LVM多路径版需要注意的几个点

多路径映射完成之后执行pvcreate发现 mpathb不能加入到pvcreate

pvcreate /dev/mapper/mpathb

Device /dev/mapper/mpathb1 excluded by a filter.

需要注意一下几点
kpartx -a /dev/mapper/mparhb

kpartx -l /dev/mapper/mpathb

生成 /dev/mapper/mpathb1

并且使用mpathb1

pvcreate /dev/mapper/mpathb1
Physical volume "/dev/mapper/mpathb1" successfully created.

需要在/etc/lvm/lvm.conf 添加配置识别mpath

　　filter = ["a|/dev/mapper/mpath.*|","r/.*/"]