为EXSi5.5上的Centos虚机增加硬盘容量

宿主机调整

1. 关闭虚机,

2. 检查是否有存在的snapshot, 如果有, 需要删除, 否则不能调整磁盘容量

3. 虚机上编辑配置, 将磁盘容量调大后保存

虚机调整

参考这篇写得非常详细: 点击查看

To extend the logical volume:

Note: These steps only apply to EXT3 file systems.

Caution: VMware recommends having a complete backup of the virtual machine prior making these changes.

Power off the virtual machine.
Edit the virtual machine settings and extend the virtual disk size. For more information, see Increasing the size of a virtual disk (1004047).
Power on the virtual machine.
Identify the device name, which is by default /dev/sda, and confirm the new size by running the command:
```
fdisk -l
```
Create a new primary partition:
1. Run the command:
```
fdisk /dev/sda (depending the results of the step 4)
```
2. Press p to print the partition table to identify the number of partitions. By default there are 2: sda1 and sda2.
3. Press n to create a new primary partition.
4. Press p for primary.
5. Press 3 for the partition number, depending the output of the partition table print.
6. Press Enter two times.
7. Press t to change the system's partition ID
8. Press 3 to select the newly creation partition
9. Type 8e to change the Hex Code of the partition for Linux LVM
10. Press w to write the changes to the partition table.
Restart the virtual machine.
Run this command to verify that the changes were saved to the partition table and that the new partition has an 8e type:
```
fdisk -l
```
Run this command to convert the new partition to a physical volume:
Note: The number for the sda can change depending on system setup. Use the sda number that was created in step 5.
```
pvcreate /dev/sda3
```
Run this command to extend the physical volume:
```
vgextend VolGroup00 /dev/sda3
```
Note: To determine which volume group to extend, use the command vgdisplay.
Run this command to verify how many physical extents are available to the Volume Group:
```
vgdisplay VolGroup00 | grep "Free"
```
Run the following command to extend the Logical Volume:
```
lvextend -L+#G /dev/VolGroup00/LogVol00
# or
lvextend -l +15359 /dev/VolGroup/lv_root 
```
Where # is the number of Free space in GB available as per the previous command. Use the full number output from Step 10 including any decimals.

Note: to determine which logical volume to extend, use the command lvdisplay.
Run the following command to expand the ext3 filesystem online, inside of the Logical Volume:
```
ext2online /dev/VolGroup00/LogVol00
```
Note: Use resize2fs instead of ext2online if it is not a Red Hat virtual machine.
Note: Use xfs_growfs if that LVM is using xfs as their file system. (Try mount |grep xfs to check it)
Run the following command to verify that the / filesystem has the new space available:
```
df -h /
```

对于新建LVM的系统

Run the following to create the Logical Volume: (if the volume group is newly created)

lvcreate -n LogVol00 --size 255G VolGroup00
#or
lvcreate -n LogVol00 -l 262143 VolGroup00
#then
mke2fs /dev/VolGroup00/LogVol00
#then make dir and mount it
mkdir /archive
mount /dev/VolGroup00/LogVol00 /archive
#then write it to /etc/fstab to make it mount upon startup

#
# /etc/fstab
# Created by anaconda on Mon Mar 19 11:38:35 2012
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=6362f46a-8e70-4c3e-9f07-d5666a8db4b0 /                       ext4    defaul
ts        1 1
UUID=7999a0fb-4c24-4e20-817c-47afd387cc51 swap                    swap    defaul
ts        0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
/dev/VolGroup00/LogVol00 /archive               ext4    defaults        0 0