iscsi 部署
环境准备：
主机： os/ip/hostname
host1：centos7.8 192.168.92.72 target72
host2：centos7.8 192.168.92.71 init71
host3: centos7.8 192.168.92.70 init70
一：部署target端：
1 准备磁盘
1.1 host1 新增两块10g硬盘
1.2 将两块10g硬盘作成lv
#fidsk -l
Disk /dev/sdb: 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 / 512 bytes
Disk /dev/sdc: 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 / 512 bytes
1.2.1 创建pv
# pvcreat /dev/sdb
# pvcreat /dev/sdc
# pvdisplay
"/dev/sdb" is a new physical volume of "10.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb
VG Name
PV Size 10.00 GiB
"/dev/sdc" is a new physical volume of "10.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc
VG Name
PV Size 10.00 GiB
1.2.2 创建vg
#vgcreat vg1 /dev/sdb
Volume group "vg1" successfully created
#vgextend vg1 /dev/sdc
Volume group "vg1" successfully extended
# vgdisplay
--- Volume group ---
VG Name vg1
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 2
Act PV 2
VG Size 19.99 GiB
PE Size 4.00 MiB
Total PE 5118
Alloc PE / Size 0 / 0
Free PE / Size 5118 / 19.99 GiB
VG UUID KmRdJa-908o-bUHa-Nz3g-5onb-5Lhc-EIhxAk
# pvdisplay
--- Physical volume ---
PV Name /dev/sdb
VG Name vg1
PV Size 10.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 2559
Free PE 2559
Allocated PE 0
PV UUID 2sy2lT-egJA-rwJ1-4SfS-YDGV-odP4-3S8FcK
--- Physical volume ---
PV Name /dev/sdc
VG Name vg1
PV Size 10.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 2559
Free PE 2559
Allocated PE 0
PV UUID bxxKlg-cf2H-d06O-z8F0-NiBd-fvFB-uPDGPL
1.2.3 创建lv，创建15g吧
lvcreate -L 15g vg1 -n lv1
Logical volume "lv1" created.
# lvdisplay
--- Logical volume ---
LV Path /dev/vg1/lv1
LV Name lv1
VG Name vg1
LV UUID 9Pkzbf-MzOA-bpWS-RkKR-3f0P-vod2-7TptVd
LV Write Access read/write
LV Creation host, time c72, 2020-08-03 04:22:07 -0400
LV Status available
# open 0
LV Size 15.00 GiB
Current LE 3840
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:2
#fidsk -l
Disk /dev/mapper/vg1-lv1: 16.1 GB, 16106127360 bytes, 31457280 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
2 安装程序包
# yum install targetcli.noarch
3 创建块存储
//查看当前tartget配置
/> ls
o- / ............................................................................................... [...]
o- backstores .................................................................................... [...]
| o- block ........................................................................ [Storage Objects: 0]
| o- fileio ....................................................................... [Storage Objects: 0]
| o- pscsi ........................................................................ [Storage Objects: 0]
| o- ramdisk ...................................................................... [Storage Objects: 0]
o- iscsi .................................................................................. [Targets: 0]
o- loopback ............................................................................... [Targets: 0]
3.1 创3 创建块存储
/> backstores/block create test-b-1 /dev/vg1/lv1
Created block storage object test-b-1 using /dev/vg1/lv1.
//查看当前tartget配置
/> ls
o- / ............................................................................................... [...]
o- backstores .................................................................................... [...]
| o- block ........................................................................ [Storage Objects: 1]
| | o- test-b-1 ........................................ [/dev/vg1/lv1 (15.0GiB) write-thru deactivated]
| | o- alua ......................................................................... [ALUA Groups: 1]
| | o- default_tg_pt_gp ............................................. [ALUA state: Active/optimized]
| o- fileio ....................................................................... [Storage Objects: 0]
| o- pscsi ........................................................................ [Storage Objects: 0]
| o- ramdisk ...................................................................... [Storage Objects: 0]
o- iscsi .................................................................................. [Targets: 0]
o- loopback ............................................................................... [Targets: 0]
4 创建iscsi target iqn
/> iscsi/ create iqn.year-mon.域名反写:host // 建议格式
4.1 /> iscsi/ create iqn.2020-08.com.testdomain:target72
Created target iqn.2020-08.com.testdomain:target72.
Created TPG 1.
Global pref auto_add_default_portal=true
Created default portal listening on all IPs (0.0.0.0), port 3260.
//查看端口
ss -lnt
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 256 *:3260 *
5 创建lun
/> /iscsi/iqn.2020-08.com.testdomain:target72/tpg1/luns create /backstores/block/test-b-1
6 授权 initclient1 可以访问
/> /iscsi/iqn.2020-08.com.testdomain:target72/tpg1/acls create iqn.2020-08.com.testdomain:initclient1
7 配置认证（可选）
8 配置监听端口（可选)
/> iscsi/iqn.2020-08.com.testdomain:target72/tpg1/portals/ delete 0.0.0.0 3260
/> iscsi/iqn.2020-08.com.testdomain:target72/tpg1/portals/ creat 192.168.92.72
二：部署initiator 端：
1 安装客户端
# yum install iscsi-initiator-utils.i686
不要先启动，先配置配置文件，否则连接不上，重启解决
2 配置iqn
# vim /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2020-08.com.testdomain:initclient1
3 配置认证认证
# vim /etc/iscsi/iscsid.conf
# To enable CHAP authentication set node.session.auth.authmethod
# to CHAP. The default is None.
#node.session.auth.authmethod = CHAP //去掉注释
# To set a CHAP username and password for initiator
# authentication by the target(s), uncomment the following lines:
#node.session.auth.username = username //配置服务端配置的用户名
#node.session.auth.password = password //配置服务器配置的密码
4 启动服务
# systemctl start iscsi
# systemctl ebable iscsi
4 发现设备
# iscsiadm -m discovery -t st -p 192.168.92.72
5 登录服务器 （登录不上。。。后面没法做了）
# iscsiadm -m node -T iqn.2020-08.com.testdomain:target72 -l
6 挂载 ，分区， 格式化
#fdisk -l
