[CentOS7] iSCSI

1. 1GB 새로운 파티션 생성

server11# fdisk /dev/vdb

n => p => Enter => Enter => +1G => w

n => p => Enter => Enter => +1G => t => 8e => w   // LVM

// LVM 사용 시  pvcreate /dev/vdb1, vgcreate iSCSI_vg /dev/vdb1, lvcreate -n disk1_lv -L 100m iSCSI_vg

2. targetcli 패키지 설치

server11# yum install targetcli

3. target.service 활성화 및 시작

server11# systemctl enable target.service

ln -s '/usr/lib/systemd/system/target.service' '/etc/systemd/system/multi-user.target.wants/target.service'

server11# systemctl start target.service

server11# targetcli

### 블록 생성

/> /backstores/block create disk1 /dev/vdb1

Created block storage object disk1 using /dev/vdb1.

### TARGET 생성
/> /iscsi create iqn.2015-03.com.example:server11

Created target iqn.2015-03.com.example:server11.
Created TPG 1.

### ACL 생성

/> /iscsi/iqn.2015-03.com.example:server11/tpg1/acls create iqn.2015-03.com.example:desktop11

Created Node ACL for iqn.2015-03.com.example:desktop11

### LUN 생성

/> /iscsi/iqn.2015-03.com.example:server11/tpg1/luns create /backstores/block/disk1

Created LUN 0.
Created LUN 0->0 mapping in node ACL iqn.2015-03.com.example:desktop11

### portal 생성(타겟 서버의 IP이며 포탈처럼 열어주라는 의미)

/> /iscsi/iqn.2015-03.com.example:server11/tpg1/portals create 172.25.11.11 3260

Using default IP port 3260
Created network portal 172.25.11.11:3260.

/> saveconfig

Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json

/> exit

server11# firewall-cmd --permanent --add-port=3260/tcp

server11# firewall-cmd --add-port=3260/tcp

server11# firewall-cmd --reload

desktop11# yum install iscsi-initiator-utils

desktop11# vi /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2015-03.com.example:desktop11

desktop11# systemctl restart iscsi

### 대상 검색

desktop11# iscsiadm -m discovery -t st -p server11.example.com

172.25.11.11:3260,1 iqn.2015-03.com.example:server11

### 로그인

desktop11# iscsiadm -m node -T iqn.2015-03.com.example:server11 -l

Logging in to [iface: default, target: iqn.2015-03.com.example:server11, portal: 172.25.11.11,3260] (multiple)
Login to [iface: default, target: iqn.2015-03.com.example:server11, portal: 172.25.11.11,3260] successful.

### iSCSI 디스크의 장치 노드 확인

desktop11# iscsiadm -m session -P3 | grep Attached

Attached SCSI devices:
Attached scsi disk sda        State: running 

### 파일시스템 포맷 및 UUID 확인

[root@desktop11 ~]# mkfs -t xfs /dev/sda

[root@desktop11 ~]# blkid /dev/sda

/dev/sda: UUID="d5199a71-863a-4814-9b9c-7856a8c00776" TYPE="xfs" 

### fstab 등록

desktop11# vi /etc/fstab

UUID="d5199a71-863a-4814-9b9c-7856a8c00776"     /iscsidisk        xfs   defaults        0 2

### mount

desktop11# mkdir /iscsidisk

desktop11# mount /iscsidisk