Skip to main content

Converting Virtualization Image Formats with qemu-img convert

qemu-img is a practical tool to convert between multiple virtual disk image formats. As of qemu-img-0.12.1.2-2.479.el6.x86_64 supported formats are in the following list.

raw: Raw disk image format
qcow2: QEMU image format (copy-on-write)
qcow: Old QEMU image format
cow: User Mode Linux copy-on-write image format
vdi: VirtualBox 1.1 compatible image format
vmdk: VMware 3 and 4 compatible image format
vpc: VirtualPC compatible image format (VHD)
vhdx: Hyper-V compatible image format (VHDX)
cloop: Linux Compressed Loop image

A few examples:

kvm raw image to qcow2
$ qemu-img convert -f raw -O qcow2 raw-image.img qcow2-image.qcow2

kvm raw image to vmdk
$ qemu-img convert -f raw -O vmdk raw-image.img vmware-image.vmdk

vmdk to raw image
$ qemu-img convert -f vmdk -O raw vmware-image.vmdk raw-image.img

vmdk to qcow2
$ qemu-img convert -f vmdk -O qcow2 vmware-image.vmdk qcow2-image.qcow2

vdi to qcow2
$qemu-img convert -f vdi -O qcow2 vbox-image.vdi qcow2-image.qcow2

Comments

Popular posts from this blog

Creating Multiple VLANs over Bonding Interfaces with Proper Routing on a Centos Linux Host

In this post, I am going to explain configuring multiple VLANs on a bond interface. First and foremost, I would like to describe the environment and give details of the infrastructure. The server has 4 Ethernet links to a layer 3 switch with names: enp3s0f0, enp3s0f1, enp4s0f0, enp4s0f1 There are two bond interfaces both configured as active-backup bond0, bond1 enp4s0f0 and enp4s0f1 interfaces are bonded as bond0. Bond0 is for making ssh connections and management only so corresponding switch ports are not configured in trunk mode. enp3s0f0 and enp3s0f1 interfaces are bonded as bond1. Bond1 is for data and corresponding switch ports are configured in trunk mode. Bond0 is the default gateway for the server and has IP address 10.1.10.11 Bond1 has three subinterfaces with VLAN 4, 36, 41. IP addresses are 10.1.3.11, 10.1.35.11, 10.1.40.11 respectively. Proper communication with other servers on the network we should use routing tables. There are three

Listing Zimbra Accounts with Some Details

Recently I have to export the user list for a particular domain. Luckily Zimbra has Admin GUI with a search feature. When you search accounts, you can download search results as a comma-separated csv file. So I did a search and download the result file, but the result did not have all the columns I need and also there is no option for customizing columns for search results. So I had to write a bash script to get the desired list. Here is the bash script ( It can be customized by adding or removing field names. Run it under zimbra user like ./zimbra_account_list.sh <domain_name_here> ):