linux扩展磁盘
容量告急
[root@yehao-pc-vm101 ~]# df -lh
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 13M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos_yehao-root 17G 16G 1.5G 92% /
/dev/sda1 1014M 151M 864M 15% /boot
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/b2cd1ac68f5598184196af1f94f9121b6864dfc1570d8cafcebd3ab5ce0ad690/merged
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/e2f8063e0970474dfc05006823942cc54deed476ba7b1ac3b6334c93b602a3e9/merged
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/c4b582c55dd7d5039efa9a74228085d4a124068ff3874988a32c829266f55276/merged
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/5c42577432af3c39f229849d0e45b49a379e08ce278d40cd2fd416a755fb2e68/merged
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/9be9740d809a40d24441008572e30e1898b8f47f62b3b8884e1ac4ae39b5df45/merged
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/05dc053b96f8858574c22d15bd20316393d1c45ce2d260f89a3e83773b8a8ed9/merged
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/d7334441c2a97c3435a18a7daa173feb92f79dd9d7bb6558d823afb70b04c53d/merged
tmpfs 378M 0 378M 0% /run/user/0
overlay 17G 16G 1.5G 92% /var/lib/docker/overlay2/7a695e0f335a6dee978adbdeda8f759d67e55e5764f2eac0ac89c0e8207ceea7/merged
查看磁盘分区
[root@yehao-pc-vm101 ~]# fdisk -l
磁盘 /dev/sda:214.7 GB, 214748364800 字节,419430400 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:dos
磁盘标识符:0x000bdf58
设备 Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 41943039 19921920 8e Linux LVM
磁盘 /dev/mapper/centos_yehao-root:18.2 GB, 18249416704 字节,35643392 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘 /dev/mapper/centos_yehao-swap:2147 MB, 2147483648 字节,4194304 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
扩充分区
[root@yehao-pc-vm101 ~]# 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):m
命令操作
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
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 (41943040-419430399,默认为 41943040):
将使用默认值 41943040
Last 扇区, +扇区 or +size{K,M,G} (41943040-419430399,默认为 419430399):
将使用默认值 419430399
分区 3 已设置为 Linux 类型,大小设为 180 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。
修改分区
[root@yehao-pc-vm101 ~]# 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):t
分区号 (1-3,默认 3):3
Hex 代码(输入 L 列出所有代码):L
0 空 24 NEC DOS 81 Minix / 旧 Linu bf Solaris
1 FAT12 27 隐藏的 NTFS Win 82 Linux 交换 / So c1 DRDOS/sec (FAT-
2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 3c PartitionMagic 84 OS/2 隐藏的 C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 40 Venix 80286 85 Linux 扩展 c7 Syrinx
5 扩展 41 PPC PReP Boot 86 NTFS 卷集 da 非文件系统数据
6 FAT16 42 SFS 87 NTFS 卷集 db CP/M / CTOS / .
7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux 纯文本 de Dell 工具
8 AIX 4e QNX4.x 第2部分 8e Linux LVM df BootIt
9 AIX 可启动 4f QNX4.x 第3部分 93 Amoeba e1 DOS 访问
a OS/2 启动管理器 50 OnTrack DM 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad 休 eb BeOS fs
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT
f W95 扩展 (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC
11 隐藏的 FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor
12 Compaq 诊断 5c Priam Edisk a9 NetBSD f4 SpeedStor
14 隐藏的 FAT16 <3 61 SpeedStor ab Darwin 启动 f2 DOS 次要
16 隐藏的 FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS
17 隐藏的 HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST 智能睡眠 65 Novell Netware b8 BSDI swap fd Linux raid 自动
1b 隐藏的 W95 FAT3 70 DiskSecure 多启 bb Boot Wizard 隐 fe LANstep
1c 隐藏的 W95 FAT3 75 PC/IX be Solaris 启动 ff BBT
1e 隐藏的 W95 FAT1 80 旧 Minix
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。
格式化磁盘
[root@yehao-pc-vm101 ~]# mkfs -t 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
11796480 inodes, 47185920 blocks
2359296 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=4294967296
1440 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, 11239424, 20480000, 23887872
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
将物理磁盘转为物理卷PV,扩展VG
将物理磁盘转为物理卷PV
[root@yehao-pc-vm101 ~]# 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.
查看分组并扩展VG
[root@yehao-pc-vm101 ~]# vgdisplay
--- Volume group ---
VG Name centos_yehao
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 <19.00 GiB
PE Size 4.00 MiB
Total PE 4863
Alloc PE / Size 4863 / <19.00 GiB
Free PE / Size 0 / 0
VG UUID cmHWbw-zoKA-Cp1M-1T9l-2IB0-hNY8-f2D9S6
[root@yehao-pc-vm101 ~]# vgextend centos_yehao /dev/sda3
扩展文件系统
将所有空闲空间都加入
[root@yehao-pc-vm101 ~]# lvextend -l +100%FREE /dev/mapper/centos_yehao-root
Size of logical volume centos_yehao/root changed from <17.00 GiB (4351 extents) to 196.99 GiB (50430 extents).
Logical volume centos_yehao/root successfully resized.
扩展xfs文件系统
[root@yehao-pc-vm101 ~]# xfs_growfs /dev/mapper/centos_yehao-root
meta-data=/dev/mapper/centos_yehao-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 51640320
完成
[root@yehao-pc-vm101 ~]# df -lh
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 13M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos_yehao-root 197G 16G 182G 8% /
/dev/sda1 1014M 151M 864M 15% /boot
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/b2cd1ac68f5598184196af1f94f9121b6864dfc1570d8cafcebd3ab5ce0ad690/merged
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/e2f8063e0970474dfc05006823942cc54deed476ba7b1ac3b6334c93b602a3e9/merged
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/c4b582c55dd7d5039efa9a74228085d4a124068ff3874988a32c829266f55276/merged
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/5c42577432af3c39f229849d0e45b49a379e08ce278d40cd2fd416a755fb2e68/merged
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/9be9740d809a40d24441008572e30e1898b8f47f62b3b8884e1ac4ae39b5df45/merged
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/05dc053b96f8858574c22d15bd20316393d1c45ce2d260f89a3e83773b8a8ed9/merged
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/d7334441c2a97c3435a18a7daa173feb92f79dd9d7bb6558d823afb70b04c53d/merged
tmpfs 378M 0 378M 0% /run/user/0
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/7a695e0f335a6dee978adbdeda8f759d67e55e5764f2eac0ac89c0e8207ceea7/merged
overlay 197G 16G 182G 8% /var/lib/docker/overlay2/518c23d18116d5fb25d167c1837ee1182268b6d81f5ac00eddfd18addf069036/merged