iSCSI : Configure Target (istgt)2023/12/28 |
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Configure Storage Server with iSCSI.
Storage server with iSCSI on network is called iSCSI Target, Client Host that connects to iSCSI Target is called iSCSI Initiator. +----------------------+ | +----------------------+ | [ iSCSI Target ] |10.0.0.30 | 10.0.0.51| [ iSCSI Initiator ] | | dlp.srv.world +----------+----------+ node01.srv.world | | | | | +----------------------+ +----------------------+ |
| [1] | Create disk space to be used as an iSCSI device. |
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root@dlp:~ # zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT zroot 27.5G 1.08G 26.4G - - 0% 3% 1.00x ONLINE - # for a case to create filesystem on existing ZFS pool root@dlp:~ # zfs create -V 10g zroot/ROOT/target01 root@dlp:~ # zfs list zroot/ROOT/target01 NAME USED AVAIL REFER MOUNTPOINT zroot/ROOT/target01 10.2G 25.6G 56K - # for a case to create image on filesystem root@dlp:~ # mkdir /home/iscsi_disks root@dlp:~ # dd if=/dev/zero of=/home/iscsi_disks/target02.img count=0 bs=1 seek=10G |
| [2] | Install [istgt] and configure iSCSI Target. |
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root@dlp:~ #
root@dlp:~ # pkg install -y istgt mv /usr/local/etc/istgt/istgt.conf /usr/local/etc/istgt/istgt.conf.org
root@dlp:~ #
vi /usr/local/etc/istgt/istgt.conf # create new [Global] # set your node base # recommended naming : [ iqn.(year)-(month).(reverse of domain name) NodeBase "iqn.2023-12.world.srv" PidFile /var/run/istgt.pid AuthFile /usr/local/etc/istgt/auth.conf MediaDirectory /var/istgt LogFacility "local7" Timeout 30 NopInInterval 20 DiscoveryAuthMethod Auto MaxSessions 16 MaxConnections 4 MaxR2T 32 MaxOutstandingR2T 16 DefaultTime2Wait 2 DefaultTime2Retain 60 FirstBurstLength 262144 MaxBurstLength 1048576 MaxRecvDataSegmentLength 262144 InitialR2T Yes ImmediateData Yes DataPDUInOrder Yes DataSequenceInOrder Yes ErrorRecoveryLevel 0 [UnitControl] AuthMethod CHAP AuthGroup AuthGroup01 Portal UC1 127.0.0.1:3261 Netmask 127.0.0.1 [PortalGroup01] # IP address and port the target listens Portal DA1 10.0.0.30:3260 [InitiatorGroup01] InitiatorName "ALL" # network range or IP address you allow to connect to the target Netmask 10.0.0.51/32 Netmask 10.0.0.61/32 [LogicalUnit01] # specify any name # this name is concatenated after [NodeBase] value # and the concatenated name becomes target IQN TargetName "dlp.target01" Mapping PortalGroup01 InitiatorGroup01 AuthMethod CHAP AuthGroup AuthGroup01 UseDigest Auto UnitType Disk # specify the disk you created LUN0 Storage /dev/zvol/zroot/ROOT/target01 Auto mv /usr/local/etc/istgt/auth.conf /usr/local/etc/istgt/auth.conf.org
root@dlp:~ #
vi /usr/local/etc/istgt/auth.conf # create new
# set CHAP username and secret
[AuthGroup01]
Auth "username" "userpassword"
mv /usr/local/etc/istgt/istgtcontrol.conf /usr/local/etc/istgt/istgtcontrol.conf.org
root@dlp:~ #
vi /usr/local/etc/istgt/istgtcontrol.conf # create new
[Global]
Timeout 60
AuthMethod CHAP
Auth "username" "userpassword"
Host 127.0.0.1
Port 3261
# the name is [(NodeBase):(TargetName)] you set in [istgt.conf]
TargetName "iqn.2023-12.world.srv:dlp.target01"
Lun 0
Flags "ro"
Size "auto"
chmod 600 /usr/local/etc/istgt/auth.conf /usr/local/etc/istgt/istgtcontrol.conf root@dlp:~ # echo 'istgt_enable="YES"' >> /etc/rc.conf root@dlp:~ # service istgt start Starting istgt. istgt version 0.5 (20150713) normal mode using kqueue using host atomic LU1 HDD UNIT LU1: LUN0 file=/dev/zvol/zroot/ROOT/target01, size=10737418240 LU1: LUN0 20971520 blocks, 512 bytes/block LU1: LUN0 10.0GB storage for iqn.2023-12.world.srv:dlp.target01 LU1: LUN0 serial 10000001 LU1: LUN0 read cache enabled, write cache enabled LU1: LUN0 command queuing enabled, depth 32root@dlp:~ # istgtcontrol list lun0 storage "/dev/zvol/zroot/ROOT/target01" 10737418240 DONE LIST command |
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