[RHEL 7]ISCSI服务端及客户端连接配置

环境RHEL7.4

1.搭建服务器端主机环境

网络配置

网卡eth0 10.0.0.1

网卡eth1 10.1.0.1

网卡eth2 10.2.0.1

网卡eth3 10.3.0.1

硬盘配置

添加一块100GB硬盘，配置成DATAVG，划分LV并发布成iscsi硬盘

iscsi target服务配置

#yum install targetd targetcli -y

启动服务，并设定为开机启动

systemctl enable target

systemctl start target

开启防火墙端口

firewall-cmd --permanent --add-port=3260/tcp

firewall-cmd --reload

这里使用新添加的/dev/sdb作为存储盘

创建分区1，pv,vg,lv

fdisk /dev/sdb

p查看->n新建->p主分区->1分区1->回车默认起始扇区->回车默认使用全部大小

t选择分区类型->L列出所有类型->8e设定为Linux LVM->w写入磁盘

# partprobe /dev/sdb

# partprobe /dev/sdb

# pvcreate /dev/sdb1

# vgcreate vgiscsi00 /dev/sdb1

# lvcreate -n lv_5G_00 -L 5G vgiscsi00

# lvcreate -n lv_5G_01 -L 5G vgiscsi00

# lvcreate -n lv_5G_02 -L 5G vgiscsi00

创建disk

/>cd backstores/block

/backstores/block> create asmdisk5G00.disk /dev/vgiscsi00/lv_5G_00

/backstores/block> create asmdisk5G01.disk /dev/vgiscsi00/lv_5G_01

/backstores/block> create asmdisk5G02.disk /dev/vgiscsi00/lv_5G_02

创建iscsi target目标并分配创建LUN

/backstores/block> cd /iscsi/

/iscsi> create iqn.2015-06.com.sample.domain:sharedisk

为客户端节点创建acl

create iqn.2015-06.com.sample.domain:server00

为目标创建LUN

create /backstores/block/asmdisk5G00.disk

create /backstores/block/asmdisk5G01.disk

create /backstores/block/asmdisk5G02.disk

配置门户以使用目标侦听192.168.31.11端口3260

create 10.0.0.1

create 10.1.0.1

create 10.2.0.1

create 10.3.0.1

保存配置

/> exit

Global pref auto_save_on_exit=true

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

Configuration saved to /etc/target/saveconfig.json

2.客户端主机配置

网卡eth0 10.0.0.10

网卡eth1 10.1.0.11

网卡eth2 10.2.0.12

网卡eth3 10.3.0.13

客户端访问iscsi存储

1. 安装软件包

yum install iscsi-initiator-utils -y

2. 设定initiator名称

[root@localhost ~]# cat /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2015-06.com.sample.domain:server00

3. 启动服务，并开机启动

systemctl enable iscsi

systemctl start iscsi

4. 发现目标服务器门户

# iscsiadm -m discovery -t st -p 10.0.0.1

5.登陆到呈现的iSCSI目标

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.0.0.1 –l

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.1.0.1 –l

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.2.0.1 –l

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.3.0.1 -l

2. 标示由iSCSI目标登陆所创建的最新可用块设备

lsblk

tail /var/log/messages

3. 列出iscsi 服务所识别的目标

iscsiadm -m session -P 3

4. 验证iSCSI磁盘的设备节点

[root@localhost nodes]# iscsiadm -m session -P 3|grep Attached

5. 查找新iSCSI目标的持久节点记录

cd /var/lib/iscsi/nodes

ls -1R

6. 查看链接参数默认值

less iqn.2015-06.com.sample.domain:sharedisk /10.0.0.1,3260,1/default

7. 断开链接

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.0.0.1 –u

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.1.0.1 –u

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.2.0.1 –u

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.3.0.1 -u

ls -1R仍存在记录，但是lsblk块存储消失，重启iscsi服务，lsblk重新发现

8. 彻底删除链接

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.0.0.1 -u

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.1.0.1 -u

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.2.0.1 -u

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.3.0.1 -u

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.0.0.1 -o delete

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.1.0.1  -o delete

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.2.0.1 -o delete

# iscsiadm -m node -T iqn.2015-06.com.sample.domain:sharedisk -p 10.3.0.1 -o delete

ls -1R记录消失，但是lsblk块存储消失，重启iscsi服务，lsblk没有节点记录

9. 重新发现目标门户，节点记录自动创建

# iscsiadm -m discovery -t st -p 192.168.31.11

#ls -1R

# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

fd0 2:0 1 4K 0 disk

sda 8:0 0 30G 0 disk

├─sda1 8:1 0 500M 0 part /boot

└─sda2 8:2 0 29.5G 0 part

├─rhel-root 253:0 0 27.5G 0 lvm /

└─rhel-swap 253:1 0 2G 0 lvm [SWAP]

sr0 11:0 1 3.5G 0 rom

10. 使用iscsi磁盘

[root@localhost nodes]# blkid /dev/sdb

[root@localhost nodes]# fdisk -l