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。