os_linux_iscsi

Linux Comments

iscsi

Server(target):10.240.36.173

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[root@server(target)]# yum install targetcli

[root@server(target)]# targetcli
---
targetcli shell version 2.1.fb41
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> ls
o- / ......................................................................................................................... [...]
  o- backstores .............................................................................................................. [...]
  | o- block .................................................................................................. [Storage Objects: 1]
  | | o- target.disk1 .................................................................... [/dev/vdb (50.0GiB) write-thru activated]
  | o- fileio ................................................................................................. [Storage Objects: 0]
  | o- pscsi .................................................................................................. [Storage Objects: 0]
  | o- ramdisk ................................................................................................ [Storage Objects: 0]
  o- iscsi ............................................................................................................ [Targets: 1]
  | o- iqn.2019-00.com.haha:iscsitarget1 ................................................................................. [TPGs: 1]
  |   o- tpg1 ............................................................................................... [no-gen-acls, no-auth]
  |     o- acls .......................................................................................................... [ACLs: 1]
  |     | o- iqn.2019-00.com.haha:initiator ....................................................................... [Mapped LUNs: 1]
  |     |   o- mapped_lun0 .......................................................................... [lun0 block/target.disk1 (rw)]
  |     o- luns .......................................................................................................... [LUNs: 1]
  |     | o- lun0 .................................................................................. [block/target.disk1 (/dev/vdb)]
  |     o- portals .................................................................................................... [Portals: 1]
  |       o- 10.240.36.173:3260 ............................................................................................... [OK]
  o- loopback ......................................................................................................... [Targets: 0]
/>saveconfig
/>exit
---

[root@server(target)]# systemctl restart iscsi iscsid
[root@server(target)]# iscsiadm -m node

Client(initiator):10.240.36.186

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[root@client(initiator)]# yum install iscsi-initiator-utils

[root@client(initiator)]# vim /etc/iscsi/initiatorname.iscsi
---
InitiatorName=iqn.2019-00.com.haha:initiator
---

[root@client(initiator)]# systemctl restart iscsi iscsid

[root@host-10-240-36-186 ~]# iscsiadm --mode discoverydb --type sendtargets --portal 10.240.36.173 --discover
---
10.240.36.173:3260,1 iqn.2019-00.com.haha:iscsitarget1
---

[root@client(initiator)]# iscsiadm --mode node --targetname iqn.2019-00.com.haha:iscsitarget1 --portal 10.240.36.173:3260 --login
[root@host-10-240-36-186 ~]# lsblk
---
NAME                  MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                     8:0    0   50G  0 disk 
vda                   252:0    0   80G  0 disk 
├─vda1                252:1    0    1G  0 part /boot
└─vda2                252:2    0   79G  0 part 
  ├─vg_root-lv_root   253:0    0   30G  0 lvm  /
  ├─vg_root-lv_swap   253:1    0    4G  0 lvm  [SWAP]
  ├─vg_root-lv_tmp    253:2    0   20G  0 lvm  /tmp
vdb                   252:16   0   50G  0 disk 
vdc                   252:32   0  1.1T  0 disk 
---


[root@host-10-240-36-186 ~]# cat /proc/scsi/scsi
Attached devices:
Host: scsi26 Channel: 00 Id: 00 Lun: 00
  Vendor: LIO-ORG  Model: target.disk1     Rev: 4.0
  Type:   Direct-Access                    ANSI  SCSI revision: 05

sda above is the exactly disk.

manual

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[root@client(initiator)]# man iscsiadm
---
EXAMPLES
       Discover targets at a given IP address:

            iscsiadm --mode discoverydb --type sendtargets --portal 192.168.1.10 --discover

       Login, must use a node record id found by the discovery:

            iscsiadm --mode node --targetname iqn.2001-05.com.doe:test --portal 192.168.1.1:3260 --login

       Logout:

            iscsiadm --mode node --targetname iqn.2001-05.com.doe:test --portal 192.168.1.1:3260 --logout

       List node records:

            iscsiadm --mode node
---

target

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[root@server(target)]# iscsiadm -m node

initiator

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[root@client(initiator)]# iscsiadm -m node

[root@host-10-240-36-186 ~]# iscsiadm --mode discoverydb --type sendtargets --portal 10.240.36.173 --discover
10.240.36.173:3260,1 iqn.2019-00.com.haha:iscsitarget1

[root@host-10-240-36-186 ~]# iscsiadm --mode node --targetname iqn.2019-00.com.haha:iscsitarget1 --portal 10.240.36.173:3260 --login
Logging in to [iface: default, target: iqn.2019-00.com.haha:iscsitarget1, portal: 10.240.36.173,3260] (multiple)
Login to [iface: default, target: iqn.2019-00.com.haha:iscsitarget1, portal: 10.240.36.173,3260] successful.

[root@host-10-240-36-186 ~]# iscsiadm --mode node --targetname iqn.2019-00.com.haha:iscsitarget1 --portal 10.240.36.173:3260 --logout
Logging out of session [sid: 20, target: iqn.2019-00.com.haha:iscsitarget1, portal: 10.240.36.173,3260]
Logout of [sid: 20, target: iqn.2019-00.com.haha:iscsitarget1, portal: 10.240.36.173,3260] successful.

[root@client(initiator)]# iscsiadm -m discovery -t sendtargets -p 10.240.36.173:3260
[root@client(initiator)]# iscsiadm -m discovery -t st -p 10.240.36.173:3260
[root@client(initiator)]# iscsiadm -m node -T iqn.2019-00.com.haha:iscsitarget1 --login
[root@client(initiator)]# iscsiadm -m node -T iqn.2019-00.com.haha:iscsitarget1 --logout

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