Configuring iSCSI networked Storage under Linux

1. server-side configuration

Experimental environment system version:

CentOS Linux release 7.3.1611 (Core)

1)Install packages

Yum-y Install TARGETCLI

2)to create an iSCSI storage to output

There are several types of devices that can be output:

A, LVM coil equipment;

B, a block device composed of files (after tgtimg tools processed);

C, a single partition;

D, the entire disk;

E, RAID a volume device consisting of;

An LVM logical volume is prepared here, as follows:

[[email protected] conf.d]# lvdisplay    --- Logical volume  ---  LV Path                 /dev/vg_dengqp03/LogVol01  LV Name                 LogVol01  VG Name                 vg_dengqp03  lv uuid                  wk1tx8-98eo-wxsn-tmdu-0yl8-8okh-7iiquo  lv write access         read/write  lv creation host, time dengqp03, 2016-04-19  03:43:00 -0400  LV Status               available  # open                  1  LV Size                 10.84 GiB  Current LE              2774  Segments                4  Allocation              inherit  Read ahead sectors      auto  - currently set to     8192  block  device           253:2

3)View Client Initiatorname user-created ACLs

[Email protected] ~]# CAT/ETC/ISCSI/INITIATORNAME.ISCSI initiatorname=iqn.1994-05.com.redhat:f958e9b53119

4)Configuring storage with TARGETCLI

[[email protected] conf.d]# targetcli warning: could not load  Preferences file /root/.targetcli/prefs.bin.targetcli shell version 2.1.fb41copyright  2011-2013 by datera, inc and others. for help on commands, type  ' Help ' . /> lso- /  .........................................................................................................................  [...]   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]/> /backstores/block create mydata /dev/mapper/vg_dengqp03-logvol01   //creating shared block storage Created block storage object mydata using /dev/mapper/vg_ Dengqp03-logvol01./> cd iscsi /iscsi> create iqn.2017-03.com.dengqp:server0   //Create a TargeTcreated target iqn.2017-03.com.dengqp:server0. Created tpg 1.global pref auto_add_default_portal=truecreated default portal  listening on all IPs  (0.0.0.0),  PORT 3260./ISCSI> LSO- ISCSI &NBSP, ... ..... ..... ..... ..... ..... ..... ..... ..... .................. ..... ..... ..... ..... ..... ..... ..... ..... ..... ...... ....... .......  [Targets: 1]  o- iqn.2017-03.com.dengqp:server0  ....... ..... ................. ......... ........ ................... .......  [tpgs: 1]     o- tpg1  ..... ..... ..... ..... ..... .............. .......... ..... ..... ..... ..... ..... ............. ..........  [ no-gen-acls, no-auth]      o- acls  ............................................................................................................  [Acls: 0]      o- luns&nbsp, ................... ..... .................. ......... ....... ..... ................. .........  [luns: 0]       o- portals  ..... ..... ..... ..... ..... ..... ..... ....... .............. ..... ..... ..... ..... ..... ............... .........  [ portals: 1]        o- 0.0.0.0:3260  ..... ..... ..... ..... ..... ..... ..... ....... .............. ..... ..... ..... ..... ..... ..... ............ ...........  [ ok]/iscsi> cd iqn.2017-03.com.dengqp:server0/tpg1//iscsi/iqn.20...:server0/tpg1> cd  portals//iscsi/iqn.20.../tpg1/portals> delete ip_address=0.0.0.0 ip_port=3260deleted  network portal 0.0.0.0:3260/iscsi/iqn.20.../tpg1/portals> create 10.20.2.237    //Create shared address, port defaults to 3260using default ip port 3260created network portal  10.20.2.237:3260./ISCSI/IQN.20.../TPG1/PORTALS> CD&NBSP, .... /iscsi/iqn.20...:server0/tpg1> luns/ create /backstores/block/mydata //Create a luncreated lun  on target 0./iscsi/iqn.20...:server0/tpg1> acls/ create iqn.1994-05.com.redhat:f958e9b53119 // ACLS directory create shared password created node acl for iqn.1994-05.com.redhat:f958e9b53119created mapped  LUN 0./iscsi/iqn.20...engqp:server0> cd //> lso- /  .........................................................................................................................  [...]   o- backstores  ..............................................................................................................  [...]   | o- block  ..... ..... ..... ..... ..... ............... ......... ..... ..... ..... ..... ..... ............. ..........  [ storage objects: 1]  | | o- mydata  ....  [/dev/mapper/vg_deng. ................ .....?????????????...qp03-logvol01  (10.8GiB)  write-thru activated]  | o- fileio  ..... ..... ..... ..... ..... .............. .......... ..... ..... ..... ..... ..... ............. ..........  [ storage objects: 0]  | o- pscsi  ..... ..... ..... ..... ..... ............... ......... ..... ..... ..... ..... ..... ............. ..........  [ storage objects: 0]  | o- ramdisk  ..... ..... ..... ..... ..... .............. .......... ..... ..... ..... ..... .............. ...........  [storage  Objects: 0]  o- iscsi  ............................................................................................................  [targets: 1]  | o- iqn.2017-03.com.dengqp:server0  .................................................................................... [tpgs: 1]   |   O- TPG1&NBSP: ..... ..... ..... ..... ....................................................................... [no-gen-acls, no-auth]  |      o- acls  ..........................................................................................................  [acls: 1]  |     | o- iqn.1994-05.com.redhat:f958e9b53119  .................................................................. [Mapped LUNs: 1]   |     |   o- mapped_lun0  ............................. ....................... ........  [lun0 block/mydata   (rw)]  |     o- luns  ..........................................................................................................  [luns: 1]  |     | o- lun0  ..... ..... ..... ..... ..... ..... .....  [b. ..... .....??????????????????..lock/mydata  (/DEV/MAPPER/VG_DENGQP03-LOGVOL01)]  |     o- portals &nbsp ..... ..... ..... ..... ..... ..... ..................... ..... ..... ..... ..... ..... ............... .........  [Portals: 1]  |       o- 10.20.2.237:3260  ..... ..... ..... ..... ..... .............. .......... ..... ..... ..... ..... ..... ............. ..........  [ok]   o- loopback  .........................................................................................................  [targets: 0]/> saveconfig      //Save Configuration Last 10 configs  saved in /etc/target/backup. Configuration saved to /etc/target/saveconfig.json/> exitglobal pref auto_ Save_on_exit=truelast 10 configs saved in /etc/target/backup. Configuration saved to /etc/target/saveconfig.json

5)Start the target service

[[Email protected] conf.d]# systemctl enable targetcreated symlink from  /etc/systemd/system/multi-user.target.wants/target.service to /usr/lib/systemd/system/ Target.service. [[EMAIL PROTECTED] CONF.D]# SYSTEMCTL START TARGET[[EMAIL PROTECTED] CONF.D ]# systemctl status target  target.service - Restore LIO kernel  target configuration   loaded: loaded  (/usr/lib/systemd/system/target.service;  enabled; vendor preset: disabled)    Active: active  (exited)  since mon 2017-03-27 03:33:22 edt; 4s ago  process: 14646  ExecStart=/usr/bin/targetctl restore  (code=exited, status=0/success)  main pid:  14646  (code=exited, status=0/success)  Mar 27 03:33:22 dengqp03  Systemd[1]: startinG restore lio kernel target configuration ... mar 27 03:33:22 dengqp03 systemd[1]: started restore lio kernel  Target configuration.

2.Client Configuration

Experimental environment system version:

CentOS Release 6.7 (Final)

1)Man Iscsiadm Viewing the examples in Help

Discover targets at a given IP address:

Iscsiadm--mode discoverydb--type sendtargets--portal 192.168.1.10--discover

Login, must use a node record ID found by the discovery:

Iscsiadm--mode node--targetname iqn.2001-05.com.doe:test--portal 192.168.1.1:3260--login

2)devices found on server-side output

[Email protected] samba]# iscsiadm--mode discoverydb--type sendtargets--portal 10.20.2.237--discover starting Iscsid: [OK]10.20.2.237:3260,1 Iqn.2017-03.com.dengqp:server0

3)Linked Devices

[Email protected] samba]# iscsiadm--mode node--targetname iqn.2017-03.com.dengqp:server0--portal 10.20.2.237:3260-- Login Logging in to [Iface:default, Target:iqn.2017-03.com.dengqp:server0, portal:10.20 .2.237,3260] (multiple) Login to [Iface:default, Target:iqn.2017-03.com.dengqp:server0, portal:10.20.2.237,3260] Successful.

4)View verify that the device is recognized

[[email protected] samba]# fdisk-l below for discovered networked storage disk/dev/sdb:11.6 GB, 11634999296 bytes64 heads, sectors/track, 11096 CY Lindersunits = Cylinders of 2048 * 1048576 bytessector size (logical/physical): bytes/512 bytesi/o Size (minim Um/optimal): bytes/4194304 bytesdisk identifier:0x00000000

5)Create an iSCSI mount point and Mount networked storage

[[email protected]/]# mkdir iscsi[[email protected]/]# mount/dev/sdb/iscsi///If you mount the following error, you need to use MKFS format before mounting mount:you m               UST Specify the filesystem Type[[email protected]/]# df-hfilesystem Size used Avail use% mounted ON/DEV/SDB 11G 4.1G 6.0G 41%/ISCSI

This article is from the "11528244" blog, please be sure to keep this source http://11538244.blog.51cto.com/11528244/1910810

Configuring iSCSI networked Storage under Linux