iscsi的共享
1、概述
iSCSI技术实现了物理硬盘设备与TCP/TP网络传输协议的相互结合，使得用户可以通过互联网方便的获取到远程机房提供的共享存储资源
2、iscsi的部署
先建立一个分区 实验用
后下载服务
[root@localhost network-scripts]# fdisk -l
Disk /dev/vda: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x00013f3e
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 20970332 10484142+ 83 Linux
Disk /dev/vdb: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x09ee18d7
Device Boot Start End Blocks Id System
/dev/vdb1 2048 1026047 512000 8e Linux LVM
Disk /dev/mapper/vg0-vo: 520 MB, 520093696 bytes, 1015808 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
[root@localhost network-scripts]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/vdb: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x09ee18d7
Device Boot Start End Blocks Id System
/dev/vdb1 2048 1026047 512000 8e Linux LVM
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (2-4, default 2):
First sector (1026048-20971519, default 1026048):
Using default value 1026048
Last sector, +sectors or +size{K,M,G} (1026048-20971519, default 20971519): +1G
Partition 2 of type Linux and of size 1 GiB is set
Command (m for help): p
Disk /dev/vdb: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x09ee18d7
Device Boot Start End Blocks Id System
/dev/vdb1 2048 1026047 512000 8e Linux LVM
/dev/vdb2 1026048 3123199 1048576 83 Linux
Command (m for help): wq
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@localhost network-scripts]# partprobe
[root@localhost network-scripts]# yum install targetcli -y
Loaded plugins: langpacks
Repository 'rhel_dvd' is missing name in configuration, using id
Resolving Dependencies
--> Running transaction check
---> Package targetcli.noarch 0:2.1.fb34-1.el7 will be installed
--> Processing Dependency: python-rtslib >= 2.1.fb41 for package: targetcli-2.1.fb34-1.el7.noarch
--> Processing Dependency: python-configshell for package: targetcli-2.1.fb34-1.el7.noarch
--> Running transaction check
---> Package python-configshell.noarch 1:1.1.fb11-3.el7 will be installed
--> Processing Dependency: pyparsing for package: 1:python-configshell-1.1.fb11-3.el7.noarch
--> Processing Dependency: python-urwid for package: 1:python-configshell-1.1.fb11-3.el7.noarch
---> Package python-rtslib.noarch 0:2.1.fb46-1.el7 will be installed
--> Processing Dependency: python-kmod for package: python-rtslib-2.1.fb46-1.el7.noarch
--> Running transaction check
---> Package pyparsing.noarch 0:1.5.6-9.el7 will be installed
---> Package python-kmod.x86_64 0:0.9-4.el7 will be installed
---> Package python-urwid.x86_64 0:1.1.1-3.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
============================================================================================
Package Arch Version Repository Size
============================================================================================
Installing:
targetcli noarch 2.1.fb34-1.el7 rhel_dvd 55 k
Installing for dependencies:
pyparsing noarch 1.5.6-9.el7 rhel_dvd 94 k
python-configshell noarch 1:1.1.fb11-3.el7 rhel_dvd 64 k
python-kmod x86_64 0.9-4.el7 rhel_dvd 57 k
python-rtslib noarch 2.1.fb46-1.el7 rhel_dvd 75 k
python-urwid x86_64 1.1.1-3.el7 rhel_dvd 654 k
Transaction Summary
============================================================================================
Install 1 Package (+5 Dependent packages)
Total download size: 998 k
Installed size: 3.9 M
Downloading packages:
(1/6): pyparsing-1.5.6-9.el7.noarch.rpm | 94 kB 00:00:00
(2/6): python-configshell-1.1.fb11-3.el7.noarch.rpm | 64 kB 00:00:00
(3/6): python-kmod-0.9-4.el7.x86_64.rpm | 57 kB 00:00:00
(4/6): python-rtslib-2.1.fb46-1.el7.noarch.rpm | 75 kB 00:00:00
(5/6): python-urwid-1.1.1-3.el7.x86_64.rpm | 654 kB 00:00:00
(6/6): targetcli-2.1.fb34-1.el7.noarch.rpm | 55 kB 00:00:00
--------------------------------------------------------------------------------------------
Total 4.2 MB/s | 998 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : python-kmod-0.9-4.el7.x86_64 1/6
Installing : python-rtslib-2.1.fb46-1.el7.noarch 2/6
Installing : pyparsing-1.5.6-9.el7.noarch 3/6
Installing : python-urwid-1.1.1-3.el7.x86_64 4/6
Installing : 1:python-configshell-1.1.fb11-3.el7.noarch 5/6
Installing : targetcli-2.1.fb34-1.el7.noarch 6/6
Verifying : python-rtslib-2.1.fb46-1.el7.noarch 1/6
Verifying : python-urwid-1.1.1-3.el7.x86_64 2/6
Verifying : targetcli-2.1.fb34-1.el7.noarch 3/6
Verifying : 1:python-configshell-1.1.fb11-3.el7.noarch 4/6
Verifying : pyparsing-1.5.6-9.el7.noarch 5/6
Verifying : python-kmod-0.9-4.el7.x86_64 6/6
Installed:
targetcli.noarch 0:2.1.fb34-1.el7
Dependency Installed:
pyparsing.noarch 0:1.5.6-9.el7 python-configshell.noarch 1:1.1.fb11-3.el7
python-kmod.x86_64 0:0.9-4.el7 python-rtslib.noarch 0:2.1.fb46-1.el7
python-urwid.x86_64 0:1.1.1-3.el7
Complete!
[root@localhost network-scripts]# systemctl start target ## 开启服务
3、使用服务
[root@localhost network-scripts]# targetcli
Warning: Could not load preferences file /root/.targetcli/prefs.bin.
targetcli shell version 2.1.fb34
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.
/>
添加共享
/> ls ##查看
o- / ................................................................................. [...]
o- backstores ...................................................................... [...]
| o- block .......................................................... [Storage Objects: 0]
| o- fileio ......................................................... [Storage Objects: 0]
| o- pscsi .......................................................... [Storage Objects: 0]
| o- ramdisk ........................................................ [Storage Objects: 0]
o- iscsi .................................................................... [Targets: 0]
o- loopback ................................................................. [Targets: 0]
/> /backstores/block create westos:storage1 /dev/vdb2 ##添加设备
Created block storage object westos:storage1 using /dev/vdb2.
/> /iscsi create iqn.2018-06.com.example:storage1 ##创建iscsi限定名称 格式为iqn.年-月.域名反写:label标示
Created target iqn.2018-06.com.example:storage1.
Created TPG 1.
/> ls
o- / ................................................................................. [...]
o- backstores ...................................................................... [...]
| o- block .......................................................... [Storage Objects: 1]
| | o- westos:storage1 ....................... [/dev/vdb2 (1.0GiB) write-thru deactivated]
| o- fileio ......................................................... [Storage Objects: 0]
| o- pscsi .......................................................... [Storage Objects: 0]
| o- ramdisk ........................................................ [Storage Objects: 0]
o- iscsi .................................................................... [Targets: 1]
| o- iqn.2018-06.com.example:storage1 .......................................... [TPGs: 1]
| o- tpg1 ....................................................... [no-gen-acls, no-auth]
| o- acls .................................................................. [ACLs: 0]
| o- luns .................................................................. [LUNs: 0]
| o- portals ............................................................ [Portals: 0]
o- loopback ................................................................. [Targets: 0]
/>
/> /iscsi/iqn.2018-06.com.example:storage1/tpg1/acls create iqn.2018-06.com.example:westoskey
Created Node ACL for iqn.2018-06.com.example:westoskey 创建acl密钥
/> /iscsi/iqn.2018-06.com.example:storage1/tpg1/luns create /backstores/block/westos:storage1
Created LUN 0. 密钥和设备关联
Created LUN 0->0 mapping in node ACL iqn.2018-06.com.example:westoskey
/> /iscsi/iqn.2018-06.com.example:storage1/tpg1/portals create 172.25.254.66
Using default IP port 3260
Created network portal 172.25.254.66:3260.
/> /iscsi/iqn.2018-06.com.example:storage1/tpg1/portals create 172.25.254.166 开放端口
Using default IP port 3260
Created network portal 172.25.254.166:3260.
/> exit
Global pref auto_save_on_exit=true
Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json
[root@foundation66 ~]# iscsiadm -m discovery -t st -p 172.25.254.166
172.25.254.66:3260,1 iqn.2018-06.com.example:storage1
172.25.254.166:3260,1 iqn.2018-06.com.example:storage1
- 客户端发现设备
- ####-t 类型 -p IP端口
[root@foundation66 ~]# iscsiadm -m node -T iqn.2018-06.com.example:storage1 -p 172.25.254.166 -l
Logging in to [iface: default, target: iqn.2018-06.com.example:storage1, portal: 172.25.254.166,3260] (multiple)
iscsiadm: Could not login to [iface: default, target: iqn.2018-06.com.example:storage1, portal: 172.25.254.166,3260].
iscsiadm: initiator reported error (24 - iSCSI login failed due to authorization failure)
iscsiadm: Could not log into all portals
登陆设备失败，需要在配置文件中添加密钥
[root@foundation66 ~]# vim /etc/iscsi/initiatorname.iscsi
[root@foundation66 ~]# systemctl restart iscsid.service
[root@foundation66 ~]# iscsiadm -m discovery -t st -p 172.25.254.166
172.25.254.66:3260,1 iqn.2018-06.com.example:storage1
172.25.254.166:3260,1 iqn.2018-06.com.example:storage1
[root@foundation66 ~]# iscsiadm -m node -T iqn.2018-06.com.example:storage1 -p 172.25.254.166 -l
Logging in to [iface: default, target: iqn.2018-06.com.example:storage1, portal: 172.25.254.166,3260] (multiple)
Login to [iface: default, target: iqn.2018-06.com.example:storage1, portal: 172.25.254.166,3260] successful.
[root@foundation66 ~]#
登陆成功
Disk /dev/sdc: 1073 MB, 1073741824 bytes, 2097152 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 4194304 bytes
发现共享设备
Disk /dev/sdc: 1073 MB, 1073741824 bytes, 2097152 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 4194304 bytes
[root@foundation66]# fdisk /dev/sda
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x759cd7b5.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (8192-4194303, default 8192):
Using default value 8192
Last sector, +sectors or +size{K,M,G} (8192-4194303, default 4194303): +500M
Partition 1 of type Linux and of size 500 MiB is set
Command (m for help): p
Disk /dev/sda: 2147 MB, 2147483648 bytes, 4194304 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 4194304 bytes
Disk label type: dos
Disk identifier: 0x759cd7b5
Device Boot Start End Blocks Id System
/dev/sda1 8192 1032191 512000 83 Linux
Command (m for help): wq
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@foundation66]# partprobe
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
[root@foundation66]# mkfs.xfs /dev/sda1
meta-data=/dev/sda1 isize=256 agcount=8, agsize=16000 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=128000, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal log bsize=4096 blocks=853, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@foundation66]# mount /dev/sda1 /mnt/
[root@foundation66]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/vda1 10473900 3159092 7314808 31% /
devtmpfs 927072 0 927072 0% /dev
tmpfs 942660 80 942580 1% /dev/shm
tmpfs 942660 17028 925632 2% /run
tmpfs 942660 0 942660 0% /sys/fs/cgroup
/dev/sda1 508588 25888 482700 6% /mnt
[root@foundation66 ~]# yum install tree
[root@foundation66 ~]# tree /var/lib/iscsi/
/var/lib/iscsi/
|-- ifaces
|-- isns
|-- nodes
| `-- iqn.2018-06.com.example:storage1
| `-- 172.25.254.166,3260,1
| `-- default
|-- send_targets
| `-- 172.25.254.166,3260
| |-- iqn.2018-06.com.example:storage1,172.25.254.200,3260,1,default -> /var/lib/iscsi/nodes/iqn.2018-06.com.example:storage1/172.25.254.200,3260,1
| `-- st_config
|-- slp
可以通过树形结构观察