RHEL6配置multipath多路径软件连存储

RHEL6与5在多路径的配置上有一些小区别。scsi_id命令有些参数不再支持。在RHEL 6中获取磁盘的wwid可以通过–whitelist参数获取:

[root@db1 ~]# scsi_id --whitelist /dev/sdg 360060160a2212f00f8139df761ece111

可以通过一条shell命令，来获取系统所有磁盘的wwid：

# for i in `cat /proc/partitions ¦ awk {'print $4'} ¦grep sd`; do echo "### $i: `scsi_id --whitelist /dev/$i`"; done

在RHEL 5中，可以通过如下方式获取磁盘wwid：

# for i in `cat /proc/partitions ¦ awk {'print $4'} ¦grep sd`; do echo "### $i: `scsi_id -g -u -s /block/$i`"; done

另外，RHEL 6中，多路径配置文件也出现变化：


    # multipath.conf written by anaconda
    defaults {
    user_friendly_names yes
    }
    blacklist {
    devnode "^(ramrawloopfdmddm-srscdst)[0-9]*"
    devnode "^hd[a-z]"
    devnode "^dcssblk[0-9]*"
    device {
    vendor "DGC"
    product "LUNZ"
    }
    device {
    vendor "IBM"
    product "S/390.*"
    }
    # don't count normal SATA devices as multipaths
    device {
    vendor "ATA"
    }
    # don't count 3ware devices as multipaths
    device {
    vendor "3ware"
    }
    device {
    vendor "AMCC"
    }
    # nor highpoint devices
    device {
    vendor "HPT"
    }
    wwid "20080930-1"
    wwid "20080930-1"
    device {
    vendor Cisco
    product Virtual_CD_DVD
    }
    wwid "*" //其实可以注释这项，这样就不需要单独填写blacklist_exceptions
    }
    blacklist_exceptions { //排除在黑名单之外的wwid
    wwid "360060160a2212f00a67e0b91f2dbe111"
    wwid "360060160a2212f0044a0fc6ef5eae111"
    }
    multipaths {
    multipath {
    uid 0 //磁盘读所属用户uid
    gid 0 //磁盘所属组gid
    wwid "360060160a2212f00a67e0b91f2dbe111" //wwid号
    mode 0600 //磁盘读写权限
    }
    multipath {
    wwid "360060160a2212f0044a0fc6ef5eae111"
    alias data //别名
    }
    ... ... //还可以根据实际情况，配置其它磁盘的别名、uid、gid、mode etc...
    }

配置完了之后，重启multipathd服务，之后通过multipath -ll查看经过多路径软件绑定后的磁盘。
注意，如果要对磁盘进行格式化，请采用/dev/mapper/[alias]这类设备名进行fdisk。

转载请保留固定链接： https://linuxeye.com/configuration/1104.html

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RHEL6配置multipath多路径软件连存储