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Instance recovery using qemu-nbd

OS: Centos7

Openstack version : Juno

I was trying the recovery methods mentioned in docs.openstack.org/openstack-ops/content/maintenance.html

Mainly recovery of the Data in the instance Disk created @ /var/lib/nova/instances/xxxxxxx.instance-uuid-xxxxxx/disk

They are trying to mount the disk file using qemu-nbd command which gives me no result. When I try to modprobe the nbd module I get the following error.

modprobe: FATAL: Module nbd not found.

I was not able to find the package which gives the module.

Instance recovery using qemu-nbd

OS: Centos7

Openstack version : Juno

I was trying the recovery methods mentioned in docs.openstack.org/openstack-ops/content/maintenance.html

Mainly recovery of the Data in the instance Disk created @ /var/lib/nova/instances/xxxxxxx.instance-uuid-xxxxxx/disk

They are trying to mount the disk file using qemu-nbd command which gives me no result. When I try to modprobe the nbd module I get the following error.

modprobe: FATAL: Module nbd not found.

I was not able to find the package which gives the module.

any one have any idea regarding recovery of data from the data file of the instance.