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Linux系统怎么配置多路径

时间:2015-05-26 17:08:53 作者:xiaowu 来源:系统之家 1. 扫描二维码随时看资讯 2. 请使用手机浏览器访问: https://m.xitongzhijia.net/xtjc/20150526/49327.html 手机查看 评论

  Linux多路径指的是除了主机和硬盘一条路径的连接,还包括了主机和网络服务器的连接形成的主机一对多的路径连接关系。通过多路径的连接,实现了磁盘的虚拟化。那么Linux系统怎么配置多路径?配置多路径步骤有哪些?本文就来为大家介绍一下。

Linux系统怎么配置多路径

  1、安装多路径软件包:

  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、设置开机启动,并检查安装包是否正常:

  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,编辑/etc/multipath.conf,开放如下内容:

  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、并关闭如下内容

  #blacklist {

  # devnode “*”

  #}

  #defaults {

  27 # user_friendly_names yes

  28 #}

  5、完成之后执行如下命令发现多路径:

  [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

  正在关闭multipathd 端口监控程序: [确定]

  正在启动守护进程multipathd: [确定]

  [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]#

  6、重启服务器后,我们可以看到多路径信息了:

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

  总计 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、通过fdisk 看可以生成了DM-0/DM-1两个盘,正是上面sdc/sde,sdb/sdd多路径后出来的:

  [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

  Disk /dev/sdf: 4009 MB, 4009754624 bytes

  255 heads, 63 sectors/track, 487 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Device Boot Start End Blocks Id System

  /dev/sdf4 * 1 488 3915744+ b W95 FAT32

  Partition 4 has different physical/logical endings:

  phys=(486, 254, 63) logical=(487, 125, 22)

  [root@RKDB01 ~]#

  8、我们同时也可以在/dev/mapper目录中查看到多路径映射的信息:

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

  总计 0

  crw------- 1 root root 10, 60 11-06 00:49 control

  brw-rw---- 1 root disk 253, 2 11-06 00:49 data-data001

  brw-rw---- 1 root disk 253, 0 11-06 00:49 mpath1

  brw-rw---- 1 root disk 253, 1 11-06 00:49 mpath2

  以上就是Linux系统配置多路径的教程,好像步骤比较多,但是这也是学习Linux的基础。

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