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Cannot boot centos image

asked 2020-06-06 16:06:56 -0500

jenia gravatar image

updated 2020-06-06 18:22:02 -0500


I'm going through the OpenStack (installation guide) and I want to create the Controller Node.

Therefore I created a VM using QEMU and I wanted to boot in CentsOS using this image CentOS-7-ppc64le-GenericCloud.qcow2.xz from (offical OpenStack image list):

But I get "No bootable device" (error).

Why? I'm not getting it. I thought I needed to boot the OS from the image CentOS-7-ppc64le-GenericCloud.qcow2.xz and install the components there that make it into the controller node

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Comments This architecture is for 64-bit IBM POWER8 machines using little endian byte ordering.

Is this the architecture of your Controller?

Bernd Bausch gravatar imageBernd Bausch ( 2020-06-06 18:25:42 -0500 )edit

Definitely not. I didn't realize that it's for a different CPU than the regular X86. i just took the smallest/most-up-to-date image that was on the list. Thanks for the tip!!

jenia gravatar imagejenia ( 2020-06-06 18:48:52 -0500 )edit

Besides, you probably first need to uncompress the qcow2 file before booting from it.

Bernd Bausch gravatar imageBernd Bausch ( 2020-06-06 19:49:18 -0500 )edit

@Bernd Bausch ok. I downloaded (and extracted the raw file) CentOS-7-x86_64-GenericCloud.raw.tar.gz. Still. Exact same issue. I don't understand what the problem may be.

jenia gravatar imagejenia ( 2020-06-07 08:08:49 -0500 )edit

Share the configuration of your VM. Perhaps it expects a qcow2 file instead of a raw file.

Bernd Bausch gravatar imageBernd Bausch ( 2020-06-07 09:17:01 -0500 )edit

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answered 2020-06-27 20:28:06 -0500

jenia gravatar image

I figured it out :)

The CentOS-7-x86_64-GenericCloud.qcow2 is a virtual machine rather than a bootable kernel.

I got confused and instead of importing that file into Virtual Machine Managed as an existing VM, I was importing it as a kind of bootable kernel (is if it were an ISO image of the kernel).

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Asked: 2020-06-06 16:06:56 -0500

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Last updated: Jun 27 '20