1. 前辈入虚拟机设置里增大磁盘空间
把稳：将25改成50，以扩大空间。这里一定要写比25大的数，由于他是“增加到”50GB，而不是“增加了25GB”
2. 下图可以看到，硬盘空间增大为53.7GB，在设备那里可以看到有两个分区，sda1跟sda2（请忽略sda3）。接下来增加一个分区。
键入命令：fdish /dev/sda
键入：m（获取帮助）
键入：n （增加分区）
键入：p（增加主分区）
键入：回车（起始跟结束扇区）
末了：w(退出)
把稳：“起始扇区”那里直接回车，随便乱写随意马虎造成空间摧残浪费蹂躏
现在系统就有3个分：sda1,sda2,sda3
3. 创建物理卷键入命令：pvcreate /dev/sda3
如果提示sda3找不到，键入：partprobe或者重启虚拟机。
4. 利用vgscan查询物理卷
4.1可以查到本机物理卷名称为“cl”，
4.2利用新增物理卷扩展cl：
键入命令：vgextendcl /dev/sda3
5. 扩展lv
键入命令：lvextend -L +24G 加上要扩展的分区名
接着用 dh –f，创造实际容量并没有变革，由于我们的系统还不认识刚刚添加进来的磁盘的文件系统，以是还须要对文件系统进行扩容。
键入：xfs_growfs 加上要扩展的分区名
或者
resize2fs – f 加 上要扩展的分区名
LVM XFS增加硬盘分区容量(resize2fs: Bad magic number in super-block while)
给某个硬盘增加分区之后
[root@Mysql01-213-66 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02 7.7G 2.6G 4.8G 36% /
tmpfs 495M 0 495M 0% /dev/shm
/dev/sda1 194M 29M 155M 16% /boot
/dev/mapper/vg_mysql0121366-LogVol01 8.0G 3.1G 5.0G 38% /data
这里增加/data大小
[root@Mysql01-213-66 ~]# fdisk -l /dev/sda
Disk /dev/sda: 40.8 GB, 40802189312 bytes
255 heads, 63 sectors/track, 4960 cylinders
Units = cylinders of 16065 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000eb81f
Device Boot Start End Blocks Id System
/dev/sda1 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 2350 18668544 8e Linux LVM
进行分区
[root@Mysql01-213-66 ~]# fdisk /dev/sda
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (2350-4960, default 2350):
Using default value 2350
Last cylinder, +cylinders or +size{K,M,G} (2350-4960, default 4960):
Using default value 4960
Command (m for help): p
Disk /dev/sda: 40.8 GB, 40802189312 bytes
255 heads, 63 sectors/track, 4960 cylinders
Units = cylinders of 16065 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000eb81f
Device Boot Start End Blocks Id System
/dev/sda1 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 2350 18668544 8e Linux LVM
/dev/sda3 2350 4960 20966832 83 Linux
Command (m for help): t
Partition number (1-4): 3
Hex code (type L to list codes): 8e
Changed system type of partition 3 to 8e (Linux LVM)
Command (m for help): w
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.
重启做事器或者 partprobe
创建物理卷
[root@Mysql01-213-66 ~]# pvcreate /dev/sda3
Physical volume \"大众/dev/sda3\"大众 successfully created
利用vgscan查询物理卷
[root@Mysql01-213-66 ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group \公众vg_mysql0121366\"大众 using metadata type lvm2
利用新增物理卷扩展vg
[root@Mysql01-213-66 ~]# vgextend vg_mysql0121366 /dev/sda3
Volume group \公众vg_mysql0121366\"大众 successfully extended
[root@Mysql01-213-66 ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group \"大众vg_mysql0121366\"大众 using metadata type lvm2
查询vg
[root@Mysql01-213-66 ~]# vgdisplay
--- Volume group ---
VG Name vg_mysql0121366
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 2
Act PV 2
VG Size 37.79 GiB
PE Size 4.00 MiB
Total PE 9675
Alloc PE / Size 4557 / 17.80 GiB
Free PE / Size 5118 / 19.99 GiB
VG UUID Zy2PVv-xSsx-NEAv-L6ba-G8Oy-tBBq-5zXKQm
查询lv
[root@Mysql01-213-66 ~]# lvdisplay
--- Logical volume ---
LV Path /dev/vg_mysql0121366/LogVol01
LV Name LogVol01
VG Name vg_mysql0121366
LV UUID 5znkJ2-wdeZ-Y2o1-ECDS-gzzl-PqaS-qo2yZR
LV Write Access read/write
LV Creation host, time Mysql01-213-66, 2015-08-30 20:42:13 +0800
LV Status available
# open 1
LV Size 8.00 GiB
Current LE 2048
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/vg_mysql0121366/LogVol00
LV Name LogVol00
VG Name vg_mysql0121366
LV UUID b1FV1n-iKyK-kZ23-glRO-opFh-gDRp-TzWNcL
LV Write Access read/write
LV Creation host, time Mysql01-213-66, 2015-08-30 20:42:14 +0800
LV Status available
# open 1
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg_mysql0121366/LogVol02
LV Name LogVol02
VG Name vg_mysql0121366
LV UUID eoVdk3-cbcP-9PlI-kZBL-6pY2-Jpbl-1WI2uH
LV Write Access read/write
LV Creation host, time Mysql01-213-66, 2015-08-30 20:42:14 +0800
LV Status available
# open 1
LV Size 7.80 GiB
Current LE 1997
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
[root@Mysql01-213-66 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02 7.7G 2.6G 4.8G 35% /
tmpfs 495M 0 495M 0% /dev/shm
/dev/sda1 194M 29M 155M 16% /boot
/dev/mapper/vg_mysql0121366-LogVol01 8.0G 3.1G 5.0G 38% /data
扩展lv
[root@Mysql01-213-66 ~]# lvextend -L +19G /dev/mapper/vg_mysql0121366-LogVol01
Extending logical volume LogVol01 to 27.00 GiB
Logical volume LogVol01 successfully resized
[root@Mysql01-213-66 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02 7.7G 2.6G 4.8G 35% /
tmpfs 495M 0 495M 0% /dev/shm
/dev/sda1 194M 29M 155M 16% /boot
/dev/mapper/vg_mysql0121366-LogVol01 8.0G 3.1G 5.0G 38% /data
若不是xfs我们可以用resize2fs，这里报错了
[root@Mysql01-213-66 ~]# resize2fs -f /dev/mapper/vg_mysql0121366-LogVol01
resize2fs 1.41.12 (17-May-2010)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/vg_mysql0121366-LogVol01
Couldn't find valid filesystem superblock.
[root@Mysql01-213-66 ~]# xfs_growfs /dev/mapper/vg_mysql0121366-LogVol01
meta-data=/dev/mapper/vg_mysql0121366-LogVol01 isize=256 agcount=4, agsize=524288 blks
= sectsz=512 attr=2, projid32bit=0
data = bsize=4096 blocks=2097152, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
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 2097152 to 7077888
[root@Mysql01-213-66 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02 7.7G 2.6G 4.8G 35% /
tmpfs 495M 0 495M 0% /dev/shm
/dev/sda1 194M 29M 155M 16% /boot
/dev/mapper/vg_mysql0121366-LogVol01 27G 3.1G 24G 12% /data
