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Linux系統怎麼配置多路徑

  Linux多路徑指的是除了主機和硬盤一條路徑的連接,還包括了主機和網絡服務器的連接形成的主機一對多的路徑連接關系。通過多路徑的連接,實現了磁盤的虛擬化。那麼Linux系統怎麼配置多路徑?配置多路徑步驟有哪些?本文就來為大家介紹一下。

Linux系統怎麼配置多路徑

  1、安裝多路徑軟件包:

  device-mapper-1.02.67-2.el5

  device-mapper-event-1.02.67.2.el5

  device-mapper-multipath-0.4.7-48.el5

  [root@RKDB01 Server]# rpm -ivh device-mapper-1.02.67-2.el5.x86_64.rpm

  warning: device-mapper-1.02.67-2.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186

  Preparing.。。 ########################################### [100%]

  package device-mapper-1.02.67-2.el5.x86_64 is already installed

  [root@RKDB01 Server]# rpm -ivh device-mapper-event-1.02.67-2.el5.x86_64.rpm

  warning: device-mapper-event-1.02.67-2.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186

  Preparing.。。 ########################################### [100%]

  package device-mapper-event-1.02.67-2.el5.x86_64 is already installed

  [root@RKDB01 Server]# rpm -ivh device-mapper-multipath-0.4.7-48.el5.x86_64.rpm

  warning: device-mapper-multipath-0.4.7-48.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186

  Preparing.。。 ########################################### [100%]

  package device-mapper-multipath-0.4.7-48.el5.x86_64 is already installed

  2、設置開機啟動,並檢查安裝包是否正常:

  chkconfig --level 345 multipathd on

  lsmod |grep dm_multipath

  [root@RKDB01 Server]# chkconfig --level 345 multipathd on

  [root@RKDB01 Server]# lsmod |grep dm_multipath

  dm_multipath 58969 0

  scsi_dh 42561 1 dm_multipath

  dm_mod 102417 4 dm_mirror,dm_multipath,dm_raid45,dm_log

  [root@RKDB01 Server]#

  3、配置multipathd 使其正常工作,編輯/etc/multipath.conf,開放如下內容:

  defaults {

  udev_dir /dev

  polling_interval 10

  selector “round-robin 0”

  path_grouping_policy multibus

  getuid_callout “/sbin/scsi_id -g -u -s /block/%n”

  prio_callout none

  path_checker readsector0

  rr_min_io 100

  max_fds 8192

  rr_weight priorities

  failback immediate

  no_path_retry fail

  user_friendly_names yes

  }

  blacklist {

  wwid 26353900f02796769

  devnode “^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*”

  devnode “^hd[a-z]”

  }

  4、並關閉如下內容

  #blacklist {

  # devnode “*”

  #}

  #defaults {

  27 # user_friendly_names yes

  28 #}

  5、完成之後執行如下命令發現多路徑:

  [root@RKDB01 Server]# modprobe dm-multipath

  [root@RKDB01 Server]# multipath -F

  [root@RKDB01 Server]# multipath dm-multipath

  [root@RKDB01 Server]# multipath dm-round-robin

  [root@RKDB01 Server]# service multipathd restart

  正在關閉multipathd 端口監控程序: [確定]

  正在啟動守護進程multipathd: [確定]

  [root@RKDB01 Server]# multipath -v2

  [root@RKDB01 Server]# multipath -v2

  [root@RKDB01 Server]# multipath -ll

  mpath1 (3600d02310000011b16a5d57c6a1bd99a) dm-0 TOYOU,NetStor_iSUM510

  [size=3.3T][features=0][hwhandler=0][rw]

  \_ round-robin 0 [prio=2][ena bled]

  \_ 1:0:0:0 sdb 8:16 [failed][ready]

  \_ 1:0:1:0 sdc 8:32 [failed][ready]

  [root@RKDB01 Server]#

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  6、重啟服務器後,我們可以看到多路徑信息了:

  [root@RKDB01 ~]# ll /dev/mapper/

  總計 0

  crw------- 1 root root 10, 60 11-05 22:35 control

  brw-rw---- 1 root disk 253, 0 11-05 22:35 mpath1

  brw-rw---- 1 root disk 253, 1 11-05 22:35 mpath2

  [root@RKDB01 ~]# multipath -ll

  mpath2 (3600d02310000011b76128b9c63138cf4) dm-1 TOYOU,NetStor_iSUM510

  [size=3.2T][features=0][hwhandler=0][rw]

  \_ round-robin 0 [prio=2][active]

  \_ 1:0:0:1 sdc 8:32 [active][ready]

  \_ 1:0:1:1 sde 8:64 [active][ready]

  mpath1 (3600d02310000011b16a5d57c6a1bd99a) dm-0 TOYOU,NetStor_iSUM510

  [size=20G][features=0][hwhandler=0][rw]

  \_ round-robin 0 [prio=2][active]

  \_ 1:0:0:0 sdb 8:16 [active][ready]

  \_ 1:0:1:0 sdd 8:48 [active][ready]

  7、通過fdisk 看可以生成了DM-0/DM-1兩個盤,正是上面sdc/sde,sdb/sdd多路徑後出來的:

  [root@RKDB01 ~]# fdisk -l

  Disk /dev/sda: 299.4 GB, 299439751168 bytes

  255 heads, 63 sectors/track, 36404 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Device Boot Start End Blocks Id System

  /dev/sda1 * 1 38 305203+ 83 Linux

  /dev/sda2 39 13092 104856255 83 Linux

  /dev/sda3 13093 19619 52428127+ 83 Linux

  /dev/sda4 19620 36404 134825512+ 5 Extended

  /dev/sda5 19620 26146 52428096 83 Linux

  /dev/sda6 26147 28757 20972826 83 Linux

  /dev/sda7 28758 30324 12586896 82 Linux swap / Solaris

  /dev/sda8 30325 36404 48837568+ 83 Linux

  Disk /dev/sdb: 21.4 GB, 21474836480 bytes

  255 heads, 63 sectors/track, 2610 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Disk /dev/sdb doesn‘t contain a valid partition table

  Disk /dev/sdc: 3568.4 GB, 3568429957120 bytes

  255 heads, 63 sectors/track, 433836 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Disk /dev/sdc doesn’t contain a valid partition table

  Disk /dev/sdd: 21.4 GB, 21474836480 bytes

  255 heads, 63 sectors/track, 2610 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Disk /dev/sdd doesn‘t contain a valid partition table

  Disk /dev/sde: 3568.4 GB, 3568429957120 bytes

  255 heads, 63 sectors/track, 433836 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Disk /dev/sde doesn’t contain a valid partition table

  Disk /dev/dm-0: 21.4 GB, 21474836480 bytes

  255 heads, 63 sectors/track, 2610 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Disk /dev/dm-0 doesn‘t contain a valid partition table

  Disk /dev/dm-1: 3568.4 GB, 3568429957120 bytes

  255 heads, 63 sectors/track, 433836 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Disk /dev/dm-1 doesn’t contain a valid partition table

  Di

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