Linux storage technology and applications: Multipath multipath

1 , two servers each configuration two network cards

Store:

Eth0:192.168.1.20/24

Eth1:192.168.2.20/24

Node:

Eth0:192.168.1.10/24

Eth1:192.168.2.10/24

2 , Storage server configuration Targert

# vim/etc/tgt/targets.conf

<target iqn.2016-02.cn.tedu.tech:sata>

Backing-store/dev/sdb1

Initiator-address 192.168.1.10

Initiator-address 192.168.2.10

</target>

# Service TGTD Restart

# Chkconfig TGTD on

3 , discovering storage on the node

# Iscsiadm--mode Discovery--type sendtargets--portal 192.168.1.20--discover

# Iscsiadm--mode Discovery--type sendtargets--portal 192.168.2.20--discover

# Service iSCSI Restart

# chkconfig iSCSI on for automatic Login shared storage

# chkconfig Iscsid on Daemon Process

now through lsblk command, you can see two more hard drives on your host. Essentially, these two hard disks are stored on the same space.

4 , through multipath Multi-path configuration, two hard drives are configured with additional names Mpatha , using Mpatha , you can automatically use SDB or SDC .

Installing on a node multipath Software

# yum Install-y Device-mapper-multipath

Build configuration file

# mpathconf--user_friendly_names N

Editing a configuration file

# vim/etc/multipath.conf

will be Defaults section changes to the following content:

Defaults {

User_friendly_names No

getuid_callout "/lib/udev/scsi_id--whitelisted--device=/dev/%n"

}

Add at the end of the file:

multipaths {

multipath {

Wwid "1IET 00010001"

Alias Mpatha

}

}

5 , start the service

#/ETC/INIT.D/MULTIPATHD Start

# Chkconfig MULTIPATHD on

6 , view /dev/mapper directory, new device files will appear in this directory Mpatha

7 , Mpatha is the shared disk, which can be partitioned

# Fdisk-cu/dev/mapper/mpatha

partition, the first name is called a Mpathap1 , it can be directly mounted using the

# mount/dev/mapper/mpathap1/mnt

8 , loading multipath information

# MULTIPATH-RR

Linux storage technology and applications: Multipath multipath