iscsiadm常用命令：
# iscsiadm -m discovery -t st -p IP:port //發現iSCSI存儲
# iscsiadm -m node -o delete -T TARGET -p IP:port //刪除iSCSI發現記錄
# iscsiadm -m node //查看iSCSI發現記錄
# iscsiadm -m session //查看會話情況
# iscsiadm -m node -T TARGET -p IP:port -l //登錄iSCSI存儲
# iscsiadm -m node -T TARGET -p IP:port -u //登出iSCSI存儲
iSCSI客戶端操作：
[root@mysql51 ~]# iscsiadm -m discovery -t st -p 192.168.4.10 //發現iSCSI存儲
192.168.4.10:3260,1 iqn.2018-12.com.oven:master
[root@mysql51 ~]# iscsiadm -m node //查看iSCSI發現記錄
192.168.4.10:3260,1 iqn.2018-12.com.oven:master
[root@mysql51 ~]# iscsiadm -m session
iscsiadm: No active sessions.
刪除操作 ：# iscsiadm -m node -o delete -T iqn.2018-12.com.oven:master -p 192.168.4.10:3260
[root@mysql51 ~]# iscsiadm -m node -T iqn.2018-12.com.oven:master -p 192.168.4.10 -l //登錄iSCSI存儲。沒有添加認證，登錄失敗。
Logging in to [iface: default, target: iqn.2018-12.com.oven:master, portal: 192.168.4.10,3260] (multiple)
iscsiadm: Could not login to [iface: default, target: iqn.2018-12.com.oven:master, portal: 192.168.4.10,3260].
iscsiadm: initiator reported error (24 - iSCSI login failed due to authorization failure)
iscsiadm: Could not log into all portals
[root@mysql51 ~]# vim /etc/iscsi/initiatorname.iscsi //添加客戶端認證
InitiatorName=iqn.2018-12.com.oven:client //名稱與服務端acl設置的名稱一致
[root@mysql51 ~]# iscsiadm -m node -T iqn.2018-12.com.oven:master -p 192.168.4.10 -l //仍登錄失敗。因為未更新IQN
Logging in to [iface: default, target: iqn.2018-12.com.oven:master, portal: 192.168.4.10,3260] (multiple)
iscsiadm: Could not login to [iface: default, target: iqn.2018-12.com.oven:master, portal: 192.168.4.10,3260].
iscsiadm: initiator reported error (24 - iSCSI login failed due to authorization failure)
iscsiadm: Could not log into all portals
[root@mysql51 ~]# systemctl restart iscsid //更新IQN
[root@mysql51 ~]# iscsiadm -m node -T iqn.2018-12.com.oven:master -p 192.168.4.10 -l //更新IQN后登錄成功
Logging in to [iface: default, target: iqn.2018-12.com.oven:master, portal: 192.168.4.10,3260] (multiple)
Login to [iface: default, target: iqn.2018-12.com.oven:master, portal: 192.168.4.10,3260] successful.
[root@mysql51 ~]# iscsiadm -m node session //查看會話情況
192.168.4.10:3260,1 iqn.2018-12.com.oven:master
[root@mysql51 ~]# iscsiadm -m session -P 3 | grep -i attached // 驗證會話狀態
Attached SCSI devices:
Attached scsi disk sdb State: running