# 查看分区情况 # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sr0 11:0 1 1024M 0 rom xvda 202:0 0 100G 0 disk ├─xvda1 202:1 0 500M 0 part /boot └─xvda2 202:2 0 14.5G 0 part ├─centos-root 253:0 0 13G 0 lvm / └─centos-swap 253:1 0 1.5G 0 lvm [SWAP] # 新建分区 # fdisk /dev/xvda 欢迎使用 fdisk (util-linux 2.23.2)。 更改将停留在内存中,直到您决定将更改写入磁盘。 使用写入命令前请三思。 命令(输入 m 获取帮助):n Partition type: p primary (2 primary, 0 extended, 2 free) e extended Select (default p): p 分区号 (3,4,默认 3): 起始 扇区 (31457280-209715199,默认为 31457280): 将使用默认值 31457280 Last 扇区, +扇区 or +size{K,M,G} (31457280-209715199,默认为 209715199): 将使用默认值 209715199 分区 3 已设置为 Linux 类型,大小设为 85 GiB 命令(输入 m 获取帮助):w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: 设备或资源忙. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) 正在同步磁盘。 # 让内核重新识别分区 # partprobe #### lvm部分 # 然后创建物理卷pv # pvcreate /dev/xvda3 Physical volume "/dev/xvda3" successfully created # 查看pv信息 pvdisplay # 查看vg情况 # vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size 14.51 GiB PE Size 4.00 MiB Total PE 3714 Alloc PE / Size 3704 / 14.47 GiB Free PE / Size 10 / 40.00 MiB VG UUID qT52GT-QK7N-N2xq-j3Kt-0TLQ-mRCf-nU2U1g # 将pv加入vg # vgextend centos /dev/xvda3 # 查看vg空间,应该看到明显增大 # vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 2 Act PV 2 VG Size 99.50 GiB PE Size 4.00 MiB Total PE 25473 Alloc PE / Size 3704 / 14.47 GiB Free PE / Size 21769 / 85.04 GiB VG UUID qT52GT-QK7N-N2xq-j3Kt-0TLQ-mRCf-nU2U1g # 将新的vg空间扩展给lv lvextend -L +85G /dev/mapper/centos-root # 检查逻辑卷 e2fsck -f /dev/mapper/centos-root # 重新定义分区大小 resize2fs -f /dev/mapper/centos-root # 针对的是ext2、ext3、ext4文件系统 # centos 7 重新定义分区大小 xfs_growfs /dev/mapper/centos-root # 针对的是xfs文件系统