环境准备
1 1、服务器添加硬盘，并做Raid 2 [root@iscsi-server ~]# lsblk 3 #查看磁盘挂载情况 4 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT 5 sda 8:0 0 8G 0 disk 6 ├─sda1 8:1 0 1G 0 part /boot 7 └─sda2 8:2 0 7G 0 part 8 ├─centos-root 253:0 0 6.2G 0 lvm / 9 └─centos-swap 253:1 0 820M 0 lvm [SWAP] 10 sdb 8:16 0 2G 0 disk 11 sdc 8:32 0 2G 0 disk 12 sdd 8:48 0 2G 0 disk 13 sde 8:64 0 2G 0 disk 14 sdf 8:80 0 2G 0 disk 15 sr0 11:0 1 1024M 0 rom 16 [root@iscsi-server ~]# yum install mdadm -y >> /etc/null 17 [root@iscsi-server ~]# mdadm -C /dev/md0 -l5 -n4 -x1 /dev/sd{b,c,d,e,f} 18 #新建Raid，设备/dev/md0，Raid5，4块数据盘，一块热备盘 19 mdadm: Defaulting to version 1.2 metadata 20 mdadm: array /dev/md0 started. 21 [root@iscsi-server ~]# lsblk 22 #验证 23 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT 24 sda 8:0 0 8G 0 disk 25 ├─sda1 8:1 0 1G 0 part /boot 26 └─sda2 8:2 0 7G 0 part 27 ├─centos-root 253:0 0 6.2G 0 lvm / 28 └─centos-swap 253:1 0 820M 0 lvm [SWAP] 29 sdb 8:16 0 2G 0 disk 30 └─md0 9:0 0 6G 0 raid5 31 sdc 8:32 0 2G 0 disk 32 └─md0 9:0 0 6G 0 raid5 33 sdd 8:48 0 2G 0 disk 34 └─md0 9:0 0 6G 0 raid5 35 sde 8:64 0 2G 0 disk 36 └─md0 9:0 0 6G 0 raid5 37 sdf 8:80 0 2G 0 disk 38 └─md0 9:0 0 6G 0 raid5 39 sr0 11:0 1 1024M 0 rom 40 [root@iscsi-server ~]#
ISCSI服务器
1 [root@iscsi-server ~]# yum install targetcli -y >> /dev/null 2 [root@iscsi-server ~]# targetcli 3 Warning: Could not load preferences file /root/.targetcli/prefs.bin. 4 targetcli shell version 2.1.51 5 Copyright 2011-2013 by Datera, Inc and others. 6 For help on commands, type 'help'. 7 8 /> ls 9 o- / .......................................................................... [...] 10 o- backstores ............................................................... [...] 11 | o- block ................................................... [Storage Objects: 0] 12 | o- fileio .................................................. [Storage Objects: 0] 13 | o- pscsi ................................................... [Storage Objects: 0] 14 | o- ramdisk ................................................. [Storage Objects: 0] 15 o- iscsi ............................................................. [Targets: 0] 16 o- loopback .......................................................... [Targets: 0] 17 /> /backstores/block create iscsi_test /dev/md0 18 Created block storage object iscsi_test using /dev/md0. 19 /> /iscsi create iqn.2020-12.com.test 20 Created target iqn.2020-12.com.test. 21 Created TPG 1. 22 Global pref auto_add_default_portal=true 23 Created default portal listening on all IPs (0.0.0.0), port 3260. 24 /> cd /iscsi/iqn.2020-12.com.test/tpg1/ 25 /iscsi/iqn.20...com.test/tpg1> ls 26 o- tpg1 ...................................................... [no-gen-acls, no-auth] 27 o- acls ................................................................. [ACLs: 0] 28 o- luns ................................................................. [LUNs: 0] 29 o- portals ........................................................... [Portals: 1] 30 o- 0.0.0.0:3260 ............................................................ [OK] 31 /iscsi/iqn.20...com.test/tpg1> acls/ create iqn.2020-12.com.test:192.168.1.92 32 Created Node ACL for iqn.2020-12.com.test:192.168.1.92 33 /iscsi/iqn.20...com.test/tpg1> luns/ create /backstores/block/iscsi_test 34 Created LUN 0. 35 Created LUN 0->0 mapping in node ACL iqn.2020-12.com.test:192.168.1.92 36 /iscsi/iqn.20...com.test/tpg1> portals/ delete ip_address=0.0.0.0 ip_port=3260 37 Deleted network portal 0.0.0.0:3260 38 /iscsi/iqn.20...com.test/tpg1> portals/ create ip_address=192.168.1.91 ip_port=3260 39 Using default IP port 3260 40 Created network portal 192.168.1.91:3260. 41 /iscsi/iqn.20...com.test/tpg1> cd / 42 /> ls 43 o- / .............................................................................. [...] 44 o- backstores ................................................................... [...] 45 | o- block ....................................................... [Storage Objects: 1] 46 | | o- iscsi_test ............................ [/dev/md0 (6.0GiB) write-thru activated] 47 | | o- alua ........................................................ [ALUA Groups: 1] 48 | | o- default_tg_pt_gp ............................ [ALUA state: Active/optimized] 49 | o- fileio ...................................................... [Storage Objects: 0] 50 | o- pscsi ....................................................... [Storage Objects: 0] 51 | o- ramdisk ..................................................... [Storage Objects: 0] 52 o- iscsi ................................................................. [Targets: 1] 53 | o- iqn.2020-12.com.test ................................................... [TPGs: 1] 54 | o- tpg1 .................................................... [no-gen-acls, no-auth] 55 | o- acls ............................................................... [ACLs: 1] 56 | | o- iqn.2020-12.com.test:192.168.1.92 ......................... [Mapped LUNs: 1] 57 | | o- mapped_lun0 ................................. [lun0 block/iscsi_test (rw)] 58 | o- luns ............................................................... [LUNs: 1] 59 | | o- lun0 ...................... [block/iscsi_test (/dev/md0) (default_tg_pt_gp)] 60 | o- portals ......................................................... [Portals: 1] 61 | o- 192.168.1.91:3260 ..................................................... [OK] 62 o- loopback .............................................................. [Targets: 0] 63 /> exit 64 Global pref auto_save_on_exit=true 65 Last 10 configs saved in /etc/target/backup/. 66 Configuration saved to /etc/target/saveconfig.json 67 [root@iscsi-server ~]# firewall-cmd --add-port=3260/tcp 68 success 69 [root@iscsi-server ~]# firewall-cmd --add-port=3260/tcp --permanent 70 success 71 [root@iscsi-server ~]# systemctl restart target 72 [root@iscsi-server ~]# systemctl enable target
ISCSI客户端
[root@iscsi-client ~]# yum install iscsi* -y >> /dev/null [root@iscsi-client ~]# vim /etc/iscsi/initiatorname.iscsi InitiatorName=iqn.2020-12.com.test:192.168.1.92 [root@iscsi-client ~]# systemctl start iscsid [root@iscsi-client ~]# iscsiadm -m discovery -t st -p 192.168.1.91 192.168.1.91:3260,1 iqn.2020-12.com.test [root@iscsi-client ~]# iscsiadm -m node -T iqn.2020-12.com.test -p 192.168.1.91 -l Logging in to [iface: default, target: iqn.2020-12.com.test, portal: 192.168.1.91,32multiple) Login to [iface: default, target: iqn.2020-12.com.test, portal: 192.168.1.91,3260] ssful. [root@iscsi-client ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 8G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 7G 0 part ├─centos-root 253:0 0 6.2G 0 lvm / └─centos-swap 253:1 0 820M 0 lvm [SWAP] sdb 8:16 0 6G 0 disk sr0 11:0 1 1024M 0 rom [root@iscsi-client ~]# 退出登录：iscsiadm -m node -T iscsi名称 -p 服务器ip -u(如果有多组，退出指定组) iscsiadm -m node --logoutall=all / iscsiadm -m node -u ALL（两个均为注销所有链接） 如本测验：iscsiadm -m node -T iqn.2020-12.com.disk -p 192.168.1.103 -u 注销只是相当于退出登录，重启后共享存储又存在了，所以需要删除存储硬盘： 删除所有：iscsiadm -m node -o delete 删除指定组：iscsiadm -m node -T iscsi名称 -p 服务器ip -o delete
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