ISCSI 存储部署——配置 （Target创建，Initiator连接）
2016-12-23 00:00
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1、 系统环境：ubuntu 14.10 Target : 172.16.0.100 Initiator: 172.16.0.101 172.16.0.102 2、100安装Target软件： root@ubuntu:~# apt-cache search tgt ... ... nagios-plugins-basic - Plugins for nagios compatible monitoring systems tgt - Linux SCSI target user-space tools epiphany-browser - Intuitive GNOME web browser ... python-webkit-dev - WebKit/Gtk Python bindings: development files 系统update后可通过search查看tgt软件 root@ubuntu:~# apt-get install tgt Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libboost-system1.54.0 libboost-thread1.54.0 libconfig-general-perl libibverbs1 libnspr4 libnss3 libnss3-nssdb librados2 librbd1 librdmacm1 libsgutils2-2 sg3-utils The following NEW packages will be installed: libboost-system1.54.0 libboost-thread1.54.0 libconfig-general-perl libibverbs1 libnspr4 libnss3 libnss3-nssdb librados2 librbd1 librdmacm1 libsgutils2-2 sg3-utils tgt 0 upgraded, 13 newly installed, 0 to remove and 0 not upgraded. Need to get 3,858 kB of archives. After this operation, 13.9 MB of additional disk space will be used. Do you want to continue? [Y/n] y 3、安装完毕后检查tgt运行状态 root@ubuntu:~# service tgt status tgt start/running, process 1964 tgt服务正在运行进程号 1964 root@ubuntu:~# ps aux |grep 1964 root 1964 0.0 0.3 261504 6444 ? Ssl 06:15 0:00 tgtd root 2296 0.0 0.1 8180 2072 pts/3 S+ 07:25 0:00 grep --color=auto 1964 4、tgtadmin help查看tgtadmin 命令参数 root@ubuntu:~# tgtadm --help Linux SCSI Target administration utility, version 1.0.43 Usage: tgtadm [OPTION] --lld <driver> --mode target --op new --tid <id> --targetname <name> add a new target with <id> and <name>. <id> must not be zero. --lld <driver> --mode target --op delete [--force] --tid <id> delete the specific target with <id>. With force option, the specific target is deleted even if there is an activity. --lld <driver> --mode target --op show show all the targets. --lld <driver> --mode target --op show --tid <id> show the specific target's parameters. --lld <driver> --mode target --op update --tid <id> --name <param> --value <value> change the target parameters of the target with <id>. --lld <driver> --mode target --op bind --tid <id> --initiator-address <address> --lld <driver> --mode target --op bind --tid <id> --initiator-name <name> enable the target to accept the specific initiators. --lld <driver> --mode target --op unbind --tid <id> --initiator-address <address> --lld <driver> --mode target --op unbind --tid <id> --initiator-name <name> disable the specific permitted initiators. --lld <driver> --mode logicalunit --op new --tid <id> --lun <lun> --backing-store <path> --bstype <type> --bsopts <bs options> --bsoflags <options> add a new logical unit with <lun> to the specific target with <id>. The logical unit is offered to the initiators. <path> must be block device files (including LVM and RAID devices) or regular files. bstype option is optional. bsopts are specific to the bstype. bsoflags supported options are sync and direct (sync:direct for both). --lld <driver> --mode logicalunit --op delete --tid <id> --lun <lun> delete the specific logical unit with <lun> that the target with <id> has. --lld <driver> --mode account --op new --user <name> --password <pass> add a new account with <name> and <pass>. --lld <driver> --mode account --op delete --user <name> delete the specific account having <name>. --lld <driver> --mode account --op bind --tid <id> --user <name> [--outgoing] add the specific account having <name> to the specific target with <id>. <user> could be <IncomingUser> or <OutgoingUser>. If you use --outgoing option, the account will be added as an outgoing account. --lld <driver> --mode account --op unbind --tid <id> --user <name> [--outgoing] delete the specific account having <name> from specific target. The --outgoing option must be added if you delete an outgoing account. --lld <driver> --mode lld --op start Start the specified lld without restarting the tgtd process. --control-port <port> use control port <port> --help display this help and exit Report bugs to <stgt@vger.kernel.org>. 5、创建 Target Tgtadmin 中关于 target命令如下： --lld <driver> --mode target --op new --tid <id> --targetname <name> add a new target with <id> and <name>. <id> must not be zero. --lld <driver> --mode target --op delete [--force] --tid <id> delete the specific target with <id>.With force option, the specific target is deleted even if there is an activity. --lld <driver> --mode target --op show show all the targets. 开始创建target root@ubuntu:~# tgtadm --lld iscsi --mode target --op new --tid 1 --targetname iqn.2014-0728.com:longtang #--lld iscsi 固定参数驱动iscsi #--mode target 模式target #--op new 操作new新创建 #--tid 1 target id号 #--targetname ...target名称 #查看Target记录</span> root@ubuntu:~# tgtadm --lld iscsi --mode target --op show Target 1: iqn.2014-0728.com:longtang 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 SWP: No Thin-provisioning: No Backing store type: null Backing store path: None Backing store flags: LUN: 1 Type: disk SCSI ID: IET 00010001 SCSI SN: beaf11 Size: 107373 MB, Block size: 512 Online: Yes Removable media: No Prevent removal: No Readonly: No SWP: No Thin-provisioning: No Backing store type: rdwr Backing store path: /dev/sdb1 Backing store flags: Account information: ACL information: ALL 参数会列出，默认创建LUN号为0 的逻辑单元 绑定 initiator name， 如果不操作 后续initiator可能无法发现target root@ubuntu:~# tgtadm --lld iscsi --mode target --op bind --tid 1 -I ALL 上面命令为任何 initiator都可以连接 该 target。 6、为Target新增逻辑单元 --lld <driver> --mode logicalunit --op new --tid <id> --lun <lun> --backing-store <path> --bstype <type> --bsopts <bs options> --bsoflags <options> add a new logical unit with <lun> to the specific target with <id>. The logical unit is offered to the initiators. <path> must be block device files <span style="color:#ff0000;">(including LVM and RAID devices)</span> or<span style="color:#ff0000;"> regular files</span>. bstype option is optional. bsopts are specific to the bstype. bsoflags supported options are sync and direct (sync:direct for both). --lld <driver> --mode logicalunit --op delete --tid <id> --lun <lun> delete the specific logical unit with <lun> that the target with <id> has. root@ubuntu:~# root@ubuntu:~# tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b /dev/sdb1 root@ubuntu:~# tgtadm --lld iscsi --mode target --op show Target 1: iqn.2014-0728.com:longtang 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 SWP: No Thin-provisioning: No Backing store type: null Backing store path: None Backing store flags: LUN: 1 Type: disk SCSI ID: IET 00010001 SCSI SN: beaf11 Size: 107373 MB, Block size: 512 Online: Yes Removable media: No Prevent removal: No Readonly: No SWP: No Thin-provisioning: No Backing store type: rdwr Backing store path: /dev/sdb1 Backing store flags: Account information: ACL information: ALL 创建逻辑单元号为1 的逻辑单元，；路径可以为LVM设备或者RAID设备，或者是文件，有时利用dd创建模拟文件可以作为Path 7、安装客户端软件 root@ubuntu:~# apt-get install open-iscsi Reading package lists... Done Building dependency tree ... 检查客户端运行状态，如果未运行则开启 root@ubuntu:~# service open-iscsi status Current active iSCSI sessions: iscsiadm: No active sessions. root@king:~# service open-iscsi start * Starting iSCSI initiator service iscsid iSCSI daemon already running 8、ISCSI客户端连接 Target 发现Target root@ubuntu:~# iscsiadm -m discovery -t sendtargets -p 172.16.0.100 172.16.0.100:3260,1 iqn.2001-04.com.example:storage.lun1.disk2.sys1.xyz 如果 target的initiator name 不绑定为 all 此处会无法发现 target 显示已发现 target root@ubuntu:~# iscsiadm -m node 172.16.0.100:3260,1 iqn.2001-04.com.example:storage.lun1.disk2.sys1.xyz 9、连接 Target root@ubuntu:~# iscsiadm -m node -p 172.16.0.100 --login Logging in to [iface: default, target: iqn.2001-04.com.example:storage.lun1.disk2.sys1.xyz, portal: 172.16.0.100,3260] (multiple) Login to [iface: default, target: iqn.2001-04.com.example:storage.lun1.disk2.sys1.xyz, portal: 172.16.0.100,3260] successful. 10、查看磁盘设备 root@ubuntu:~# ls /dev/sd* /dev/sda /dev/sda1 /dev/sda2 /dev/sda5 /dev/sdb /dev/sdb1 root@ubuntu:~# fdisk -l Disk /dev/sda: 60 GiB, 64424509440 bytes, 125829120 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 Disklabel type: dos Disk identifier: 0x8d75991a Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 121634815 121632768 58G 83 Linux /dev/sda2 121636862 125827071 4190210 2G 5 Extended /dev/sda5 121636864 125827071 4190208 2G 82 Linux swap / Solaris Disk /dev/sdb: 100 GiB, 107374182400 bytes, 209715200 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 Disklabel type: dos Disk identifier: 0xbfc71a9e Device Boot Start End Sectors Size Id Type /dev/sdb1 2048 209715199 209713152 100G 83 Linux 11、断开Target root@ubuntu:~# iscsiadm -m node -p 172.16.0.100 --logout Logging out of session [sid: 3, target: iqn.2001-04.com.example:storage.lun1.disk2.sys1.xyz, portal: 172.16.0.100,3260] Logout of [sid: 3, target: iqn.2001-04.com.example:storage.lun1.disk2.sys1.xyz, portal: 172.16.0.100,3260] successful. root@ubuntu:~# ls /dev/sd* /dev/sda /dev/sda1 /dev/sda2 /dev/sda5 11、如果担心指定IP什么太麻烦，直接接连 所有的 Target root@ubuntu:~# iscsiadm -m node --login all 注： ISCSI 端口号： root@ubuntu:~# netstat -anl |grep 3260 tcp 0 0 172.16.0.102:54978 172.16.0.100:3260 ESTABLISHED /etc/service 中也存在默认端口号 测试： 1、多点挂载：数据读写 同一块盘，多点挂载，两台clien挂载后 同时通过脚本插入数据到指定文本， 最终显示的数据是最先写入数据的clien 2、访问控制测试： Iscsi 在Server 端可以使用tgt 通过TCP/IP 控制IP地址的访问挂载 Tgtadmin所做的修改全都在内核中保存的， 重启服务器后所有的记录将会消失，若想自动生效，需要哦将配置写在 /etc/tgt/conf.d/ target.conf中。 配置内容如下： <target iqn.2001-04.com.example:storage.lun1.disk2.sys1.xyz> backing-store /dev/sdb1 initiator-address 172.16.0.102 </target> 说明：backing-store 共享出的块存储 Initiator-address 允许Initiator 访问的地址 3、磁盘扩容，经过测试，可以扩容 Server端扩容时， tgt连接必须先停掉， 否则无法进行扩容 4、若客户端在挂载的时候，断开Target root@ubuntu:~# iscsiadm -m node -p 172.16.0.100 –logout 挂载的分区不能读写： root@ubuntu:~# cd /opt/kevin/ root@ubuntu:/opt/kevin# ls ls: reading directory .: Input/output error root@ubuntu:/opt/kevin# cd 5、客户端： 查看Server共享出的磁盘空间为90Ｇ root@ubuntu:~# fdisk -l Disk /dev/sda: 60 GiB, 64424509440 bytes, 125829120 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 Disklabel type: dos Disk identifier: 0x8d75991a Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 121634815 121632768 58G 83 Linux /dev/sda2 121636862 125827071 4190210 2G 5 Extended /dev/sda5 121636864 125827071 4190208 2G 82 Linux swap / Solaris Disk /dev/sdb: 90 GiB, 96635715584 bytes, 188741632 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 Disklabel type: dos Disk identifier: 0x00000000 挂载后，发现空间还是原来的 １９Ｇ root@ubuntu:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 57G 4.1G 51G 8% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 988M 4.0K 988M 1% /dev tmpfs 201M 488K 200M 1% /run none 5.0M 0 5.0M 0% /run/lock none 1001M 0 1001M 0% /run/shm none 100M 0 100M 0% /run/user /dev/sdb 19G 45M 18G 1% /opt/kevin 客户端也需要手动进行扩容分区大小 root@ubuntu:~# resize2fs /dev/sdb 88G resize2fs 1.42.10 (18-May-2014) Please run 'e2fsck -f /dev/sdb' first. 请检查磁盘的可用性 ——————————————————————————————————————— root@ubuntu:~# e2fsck -f /dev/sdb e2fsck 1.42.10 (18-May-2014) Resize inode not valid. Recreate<y>? yes Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information Free blocks count wrong for group #0 (31220, counted=31221). Fix<y>? yes Free blocks count wrong (4858522, counted=4858523). Fix<y>? yes /dev/sdb: ***** FILE SYSTEM WAS MODIFIED ***** /dev/sdb: 14/1245184 files (0.0% non-contiguous), 122213/4980736 blocks root@ubuntu:~# resize2fs /dev/sdb 90G resize2fs 1.42.10 (18-May-2014) The containing partition (or device) is only 23592704 (4k) blocks. You requested a new size of 23592960 blocks. 扩容磁盘，值不能超出总块值大小 root@ubuntu:~# resize2fs /dev/sdb 88G resize2fs 1.42.10 (18-May-2014) Resizing the filesystem on /dev/sdb to 23068672 (4k) blocks. The filesystem on /dev/sdb is now 23068672 blocks long. 查看是否扩容成功 root@ubuntu:~# mount /dev/sdb /opt/kevin/ root@ubuntu:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 57G 4.1G 51G 8% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 988M 4.0K 988M 1% /dev tmpfs 201M 488K 200M 1% /run none 5.0M 0 5.0M 0% /run/lock none 1001M 0 1001M 0% /run/shm none 100M 0 100M 0% /run/user /dev/sdb 87G 56M 83G 1% /opt/kevin 完成 注意：客户端可以进行格式化磁盘, 格式化后的磁盘会直接影响Server端对应盘的数据 6、扩容磁盘时，server 端将tgt停掉，加磁盘空间后，进行重新分区，重新扩展分区大小，检查文件系统正确性。 客户端 1、重新分区 root@ubuntu:~# fdisk /dev/sdb root@ubuntu:~# fdisk -l root@ubuntu:~# resize2fs /dev/sdb1 59G root@ubuntu:~# e2fsck -f /dev/sdb1 挂载后若出现旧的空间，卸载后重新resize mount /dev/sdb1 /opt/kevin/ df -h resize2fs /dev/sdb1 59G e2fsck -f /dev/sdb1 然后就显示新的空间 root@ubuntu:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 57G 4.1G 51G 8% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 988M 4.0K 988M 1% /dev tmpfs 201M 484K 200M 1% /run none 5.0M 0 5.0M 0% /run/lock none 1001M 0 1001M 0% /run/shm none 100M 0 100M 0% /run/user /dev/sdb1 58G 52M 56G 1% /opt/kevin 需要 检测文件系统的正确性 root@ubuntu:~# e2fsck -f /dev/sdb1 7、Server端可以同时分享出多个分区空间; clien端都可以分别挂载 root@ubuntu:~# mount /dev/sdb1 /opt/kevin/ root@ubuntu:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 57G 4.1G 51G 8% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 988M 4.0K 988M 1% /dev tmpfs 201M 496K 200M 1% /run none 5.0M 0 5.0M 0% /run/lock none 1001M 0 1001M 0% /run/shm none 100M 0 100M 0% /run/user /dev/sdd 20G 244M 19G 2% /tmp/zzzzzzzzzzzz /dev/sdc 976M 202M 708M 23% /tmp/aaa /dev/sdb1 9.8G 23M 9.2G 1% /opt/kevin
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