error: Requested operation is not valid: Disk does not support snapshotting

error: Requested operation is not valid: Disk  does not support snapshot

This error arises when you try to take a snapshot of a VM hard disk with virsh command
as shown below


virsh snapshot-create Clusterbase

error: Requested operation is not valid: Disk '/path/to/kvm/clusterbase.img' does not support snapshot.

If you see image of this VM is .img format, by default Virsh snapshot will work only for qcow2 format as of time of this post writing. So first convert that image to qcow2 format and then try to do a snapshot t with same command.

Convert img file to  qcow2 format


qemu-img convert -f raw -O qcow2 /path/to/kvm/clusterbase.img /path/to/kvm/clusterbase.qcow2

Hope this helps to resolve this error.

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Loaded plugins:fastest mirror Loading mirror speed from cached hosfile Setting up install process Nothing to do

Q. I am seeing below error when installing some packages


 Loaded plugins:fastest mirror
  Loading mirror speed from cached hosfile
  Setting up install process
  Nothing to do

This error will come when you execute below command

yum install somepackage

and the repo is set with "enable=0", try to change it or use --enablerepo= as shown below.

yum --enablerepo=yourreponame install somepackage


If you set enable=0 that indicates that dont include this repo when installing RPM packages. And enable=1 will include this repo when installing packages.

Hope this helps some one.

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error: command 'save' requires option

This error will come when you are trying to save VM using virsh command. When you try to save VM status using Virt-manager we no need to mention any file to save the status. Virt-manager will take care of saving it. But virsh have no mechanism like this. We have to provide a file to save the machine status.

virsh save domaname filename

Example
virsh save linux1 /opt/linux1.stat

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