How to Create or Configure iSCSI Server and Clinet

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Server: server.example.com

IP Address: 192.168.122.246

OS: CentOS 7.9

Client: client.example.com

IP Address: 192.168.122.245


Server:

[root@server ~]# pvcreate /dev/vdb

[root@server ~]# vgcreate newvg /dev/vdb

[root@server ~]#  lvcreate -L 10G -n iscsi newvg

[root@server ~]# yum install targetcli -y

[root@server ~]# targetcli

> cd /backstores/block

/backstores/block> create iscsi_disk1 /dev/newvg/iscsi

Created block storage object iscsi_disk1 using /dev/newvg/iscsi.


/backstores/block> cd /iscsi

/iscsi> create iqn.2016-02.local.cass2.server:disk1

Created target iqn.2016-02.local.cass2.server:disk1.

Created TPG 1.

Global pref auto_add_default_portal=true

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


/iscsi> cd /iscsi/iqn.2016-02.local.cass2.server:disk1/tpg1/acls 

/iscsi/iqn.20...sk1/tpg1/acls> create iqn.2016-02.local.cass2.server:cass1

Created Node ACL for iqn.2016-02.local.cass2.server:cass1


/iscsi/iqn.20...sk1/tpg1/acls> cd /iscsi/iqn.2016-02.local.cass2.server:disk1/tpg1/luns 

/iscsi/iqn.20...sk1/tpg1/luns> create /backstores/block/iscsi_disk1

Created LUN 0.

Created LUN 0->0 mapping in node ACL iqn.2016-02.local.cass2.server:cass1

/iscsi/iqn.20...sk1/tpg1/luns> cd /

/> saveconfig 

Last 10 configs saved in /etc/target/backup/.

Configuration saved to /etc/target/saveconfig.json

/> exit

Global pref auto_save_on_exit=true

Last 10 configs saved in /etc/target/backup/.

Configuration saved to /etc/target/saveconfig.json


[root@server ~]# systemctl restart target.service



Client:

[root@client ~]# yum install iscsi-initiator-utils -y

[root@client ~]# vim /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2016-02.local.cass2.server:cass1

[root@client ~]# iscsiadm -m discovery -t st -p 192.168.122.246

[root@client ~]# systemctl restart iscsid.service

[root@client ~]# iscsiadm -m node -T iqn.2016-02.local.cass2.server:disk1 -p 192.168.122.246 -l

[root@client ~]# lsblk






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