centos7 扩展根分区

19-10-22 18:19 94  

``` pvcreate /dev/sdb3 vgdisplay vgextend centos_mb-centos7 /dev/sdb1 lvextend -l +100%FREE /dev/mapper/centos_mb--centos7-root xfs_growfs /dev/mapper/centos_mb--centos7-root ```