4. A method for expanding disk space of xen virtual machine
Note: it is recommended to add a virtual disk file and then add lvm logical volumes to the virtual machine to increase disk space. The creation process is as follows.
1. Dd creates a disk file
# dd if=/dev/sdb1 bs=1024M count=6 > / data/dd3.img
two。 Shut down the dd virtual machine
Xm shutdown dd
3. Modify the new virtual machine profile
# vi / etc/xen/dd
# modify instructions:
(1) name
(2) uuid changes the last few data.
(3) change the disk to the actual path, and pay attention to the disk number when adding a new disk.
(4) vif modifies the MAC address of the network card to change the last few data
Name = "dd"
Uuid = "cc49eaea-fb0c-5239-c055-bdafcf209cab" 3a4 43a
Maxmem = 512
Memory = 512
Vcpus = 1
Bootloader = "/ usr/bin/pygrub"
On_poweroff = "destroy"
On_reboot = "restart"
On_crash = "restart"
Disk = ["tap:aio:/data/dd.img,xvda,w", "tap:aio:/data/dd3.img,xvdb,w"]
Vif = ["mac=00:16:3e:44:ee:07,bridge=xenbr1,script=vif-bridge"]
Note: if you use LVM logical volumes, use the following parameters, and use logical volumes in a large number of xen virtualized environments, which will maximize disk performance.
Disk = ["tap:aio:/data/test01.img,xvda,w", "phy:/dev/lvmdata/var01,xvdb,w"]
4. Start the virtual machine
5. Enter the virtual machine through the console
(1) View the newly added virtual disk
View logical volume size
Df-h
(2) start zoning
Fdisk / dev/xvdb
N
P
one
T
8e
W
# partprobe this statement failed
(3) create a physical volume
View volume groups, logical volumes
Vgs
Lvs
Create physical volumes and extend physical volume groups
Pvcreate / dev/xvdb1
Vgextend VolGroup / dev/xvdb1
Extended logical Volume
If the address of the logical volume is not found, press tab
Lvextend-l + 100%FREE / dev/VolGroup/lv_root
6. Extended disk partition
# resize2fs / dev/VolGroup/lv_root
Finally, the disk space has been expanded.
