在之前文章multipath 多路径实验 01 - 构建 iSCSI 模拟环境中, 已经介绍了如何构建 iSCSI 模拟环境 (RHEL6), 但在 RHEL7 中已经不适用, 本文记录下新的配置方法.
环境: RHEL 7.3
1.LVM 创建
2. 服务端配置
3. 客户端配置
1.LVM 创建
在 RHEL7.3 中, 对于 lvm 操作部分与之前 RHEL6 版本没有区别, 还是创建 pv,vg,lv 的方法, 命令参考如下:
- pvcreate /dev/sdb
- vgcreate vg_storage /dev/sdb
- lvcreate -L 1g -n lv_lun1 vg_storage
- lvcreate -L 1g -n lv_lun2 vg_storage
- lvcreate -L 1g -n lv_lun3 vg_storage
- lvcreate -L 40g -n lv_lun4 vg_storage
- lvcreate -L 10g -n lv_lun5 vg_storage
- lvcreate -L 10g -n lv_lun6 vg_storage
- lvcreate -L 10g -n lv_lun7 vg_storage
- lvcreate -L 16g -n lv_lun8 vg_storage
最终可以看到新建的 lv 信息:
- [root@Storage-B yum.repos.d]# lvs
- LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
- home rhel -wi-ao---- 23.33g
- root rhel -wi-ao---- 47.79g
- swap rhel -wi-ao---- 7.88g
- lv_lun1 vg_storage -wi-a----- 1.00g
- lv_lun2 vg_storage -wi-a----- 1.00g
- lv_lun3 vg_storage -wi-a----- 1.00g
- lv_lun4 vg_storage -wi-a----- 40.00g
- lv_lun5 vg_storage -wi-a----- 10.00g
- lv_lun6 vg_storage -wi-a----- 10.00g
- lv_lun7 vg_storage -wi-a----- 10.00g
- lv_lun8 vg_storage -wi-a----- 16.00g
2. 服务端配置
之前在 RHEL6 中安装的 iscsi 服务端 rpm 包的名字是: scsi-target-utils, 这在 RHEL7 中变成了 targetd,targetcli 这两个包.
2.1 使用 yum 安装 targetd 和 targetcli
- yum -y install targetd targetcli
- systemctl status targetd
- systemctl start targetd
- systemctl enable targetd
- systemctl list-unit-files|grep targetd
同时确认 targetd 服务启动状态和开启启动.
2.2 使用 targetcli 创建设备
targetcli 进入命令行, cd 到 / backstores/block 目录下, 创建设备:
- create disk1 /dev/mapper/vg_storage-lv_lun1
- create disk2 /dev/mapper/vg_storage-lv_lun2
- create disk3 /dev/mapper/vg_storage-lv_lun3
- create disk4 /dev/mapper/vg_storage-lv_lun4
- create disk5 /dev/mapper/vg_storage-lv_lun5
- create disk6 /dev/mapper/vg_storage-lv_lun6
- create disk7 /dev/mapper/vg_storage-lv_lun7
- create disk8 /dev/mapper/vg_storage-lv_lun8
创建完成, 可以成功看到:
- /backstores/block> ls
- o- block ...................................................................................................... [Storage Objects: 8]
- o- disk1 ........................................................ [/dev/mapper/vg_storage-lv_lun1 (1.0GiB) write-thru deactivated]
- o- disk2 ........................................................ [/dev/mapper/vg_storage-lv_lun2 (1.0GiB) write-thru deactivated]
- o- disk3 ........................................................ [/dev/mapper/vg_storage-lv_lun3 (1.0GiB) write-thru deactivated]
- o- disk4 ....................................................... [/dev/mapper/vg_storage-lv_lun4 (40.0GiB) write-thru deactivated]
- o- disk5 ....................................................... [/dev/mapper/vg_storage-lv_lun5 (10.0GiB) write-thru deactivated]
- o- disk6 ....................................................... [/dev/mapper/vg_storage-lv_lun6 (10.0GiB) write-thru deactivated]
- o- disk7 ....................................................... [/dev/mapper/vg_storage-lv_lun7 (10.0GiB) write-thru deactivated]
- o- disk8 ....................................................... [/dev/mapper/vg_storage-lv_lun8 (16.0GiB) write-thru deactivated]
2.3 使用 targetcli 创建 iqn 和 LUN
然后 cd 到 / iscsi 目录下, 创建 iqn;cd 到 / iscsi/iqn.20...0be/tpg1/luns 下创建 LUN, 参考命令如下:
- cd /iscsi
- create
- cd /iscsi/iqn.20...0be/tpg1/luns
- create /backstores/block/disk1
- create /backstores/block/disk2
- create /backstores/block/disk3
- create /backstores/block/disk4
- create /backstores/block/disk5
- create /backstores/block/disk6
- create /backstores/block/disk7
- create /backstores/block/disk8
实际执行过程如下:
- /backstores/block> cd /iscsi
- /iscsi> ls
- o- iscsi .............................................................................................................. [Targets: 0]
- /iscsi> create
- Created target iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be.
- Created TPG 1.
- Global pref auto_add_default_portal=true
- Created default portal listening on all IPs (0.0.0.0), port 3260.
- /iscsi> ls
- o- iscsi .............................................................................................................. [Targets: 1]
- o- iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be ......................................................... [TPGs: 1]
- o- tpg1 ................................................................................................. [no-gen-acls, no-auth]
- o- acls ............................................................................................................ [ACLs: 0]
- o- luns ............................................................................................................ [LUNs: 0]
- o- portals ...................................................................................................... [Portals: 1]
- o- 0.0.0.0:3260 ....................................................................................................... [OK]
- /iscsi/iqn.20...0be/tpg1/luns> ls
- o- luns .................................................................................................................. [LUNs: 8]
- o- lun0 ........................................................................... [block/disk1 (/dev/mapper/vg_storage-lv_lun1)]
- o- lun1 ........................................................................... [block/disk2 (/dev/mapper/vg_storage-lv_lun2)]
- o- lun2 ........................................................................... [block/disk3 (/dev/mapper/vg_storage-lv_lun3)]
- o- lun3 ........................................................................... [block/disk4 (/dev/mapper/vg_storage-lv_lun4)]
- o- lun4 ........................................................................... [block/disk5 (/dev/mapper/vg_storage-lv_lun5)]
- o- lun5 ........................................................................... [block/disk6 (/dev/mapper/vg_storage-lv_lun6)]
- o- lun6 ........................................................................... [block/disk7 (/dev/mapper/vg_storage-lv_lun7)]
- o- lun7 ........................................................................... [block/disk8 (/dev/mapper/vg_storage-lv_lun8)]
- /iscsi/iqn.20...0be/tpg1/luns>
2.4 使用 targetcli 创建 acls
cd 到 acls 目录下, 创建 client; 然后 cd 到 portals 目录下创建 portals, 参考命令如下:
- cd /iscsi/iqn.20...0be/tpg1/acls
- create iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be:client
- cd /iscsi/iqn.20...0be/tpg1/portals
- delete 0.0.0.0 3260
- create 10.10.1.21
- create 10.10.2.21
实际执行过程如下:
- /iscsi/iqn.20.../tpg1/portals> pwd
- /iscsi/iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be/tpg1/portals
- /iscsi/iqn.20.../tpg1/portals> ls
- o- portals ............................................................................................................ [Portals: 2]
- o- 10.10.1.21:3260 .......................................................................................................... [OK]
- o- 10.10.2.21:3260 .......................................................................................................... [OK]
2.5 使用 targetcli 查看当前配置信息
在 / 下执行 ls, 或者 ls / 查看当前配置信息:
- /iscsi/iqn.20.../tpg1/portals> ls /
- o- / ......................................................................................................................... [...]
- o- backstores .............................................................................................................. [...]
- | o- block .................................................................................................. [Storage Objects: 8]
- | | o- disk1 ...................................................... [/dev/mapper/vg_storage-lv_lun1 (1.0GiB) write-thru activated]
- | | o- disk2 ...................................................... [/dev/mapper/vg_storage-lv_lun2 (1.0GiB) write-thru activated]
- | | o- disk3 ...................................................... [/dev/mapper/vg_storage-lv_lun3 (1.0GiB) write-thru activated]
- | | o- disk4 ..................................................... [/dev/mapper/vg_storage-lv_lun4 (40.0GiB) write-thru activated]
- | | o- disk5 ..................................................... [/dev/mapper/vg_storage-lv_lun5 (10.0GiB) write-thru activated]
- | | o- disk6 ..................................................... [/dev/mapper/vg_storage-lv_lun6 (10.0GiB) write-thru activated]
- | | o- disk7 ..................................................... [/dev/mapper/vg_storage-lv_lun7 (10.0GiB) write-thru activated]
- | | o- disk8 ..................................................... [/dev/mapper/vg_storage-lv_lun8 (16.0GiB) write-thru activated]
- | o- fileio ................................................................................................. [Storage Objects: 0]
- | o- pscsi .................................................................................................. [Storage Objects: 0]
- | o- ramdisk ................................................................................................ [Storage Objects: 0]
- o- iscsi ............................................................................................................ [Targets: 1]
- | o- iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be ....................................................... [TPGs: 1]
- | o- tpg1 ............................................................................................... [no-gen-acls, no-auth]
- | o- acls .......................................................................................................... [ACLs: 1]
- | | o- iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be:client ................................... [Mapped LUNs: 8]
- | | o- mapped_lun0 ................................................................................. [lun0 block/disk1 (rw)]
- | | o- mapped_lun1 ................................................................................. [lun1 block/disk2 (rw)]
- | | o- mapped_lun2 ................................................................................. [lun2 block/disk3 (rw)]
- | | o- mapped_lun3 ................................................................................. [lun3 block/disk4 (rw)]
- | | o- mapped_lun4 ................................................................................. [lun4 block/disk5 (rw)]
- | | o- mapped_lun5 ................................................................................. [lun5 block/disk6 (rw)]
- | | o- mapped_lun6 ................................................................................. [lun6 block/disk7 (rw)]
- | | o- mapped_lun7 ................................................................................. [lun7 block/disk8 (rw)]
- | o- luns .......................................................................................................... [LUNs: 8]
- | | o- lun0 ................................................................... [block/disk1 (/dev/mapper/vg_storage-lv_lun1)]
- | | o- lun1 ................................................................... [block/disk2 (/dev/mapper/vg_storage-lv_lun2)]
- | | o- lun2 ................................................................... [block/disk3 (/dev/mapper/vg_storage-lv_lun3)]
- | | o- lun3 ................................................................... [block/disk4 (/dev/mapper/vg_storage-lv_lun4)]
- | | o- lun4 ................................................................... [block/disk5 (/dev/mapper/vg_storage-lv_lun5)]
- | | o- lun5 ................................................................... [block/disk6 (/dev/mapper/vg_storage-lv_lun6)]
- | | o- lun6 ................................................................... [block/disk7 (/dev/mapper/vg_storage-lv_lun7)]
- | | o- lun7 ................................................................... [block/disk8 (/dev/mapper/vg_storage-lv_lun8)]
- | o- portals .................................................................................................... [Portals: 2]
- | o- 10.10.1.21:3260 .................................................................................................. [OK]
- | o- 10.10.2.21:3260 .................................................................................................. [OK]
- o- loopback ......................................................................................................... [Targets: 0]
- /iscsi/iqn.20.../tpg1/portals>
最后配置防火墙策略, 或者直接关闭防火墙, 建议后者, 视具体要求而定.
-- 防火墙添加放行 tcp 3260 端口:
- firewall-cmd --permanent --add-port=3260/tcp
- firewall-cmd --reload
-- 关闭防火墙:
- systemctl disable firewalld
- systemctl stop firewalld
3. 客户端配置
3.1 使用 yum 安装 iscsi-initiator-utils
yum -y install iscsi-initiator-utils
3.2 编辑 / etc/iscsi/initiatorname.iscsi
- vi /etc/iscsi/initiatorname.iscsi
- #InitiatorName=iqn.1994-05.com.redhat:babc7da33c48
- InitiatorName=iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be:client
注释之前的示例, 添加一行实际的配置.
3.3 使用 iscsiadm 发现可用存储设备并登陆连接
- iscsiadm -m discovery -t st -p 10.10.1.21
- [root@db92 yum.repos.d]# iscsiadm -m discovery -t st -p 10.10.1.21
- 10.10.1.21:3260,1 iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be
- 10.10.2.21:3260,1 iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be
登陆连接:
- iscsiadm -m node -T iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be -p 10.10.1.21 --login
- iscsiadm -m node -T iqn.2003-01.org.linux-iscsi.storage-b.x8664:sn.46b1dc2750be -p 10.10.2.21 --login
此时使用 fdisk -l 查看已经正常显示所有设备:
- [root@db90 ~]# fdisk -l
- Disk /dev/sda: 85.9 GB, 85899345920 bytes, 167772160 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 512 bytes
- Disk label type: dos
- Disk identifier: 0x0001b841
- Device Boot Start End Blocks Id System
- /dev/sda1 * 2048 2099199 1048576 83 Linux
- /dev/sda2 2099200 167772159 82836480 8e Linux LVM
- Disk /dev/mapper/rhel-root: 51.3 GB, 51308920832 bytes, 100212736 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 512 bytes
- Disk /dev/mapper/rhel-swap: 8455 MB, 8455716864 bytes, 16515072 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 512 bytes
- Disk /dev/mapper/rhel-home: 25.1 GB, 25052577792 bytes, 48930816 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 512 bytes
- Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdc: 1073 MB, 1073741824 bytes, 2097152 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdd: 1073 MB, 1073741824 bytes, 2097152 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sde: 1073 MB, 1073741824 bytes, 2097152 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdg: 1073 MB, 1073741824 bytes, 2097152 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdf: 42.9 GB, 42949672960 bytes, 83886080 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdh: 1073 MB, 1073741824 bytes, 2097152 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdi: 10.7 GB, 10737418240 bytes, 20971520 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdj: 42.9 GB, 42949672960 bytes, 83886080 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdl: 10.7 GB, 10737418240 bytes, 20971520 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdk: 10.7 GB, 10737418240 bytes, 20971520 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdn: 10.7 GB, 10737418240 bytes, 20971520 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdm: 10.7 GB, 10737418240 bytes, 20971520 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdo: 10.7 GB, 10737418240 bytes, 20971520 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdp: 17.2 GB, 17179869184 bytes, 33554432 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- Disk /dev/sdq: 17.2 GB, 17179869184 bytes, 33554432 sectors
- Units = sectors of 1 * 512 = 512 bytes
- Sector size (logical/physical): 512 bytes / 512 bytes
- I/O size (minimum/optimal): 512 bytes / 33550336 bytes
- [root@db90 ~]#
由于是两条链路, 所以 fdisk 看到的存储 LUN 是两倍, 后续再使用多路径软件聚合即可使用.
来源: https://www.cnblogs.com/jyzhao/p/9349846.html