這篇文章主要講解了“Centos7怎么安裝iscsi”，文中的講解內(nèi)容簡(jiǎn)單清晰，易于學(xué)習(xí)與理解，下面請(qǐng)大家跟著小編的思路慢慢深入，一起來(lái)研究和學(xué)習(xí)“Centos7怎么安裝iscsi”吧！

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搭建數(shù)據(jù)庫(kù)RAC環(huán)境，使用ISCSI服務(wù)模擬存儲(chǔ)服務(wù)器，之前使用的是Linux 6系列所以發(fā)現(xiàn)7不同，特此記錄：

服務(wù)器安裝targetcli

# yum -y install targetcli

啟動(dòng)target服務(wù)

# systemctl start target

設(shè)置開(kāi)機(jī)啟動(dòng)服務(wù)

# systemctl enable target

開(kāi)始創(chuàng)建

進(jìn)入targetcli

#targetcli

步驟1：建立一個(gè)塊存儲(chǔ)

注意：server1.disk（名稱server1可自定義），/dev/sdb1為上面新建的分區(qū)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(wǎng)內(nèi)確保是唯一的，命名格式為：iqn.yyyy-mm.<主機(jī)名反寫(xiě)>:自定義名稱（自定義名稱內(nèi)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：創(chuàng)建ACL允許ISCSI客戶機(jī)連接

注意：iqn.2019-04.com.rac18cc:server:client1為客戶機(jī)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：創(chuàng)建lun（target塊設(shè)備的邏輯單元）

/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：創(chuàng)建ip與端口

/> /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為服務(wù)器IP；不指定端口默認(rèn)為3260

步驟6：配置驗(yàn)證用戶名和密碼（這里可以省略）

/>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：配置完成后查看配置信息，并退出。

/>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(dòng)iscsi服務(wù)：

# systemctl start iscsi

設(shè)置為開(kāi)機(jī)自啟動(dòng)服務(wù)：

# systemctl enable iscsi

配置ISCSIInitiator名稱（此處InitiatorName須與服務(wù)端配置的ACL允許ISCSI客戶機(jī)連接的名稱一致）：

# 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名字要和在存儲(chǔ)節(jié)點(diǎn)中定義ACL時(shí)使用的主機(jī)名字一致。

#vi /etc/iscsi/iscsid.conf

# line 57: 取消注釋

node.session.auth.authmethod = CHAP

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

node.session.auth.username = username

node.session.auth.password = password

# 發(fā)現(xiàn)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

連接ISCSI設(shè)備：

 iscsiadm -m node --login

 # cat /proc/partitions 

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

感謝各位的閱讀，以上就是“Centos7怎么安裝iscsi”的內(nèi)容了，經(jīng)過(guò)本文的學(xué)習(xí)后，相信大家對(duì)Centos7怎么安裝iscsi這一問(wèn)題有了更深刻的體會(huì)，具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是創(chuàng)新互聯(lián)，小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章，歡迎關(guān)注！

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