How to expand disk space of xen virtual machine

With the extensive use of virtualization technology, there are more and more ideas about using virtualization, such as directly expanding the disk space. In this case, I recommend the method of adding a new disk, which is consistent with the normal use of physical machines. Way.

There is another way to increase disk space, which is to directly expand the space of the existing disk. This method is used in this article.

1. View the virtual machine configuration file

xm list

##2. The dd2 virtual machine uses /data /dd2.img

3. Directly expand the existing virtual disk space

Now check the virtual machine disk file size

ll -h

Directly extend the virtual machine disk file

dd if=/dev/sdb1 bs=1024M count=4 > ;>/data/dd2.img

has been expanded to 10G, let’s enter the virtual machine for configuration

4. Start and enter the virtual machine and partition

virt-manager &

(1) Enter the virtual machine Machine console

(2) Check the disk partition

It is found that the disk space has not changed and the disk space has not changed. The size has been expanded to 10G. If you directly add the expanded space, you can create another partition and use it directly. Merge the newly created partition directly into the current LVM logical volume.

(3) Partition

Add the new disk Add the unused disk space to create a new primary partition /dev/xvda3, and identify the disk as the lvm partition

fdisk /dev/xvda

n

p

##3

t

3

8e

w

5. Merge the new partition into the LVM logical volume

(1) Create a physical volume

pvcreate /dev/xvda3

pvs

##(2) Create a logical volume group

vgs

vgextend VolGroup /dev/xvda3

##(3) Extend the existing logical volume

lvs

##lvextend -l 100%FREE /dev/VolGroup/lv_root

(4) resize extended logical partition

resize2fs /dev/VolGroup/lv_root

At this time, add disk space and the expansion is completed.

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