cat /proc/partitions 

# iscsiadm --mode node --targetname iqn.2019-04.com.rac18cc:server --portal 192.168.8.88 --login