ISCSI共享存储配置跟parted命令简述

ISCSI共享存储配置跟parted命令简述

2013-05-12 11:01:50

标签：存储 iscsi Linux共享存储

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ISCSI 术语

IQN： ISCSI合格名称,格式：iqn.YYYY-MM.com.clovem.www:stro_name              ==>主机名倒着写

Target：ISCSI存储服务器

Initiator：使用Target的节点，前端节点

Node：ISCSI存储服务器或者前端节点

Portal：ISCSI的访问入口，ISCSI存储的端口

ISCSI Target： node4

1.安装scsi-target-utils  //服务端程序

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[root@node4 ~]# yum  install scsi-target-utils -y [root@node4 ~]# vgs   VG    #PV #LV #SN Attr   VSize VFree   vgsrv   1   3   0 wz--n- 8.78g 4.69g [root@node4 ~]# lvcreate  -L 1GB  -n  lv0   vgsrv   Logical volume "lv0" created [root@node4 ~]# lvs   LV   VG    Attr   LSize   Origin Snap%  Move Log Copy%  Convert   home vgsrv -wi-ao 256.00m                                      lv0  vgsrv -wi-a-   1.00g                                      root vgsrv -wi-ao   3.31g                                      swap vgsrv -wi-ao 544.00m                                    [root@node4 ~]# ls /dev/vgsrv/lv0 /dev/vgsrv/lv0

2.编辑 /etc/tgt/targets.conf,复制38-40行，粘贴如下

[root@node4 ~]# vi /etc/tgt/targets.conf

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backing-store /dev/vgsrv/lv0

3. 启动tgtd服务，查看设备是否被导出

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[root@node4 ~]# service tgtd start Starting SCSI target daemon:                               [  OK  ] [root@node4 ~]# tgt-admin  --show Target 1: iqn.2013-05.com.clovem:target1     System information:         Driver: iscsi         State: ready     I_T nexus information:     LUN information:         LUN: 0             Type: controller             SCSI ID: IET     00010000             SCSI SN: beaf10             Size: 0 MB, Block size: 1             Online: Yes             Removable media: No             Readonly: No             Backing store type: null             Backing store path: None             Backing store flags:         LUN: 1             Type: disk             SCSI ID: IET     00010001             SCSI SN: beaf11             Size: 1074 MB, Block size: 512             Online: Yes             Removable media: No             Readonly: No             Backing store type: rdwr             Backing store path: /dev/vgsrv/lv0             Backing store flags:     Account information:     ACL information:         ALL

4.查看Target1后面的LUN:1是我们导出的设备：/dev/vgsrv/lv0

ISCSI Initiator:desktop26

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[root@desktop26 ~]# rpm -q iscsi-initiator-utils iscsi-initiator-utils-6.2.0.872-34.el6.x86_64 [root@desktop26 ~]# which iscsiadm /sbin/iscsiadm

1.启用发现并登录

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[root@desktop26 ~]# ls /dev/sd* /dev/sda  /dev/sda1  /dev/sda2  /dev/sda3 [root@desktop26 ~]# iscsiadm  -m discovery -t sendtargets  -p 172.18.26.4:3260 172.18.26.4:3260,1 iqn.2013-05.com.clovem:target1 [root@desktop26 ~]# iscsiadm  -m node -T iqn.2013-05.com.clovem:target1 -l Logging in to [iface: default, target: iqn.2013-05.com.clovem:target1, portal: 172.18.26.4,3260] (multiple) Login to [iface: default, target: iqn.2013-05.com.clovem:target1, portal: 172.18.26.4,3260] successful. [root@desktop26 ~]# ls /dev/sd* /dev/sda  /dev/sda1  /dev/sda2  /dev/sda3  /dev/sdb [root@desktop26 ~]# ls /dev/disk/by-path/ ip-172.18.26.4:3260-iscsi-iqn.2013-05.com.clovem:target1-lun-1  pci-0000:00:07.1-scsi-1:0:1:0-part1 pci-0000:00:07.1-scsi-1:0:0:0                                   pci-0000:00:07.1-scsi-1:0:1:0-part2 pci-0000:00:07.1-scsi-1:0:1:0                                   pci-0000:00:07.1-scsi-1:0:1:0-part3

2. 通过iscsiadm命令查看是否导入成功

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[root@desktop26 ~]# iscsiadm  -m session  -P1 Target: iqn.2013-05.com.clovem:target1     Current Portal: 172.18.26.4:3260,1     Persistent Portal: 172.18.26.4:3260,1         **********         Interface:         **********         Iface Name: default         Iface Transport: tcp         Iface Initiatorname: iqn.1994-05.com.redhat:59585542a2c         Iface IPaddress: 172.18.26.254         Iface HWaddress:         Iface Netdev:         SID: 2         iSCSI Connection State: LOGGED IN         iSCSI Session State: LOGGED_IN         Internal iscsid Session State: NO CHANGE

3.修改Initiator端名，尽量做在发现跟登入前

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[root@desktop26 ~]# cat /etc/iscsi/initiatorname.iscsi InitiatorName=iqn.2013-05.com.clovem:node1 [root@desktop26 ~]# iscsiadm  -m node -T iqn.2013-05.com.clovem:target1 -u Logging out of session [sid: 10, target: iqn.2013-05.com.clovem:target1, portal: 172.18.26.4,3260] Logout of [sid: 10, target: iqn.2013-05.com.clovem:target1, portal: 172.18.26.4,3260] successful. [root@desktop26 ~]# service iscsid stop Stopping iscsid: [root@desktop26 ~]# iscsiadm  -m discovery -t sendtargets  -p 172.18.26.4:3260 Starting iscsid:                                           [  OK  ] 172.18.26.4:3260,1 iqn.2013-05.com.clovem:target1 [root@desktop26 ~]# iscsiadm  -m node -T iqn.2013-05.com.clovem:target1 -l Logging in to [iface: default, target: iqn.2013-05.com.clovem:target1, portal: 172.18.26.4,3260] (multiple) Login to [iface: default, target: iqn.2013-05.com.clovem:target1, portal: 172.18.26.4,3260] successful. [root@desktop26 ~]# iscsiadm  -m session -P1 Target: iqn.2013-05.com.clovem:target1     Current Portal: 172.18.26.4:3260,1     Persistent Portal: 172.18.26.4:3260,1         **********         Interface:         **********         Iface Name: default         Iface Transport: tcp         Iface Initiatorname: iqn.2013-05.com.clovem:node1         Iface IPaddress: 172.18.26.254         Iface HWaddress:         Iface Netdev:         SID: 11         iSCSI Connection State: LOGGED IN         iSCSI Session State: LOGGED_IN         Internal iscsid Session State: NO CHANGE

现在可以看到Iface Initiatorname: iqn.2013-05.com.clovem:node1 ，修改成功，一般情况下面在导入设备之前就修改客户端设备名。

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回到node4中查看状态，可以看到客户端设备名了

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[root@node4 ~]# tgt-admin  --show Target 1: iqn.2013-05.com.clovem:target1     System information:         Driver: iscsi         State: ready     I_T nexus information:         I_T nexus: 11             Initiator: iqn.2013-05.com.clovem:node1             Connection: 0                 IP Address: 172.18.26.254     LUN information:         LUN: 0             Type: controller             SCSI ID: IET     00010000             SCSI SN: beaf10             Size: 0 MB, Block size: 1             Online: Yes             Removable media: No             Readonly: No             Backing store type: null             Backing store path: None             Backing store flags:         LUN: 1             Type: disk             SCSI ID: IET     00010001             SCSI SN: beaf11             Size: 1074 MB, Block size: 512             Online: Yes             Removable media: No             Readonly: No             Backing store type: rdwr             Backing store path: /dev/vgsrv/lv0             Backing store flags:     Account information:     ACL information:         ALL

定义服务端导出设备属性以及访问控制，修改/etc/tgt/target.conf

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< backing-store /dev/vgsrv/lv0>         vendor-id       clovemfong, Inc.         scsi_id         target1         scsi_sn         s01            initiator-address       172.18.26.254

重新加载配置文件：service tgtd force-reload //由于当前有客户端登入，需要强制重载配置文

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[root@node4 ~]# tgt-admin  --show Target 1: iqn.2013-05.com.clovem:target1     System information:         Driver: iscsi         State: ready     I_T nexus information:         I_T nexus: 1             Initiator: iqn.2013-05.com.clovem:node1             Connection: 0                 IP Address: 172.18.26.254     LUN information:         LUN: 0             Type: controller             SCSI ID: IET     00010000             SCSI SN: beaf10             Size: 0 MB, Block size: 1             Online: Yes             Removable media: No             Readonly: No             Backing store type: null             Backing store path: None             Backing store flags:         LUN: 1             Type: disk             SCSI ID: target1             SCSI SN: s01             Size: 1074 MB, Block size: 512             Online: Yes             Removable media: No             Readonly: No             Backing store type: rdwr             Backing store path: /dev/vgsrv/lv0             Backing store flags:     Account information:     ACL information:         172.18.26.254

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如果ISCSI存储设备容量>=2TB,就不能够使用常规的fdisk 命令进行磁盘的分区了(其分区表格式为msdos)，需要使用parted，其分区表格式为GPT

命令：

parted  /dev/sdb  print //查看分区

parted  /dev/sdb  mklabel gpt    //转换格式(msdos gpt)

parted  /dev/sdb mkpart primary 1m 100m //创建起始大小为1M，结束为100M的名为primary的分区

分区改名：

parted  /dev/sdb name  2 ' "Linux FileSystem" '  //对2号分区改名  

parted  -s /dev/sdb mkfs 1 ext4   //将1号分区格式化为ext4文件系统,测试发现不支持ext4如此格式化，仅仅默认支持ext2,所以通过mkfs.ext4命令进行格式化即可。

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[root@desktop26 ~]# parted  /dev/sdb mklabel gpt Warning: The existing disk label on /dev/sdb will be destroyed and all data on this disk will be lost. Do you want to continue? Yes/No? Yes                                                             Information: You may need to update /etc/fstab.                         [root@desktop26 ~]# parted  /dev/sdb mkpart rh436 200m 300m Information: You may need to update /etc/fstab.                         [root@desktop26 ~]# parted  /dev/sdb print Model: IET VIRTUAL-DISK (scsi) Disk /dev/sdb: 1074MB Sector size (logical/physical): 512B/512B Partition Table: gpt Number  Start  End    Size    File system  Name   Flags  1      200MB  300MB  99.6MB               rh436 [root@desktop26 ~]# mkfs.ext4 /dev/sdb1  > /dev/null  2>&1 [root@desktop26 ~]# parted  /dev/sdb print Model: IET VIRTUAL-DISK (scsi) Disk /dev/sdb: 1074MB Sector size (logical/physical): 512B/512B Partition Table: gpt Number  Start  End    Size    File system  Name   Flags  1      200MB  300MB  99.6MB  ext4         rh436 [root@desktop26 ~]# mkdir /rh436 ; mount /dev/sdb1  /rh436 ; df -H |grep rh436 /dev/sdb1               97M   5.8M    86M   7% /rh436

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