一 iSCSI target的磁盘种类
- 大型文件
- 单一分区（partition）
- 磁盘
- 数组
- RAID
- LVM
二 iSCSI创建步骤
- 建立用于共享的磁盘设备(分区/磁盘/文件)
- 创建后备磁盘
- 创建相应的IQN
- 创建相应的规则 #（可选）
- 为后备磁盘创建LUN
- 指定侦听的IP和端口 #（可选）
- 检查并保存配置
- 防火墙规则开放
- 服务(开机)启动
三 建立所需磁盘设备
3.1 建立一个3GB大小的/dev/sdc1作为共享
1 Device Boot Start End Blocks Id System 2 /dev/sdc1 2048 6293503 3145728 83 Linux
3.2 建立一个2GB大小的/dev/server/iscsi01LV作为共享
使用fdisk创建一个用于共享的LVM分区disk1_lv。
1 Device Boot Start End Blocks Id System 2 /dev/sdb1 2048 4196351 2097152 8e Linux LVM 3 /dev/sdb2 4196352 8390655 2097152 8e Linux LVM 4 [root@system1 ~]# pvcreate /dev/sdb1 5 [root@system1 ~]# pvcreate /dev/sdb2 6 [root@system1 ~]# vgcreate iSCSI -s 16M /dev/sdb1 /dev/sdb2 7 Volume group "iSCSI" successfully created 8 [root@system1 ~]# lvcreate -n disk1_lv -L 2G iSCSI
3.3 建立一个1GB大小的文件disk1_file作为共享
1 [root@system1 ~]# dd if=/dev/zero of=/root/disk1_file bs=1M count=1024
四 创建后备存储
4.1 安装相关软件
1 [root@system1 ~]# yum -y install targetcli
4.2 相关设置-交互模式
1 [root@system1 ~]# targetcli #进入targetcli交互配置视图 2 block：定义的块设备，磁盘驱动器、磁盘分区、LVM等 3 fileio：创建的指定大小的文件，如dd if=/dev/zero of=……所创建 4 pscsi：物理SCSI，通常不采用此类型 5 ramdisk：在内存中创建的一个指定大小ramdisk设备 6 /> cd /backstores/ 7 /backstores> block/ create block1 /dev/iSCSI/disk1_lv #创建名为block1的lvm的后备存储 8 Created block storage object block1 using /dev/iSCSI/disk1_lv. 9 /backstores> block/ create block2 /dev/sdc1 #创建名为block2的磁盘分区后备存储 10 Created block storage object block2 using /dev/sdc1. 11 /backstores> fileio/ create file1 /root/disk1_file #创建名为file1的大型文件后备存储 12 Created fileio file1 with size 1073741824 13 /backstores> ls #查看创建情况 14 o- backstores ....................................................................................... [...] 15 o- block ........................................................................... [Storage Objects: 2] 16 | o- block1 ....................................... [/dev/iSCSI/disk1_lv (2.0GiB) write-thru deactivated] 17 | o- block2 ................................................. [/dev/sdc1 (3.0GiB) write-thru deactivated] 18 o- fileio .......................................................................... [Storage Objects: 1] 19 | o- file1 ........................................... [/root/disk1_file (1.0GiB) write-back deactivated] 20 o- pscsi ........................................................................... [Storage Objects: 0] 21 o- ramdisk ......................................................................... [Storage Objects: 0]
五 创建相应的IQN
1 /backstores> cd /iscsi 2 /iscsi> create iqn.2016-09.com.example:remotedisk1 #创建符合名称的IQN名称 3 /iscsi> ls 4 o- iscsi ..................................................................................... [Targets: 2] 5 o- iqn.2003-01.org.linux-iscsi.system1.x8664:sn.5792c2787dd8 .................................. [TPGs: 1] 6 | o- tpg1 ........................................................................ [no-gen-acls, no-auth] 7 | o- acls ................................................................................... [ACLs: 0] 8 | o- luns ................................................................................... [LUNs: 0] 9 | o- portals ............................................................................. [Portals: 0] 10 o- iqn.2016-09.com.example:remotedisk1 ........................................................ [TPGs: 1] 11 o- tpg1 ........................................................................ [no-gen-acls, no-auth] 12 o- acls ................................................................................... [ACLs: 0] 13 o- luns ................................................................................... [LUNs: 0] 14 o- portals ............................................................................. [Portals: 0]
六 创建相应的ACL规则
1 /iscsi> cd iqn.2016-09.com.example:remotedisk1/tpg1/ 2 /iscsi/iqn.20...otedisk1/tpg1> acls/ create iqn.2016-09.com.example:desktop0 3 #只允许 iqn.2016-09.com.example:desktop0客户端使用此iSCSI提供磁盘服务 4 /iscsi/iqn.20...otedisk1/tpg1> ls 5 o- tpg1 ............................................................................ [no-gen-acls, no-auth] 6 o- acls ....................................................................................... [ACLs: 1] 7 | o- iqn.2016-09.com.example:desktop0 .................................................. [Mapped LUNs: 0] 8 o- luns ....................................................................................... [LUNs: 0] 9 o- portals ................................................................................. [Portals: 0]
七 为后备存储创建LUN
注意：
1 之前创建的ACL将分配到每个LUN。
2 创建LUN必须在TPG下
1 /iscsi/iqn.20...otedisk1/tpg1> luns/ create /backstores/block/block1 2 #将之前创建的后备磁盘block1创建一个LUN 3 Created LUN 0. 4 Created LUN 0->0 mapping in node ACL iqn.2016-09.com.example:desktop0 5 /iscsi/iqn.20...otedisk1/tpg1> luns/ create /backstores/block/block2 #将之前创建的后备磁盘block2创建一个LUN 6 Created LUN 1. 7 Created LUN 1->1 mapping in node ACL iqn.2016-09.com.example:desktop0 8 /iscsi/iqn.20...otedisk1/tpg1> luns/ create /backstores/fileio/file1 #将之前创建的后备磁盘file1创建一个LUN 9 Created LUN 2. 10 Created LUN 2->2 mapping in node ACL iqn.2016-09.com.example:desktop0 11 /iscsi/iqn.20...otedisk1/tpg1> ls #查看所有信息 12 o- tpg1 ............................................................................ [no-gen-acls, no-auth] 13 o- acls ....................................................................................... [ACLs: 1] #ACL规则1条均分配在三个LUN中 14 | o- iqn.2016-09.com.example:desktop0 .................................................. [Mapped LUNs: 3] 15 | o- mapped_lun0 ............................................................. [lun0 block/block1 (rw)] 16 | o- mapped_lun1 ............................................................. [lun1 block/block2 (rw)] 17 | o- mapped_lun2 ............................................................. [lun2 fileio/file1 (rw)] 18 o- luns ....................................................................................... [LUNs: 3] #三个LUN均对应后备磁盘 19 | o- lun0 .......................................................... [block/block1 (/dev/iSCSI/disk1_lv)] 20 | o- lun1 .................................................................... [block/block2 (/dev/sdc1)] 21 | o- lun2 ............................................................. [fileio/file1 (/root/disk1_file)] 22 o- portals ................................................................................. [Portals: 0] 23 /iscsi/iqn.20...otedisk1/tpg1>
八 指定侦听IP地址和端口
注意：
1 若不指定端口将采用默认端口3260
2 若不指定IP，将允许服务器上定义的所有网络接口上的连接
3 创建LUN必须在TPG下
1 /iscsi/iqn.20...otedisk1/tpg1> portals/ create 172.24.8.11 #指定本地用于侦听客户端连接的IP 2 Using default IP port 3260 3 Created network portal 172.24.8.0:3260.
九 检查并保存退出
最后检查ls一遍，然后保存退出
1 /iscsi> cd / 2 /> ls 3 o- / ................................................................................................ [...] 4 o- backstores ..................................................................................... [...] 5 | o- block ......................................................................... [Storage Objects: 2] 6 | | o- block1 ....................................... [/dev/iSCSI/disk1_lv (2.0GiB) write-thru activated] 7 | | o- block2 ................................................. [/dev/sdc1 (3.0GiB) write-thru activated] 8 | o- fileio ........................................................................ [Storage Objects: 1] 9 | | o- file1 ........................................... [/root/disk1_file (1.0GiB) write-back activated] 10 | o- pscsi ......................................................................... [Storage Objects: 0] 11 | o- ramdisk ....................................................................... [Storage Objects: 0] 12 o- iscsi ................................................................................... [Targets: 1] 13 | o- iqn.2016-09.com.example:remotedisk1 ...................................................... [TPGs: 1] 14 | o- tpg1 ...................................................................... [no-gen-acls, no-auth] 15 | o- acls ................................................................................. [ACLs: 1] 16 | | o- iqn.2016-09.com.example:desktop0 ............................................ [Mapped LUNs: 3] 17 | | o- mapped_lun0 ....................................................... [lun0 block/block1 (rw)] 18 | | o- mapped_lun1 ....................................................... [lun1 block/block2 (rw)] 19 | | o- mapped_lun2 ....................................................... [lun2 fileio/file1 (rw)] 20 | o- luns ................................................................................. [LUNs: 3] 21 | | o- lun0 .................................................... [block/block1 (/dev/iSCSI/disk1_lv)] 22 | | o- lun1 .............................................................. [block/block2 (/dev/sdc1)] 23 | | o- lun2 ....................................................... [fileio/file1 (/root/disk1_file)] 24 | o- portals ........................................................................... [Portals: 1] 25 | o- 172.24.8.0:3260 ......................................................................... [OK] 26 o- loopback ................................................................................ [Targets: 0] 27 /> exit
十 防火墙开放
1 [root@system1 ~]# firewall-cmd --add-port=3260/tcp #防火墙添加iSCSI的端口 2 Warning: ALREADY_ENABLED 3 [root@system1 ~]# firewall-cmd --add-port=3260/tcp --permanent #防火墙开放此端口 4 success
十一 开启服务
1 [root@system1 ~]# systemctl start target 2 [root@system1 ~]# systemctl enable target