Linux下的ISCIS服务
2024-04-15 09:58:45
ISCIS
介绍
scis SCSI接口是一个通用接口，在SCSI母线上可以连接主机适配器和八个SCSI外设控制器，外设可以包括磁盘、磁带、CD-ROM、可擦写光盘驱动器、打印机、扫描仪和通讯设备等。
iSCS（Internet Small Computer System Interface，发音为/ˈаɪskʌzi/），Internet小型计算机系统接口，又称为IP-SAN，是一种基于因特网及SCSI-3协议下的存储技术，由IETF提出，并于2003年2月11日成为正式的标准。与传统的SCSI技术比较起来，iSCSI技术有以下三个革命性的变化：
把原来只用于本机的SCSI协议透过TCP/IP网络发送，使连接距离可作无限的地域延伸；
连接的服务器数量无限（原来的SCSI-3的上限是15）；
由于是服务器架构，因此也可以实现在线扩容以至动态部署。
共享到windows
添加磁盘
查看磁盘名
[root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 20G 0 disk sr0 11:0 1 9.6G 0 rom nvme0n1 259:0 0 100G 0 disk ├─nvme0n1p1 259:1 0 1G 0 part /boot ├─nvme0n1p2 259:2 0 2G 0 part [SWAP] └─nvme0n1p3 259:3 0 50G 0 part /
2.装包
dnf install targetcli -y
3.运行
进入targetcli交互模式，ls可以看相关选项，cd移动，tab查看选项
[root@localhost ~]# targetcli Warning: Could not load preferences file /root/.targetcli/prefs.bin. targetcli shell version 2.1.53 Copyright 2011-2013 by Datera, Inc and others. For help on commands, type 'help'. /> ls 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/ iscsi/ loopback/ bookmarks cd clearconfig exit get help ls pwd refresh restoreconfig saveconfig sessions set status version /> cd backstores/block /backstores/block> #tab / bookmarks cd create delete exit get help ls pwd refresh set status /backstores/block> create dev= name= readonly= wwn= /backstores/block> create dev=/dev/sda name=LUN1 Created block storage object LUN1 using /dev/sda. /backstores/block> ls o- block ........................................................... [Storage Objects: 1]o- LUN1 ................................... [/dev/sda (20.0GiB) write-thru deactivated]o- alua ............................................................ [ALUA Groups: 1]o- default_tg_pt_gp ................................ [ALUA state: Active/optimized] /backstores/block> cd /iscsi /iscsi> ls o- iscsi ................................................................... [Targets: 0] /iscsi> / @last bookmarks cd create delete exit get help info ls pwd refresh set status version /iscsi> create Created target iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.0ca068783f94. Created TPG 1. Global pref auto_add_default_portal=true Created default portal listening on all IPs (0.0.0.0), port 3260. /iscsi> ls o- iscsi ................................................................... [Targets: 1]o- iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.0ca068783f94 .............. [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] /iscsi> cd iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.0ca068783f94/ /iscsi/iqn.20....0ca068783f94> cd tpg1/ /iscsi/iqn.20...68783f94/tpg1> set attribute authentication=0 demo_mode_write_protect=0 generate_node_acls=1 cache_dynamic_acls=1 Parameter authentication is now '0'. Parameter demo_mode_write_protect is now '0'. Parameter generate_node_acls is now '1'. Parameter cache_dynamic_acls is now '1'. /iscsi/iqn.20...68783f94/tpg1> cd luns /iscsi/iqn.20...f94/tpg1/luns> / @last bookmarks cd create delete exit get help ls pwd refresh set status /iscsi/iqn.20...f94/tpg1/luns> create /backstores/block/LUN1 anaconda-ks.cfg add_mapped_luns= lun= storage_object= /iscsi/iqn.20...f94/tpg1/luns> create /backstores/block/LUN1 anaconda-ks.cfg add_mapped_luns= lun= storage_object= /iscsi/iqn.20...f94/tpg1/luns> create /backstores/block/LUN1 anaconda-ks.cfg add_mapped_luns= lun= storage_object= /iscsi/iqn.20...f94/tpg1/luns> create storage_object=/backstores/block/LUN1 Created LUN 0. /iscsi/iqn.20...f94/tpg1/luns> ls o- luns ....................................................................... [LUNs: 1]o- lun0 .................................... [block/LUN1 (/dev/sda) (default_tg_pt_gp)] /iscsi/iqn.20...f94/tpg1/luns> cd .. /iscsi/iqn.20...68783f94/tpg1> ls o- tpg1 ............................................................. [gen-acls, no-auth]o- acls ..................................................................... [ACLs: 0]o- luns ..................................................................... [LUNs: 1]| o- lun0 .................................. [block/LUN1 (/dev/sda) (default_tg_pt_gp)]o- portals ............................................................... [Portals: 1]o- 0.0.0.0:3260 ................................................................ [OK] /iscsi/iqn.20...68783f94/tpg1> cd / /> ls o- / .............................................................................. [...]o- backstores ................................................................... [...]| o- block ....................................................... [Storage Objects: 1]| | o- LUN1 ................................. [/dev/sda (20.0GiB) 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.2003-01.org.linux-iscsi.localhost.x8664:sn.0ca068783f94 ............ [TPGs: 1]| o- tpg1 ....................................................... [gen-acls, no-auth]| o- acls ............................................................... [ACLs: 0]| o- luns ............................................................... [LUNs: 1]| | o- lun0 ............................ [block/LUN1 (/dev/sda) (default_tg_pt_gp)]| o- portals ......................................................... [Portals: 1]| o- 0.0.0.0:3260 .......................................................... [OK]o- loopback .............................................................. [Targets: 0] /> exit Global pref auto_save_on_exit=true Configuration saved to /etc/target/saveconfig.json #保存路径 [root@localhost ~]#
如上创建成功
[root@localhost ~]# systemctl restart target #重启服务 [root@localhost ~]# systemctl stop firewalld [root@localhost ~]# setenforce 0 [root@localhost ~]# netstat -lntup | grep 3260 tcp 0 0 0.0.0.0:3260 0.0.0.0:* LISTEN - #查看端口是否监听
4.PC端
输入IP
点击确定打开计算机管理中的磁盘管理，进行分区
右键新建简单卷
完成创建
Linux 进行连接
首先为了方便操作去掉windows上的链接，当然完全可以共享。（iSCSI发起程序）
重新打开一个虚拟机
装包
[root@TEXT ~]# dnf install iscsi-initiator-utils -y
2.查询并连接
[root@TEXT ~]# systemctl start iscsi #重启服务
[root@TEXT ~]# iscsiadm -m discovery -t st -p 192.168.163.111 #查找
192.168.163.111:3260,1 iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.0ca068783f94
[root@TEXT ~]# iscsiadm -m discovery -t st -p 192.168.163.111 -l #链接
192.168.163.111:3260,1 iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.0ca068783f94
Logging in to [iface: default, target: iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.0c068783f94, portal: 192.168.163.111,3260]
Login to [iface: default, target: iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.0ca06873f94, portal: 192.168.163.111,3260] successful.
[root@TEXT ~]# fdisk -l
Disk /dev/sdc: 20 GiB, 21474836480 bytes, 41943040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 33550336 bytes
Disklabel type: gpt
Disk identifier: AA217BAD-8584-46F2-83D3-04111A462CE4
Device Start End Sectors Size Type
/dev/sdc1 34 32767 32734 16M Microsoft reserved
/dev/sdc2 32768 41938943 41906176 20G Microsoft basic data #fdisk -l 查看磁盘，可以看出sdc是我们要找的，而且还有win上面创建的分区
[root@TEXT ~]# fdisk /dev/sdc
Welcome to fdisk (util-linux 2.32.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): d
Partition 2 has been deleted.
Command (m for help): d
Selected partition 1
Partition 1 has been deleted.
Command (m for help): n
Partition number (1-128, default 1): 1
First sector (34-41943006, default 65528):
Last sector, +sectors or +size{K,M,G,T,P} (65528-41943006, default 41943006):
Created a new partition 1 of type 'Linux filesystem' and of size 20 GiB.
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks. #删除之前创建的分区，重新分区
[root@TEXT ~]# ll /dev/sdc*
brw-rw----. 1 root disk 8, 32 Nov 9 15:04 /dev/sdc
brw-rw----. 1 root disk 8, 33 Nov 9 15:04 /dev/sdc1
[root@TEXT ~]# mkdir /hehe
[root@TEXT ~]# mkfs.xfs /dev/sdc1 #格式化
meta-data=/dev/sdc1 isize=512 agcount=4, agsize=1308671 blks= sectsz=512 attr=2, projid32bit=1= crc=1 finobt=1, sparse=1, rmapbt=0= reflink=1
data = bsize=4096 blocks=5234684, imaxpct=25= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1
log =internal log bsize=4096 blocks=2560, version=2= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@TEXT ~]# mount /dev/sdc1 /hehe #挂载
[root@TEXT ~]# blkid #查看uid
/dev/nvme0n1: PTUUID="381ee8e8" PTTYPE="dos"
/dev/nvme0n1p1: UUID="8728902a-6abf-424d-926f-3c1f33c034d8" BLOCK_SIZE="512" TYPE="xfs" ARTUUID="381ee8e8-01"
/dev/nvme0n1p2: UUID="36c47a66-c2ec-4873-a410-1acd97d40c26" BLOCK_SIZE="512" TYPE="xfs" ARTUUID="381ee8e8-02"
/dev/nvme0n1p3: UUID="1c005d0d-cf55-46b4-b66c-9cbe5cc73a33" TYPE="swap" PARTUUID="381ee88-03"
/dev/sda1: UUID="QcDJ8k-7kor-npFG-c5qy-b1RD-wOmO-OVXhNs" TYPE="LVM2_member" PARTUUID="0a3f123-01"
/dev/sda2: UUID="WutBNe-X7xk-0HrH-iYek-X9pi-22rR-JEr5h5" TYPE="LVM2_member" PARTUUID="0a3f123-02"
/dev/sr0: BLOCK_SIZE="2048" UUID="2021-07-06-23-45-46-00" LABEL="CentOS-Stream-8-x86_64-vd" TYPE="iso9660" PTUUID="7ec418e2" PTTYPE="dos"
/dev/mapper/webvg-weblv: UUID="546e2beb-6efc-4afd-af07-206321d8fe37" BLOCK_SIZE="512" TYE="xfs"
/dev/sdc1: UUID="a3160754-dffa-47b1-bf32-14749a2880e5" BLOCK_SIZE="512" TYPE="xfs" PARTUID="f8560dd6-c317-e446-883a-cc366a90fceb"
[root@TEXT ~]# vim /etc/fstab #编辑实现开机自动挂载
[root@TEXT ~]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Sat Jul 17 06:38:56 2021
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
UUID=36c47a66-c2ec-4873-a410-1acd97d40c26 / xfs defaults 0 0
UUID=8728902a-6abf-424d-926f-3c1f33c034d8 /boot xfs defaults 0 0
UUID=1c005d0d-cf55-46b4-b66c-9cbe5cc73a33 none swap defaults 0 0
UUID=546e2beb-6efc-4afd-af07-206321d8fe37 /web xfs defaults 0 0
UUID=a3160754-dffa-47b1-bf32-14749a2880e5 /hehe xfs defaults,_netdev 0 0 #注意defaults，_netdev 如果不加后缀有可能因为开机一直读该文件，但由于没有开机导致服务未启动，磁盘找不到而形成的闭环。
[root@TEXT ~]# mount -a #读取挂载信息
[root@TEXT ~]# rebook #重启
[root@TEXT ~]# df-h #查看挂载情况
特点
只要IP可达，iSCSI服务器就可以提供服务，前提是IP得通
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