一 iscsi简介
The Internet Small Computer System Interface ,它是基于IP网络的TCP/IP协议的高可用本地存储。提供给远程主机数据传输和远程磁盘block管理。
ISCSI卡
iscsi软件
相关名称：
IQN ：unique name to identifiy individual iscsi targets and initiators
WWN : unique number to identifiy individual Fibre Chananel port and nodes
LUN : storage resource block device on an iscsi server
target : storage resource on an iscsi server
initiator : ISCSI client implemented in either software or hardware
node : a single iscsi initiator or target
二 安装配置
yum install -y targetcli
targetcli
ls
cd /iscsi
create iqn.2016.com.example:remotedisk1
systemctl enable target
targetcli /backstores/block create block1 /dev/vdb
targetcli /isci create iqn.xxxx:remotedisk1
targetcli saveconfig
systemctl start target
firewall-cmd --permanent --add-port=3260/tcp
firewall-cmd --reload
fdisk /dev/vdb
pvcreate /dev/vdb1
vgcreate ISCSI_vg /dev/vdb1
vgdisplay iSCSI_vg
lvcreate -n disk1_lv -L 100m iSCSI_vg
lvdisplay iScsi_vg/disk1_lv
targetcli
>/backstores/block/ create serverX.disk1 /dev/iSCSI_vg/DISK1_LV
>/iscsi create iqn.2016.com.example:serverX
>/iscsi/iqn.2016.eample.com:serverX/tpg1/acls/ create
>/iscsi/iqn.2016.example.com:serverX/tpg1/luns create /bacstores/bolck/serverX.disk1
>/iscsi/iqn.2016.com.example:serverX/tpg1/portals create 172.x.x.
ls
/etc/target/saveconfig.json.
>exit
2. accessing iscsi storage
vi /etc/iscsi/iscsid.conf
vi /etc/iscsi/initiatorname.iscsi
systemctl restart iscsi
lsblk
iscsiadm -m session -P 3
iscsiadm -m mode -T iqn.example.com:serverX -p 172.x.x.x -u
三 实例
iscsi target共享一个目录/dataiscsi出去，client服务器，通过iscsi协议使用这个lun，格式化后，挂载到/data_iscsi
