LINUX_ISCSI Storage Services

Add 4 more drives to the TARGETD server:

Create a RAID5 and set up 1 backup failure disks:

Mdadm-cv/dev/md0-n 3-l 5-x 1/dev/sd{b,c,d,e}

To create a RAID array configuration file:

Mdadm-ds >/etc/mdadm.conf

Vim/etc/mdadm.conf

Device/dev/sdb/dev/sdc/dev/sdd/dev/sde

array/dev/md0 metadata=1.2 spares=2 name=localhost.localdomain:0 Uuid=5d5e7663:aa6e6ba2:0ece43d3:6b4c14d2

Installing the TARGETD and TARGETCLI kits

Yum install-y targetd targetcli

Start the service

Systemctl Start targetd

Systemctl Enable targetd

Creates a storage object.

Targetcli

To view the current storage directory tree:

/> ls

Enter the/backstores/block directory:

/> Cd/backstores/block

To create a device disk0 using/dev/md0:

/backstores/block> Create disk0/dev/md0

Go to the iSCSI directory:

/> CD/ISCSI

To create an iSCSI target target:

/iscsi> Create iqn.2017-08.domain.com:target01

Enter the LUNs directory to create the device information

/iscsi> CD Iqn.2017-08.domain.com:target01/tpg1/luns

/iscsi/iqn.20...t01/tpg1/luns> Create/backstores/block/disk0

/iscsi/iqn.20...t01/tpg1/luns> ls

O-luns ... [Luns:1]

O-lun0 ... [Block/disk0 (/DEV/MD0)]

Enter the portals directory to create the access IP and port

/iscsi/iqn.20...t01/tpg1/luns> CD. /portals/

/iscsi/iqn.20.../tpg1/portals> ls

O-portals ... [Portals:1]

O-0.0.0.0:3260 ... [OK]

/iscsi/iqn.20.../tpg1/portals> Delete 0.0.0.0 3260

Deleted Network Portal 0.0.0.0:3260

/iscsi/iqn.20.../tpg1/portals> Create 192.168.200.100 3260

Enter the ACLs directory to create client access control

/iscsi/iqn.20.../tpg1/portals> CD. /acls

/iscsi/iqn.20...t01/tpg1/acls> ls

O-acls ..... [acls:0]

/iscsi/iqn.20...t01/tpg1/acls> Create Iqn.2017-08.domain.com:webserver01

/iscsi/iqn.20...t01/tpg1/acls> Create Iqn.2017-08.domain.com:webserver02

Go to the root directory to display all information

/> CD/

/> ls

O/... ... .... ... .... ... .... ... ..... ..... ..... ..... ..... ..... .................... [...]

O-backstores ..... ..... ..... ..... ..... ........................ [...]

| O-block ........ ...................... [Storage Objects:1]

| | O-disk0 ........... [/dev/md0 (16.0GiB) Write-thru activated]

| O-fileio ....... ....................... [Storage objects:0]

| O-pscsi ........ ...................... [Storage objects:0]

| O-ramdisk ....... ....................... [Storage objects:0]

O-iscsi ..... ..... ..... ..... .......................... [Targets:1]

| O-iqn.2017-08.domain.com:target01 ......... .......... [Tpgs:1]

| O-tpg1 ........ ..................... [No-gen-acls, No-auth]

| O-acls ..... ..... ..... ........................... [Acls:2]

| | O-iqn.2017-08.domain.com:webserver01 ..... [Mapped Luns:1]

| | | O-mapped_lun0 ........ ......... [Lun0 block/disk0 (rw)]

| | O-iqn.2017-08.domain.com:webserver02 ..... [Mapped Luns:1]

|   | O-mapped_lun0 ........ ......... [Lun0 block/disk0 (rw)]

| O-luns ..... ..... ..... ........................... [Luns:1]

| | O-lun0 ......... ............... [Block/disk0 (/DEV/MD0)]

| O-portals ........ ........................ [Portals:1]

| O-192.168.200.100:3260 ........ ................... [OK]

O-loopback ..... ..... ..... .......................... [targets:0]

/> Saveconfig

/> Exit

Ss-ntlu | grep 3260

TCP LISTEN 0 256 192.168.200.100:3260

ISCSI Initiator Client Configuration

1. Installing the Iscsi-initiator-utils Package

Yum Install-y iscsi-initiator-utils

2. Edit the iSCSI Initiator client name file (the name matches the ACLs of the iSCSI server)

Vim/etc/iscsi/initiatorname.iscsi

#webserver01:

Initiatorname=iqn.2017-08.domain.com:webserver01

#webserver02:

Initiatorname=iqn.2017-08.domain.com:webserver02

3. Start the service

Systemctl Restart Iscsid.service

Systemctl Enable Iscsid.service

4. ISCSI Initiator client discovers and connects to the target end storage device

Iscsiadm--mode Discovery--type sendtargets--portal 192.168.200.100

192.168.200.100:3260,1 iqn.2017-08.domain.com:target01

Iscsiadm--mode node--targetname iqn.2017-08.domain.com:target01--portal 192.168.200.100:3260--login

Iscsiadm

--mode discovery or-M discovery "indicates Discovery Lookup

--type sendtargets or-t sendtargets or-T st "indicates the target of the publication

--portal ip:port or-p ip:port used to specify the server IP address

--mode node or-m nodes to manage the target

--login or-L indicates a login connection

--logout means log out connection

5. More than one hard drive/dev/sdb

Fdisk-l

6. Create a file system and mount it

Mkfs.xfs-f/dev/sdb

Mkdir/mnt/iscsi-disk01

mount/dev/sdb/mnt/iscsi-disk01/

7. Configure Auto Mount

Vim/etc/fstab

/dev/sdb/mnt/iscsi-disk01 XFS Defaults,_netdev 0 0

Set to automatically mount when powered on because the iSCSI server transmits data based on the IP network, we must add the parameter _netdev to the Fstab file, and then mount it on behalf of the network

df-h | Grep/dev/sdb

/dev/sdb 16G 33M 16G 1%/mnt/iscsi-disk01

Create a file test

Touch 1 2 3 4

ll

Total 0

-rw-r--r--1 root root 0 13 21:08 1

-rw-r--r--1 root root 0 13 21:08 2

-rw-r--r--1 root root 0 13 21:08 3

-rw-r--r--1 root root 0 13 21:08 4

Umount/dev/sdb

Webserver02 Mount

Mount/dev/sdb/mnt/iscsi-disk01

Ls

1 2 3 4

LINUX_ISCSI Storage Services