linux下搭建ISCSI服务器.doc

三种存储网络：DAS：本地存储网络。【本地磁盘】SAN：存储域网络。 【光纤信道|以太网通道】NAS：网络系统文件。【普通协议】Iscsi：scsi over tcp/ip上的，物理层：GB以太网卡 数据链路层：网络层：IP 传输层：3260共享方式：采用DD的方式新建一个镜像盘，单一设备，完整磁盘，单一分区，LVM，可以是SAN网络。查看安装：rootwmm # rpm -aq|grep scsi-target-utils【服务器端】scsi-target-utils-1.0.24-2.el6.x86_64rootwmm # rpm -aq|grep scsi-initial-utilsrootwmm # yum -y install scsi-initial-utils采用文件镜像作为iscsi-targetrootwmm # dd if=/dev/zero of=/srv/iscsi/disk1.img bs=1M count=500记录了500+0 的读入记录了500+0 的写出524288000字节(524 MB)已复制，13.4097 秒，39.1 MB/秒rootwmm # fdisk /dev/sdbWARNING: DOS-compatible mode is deprecated. Its strongly recommended to switch off the mode (command c) and change display units to sectors (command u).Command (m for help): nCommand action e extended p primary partition (1-4)pPartition number (1-4): 1First cylinder (1-2610, default 1): Using default value 1Last cylinder, +cylinders or +sizeK,M,G (1-2610, default 2610): +1000MCommand (m for help): wqThe partition table has been altered!Calling ioctl() to re-read partition table.Syncing disks.rootwmm # partprobe【更新到内核中】Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (设备或资源忙). As a result, it may not reflect all of your changes until after reboot.创建LVrootwmm # partprobeWarning: WARNING: the kernel failed to re-read the partition table on /dev/sda (设备或资源忙). As a result, it may not reflect all of your changes until after reboot.rootwmm # pvcreate /dev/sdb1 Writing physical volume data to disk /dev/sdb1 Physical volume /dev/sdb1 successfully created创建VGrootwmm # vgcreate server /dev/sdb1 Volume group server successfully created创建LVrootwmm # lvcreate -L 1G -n iscsi01 server【可以采用500PE】rootwmm # service iptables stopiptables：清除防火墙规则： 确定iptables：将链设置为政策 ACCEPT：nat mangle filter 确定iptables：正在卸载模块： 编辑配置文件：rootwmm # vim /etc/tgt/targets.conf【目标|标准查询|日期|主机名|共享名】backing-store /dev/sdb2【设备一】backing-store /srv/iscsi/disk1.img【镜像名】backing-store /dev/server/iscsi01【设备绿】【backing-store:虚拟设备|direct-store：实际设备，如果整个磁盘做位存储就选直接存储】采用虚机存储有三种方式：分区，dd的大磁盘文件，LV。Initiator-address：允许发现的地址Incominguser:允许进入的用户名密码。Write-cache：用于加速的缓存，容易丢失数据。启动服务：rootwmm # /etc/init.d/tgtd start正在启动 SCSI target daemon： 确定tgtadm: invalid requestCommand:tgtadm -C 0 -lld iscsi -op new -mode logicalunit -tid 1 -lun 2 -b /srv/iscsi/disk1.img exited with code: 22.rootwmm # chkconfig tgtd on【开机启动】查看端口是否开启：rootwmm # netstat -tulnp|grep 3260tcp 0 0 :3260 :* LISTEN 25605/tgtd tcp 0 0 :3260 :* LISTEN 25605/tgtd rootwmm # tgt-admin -show【查看一下设备】Target 1: :wmmdisk 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 Prevent removal: 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: 1053 MB, Block size: 512 Online: Yes Removable media: No Prevent removal: No Readonly: No Backing store type: rdwr Backing store path: /dev/sdb2 Backing store flags: LUN: 2 Type: disk SCSI ID: IET 00010002 SCSI SN: beaf12 Size: 1074 MB, Block size: 512 Online: Yes Removable media: No Prevent removal: No Readonly: No Backing store type: rdwr Backing store path: /dev/server/iscsi02 Backing store flags: Account information:ACL information:Linux客户端设置：rootwmm # service iscsid restart停止 iscsid：正在启动 iscsid： 确定rootwmm # chkconfig iscsid on【开机启动】如果是linux客户端，完整的步骤如下：rootwmm # /etc/init.d/iscsi restart停止 iscsi： 确定正在启动 iscsi： 确定rootwmm # chkconfig iscsi on【设置开机自动启动】rootwmm # iscsiadm -m discovery -t sendtargets -p 【发现和侦测】:3260,1 :wmmdiskrootwmm # /etc/init.d/iscsi restart停止 iscsi： 确定正在启动 iscsi： 确定rootwmm # iscsiadm -m node【发现节点】:3260,1 :wmmdiskrootwmm # fdisk -l【如果你发现有另外的盘，就表示挂载上了啊！格式化，挂载即可，我们可以再一次整合成为VG】rootwmm # pvcreate /dev/sdd,e Writing physical volume data to disk /dev/sdd Physical volume /dev/sdd successfully created Writing physical volume data to disk /dev/sde Physical volume /dev/sde successfully createdrootwmm # vgextend server /dev/sdd,e Found duplicate PV 0Q9P5AuDQxwM6SeM817n1xUVjUun1jkv: using /dev/sdd not /dev/sdb2 Found duplicate PV 0Q9P5AuDQxwM6SeM817n1xUVjUun1jkv: using /dev/sdb2 not /dev/sdd Found duplicate PV 0Q9P5AuDQxwM6SeM817n1xUVjUun1jkv: using /dev/sdd not /dev/sdb2 No physical volume label read from /dev/sde Writing physical volume data to disk /dev/sde Physical volume /dev/sde successfully created Volume group server successfully extendedrootwmm # vgdisplayrootwmm # lvcreate -L 700 -n wmmdisk server Found duplicate PV 0Q9P5AuDQxwM6SeM817n1xUVjUun1jkv: using /dev/sdd not /dev/sdb2 Logical volume wmmdisk createdrootwmm # lvdisplay 格式化：rootwmm # mkfs.ext4 /dev/server/wmmdisk mke2fs 1.41.12 (17-May-2010)文件系统标签=操作系统:Linux块大小=4096 (log=2)分块大小=4096 (log=2)Stride=0 blocks, Stripe width=0 blocks44832 inodes, 179200 blocks8960 blocks (5.00%) reserved for the super user第一个数据块=0Maximum filesystem blocks=1845493766 block groups32768 blocks per group, 32768 fragments per group7472 inodes per groupSuperblock backups stored on blocks: 32768, 98304, 163840正在写入inode表: 完成 Creati