对新增加的硬盘进行分区
[root@vnode1 ~]# fdisk /dev/sda
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):p
....
设备 Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 83886079 41430016 8e Linux LVM
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):3
起始 扇区 (83886080-167772159,默认为 83886080):
将使用默认值 83886080
Last 扇区, +扇区 or +size{K,M,G} (83886080-167772159,默认为 167772159):
将使用默认值 167772159
分区 3 已设置为 Linux 类型,大小设为 40 GiB
命令(输入 m 获取帮助):t
分区号 (1-3,默认 3):3
Hex 代码(输入 L 列出所有代码):8e
已将分区“Linux”的类型更改为“Linux LVM”
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
重启机器
对新增加的硬盘格式化
[root@vnode1 ~]# mkfs.ext3 /dev/sda3
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
2621440 inodes, 10485760 blocks
524288 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=4294967296
320 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624
Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成
添加新LVM到已有的LVM组,实现扩容
[root@vnode1 ~]# lvm
lvm> pvcreate /dev/sda3
WARNING: ext3 signature detected on /dev/sda3 at offset 1080. Wipe it? [y/n]: y
Wiping ext3 signature on /dev/sda3.
Physical volume "/dev/sda3" successfully created
lvm> vgextend centos /dev/sda3
Volume group "centos" successfully extended
lvm> lvextend -L +39.9G /dev/mapper/centos-root
Rounding size to boundary between physical extents: 39.90 GiB
Size of logical volume centos/root changed from 35.47 GiB (9080 extents) to 75.37 GiB (19295 extents).
Logical volume root successfully resized.
lvm> pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size 39.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 10114
Free PE 0
Allocated PE 10114
PV UUID vtNvX3-b1yw-ePoh-YGHQ-tDhL-x0ru-mfts3k
--- Physical volume ---
PV Name /dev/sda3
VG Name centos
PV Size 40.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 10239
Free PE 34
Allocated PE 10205
PV UUID jWqvcF-R53u-ZeAy-zO2L-PbtI-51VP-yHNZ1g
lvm> quit
Exiting.
[root@vnode1 ~]#
因为我的centos7的某些分区用的是xfs的文件系统
[root@vnode1 ~]# df -T
文件系统 类型 1K-块 已用 可用 已用% 挂载点
/dev/mapper/centos-root xfs 37173520 5574340 31599180 15% /
devtmpfs devtmpfs 3987400 0 3987400 0% /dev
tmpfs tmpfs 3997856 0 3997856 0% /dev/shm
tmpfs tmpfs 3997856 8628 3989228 1% /run
tmpfs tmpfs 3997856 0 3997856 0% /sys/fs/cgroup
/dev/sda1 xfs 508588 127152 381436 26% /boot
tmpfs tmpfs 799572 0 799572 0% /run/user/0
[root@vnode1 ~]#
xfs_growfs
[root@vnode1 ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=2324480 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=9297920, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=4540, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 9297920 to 19758080
看到扩容后的磁盘空间
[root@vnode1 ~]# df -h
文件系统 容量 已用 可用 已用% 挂载点
/dev/mapper/centos-root 76G 5.4G 71G 8% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.5M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 497M 125M 373M 26% /boot
tmpfs 781M 0 781M 0% /run/user/0