CentOS 7配置iSCSI共享存储案例

案例说明：
在CentOS 7环境下，配置iscsi共享存储。

操作系统版本：

[root@node201 KingbaseHA]# cat /etc/centos-release
CentOS Linux release 7.9.2009 (Core)

集群架构：
如下所示，node1和node2为集群节点：

节点信息：

[root@node201 KingbaseHA]# vi /etc/hosts
192.168.1.201 node201
192.168.1.202 node202
192.168.1.203 node203    iscsi_Srv

集群软件：

[root@node201 data]# rpm -qa |egrep 'corosync|pacemaker'
corosynclib-2.4.5-7.el7_9.2.x86_64
pacemaker-1.1.23-1.el7_9.1.x86_64
pacemaker-libs-1.1.23-1.el7_9.1.x86_64
pacemaker-doc-1.1.23-1.el7_9.1.x86_64
corosync-qdevice-2.4.5-7.el7_9.2.x86_64
pacemaker-cluster-libs-1.1.23-1.el7_9.1.x86_64
pacemaker-cli-1.1.23-1.el7_9.1.x86_64
corosync-2.4.5-7.el7_9.2.x86_64

iSCSI简介：

iSCSI（Internet Small Computer System Interface）是一种在IP网络上传输SCSI（Small Computer System Interface）命令和数据的存储协议。它允许将远程存储设备映射到本地主机，提供了一种基于网络的存储解决方案。

iSCSI服务架构涉及以下组件：

iSCSI Initiator(客户端)：iSCSI发起器是指主机或计算机系统，它通过iSCSI协议与远程存储设备进行通信。发起器通过网络发送iSCSI命令和数据来访问远程存储。
iSCSI Target(服务端)：iSCSI目标是远程存储设备或存储服务器，它通过iSCSI协议接受发起器的请求。目标将接收到的iSCSI命令转换为对存储设备的本地SCSI命令，并将数据传输回发起器。
iSCSI Initiator 和 Target 之间的网络连接：iSCSI Initiator 和 Target 之间的通信是通过TCP/IP网络实现的。通常使用以太网作为传输介质，并使用标准的IP协议栈进行通信。
iSCSI Initiator 驱动程序(iscsid)：iSCSI Initiator 驱动程序是在主机操作系统上运行的软件组件，负责将iSCSI命令和数据传递给网络，并处理从网络接收到的响应。
iSCSI Target 软件(target.service,targetcli)：iSCSI Target 软件是在远程存储设备上运行的软件组件，用于接受和处理来自发起器的iSCSI请求，并将其转换为本地存储设备的操作。
存储设备：存储设备可以是磁盘阵列、磁盘存储系统或其他支持SCSI协议的存储设备,LVM 等。iSCSI目标通过本地存储设备提供存储服务。

一、配置ISCSI共享

1、server端安装软件
[root@node201 ~]# yum install targetd targetcli -y

2、启动target服务

[root@node201 ~]# systemctl start targetd
[root@node201 ~]# systemctl enable targetd
Created symlink from /etc/systemd/system/multi-user.target.wants/targetd.service to /usr/lib/systemd/system/targetd.service.

3、配置iscsi共享
如下所示，通过targetli工具配置iscsi的共享：

1）targetli帮助信息

[root@node203 ~]# targetcli

AVAILABLE COMMANDS
==================
The following commands are available in the
current path:

  - bookmarks action [bookmark]
  - cd [path]
  - clearconfig [confirm]
  - exit
  - get [group] [parameter...]
  - help [topic]
  - ls [path] [depth]
  - pwd
  - refresh
  - restoreconfig [savefile] [clear_existing] [target] [storage_object]
  - saveconfig [savefile]
  - sessions [action] [sid]
  - set [group] [parameter=value...]
  - status
  - version
/> exit
Global pref auto_save_on_exit=true
Configuration saved to /etc/target/saveconfig.json

2）创建iscsi磁盘

/> /backstores/block create idisk1 /dev/sdb
Created block storage object idisk1 using /dev/sdb.
/> /backstores/block create idisk2 /dev/sdc
Created block storage object idisk2 using /dev/sdc.

/> ls
o- / ........................................................................................... [...]
  o- backstores ................................................................................ [...]
  | o- block .................................................................... [Storage Objects: 2]
  | | o- idisk1 .......................................... [/dev/sdb (10.7GiB) write-thru deactivated]
  | | | o- alua ..................................................................... [ALUA Groups: 1]
  | | |   o- default_tg_pt_gp ......................................... [ALUA state: Active/optimized]
  | | o- idisk2 ......................................... [/dev/sdc (512.0MiB) 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]

iSCSI 支持下面四种后端存储类型：

block：它允许将块设备作为iSCSI后端存储使用，例如硬盘驱动器或逻辑卷。
fileio：它允许使用文件作为iSCSI后端存储使用，即将文件作为虚拟磁盘提供给iSCSI客户端。
pscsi：pscsi代表"pass-through SCSI"，允许将SCSI设备直接公开给iSCSI客户端，以便客户端可以直接访问SCSI命令。
ramdisk：它允许将RAM磁盘作为iSCSI后端存储使用，即将内存中的一部分作为虚拟磁盘提供给iSCSI客户端。

3）创建iSCSI服务端

/> iscsi/ create iqn.2024-08.pip.cc:server
Created target iqn.2024-08.pip.cc:server.
Created TPG 1.
Global pref auto_add_default_portal=true
Created default portal listening on all IPs (0.0.0.0), port 3260.
/> ls
o- / ........................................................................................... [...]
  o- backstores ................................................................................ [...]
  | o- block .................................................................... [Storage Objects: 2]
  | | o- idisk1 .......................................... [/dev/sdb (10.7GiB) write-thru deactivated]
  | | | o- alua ..................................................................... [ALUA Groups: 1]
  | | |   o- default_tg_pt_gp ......................................... [ALUA state: Active/optimized]
  | | o- idisk2 ......................................... [/dev/sdc (512.0MiB) 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: 1]
  | o- iqn.2024-08.pip.cc:server ........................................................... [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]
  o- loopback ........................................................................... [Targets: 0]

关于为 Target 创建 IQN，有以下几点需要进行说明：

在为 Target 创建 IQN 时会在此 IQN 下面创建一个默认的 TPG。
IQN 即 iSCSI 限定名称，一个全球唯一名称，用于以强制命名格式来识别启动器（initiator）和目标（target）。
通用格式：iqn.YYYY-MM.com.reversed.domain[:optional_string]；
iqn：表示此名称将使用域作为其标识符；
YYYY-MM：拥有域名的第一个月；
com.reversed.domain：此 iSCSI 名称的创建组织的逆向域名；
optional_string：以冒号为前缀的可选字符串。
管理员如果不指定要创建的 IQN，系统会自动生成一个 IQN。

4）创建lun（共享卷）

 /> cd iscsi/iqn.2024-08.pip.cc:server/tpg1/
/iscsi/iqn.20...c:server/tpg1> luns/ create /backstores/block/idisk1
Created LUN 0.
/iscsi/iqn.20...c:server/tpg1> luns/ create /backstores/block/idisk2
Created LUN 1.
/iscsi/iqn.20...c:server/tpg1> ls
o- tpg1 ....................................................................... [no-gen-acls, no-auth]
  o- acls .................................................................................. [ACLs: 0]
  o- luns .................................................................................. [LUNs: 2]
  | o- lun0 ............................................. [block/idisk1 (/dev/sdb) (default_tg_pt_gp)]
  | o- lun1 ............................................. [block/idisk2 (/dev/sdc) (default_tg_pt_gp)]
  o- portals ............................................................................ [Portals: 1]
    o- 0.0.0.0:3260 ............................................................................. [OK]

5）创建客户端认证（chap）

/iscsi/iqn.20...c:server/tpg1>  acls/ create iqn.2024-08.pip.cc:client
Created Node ACL for iqn.2024-08.pip.cc:client
Created mapped LUN 1.
Created mapped LUN 0.
/iscsi/iqn.20...c:server/tpg1>  cd acls/iqn.2024-08.pip.cc:client/
/iscsi/iqn.20...pip.cc:client> set auth userid=root
Parameter userid is now 'root'.
/iscsi/iqn.20...pip.cc:client> set auth password=123456
Parameter password is now '123456'.
/iscsi/iqn.20...pip.cc:client> info
chap_password: 123456
chap_userid: root
wwns:
iqn.2024-08.pip.cc:client

6）创建portal
管理员需要创建一个门户配置以指定监听 IP 地址和端口；如果未指定 IP 则默认使用 0.0.0.0 地址；如果未指定端口号则默认使用 3260 端口。

/> cd iscsi/iqn.2024-08.pip.cc:server/tpg1/
/iscsi/iqn.20...c:server/tpg1> ls
o- tpg1 ....................................................................... [no-gen-acls, no-auth]
  o- acls .................................................................................. [ACLs: 1]
  | o- iqn.2024-08.pip.cc:client .................................................... [Mapped LUNs: 2]
  |   o- mapped_lun0 ........................................................ [lun0 block/idisk1 (rw)]
  |   o- mapped_lun1 ........................................................ [lun1 block/idisk2 (rw)]
  o- luns .................................................................................. [LUNs: 2]
  | o- lun0 ............................................. [block/idisk1 (/dev/sdb) (default_tg_pt_gp)]
  | o- lun1 ............................................. [block/idisk2 (/dev/sdc) (default_tg_pt_gp)]
  o- portals ............................................................................ [Portals: 1]
    o- 0.0.0.0:3260 ............................................................................. [OK]
/iscsi/iqn.20...c:server/tpg1> cd portals
/iscsi/iqn.20.../tpg1/portals>  delete 0.0.0.0 3260
Deleted network portal 0.0.0.0:3260
/iscsi/iqn.20.../tpg1/portals> create 192.168.1.203 3260
Using default IP port 3260
Created network portal 192.168.1.203:3260.
/iscsi/iqn.20.../tpg1/portals> ls
o- portals .............................................................................. [Portals: 1]
  o- 192.168.1.203:3260 ......................................................................... [OK]

7）查看iscsi server配置

/iscsi/iqn.20...pip.cc:client> cd /
/> ls
o- / ........................................................................................... [...]
  o- backstores ................................................................................ [...]
  | o- block .................................................................... [Storage Objects: 2]
  | | o- idisk1 ............................................ [/dev/sdb (10.7GiB) write-thru activated]
  | | | o- alua ..................................................................... [ALUA Groups: 1]
  | | |   o- default_tg_pt_gp ......................................... [ALUA state: Active/optimized]
  | | o- idisk2 ........................................... [/dev/sdc (512.0MiB) write-thru activated]
  | |   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: 1]
  | o- iqn.2024-08.pip.cc:server ........................................................... [TPGs: 1]
  |   o- tpg1 ................................................................. [no-gen-acls, no-auth]
  |     o- acls ............................................................................ [ACLs: 1]
  |     | o- iqn.2024-08.pip.cc:client .............................................. [Mapped LUNs: 2]
  |     |   o- mapped_lun0 .................................................. [lun0 block/idisk1 (rw)]
  |     |   o- mapped_lun1 .................................................. [lun1 block/idisk2 (rw)]
  |     o- luns ............................................................................ [LUNs: 2]
  |     | o- lun0 ....................................... [block/idisk1 (/dev/sdb) (default_tg_pt_gp)]
  |     | o- lun1 ....................................... [block/idisk2 (/dev/sdc) (default_tg_pt_gp)]
  |     o- portals ...................................................................... [Portals: 1]
  |       o- 192.168.1.203:3260 ................................................................. [OK]
  o- loopback ........................................................................... [Targets: 0]
/> saveconfig
Last 10 configs saved in /etc/target/backup/.
Configuration saved to /etc/target/saveconfig.json
/> exit
Global pref auto_save_on_exit=true
Configuration saved to /etc/target/saveconfig.json

4、重启target服务

[root@node203 ~]# systemctl restart target
[root@node203 ~]# systemctl status target
● target.service - Restore LIO kernel target configuration
   Loaded: loaded (/usr/lib/systemd/system/target.service; disabled; vendor preset: disabled)
   Active: active (exited) since Fri 2024-08-02 10:50:45 CST; 4s ago
  Process: 18476 ExecStop=/usr/bin/targetctl clear (code=exited, status=0/SUCCESS)
  .......

5、配置客户端访问iscsi共享(all nodes)

iscsi-initiator-utils 提供了 iSCSI 客户端的工具和服务，用于管理和配置 iSCSI 连接。它包含了 iscsiadm 命令行工具和其他与 iSCSI 相关的组件。
主要功能和组件包括：

iscsiadm 命令行工具：iscsi-initiator-utils 包含了 iscsiadm 命令行工具，用于管理和配置 iSCSI 连接。您可以使用该工具来发现 iSCSI 目标、建立会话、断开连接、管理目标列表等。
iSCSI 服务：iscsi-initiator-utils 包含了 iSCSI 服务（通常是 iscsid 守护进程），它在后台运行并处理与 iSCSI 存储目标的通信。该服务负责管理 iSCSI 会话和设备，并提供与 iSCSI 目标的交互接口。
iSCSI 配置文件：iscsi-initiator-utils 提供了用于配置 iSCSI 客户端的配置文件。这些配置文件包含了 iSCSI 目标的信息、认证设置、会话选项等。您可以编辑这些配置文件来自定义 iSCSI 连接的行为。

1）客户端安装软件
[root@node201 ~]# yum install iscsi-initiator-utils-iscsiuio -y

2）配置iscsi配置文件
如下所示，在客户端配置访问server端认证文件：

[root@node201 ~]# cat /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2024-08.pip.cc:client
node.session.auth.authmethod = CHAP
node.session.auth.username = root
node.session.auth.password = 123456

启动服务：
[root@node201 ~]# systemctl restart iscsid
[root@node201 ~]# systemctl enable iscsid

3）客户端访问iscsi共享

# 查看iscsi共享
[root@node201 ~]# iscsiadm -m discovery -t st -p 192.168.1.203
192.168.1.203:3260,1 iqn.2024-08.pip.cc:server

# 建立到iscsi server的共享访问
[root@node201 ~]# iscsiadm -m node -T iqn.2024-08.pip.cc:server -p 192.168.1.203 --login
Logging in to [iface: default, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260] (multiple)
Login to [iface: default, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260] successful.

# 查看共享存储信息
[root@node201 ~]# lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda               8:0    0 102.9G  0 disk
├─sda1            8:1    0   500M  0 part /boot
└─sda2            8:2    0 102.4G  0 part
  ├─centos-root 253:0    0    50G  0 lvm  /
  ├─centos-swap 253:1    0     3G  0 lvm  [SWAP]
  └─centos-home 253:2    0  49.3G  0 lvm  /home
sdb               8:16   0  10.7G  0 disk
sdc               8:32   0   512M  0 disk
sr0              11:0    1  1024M  0 rom

# 如下所示，在客户端可以看到共享存储已作为本地磁盘访问
[root@node202 iscsi]# fdisk -l
Disk /dev/sdb: 11.5 GB, 11499421696 bytes, 22459808 sectors
......
Disk /dev/sdc: 536 MB, 536870912 bytes, 1048576 sectors
......
# 至此，共享存储配置完成。

4）通过udev对iscsi设备绑定

# 查看节点磁盘uuid
[root@node201 soft]# /usr/lib/udev/scsi_id -g -u /dev/sdb
360014052894c914c81040b4a87e59fb2
[root@node201 soft]# /usr/lib/udev/scsi_id -g -u /dev/sdc
36001405bcd67f428faf49eb9fc8c80dd

[root@node202 ~]# /usr/lib/udev/scsi_id -g -u /dev/sdb
360014052894c914c81040b4a87e59fb2
[root@node202 ~]# /usr/lib/udev/scsi_id -g -u /dev/sdc
36001405bcd67f428faf49eb9fc8c80dd

# 执行udev绑定
[root@node202 ~]# cat /etc/udev/rules.d/75-persist-iscsi.rules
KERNEL=="sd*",ENV{ID_SERIAL}=="360014052894c914c81040b4a87e59fb2",NAME:="qdisk",MODE:="0644"
KERNEL=="sd*",ENV{ID_SERIAL}=="36001405bcd67f428faf49eb9fc8c80dd",NAME:="kdata",MODE:="0644"

# 重启udev服务
[root@node201 soft]# systemctl restart systemd-udev-trigger
[root@node201 soft]# systemctl status systemd-udev-trigger
● systemd-udev-trigger.service - udev Coldplug all Devices
   Loaded: loaded (/usr/lib/systemd/system/systemd-udev-trigger.service; static; vendor preset: disabled)
   Active: active (exited) since Tue 2024-09-10 18:02:30 CST; 7s ago
     Docs: man:udev(7)
           man:systemd-udevd.service(8)
  Process: 27733 ExecStart=/usr/bin/udevadm trigger --type=devices --action=add (code=exited, status=0/SUCCESS)
  Process: 27732 ExecStart=/usr/bin/udevadm trigger --type=subsystems --action=add (code=exited, status=0/SUCCESS)
 Main PID: 27733 (code=exited, status=0/SUCCESS)

Sep 10 18:02:30 node201 systemd[1]: Stopped udev Coldplug all Devices.
Sep 10 18:02:30 node201 systemd[1]: Stopping udev Coldplug all Devices...
Sep 10 18:02:30 node201 systemd[1]: Starting udev Coldplug all Devices...
Sep 10 18:02:30 node201 systemd[1]: Started udev Coldplug all Devices.

附件：iscsi客户端清理iscsi挂载信息

1、查看客户端iscsid进程状态

如下所示，进程状态异常，出现iscsi尝试连接：

[root@node201 ~]# systemctl status iscsid
● iscsid.service - Open-iSCSI
   Loaded: loaded (/usr/lib/systemd/system/iscsid.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2024-09-02 19:31:54 CST; 3min 22s ago
  ......
 Main PID: 1077 (iscsid)
   Status: "Ready to process requests"
    Tasks: 1
   CGroup: /system.slice/iscsid.service
           └─1077 /sbin/iscsid -f

Sep 02 19:35:08 node201 iscsid[1077]: iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_...e (3)
Sep 02 19:35:09 node201 iscsid[1077]: iscsid: Kernel reported iSCSI connection 2:0 error (1020 - ISCSI_...e (3)
Sep 02 19:35:10 node201 iscsid[1077]: iscsid: connection1:0 is operational after recovery (1 attempts)
Sep 02 19:35:11 node201 iscsid[1077]: iscsid: connection2:0 is operational after recovery (1 attempts)
Sep 02 19:35:12 node201 iscsid[1077]: iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_...e (3)
Sep 02 19:35:13 node201 iscsid[1077]: iscsid: Kernel reported iSCSI connection 2:0 error (1020 - ISCSI_...e (3)
Sep 02 19:35:14 node201 iscsid[1077]: iscsid: connection1:0 is operational after recovery (1 attempts)
Sep 02 19:35:15 node201 iscsid[1077]: iscsid: connection2:0 is operational after recovery (1 attempts)
Sep 02 19:35:16 node201 iscsid[1077]: iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_...e (3)
Sep 02 19:35:17 node201 iscsid[1077]: iscsid: Kernel reported iSCSI connection 2:0 error (1020 - ISCSI_...e (3)
Hint: Some lines were ellipsized, use -l to show in full.

2、查看系统message日志

如下所示，系统message日志也出现大量iscsi重连信息：

[root@node201 ~]# tail /var/log/message:

Sep  2 17:14:38 node201 iscsid: iscsid: connection1:0 is operational after recovery (1 attempts)
Sep  2 17:14:40 node201 kernel: connection1:0: detected conn error (1020)
Sep  2 17:14:40 node201 iscsid: iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed) state (3)
Sep  2 17:14:42 node201 iscsid: iscsid: connection1:0 is operational after recovery (1 attempts)
Sep  2 17:14:44 node201 kernel: connection1:0: detected conn error (1020)
Sep  2 17:14:44 node201 iscsid: iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed) state (3)
Sep  2 17:14:46 node201 iscsid: iscsid: connection1:0 is operational after recovery (1 attempts)

3、查看iscsi server及客户端磁盘信息

[root@node201 ~]# iscsiadm -m discovery -t st -p 192.168.1.203
192.168.1.203:3260,1 iqn.2024-08.pip.cc:server


[root@node202 ~]# lsscsi
[1:0:0:0]    cd/dvd  VBOX     CD-ROM           1.0   /dev/sr0
[2:0:0:0]    disk    ATA      VBOX HARDDISK    1.0   /dev/sda
[5:0:0:0]    disk    LIO-ORG  idisk1           4.0   /dev/sdb
[5:0:0:1]    disk    LIO-ORG  idisk2           4.0   /dev/sdf
[5:0:0:2]    disk    LIO-ORG  idisk7           4.0   /dev/sdg
[5:0:0:3]    disk    LIO-ORG  idisk4           4.0   /dev/sde
[5:0:0:4]    disk    LIO-ORG  idisk5           4.0   /dev/sdd
[5:0:0:5]    disk    LIO-ORG  idisk6           4.0   /dev/sdc
[5:0:0:6]    disk    LIO-ORG  idisk8           4.0   /dev/sdh
[6:0:0:0]    disk    LIO-ORG  idisk1           4.0   /dev/sdi
[6:0:0:1]    disk    LIO-ORG  idisk2           4.0   /dev/sdm
[6:0:0:2]    disk    LIO-ORG  idisk7           4.0   /dev/sdn
[6:0:0:3]    disk    LIO-ORG  idisk4           4.0   /dev/sdl
[6:0:0:4]    disk    LIO-ORG  idisk5           4.0   /dev/sdk
[6:0:0:5]    disk    LIO-ORG  idisk6           4.0   /dev/sdj
[6:0:0:6]    disk    LIO-ORG  idisk8           4.0   /dev/sdo

4、清理iscsi客户端login

[root@node202 ~]# iscsiadm -m node --logoutall=all
Logging out of session [sid: 1, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260]
Logging out of session [sid: 2, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260]
Logout of [sid: 1, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260] successful.
Logout of [sid: 2, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260] successful.

# 查看client磁盘信息
[root@node202 ~]# lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda               8:0    0 102.9G  0 disk
├─sda1            8:1    0   500M  0 part /boot
└─sda2            8:2    0 102.4G  0 part
  ├─centos-root 253:0    0    50G  0 lvm  /
  ├─centos-swap 253:1    0     3G  0 lvm  [SWAP]
  └─centos-home 253:2    0  49.3G  0 lvm  /home
sr0              11:0    1  1024M  0 rom


[kingbase@node201 ~]$ lsscsi
[1:0:0:0]    cd/dvd  VBOX     CD-ROM           1.0   /dev/sr0
[2:0:0:0]    disk    ATA      VBOX HARDDISK    1.0   /dev/sda

5、iscsi client重新注册到iscsi server

[root@node201 ~]# /usr/sbin/iscsiadm -m node -T iqn.2024-08.pip.cc:server -p 192.168.1.203 --login
Logging in to [iface: default, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260] (multiple)
Login to [iface: default, target: iqn.2024-08.pip.cc:server, portal: 192.168.1.203,3260] successful.

# client磁盘信息
[root@node201 ~]# lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda               8:0    0 102.9G  0 disk
├─sda1            8:1    0   500M  0 part /boot
└─sda2            8:2    0 102.4G  0 part
  ├─centos-root 253:0    0    50G  0 lvm  /
  ├─centos-swap 253:1    0     3G  0 lvm  [SWAP]
  └─centos-home 253:2    0  49.3G  0 lvm  /home
sdb               8:16   0  10.7G  0 disk
sdc               8:32   0   8.3G  0 disk
sdd               8:48   0   2.2G  0 disk
sde               8:64   0   128M  0 disk
└─sde1            8:65   0    96M  0 part
sdf               8:80   0   512M  0 disk
sdg               8:96   0   128M  0 disk
sdh               8:112  0     4G  0 disk
sr0              11:0    1  1024M  0 rom

# 如下所示，日志信息正常
[root@node201 ~]#tail /var/log/message:

Sep  2 17:19:38 node201 kernel: scsi 6:0:0:6: alua: Attached
Sep  2 17:19:38 node201 kernel: sd 6:0:0:6: Attached scsi generic sg8 type 0
Sep  2 17:19:38 node201 kernel: sd 6:0:0:1: [sdf] Write cache: enabled, read cache: enabled, supports DPO and FUA
Sep  2 17:19:38 node201 kernel: sd 6:0:0:6: alua: transition timeout set to 60 seconds
Sep  2 17:19:38 node201 kernel: sd 6:0:0:6: alua: port group 00 state A non-preferred supports TOlUSNA
Sep  2 17:19:38 node201 kernel: sd 6:0:0:6: [sdh] 8388608 512-byte logical blocks: (4.29 GB/4.00 GiB)
Sep  2 17:19:38 node201 kernel: sd 6:0:0:2: [sdg] Write Protect is off
Sep  2 17:19:38 node201 kernel: sd 6:0:0:1: [sdf] Optimal transfer size 33550336 bytes
Sep  2 17:19:38 node201 kernel: sd 6:0:0:2: [sdg] Write cache: enabled, read cache: enabled, supports DPO and FUA

6、查看iscsid进程状态
如下所示，iscsid进程状态正常。

[root@node201 ~]# systemctl status iscsid
● iscsid.service - Open-iSCSI
   Loaded: loaded (/usr/lib/systemd/system/iscsid.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2024-09-02 19:36:59 CST; 24s ago
   ......
 Main PID: 4279 (iscsid)
   Status: "Ready to process requests"
    Tasks: 1
   CGroup: /system.slice/iscsid.service
           └─4279 /sbin/iscsid -f

Sep 02 19:36:59 node201 systemd[1]: Stopping Open-iSCSI...
Sep 02 19:36:59 node201 iscsid[3719]: iscsid: iscsid shutting down.
Sep 02 19:36:59 node201 systemd[1]: Stopped Open-iSCSI.
Sep 02 19:36:59 node201 systemd[1]: Starting Open-iSCSI...
Sep 02 19:36:59 node201 systemd[1]: Started Open-iSCSI.
Sep 02 19:37:19 node201 iscsid[4279]: iscsid: Connection3:0 to [target: iqn.2024-08.pip.cc:server, port...l now
Hint: Some lines were ellipsized, use -l to show in full.

posted @ 2024-09-03 10:49 天涯客1224 阅读(175) 评论(0) 编辑收藏举报

刷新页面返回顶部

天涯客1224

CentOS 7配置iSCSI共享存储案例

公告