[LINUX][RHEL7] iSCSI 사용방법

[RHEL7] iSCSI 사용방법

- iSCSI 를 이용한 원격 블록 스토리지 사용방법

 

 

(1) 서버설정 1. targetcli 설치 serverX# yum -y install targetcli 2. target으로 사용할 LV생성, 디스크파티션생성 # vgcreate target_vg /dev/sdc2 # lvcreate -n target_lv -l +100%FREE target_vg # lvs LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert target_lv target_vg -wi-a----- 1020.00m - /dev/sde (디스크파티션 생성) 3. 보조스토리지 저장소(파일) 생성 # targetcli /> cd /backstores /backstores> fileio/ create file1 /root/disk1_file1 100M 4. 보조스토리지 저장소(block) 생성 # targetcli /> cd /backstores /backstores> block/ create block1 /dev/target_vg/target_lv Created block storage object block1 using /dev/target_vg/target_lv. /backstores> block/ create block2 /dev/sde Created block storage object block2 using /dev/sde. /backstores> ls o- backstores ................................................................................................................ [...] o- block .................................................................................................... [Storage Objects: 2] | o- block1 ........................................................ [/dev/target_vg/target_lv (1020.0MiB) write-thru deactivated] | o- block2 ........................................................................... [/dev/sde (1.0GiB) write-thru deactivated] o- fileio ................................................................................................... [Storage Objects: 1] | o- file1 ................................................................... [/root/disk1_file1 (100.0MiB) write-back activated] o- pscsi .................................................................................................... [Storage Objects: 0] o- ramdisk .................................................................................................. [Storage Objects: 0] 5. 대상의 IQN 생성 /> cd /iscsi /iscsi> create iqn.2015-04.com.example:remotedisk1 Created target iqn.2015-04.com.example:remotedisk1. Created TPG 1. 6. TPG1에 대한 ACL생성 /iscsi> cd iqn.2015-04.com.example:remotedisk1/ /iscsi/iqn.20...e:remotedisk1> cd tpg1/ /iscsi/iqn.20...otedisk1/tpg1> acls/ create iqn.2015-04.com.example:desktopX Created Node ACL for iqn.2015-04.com.example:desktopx Created mapped LUN 0.   7. file1, block1,2 에대한 LUN생성 /iscsi/iqn.20...otedisk1/tpg1> luns/ create /backstores/fileio/file1 Created LUN 0. /iscsi/iqn.20...otedisk1/tpg1> luns/ create /backstores/block/block1 Created LUN 1. Created LUN 1->1 mapping in node ACL iqn.2015-04.com.example:desktopx /iscsi/iqn.20...otedisk1/tpg1> luns/ create /backstores/block/block2 Created LUN 2. Created LUN 2->2 mapping in node ACL iqn.2015-04.com.example:desktopx 8. Portal 생성 (서버의 if주소로 생성) /iscsi/iqn.20...otedisk1/tpg1> portals/ create 165.213.246.94 Using default IP port 3260 Created network portal 165.213.246.94:3260. 9. 전체 구성확인 /iscsi/iqn.20...otedisk1/tpg1> cd / /> ls o- / ......................................................................................................................... [...] o- backstores .............................................................................................................. [...] | o- block .................................................................................................. [Storage Objects: 2] | | o- block1 ........................................................ [/dev/target_vg/target_lv (1020.0MiB) write-thru activated] | | o- block2 ........................................................................... [/dev/sde (1.0GiB) write-thru activated] | o- fileio ................................................................................................. [Storage Objects: 1] | | o- file1 ................................................................. [/root/disk1_file1 (100.0MiB) write-back activated] | o- pscsi .................................................................................................. [Storage Objects: 0] | o- ramdisk ................................................................................................ [Storage Objects: 0] o- iscsi ............................................................................................................ [Targets: 1] | o- iqn.2015-04.com.example:remotedisk1 ............................................................................... [TPGs: 1] | o- tpg1 ............................................................................................... [no-gen-acls, no-auth] | o- acls .......................................................................................................... [ACLs: 1] | | o- iqn.2015-04.com.example:desktopx ..................................................................... [Mapped LUNs: 3] | | o- mapped_lun0 ................................................................................ [lun0 fileio/file1 (rw)] | | o- mapped_lun1 ................................................................................ [lun1 block/block1 (rw)] | | o- mapped_lun2 ................................................................................ [lun2 block/block2 (rw)] | o- luns .......................................................................................................... [LUNs: 3] | | o- lun0 ............................................................................... [fileio/file1 (/root/disk1_file1)] | | o- lun1 ........................................................................ [block/block1 (/dev/target_vg/target_lv)] | | o- lun2 ........................................................................................ [block/block2 (/dev/sde)] | o- portals .................................................................................................... [Portals: 1] | o- 165.213.246.94:3260 .............................................................................................. [OK] o- loopback ......................................................................................................... [Targets: 0] /> exit Global pref auto_save_on_exit=true Last 10 configs saved in /etc/target/backup. Configuration saved to /etc/target/saveconfig.json 10. 방화벽 등록 및 재시작 # firewall-cmd --permanent --add-port=3260/tcp # firewall-cmd --reload # systemctl restart target.service (2) 클라이언트 설정 1. iscsi-initiator-utils 설치 # yum -y install iscsi-initiator-utils 2. 클라이언트의 이니시에이터 네임설정 #vi /etc/iscsi/initiatorname.iscsi InitiatorName=iqn.2015-04.com.example:desktopX   3. iscsi 서비스 활성화 및 시작 # systemctl enable iscsi # systemctl start iscsi   4. 포털검색 # iscsiadm -m iscsiadm -m discovery -t sendtargets -p 165.213.246.94 165.213.246.94:3260,1 iqn.2015-04.com.example:remotedisk1   5. 포털 로그인 # iscsiadm -m iscsiadm -m node -T "iqn.2015-04.com.example:remotedisk1" -p 165.213.246.94:3260 -l Logging in to [iface: default, target: iqn.2015-04.com.example:remotedisk1, portal: 165.213.246.94,3260] (multiple) Login to [iface: default, target: iqn.2015-04.com.example:remotedisk1, portal: 165.213.246.94,3260] successful.   6. 디바이스 확인 # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sda 8:0 0 40G 0 disk ├─sda1 8:1 0 500M 0 part /boot sdd 8:48 0 100M 0 disk # iscsiadm -m session -P 3 ... Attached scsi disk sdd State: running   7. 영구노드 레코드 확인 # cd /var/lib/iscsi/nodes/ #ls -Rl .: drw-------. 3 root root 34 4월 29 16:43 iqn.2015-04.com.example:remotedisk1 ./iqn.2015-04.com.example:remotedisk1: drw-------. 2 root root 20 4월 29 16:43 165.213.246.94,3260,1 ./iqn.2015-04.com.example:remotedisk1/165.213.246.94,3260,1: -rw-------. 1 root root 2049 4월 29 16:43 default 8. 매개변수 기본값 확인 # less iqn.2015-04.com.example\:remotedisk1/165.213.246.94\,3260\,1/default # BEGIN RECORD 6.2.0.873-21 node.name = iqn.2015-04.com.example:remotedisk1 node.tpgt = 1 node.startup = automatic node.leading_login = No ..........................   9. 연결끊기 # iscsiadm -m node -T "iqn.2015-04.com.example:remotedisk1" -p 165.213.246.94:3260 -u # iscsiadm -m node -T "iqn.2015-04.com.example:remotedisk1" -p 165.213.246.94:3260 -o delete (영구)   10. 노드 레코드 확인 # cd /var/lib/iscsi/nodes/ #ls -Rl 11. 디바이스 확인 # lsblk