구축 방법

패키지 설치

[root@server ~]# yum -y install targetcli

데몬 설정

[root@server ~]# systemctl restart target
[root@server ~]# systemctl enable target

타겟 설정

[root@server ~]# targetcli

Warning: Could not load preferences file /root/.targetcli/prefs.bin.
targetcli shell version 2.1.fb49
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

Backstores 구조

/> 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]

Block 생성

/> backstores/block create name=test_block dev=/dev/sdb
Created block storage object test_block using /dev/sdb.
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block .............. [/dev/sdb (10.0GiB) write-thru deactivated]
| | 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: 0]
o- loopback ................................................... [Targets: 0]

Fileio 생성

/> backstores/fileio create name=test_file file_or_dev=/root/fileA size=100M write_back=false
Created fileio test_file with size 104857600
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block .............. [/dev/sdb (10.0GiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ........... [/root/fileA (100.0MiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 0]
| o- ramdisk .......................................... [Storage Objects: 0]
o- iscsi ...................................................... [Targets: 0]
o- loopback ................................................... [Targets: 0]

pscsi 생성

/> backstores/pscsi create name=test_pscsi dev=/dev/sdc
Note: block backstore recommended for SCSI block devices
Created pscsi storage object test_pscsi using /dev/sdc
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block .............. [/dev/sdb (10.0GiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ........... [/root/fileA (100.0MiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 1]
| | o- test_pscsi ................................... [/dev/sdc deactivated]
| | o- alua ............................................. [ALUA Groups: 0]
| o- ramdisk .......................................... [Storage Objects: 0]
o- iscsi ...................................................... [Targets: 0]
o- loopback ................................................... [Targets: 0]

ramdisk 생성

/> backstores/ramdisk create name=test_ramdisk size=100M
Created ramdisk test_ramdisk with size 100M.
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block .............. [/dev/sdb (10.0GiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ........... [/root/fileA (100.0MiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 1]
| | o- test_pscsi ................................... [/dev/sdc deactivated]
| | o- alua ............................................. [ALUA Groups: 0]
| o- ramdisk .......................................... [Storage Objects: 1]
| o- test_ramdisk ............................... [(100.0MiB) deactivated]
| o- alua ............................................. [ALUA Groups: 1]
| o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
o- iscsi ...................................................... [Targets: 0]
o- loopback ................................................... [Targets: 0]

ISCSI 연결 설정

/> /iscsi create wwn=iqn.2020-04.kr.co.redhat:server
Created target iqn.2020-04.kr.co.redhat:server.
Created TPG 1.
Global pref auto_add_default_portal=true
Created default portal listening on all IPs (0.0.0.0), port 3260.
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block .............. [/dev/sdb (10.0GiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ........... [/root/fileA (100.0MiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 1]
| | o- test_pscsi ................................... [/dev/sdc deactivated]
| | o- alua ............................................. [ALUA Groups: 0]
| o- ramdisk .......................................... [Storage Objects: 1]
| o- test_ramdisk ............................... [(100.0MiB) deactivated]
| o- alua ............................................. [ALUA Groups: 1]
| o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
o- iscsi ...................................................... [Targets: 1]
| o- iqn.2020-04.kr.co.redhat:server ............................. [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]
o- loopback ................................................... [Targets: 0]

ISCSI ACL 설정

/> /iscsi/iqn.2020-04.kr.co.redhat:server/tpg1/acls create wwn=iqn.2020-04.kr.co.redhat:client
Created Node ACL for iqn.2020-04.kr.co.redhat:client
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block .............. [/dev/sdb (10.0GiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ........... [/root/fileA (100.0MiB) write-thru deactivated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 1]
| | o- test_pscsi ................................... [/dev/sdc deactivated]
| | o- alua ............................................. [ALUA Groups: 0]
| o- ramdisk .......................................... [Storage Objects: 1]
| o- test_ramdisk ............................... [(100.0MiB) deactivated]
| o- alua ............................................. [ALUA Groups: 1]
| o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
o- iscsi ...................................................... [Targets: 1]
| o- iqn.2020-04.kr.co.redhat:server ............................. [TPGs: 1]
| o- tpg1 ......................................... [no-gen-acls, no-auth]
| o- acls .................................................... [ACLs: 1]
| | o- iqn.2020-04.kr.co.redhat:client ................ [Mapped LUNs: 0]
| o- luns .................................................... [LUNs: 0]
| o- portals .............................................. [Portals: 1]
| o- 0.0.0.0:3260 ............................................... [OK]
o- loopback ................................................... [Targets: 0]

LUN 설정

/> /iscsi/iqn.2020-04.kr.co.redhat:server/tpg1/luns create storage_object=/backstores/block/test_block lun=lun0
Created LUN 0.
Created LUN 0->0 mapping in node ACL iqn.2020-04.kr.co.redhat:client
/> /iscsi/iqn.2020-04.kr.co.redhat:server/tpg1/luns create storage_object=/backstores/fileio/test_file lun=lun1 add_mapped_luns=false
Created LUN 1.
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block ................ [/dev/sdb (10.0GiB) write-thru activated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ............. [/root/fileA (100.0MiB) write-thru activated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 1]
| | o- test_pscsi ................................... [/dev/sdc deactivated]
| | o- alua ............................................. [ALUA Groups: 0]
| o- ramdisk .......................................... [Storage Objects: 1]
| o- test_ramdisk ............................... [(100.0MiB) deactivated]
| o- alua ............................................. [ALUA Groups: 1]
| o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
o- iscsi ...................................................... [Targets: 1]
| o- iqn.2020-04.kr.co.redhat:server ............................. [TPGs: 1]
| o- tpg1 ......................................... [no-gen-acls, no-auth]
| o- acls .................................................... [ACLs: 1]
| | o- iqn.2020-04.kr.co.redhat:client ................ [Mapped LUNs: 1]
| | o- mapped_lun0 ...................... [lun0 block/test_block (rw)]
| o- luns .................................................... [LUNs: 2]
| | o- lun0 ........... [block/test_block (/dev/sdb) (default_tg_pt_gp)]
| | o- lun1 ........ [fileio/test_file (/root/fileA) (default_tg_pt_gp)]
| o- portals .............................................. [Portals: 1]
| o- 0.0.0.0:3260 ............................................... [OK]
o- loopback ................................................... [Targets: 0]

LUN 설정 2

/> /iscsi/iqn.2020-04.kr.co.redhat:server/tpg1/acls/iqn.2020-04.kr.co.redhat:client create mapped_lun=1 tpg_lun_or_backstore=/backstores/fileio/test_file write_protect=1
Created Mapped LUN 1.
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block ................ [/dev/sdb (10.0GiB) write-thru activated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ............. [/root/fileA (100.0MiB) write-thru activated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 1]
| | o- test_pscsi ................................... [/dev/sdc deactivated]
| | o- alua ............................................. [ALUA Groups: 0]
| o- ramdisk .......................................... [Storage Objects: 1]
| o- test_ramdisk ............................... [(100.0MiB) deactivated]
| o- alua ............................................. [ALUA Groups: 1]
| o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
o- iscsi ...................................................... [Targets: 1]
| o- iqn.2020-04.kr.co.redhat:server ............................. [TPGs: 1]
| o- tpg1 ......................................... [no-gen-acls, no-auth]
| o- acls .................................................... [ACLs: 1]
| | o- iqn.2020-04.kr.co.redhat:client ................ [Mapped LUNs: 2]
| | o- mapped_lun0 ...................... [lun0 block/test_block (rw)]
| | o- mapped_lun1 ...................... [lun1 fileio/test_file (ro)]
| o- luns .................................................... [LUNs: 2]
| | o- lun0 ........... [block/test_block (/dev/sdb) (default_tg_pt_gp)]
| | o- lun1 ........ [fileio/test_file (/root/fileA) (default_tg_pt_gp)]
| o- portals .............................................. [Portals: 1]
| o- 0.0.0.0:3260 ............................................... [OK]
o- loopback ................................................... [Targets: 0]

Portal 설정

/> /iscsi/iqn.2020-04.kr.co.redhat:server/tpg1/portals/ delete ip_address=0.0.0.0 ip_port=3260
Deleted network portal 0.0.0.0:3260
/> /iscsi/iqn.2020-04.kr.co.redhat:server/tpg1/portals create 192.168.10.10
Using default IP port 3260
Created network portal 192.168.10.10:3260.
/> /iscsi/iqn.2020-04.kr.co.redhat:server/tpg1/portals create 192.168.10.20
Using default IP port 3260
Created network portal 192.168.10.20:3260.
/> ls
o- / ................................................................... [...]
o- backstores ........................................................ [...]
| o- block ............................................ [Storage Objects: 1]
| | o- test_block ................ [/dev/sdb (10.0GiB) write-thru activated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- fileio ........................................... [Storage Objects: 1]
| | o- test_file ............. [/root/fileA (100.0MiB) write-thru activated]
| | o- alua ............................................. [ALUA Groups: 1]
| | o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
| o- pscsi ............................................ [Storage Objects: 1]
| | o- test_pscsi ................................... [/dev/sdc deactivated]
| | o- alua ............................................. [ALUA Groups: 0]
| o- ramdisk .......................................... [Storage Objects: 1]
| o- test_ramdisk ............................... [(100.0MiB) deactivated]
| o- alua ............................................. [ALUA Groups: 1]
| o- default_tg_pt_gp ................. [ALUA state: Active/optimized]
o- iscsi ...................................................... [Targets: 1]
| o- iqn.2020-04.kr.co.redhat:server ............................. [TPGs: 1]
| o- tpg1 ......................................... [no-gen-acls, no-auth]
| o- acls .................................................... [ACLs: 1]
| | o- iqn.2020-04.kr.co.redhat:client ................ [Mapped LUNs: 2]
| | o- mapped_lun0 ...................... [lun0 block/test_block (rw)]
| | o- mapped_lun1 ...................... [lun1 fileio/test_file (ro)]
| o- luns .................................................... [LUNs: 2]
| | o- lun0 ........... [block/test_block (/dev/sdb) (default_tg_pt_gp)]
| | o- lun1 ........ [fileio/test_file (/root/fileA) (default_tg_pt_gp)]
| o- portals .............................................. [Portals: 2]
| o- 192.168.10.10:3260 ......................................... [OK]
| o- 192.168.10.20:3260 ......................................... [OK]
o- loopback ................................................... [Targets: 0]

방화벽 설정

[root@server ~]# firewall-cmd --permanent --zone=public --add-port=3260/tcp
success
[root@server ~]# firewall-cmd --reload
success

ISCSI 클라이언트 설정

[root@client samba]# yum -y install iscsi-initiator-utils
[root@client ~]# vi /etc/iscsi/initiatorname.iscsi 
InitiatorName=iqn.2020-04.kr.co.redhat:client
[root@client ~]# systemctl restart iscsi
[root@client ~]# systemctl enable iscsi

로그인

[root@client ~]# iscsiadm -m node -T iqn.2020-04.kr.co.redhat:server -l
Logging in to [iface: default, target: iqn.2020-04.kr.co.redhat:server, portal: 192.168.10.10,3260] (multiple)
Logging in to [iface: default, target: iqn.2020-04.kr.co.redhat:server, portal: 192.168.10.20,3260] (multiple)
Login to [iface: default, target: iqn.2020-04.kr.co.redhat:server, portal: 192.168.10.10,3260] successful.

세션 확인

[root@client ~]# iscsiadm -m session -P 3
iSCSI Transport Class version 2.0-870
version 6.2.0.874-10
Target: iqn.2020-04.kr.co.redhat:server (non-flash)
Current Portal: 192.168.10.10:3260,1
Persistent Portal: 192.168.10.10:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.2020-04.kr.co.redhat:client
Iface IPaddress: 192.168.10.20
Iface HWaddress: <empty>
Iface Netdev: <empty>
SID: 1
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
*********
Timeouts:
*********
Recovery Timeout: 120
Target Reset Timeout: 30
LUN Reset Timeout: 30
Abort Timeout: 15
*****
CHAP:
*****
username: <empty>
password: ********
username_in: <empty>
password_in: ********
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 262144
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 3 State: running
scsi3 Channel 00 Id 0 Lun: 0
Attached scsi disk sdd State: running
scsi3 Channel 00 Id 0 Lun: 1
Attached scsi disk sde State: running

로그아웃

[root@client ~]# iscsiadm -m node -T iqn.2020-04.kr.co.redhat:server -u
Logging out of session [sid: 1, target: iqn.2020-04.kr.co.redhat:server, portal: 192.168.10.10,3260]
Logout of [sid: 1, target: iqn.2020-04.kr.co.redhat:server, portal: 192.168.10.10,3260] successful.

파티션 생성 후 사용

[root@client ~]# lsblk 
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   30G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   29G  0 part 
  ├─centos-root 253:0    0   27G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   10G  0 disk 
sdc               8:32   0   10G  0 disk 
sdd               8:48   0   10G  0 disk 
└─sdd1          8:49     0   10G  0 part  << iscsi 서버하드
sde               8:64   0  100M  1 disk 
sr0              11:0    1  4.3G  0 rom  /run/media/root/CentOS 7 x86_64
[root@client ~]# mkdir /mnt/iscsi
[root@client ~]# mount /dev/sdd1 /mnt/iscsi/
[root@client ~]# df -hT
Filesystem               Type      Size  Used Avail Use% Mounted on
devtmpfs                 devtmpfs  894M     0  894M   0% /dev
tmpfs                    tmpfs     910M     0  910M   0% /dev/shm
tmpfs                    tmpfs     910M   11M  900M   2% /run
tmpfs                    tmpfs     910M     0  910M   0% /sys/fs/cgroup
/dev/mapper/centos-root  xfs        27G  4.4G   23G  17% /
/dev/sda1                xfs      1014M  232M  783M  23% /boot
192.168.10.10:/share/nfs nfs4       27G  4.3G   23G  16% /mnt/nfsclient
tmpfs                    tmpfs     182M  4.0K  182M   1% /run/user/42
tmpfs                    tmpfs     182M   24K  182M   1% /run/user/0
/dev/sr0                 iso9660   4.3G  4.3G     0 100% /run/media/root/CentOS 7 x86_64
//192.168.10.10/share    cifs       27G  4.3G   23G  16% /mnt/samba
/dev/sdd1                ext4      9.8G   37M  9.2G   1% /mnt/iscsi << 정상 mount 확인