[centos+VMware] 硬盘容量扩展
2019-01-02 本文已影响1人
Hellooooooworld
part.0 环境
centos： 7.5.1804
VMware： 14.1.1
扩容大小：20G
part.1 增加VMware硬盘空间
1.1 关闭虚拟机
1.2 虚拟机-> 设置-> 硬盘 ->选中需要的硬盘扩展
part.2 新增硬盘分区
$ fdisk /dev/sda
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p #查看以分区数量（存在两个sda1和sda2）
Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000bc5e0
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 41943039 19921920 8e Linux LVM
Command (m for help): n # 新增一个分区
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p # 分区类型为主分区
Partition number (3,4, default 3): 3 #因为已经存在两个分区，所以分区号为3
First sector (41943040-83886079, default 41943040):
Using default value 41943040
Last sector, +sectors or +size{K,M,G} (41943040-83886079, default 83886079):
Using default value 83886079
Partition 3 of type Linux and of size 20 GiB is set
Command (m for help): t #修改分区类型
Partition number (1-3, default 3): 3 #分区号
Hex code (type L to list all codes): 8e #分区类型为8e
Changed type of partition 'XENIX usr' to 'Linux LVM'
Command (m for help): w # 写入分区表
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
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)
Syncing disks.
$ shutdown -r now # 分区后需要重启
part.3 硬盘格式化
$ mkfs.ext3 /dev/sda3
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1310720 inodes, 5242880 blocks
262144 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
160 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
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
part.4 添加新LVM到已存在的LVM，进行扩容
$ 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/sdb3
Device /dev/sdb3 not found.
lvm> vgextend centos /dev/sda3
Volume group "centos" successfully extended
lvm> lvextend -L +20G /dev/mapper/centos-root
Insufficient free space: 5120 extents needed, but only 5119 available
lvm> lvextend -L +19.9G /dev/mapper/centos-root
Rounding size to boundary between physical extents: 19.90 GiB.
Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to <36.90 GiB (9446 extents).
Logical volume centos/root successfully resized.
lvm> pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size <19.00 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4863
Free PE 0
Allocated PE 4863
PV UUID NhWECB-7yJu-3h3e-eJjI-Soqb-J3hM-JtBuRq
--- Physical volume ---
PV Name /dev/sda3
VG Name centos
PV Size 20.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 5119
Free PE 24
Allocated PE 5095
PV UUID pCXJQ8-1FN7-cG8d-tMBR-2QgF-VvHC-uJvUnM
lvm> quit
Exiting.
part.5 文件系统扩容
$ resize2fs /dev/mapper/centos-
centos-root centos-swap
[root@hadoop1 ~]# resize2fs /dev/mapper/centos-root
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root
Couldn't find valid filesystem superblock.
error： Bad magic number in super-block while trying to open /dev/mapper/centos-root，Couldn't find valid filesystem superblock.
出现上述错误时，尝试xfs_growfs
$ xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1113856 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=4455424, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 4455424 to 9672704
查看硬盘信息
$ df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/centos-root xfs 37G 17G 21G 46% /
devtmpfs devtmpfs 1.4G 0 1.4G 0% /dev
tmpfs tmpfs 1.4G 0 1.4G 0% /dev/shm
tmpfs tmpfs 1.4G 9.5M 1.4G 1% /run
tmpfs tmpfs 1.4G 0 1.4G 0% /sys/fs/cgroup
/dev/sdb1 ext4 9.8G 896M 8.4G 10% /usr/local/work
/dev/sda1 xfs 1014M 142M 873M 14% /boot
tmpfs tmpfs 283M 0 283M 0% /run/user/0
