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How to launch a VM that use dev=vda and bus=virtio using nova??

Hello,

My OpenStack cluster(newton) is based on KVM virtualization. I found that all the instances Iam launching is using dev=sda and bus=scsi. How can I launch an Instance that using dev=vda and bus=virtio?? Or I want to make virtio as default for all VMs. Is there any option exists for this?? Any help is really appreciated.

How to launch a VM that use dev=vda and bus=virtio using nova??

Hello,

My OpenStack cluster(newton) is based on KVM virtualization. I found that all the instances Iam launching is using dev=sda and bus=scsi. How can I launch an Instance that using dev=vda and bus=virtio?? Or I want to make virtio as default for all VMs.

I tried to set the image-property as below

glance image-update --property hw_disk_bus=virtio 30393b62-c98e-4282-9fcc-0acc307f0c01

Then I tried to launch a new instance with this image but still it is using dev=sda and bus=scsi. I dont know how to change it. Is there any option exists for this?? Any help is really appreciated. appreciated.