iSCSI Target 서버 구성

1. 별도의 Storage 장비가 없을 경우 Linux 에서 간단히 iSCSI 형태의 Shared Volume을 제공 가능

 

[root@TEST01 ~]# [root@TEST01 ~]# yum list | grep scsi iscsi-initiator-utils.x86_64 6.2.0.872-13.el5 installed iscsi-initiator-utils.x86_64 6.2.0.872-16.el5 base lsscsi.x86_64 0.17-3.el5 base scsi-target-utils.x86_64 1.0.14-2.el5 base [root@TEST01 ~]# [root@TEST01 ~]# yum info scsi-target-utils.x86_64 Loaded plugins: fastestmirror, priorities, security Loading mirror speeds from cached hostfile * base: data.nicehosting.co.kr * extras: data.nicehosting.co.kr * rpmforge: ftp.riken.jp * updates: data.nicehosting.co.kr Available Packages Name : scsi-target-utils Arch : x86_64 Version : 1.0.14 Release : 2.el5 Size : 172 k Repo : base Summary : The SCSI target daemon and utility programs URL : http://stgt.sourceforge.net/ License : GPLv2 Description: The SCSI target package contains the daemon and tools to setup a SCSI targets. : Currently, software iSCSI targets are supported. [root@TEST01 ~]# [root@TEST01 ~]# [root@TEST01 ~]# yum -y install scsi-target-utils.x86_64 Loaded plugins: fastestmirror, priorities, security Loading mirror speeds from cached hostfile * base: centos.tt.co.kr * extras: centos.tt.co.kr * rpmforge: ftp.riken.jp . . . 생략 Running Transaction Installing : perl-Config-General 1/5 Installing : openib 2/5 Installing : libibverbs 3/5 Installing : librdmacm 4/5 Installing : scsi-target-utils 5/5 Installed: scsi-target-utils.x86_64 0:1.0.14-2.el5 Dependency Installed: libibverbs.x86_64 0:1.1.6-3.el5 librdmacm.x86_64 0:1.0.15-2.el5 openib.noarch 0:1.5.4.1-4.el5 perl-Config-General.noarch 0:2.44-1.el5.rf Complete! [root@TEST01 ~]# [root@TEST01 ~]# [root@TEST01 /]# [root@TEST01 /]# service tgtd start Starting SCSI target daemon: Starting target framework daemon [root@TEST01 /]# [root@TEST01 /]# tgtadm --lld iscsi --op new --mode target --tid 1 -T iqn.2013-09.192.168.137.10:storage.iscsi1 [root@TEST01 /]# [root@TEST01 /]# tgtadm --lld iscsi --op show --mode target Target 1: iqn.2013-09.192.168.137.10:storage.iscsi1 System information: Driver: iscsi State: ready I_T nexus information: LUN information: LUN: 0 Type: controller SCSI ID: IET 00010000 SCSI SN: beaf10 Size: 0 MB, Block size: 1 Online: Yes Removable media: No Readonly: No Backing store type: null Backing store path: None Backing store flags: Account information: ACL information: [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b /dev/sdb (Target LUN 할당 작업) [root@TEST01 /]# [root@TEST01 /]# tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL (할당된 TID 및 LUN에 대항 Binding) [root@TEST01 /]# [root@TEST01 /]# tgtadm --lld iscsi --op show --mode target Target 1: iqn.2013-09.192.168.137.10:storage.iscsi1 System information: Driver: iscsi State: ready I_T nexus information: LUN information: LUN: 0 Type: controller SCSI ID: IET 00010000 SCSI SN: beaf10 Size: 0 MB, Block size: 1 Online: Yes Removable media: No Readonly: No Backing store type: null Backing store path: None Backing store flags: LUN: 1 Type: disk SCSI ID: IET 00010001 SCSI SN: beaf11 Size: 1074 MB, Block size: 512 Online: Yes Removable media: No Readonly: No Backing store type: rdwr Backing store path: /dev/sdb Backing store flags: Account information: ACL information: ALL [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# tgtadm --lld iscsi --op show --mode target --tid 1 MaxRecvDataSegmentLength=8192 MaxXmitDataSegmentLength=8192 HeaderDigest=None DataDigest=None InitialR2T=Yes MaxOutstandingR2T=1 ImmediateData=Yes FirstBurstLength=65536 MaxBurstLength=262144 DataPDUInOrder=Yes DataSequenceInOrder=Yes ErrorRecoveryLevel=0 IFMarker=No OFMarker=No DefaultTime2Wait=2 DefaultTime2Retain=20 OFMarkInt=Reject IFMarkInt=Reject MaxConnections=1 RDMAExtensions=Yes TargetRecvDataSegmentLength=262144 InitiatorRecvDataSegmentLength=262144 MaxOutstandingUnexpectedPDUs=0 [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# ps -ef | grep tgtd root 3183 1 0 11:22 ? 00:00:00 tgtd root 3184 3183 0 11:22 ? 00:00:00 tgtd root 3285 2371 0 12:02 pts/0 00:00:00 grep tgtd [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# lsof -i | grep 3183 tgtd 3183 root 5u IPv4 12132 0t0 TCP *:iscsi-target (LISTEN) [root@TEST01 /]# [root@TEST01 /]# netstat -lnp | grep 3183 tcp 0 0 0.0.0.0:3260 0.0.0.0:* LISTEN 3183/tgtd unix 2 [ ACC ] STREAM LISTENING 12133 3183/tgtd /var/run/tgtd.ipc_abstract_namespace.0 [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 ~]#

 

 

2. Reboot 후에도 iSCSI 서비스를 제공 할 수 있도록 Config 추가

 

[root@TEST01 ~]# [root@TEST01 ~]# tgt-admin --dump > /etc/tgt/targets.conf [root@TEST01 ~]# [root@TEST01 ~]# [root@TEST01 ~]# cat /etc/tgt/targets.conf | grep -v "#" default-driver iscsi <target iqn.2013-09.192.168.137.10:storage.iscsi1> backing-store /dev/sdb </target> [root@TEST01 ~]# [root@TEST01 ~]# [root@TEST01 ~]#

 

 

 

3. 할당된 Disk LUN 삭제시는 아래와 같이 수행

 

[root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# [root@TEST01 /]# tgtadm --lld iscsi --mode target --op delete --tid 1 (Target 볼륨 LUN 삭제) [root@TEST01 /]# [root@TEST01 /]#