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Linux 下配置多路径

发布时间:2019-09-01 06:10编辑:网站首页浏览(182)

    Linux 下配置多路径

    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

    [[email protected] 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
    [[email protected] 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
    [[email protected] 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

    [[email protected] Server]# chkconfig --level 345  multipathd on
    [[email protected] 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
    [[email protected] 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:

    [[email protected] Server]# modprobe dm-multipath
    [[email protected] Server]# multipath -F
    [[email protected] Server]# multipath dm-multipath
    [[email protected] Server]# multipath dm-round-robin
    [[email protected] 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]
    [[email protected] Server]# multipath -v2
    [[email protected] Server]# multipath -v2
    [[email protected] 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]
    [[email protected] Server]#

    6、重启服务器后,我们可以看到多路径信息了:

    [[email protected] ~]# 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
    [[email protected] ~]# 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:

    [[email protected] ~]# 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)
    [[email protected] ~]#

    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:

    [[email protected] ~]# 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

    9、参考:

    Red_Hat_Enterprise_Linux-5-DM_Multipath-en-US.pdf

    Red_Hat_Enterprise_Linux-5-DM_Multipath-zh-CN.pdf

    Red_Hat_Enterprise_Linux-6-DM_Multipath-en-US.pdf

    Red_Hat_Enterprise_Linux-6-DM_Multipath-zh-CN.pdf

    本文永久更新链接地址:

    下配置多路径 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 [[email protected] Server]# rp...

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