VM is stuck in bootup
I have moved a VM from Xen hypervisor to Openstack which runs on KVM hypervisor. I have downloaded the xen VM snapshot in XVA format and converted the checksum files into RAW (.img) format. Uploaded the image into glance image repository and launched a new VM instance. Currently the instance is stuck in the page and it hangs there in openstack vnc console.
[*** ] A start job is running for dev-mapp..root.device (40min 18s / no limit)
The image is RHEL 7 Operating system and it had only one disk 100G.
Please help!!
Googling for "A start job is running for dev-mapper" yields a few 100 results; many seem to point to LUKS. You need to find the one that best fits your situation.
Other suggestions:
Launch a VM from that image without OpenStack. Interrupt Grub and boot into single-user mode, or use system startup debugging (personally I don't know how to debug these; I would use Google to find startup troubleshooting procedures).
Thanks Bernd for you suggestions. I already tried to run it in the single user mode, nothing was helping using the virt-viewer.