Ask Your Question

Attach ISO image as CDROM to windows instance

asked 2017-04-14 10:43:29 -0500

SunilVP gravatar image


I have windows 2012 instance running successfully on Openstack Newton on Ubuntu 16.04. All I need is to add an ISO image to the windows instance and be seen by the instance as a CDROM. My /var/lib/nova/instance/xxxxx/libvirt.xml, has no option for CDROM device When I start my instance using $openstack server start mywin, it starts successfully, how do I add an ISO image as CDROM to this instance #virsh attach-disk instance-00000009 ~/virtio-win-0.1.126.iso hdc --type cdrom --mode readonly --config When I run virsh attach-disk it attaches successfully and it update : /etc/libvirt/qemu/instance-0000xx9.xml properly. However it does not reflect on /var/lib/nova/instance/xxxxx/libvirt.xml. I have no idea how to influence the /var/lib/nova/instance/xxxxx/libvirt.xml to see the cdrom Any help will be appreciated.

edit retag flag offensive close merge delete

3 answers

Sort by » oldest newest most voted

answered 2017-04-20 11:12:01 -0500

SunilVP gravatar image

Now i know for sure nova boot command works to add CD-ROM to an instance, as indicated in my comment. It would be great if this works with $ openstack server add volume --device /dev/hda <instancename> <volumename> The problem with this command, it attaches my volume as /dev/vdb and not as /dev/hda, if this works we don't need nova boot command, can someone tell me why it is not accepting the /dev/hda parameter, where do i go to see the error for this command?

edit flag offensive delete link more

answered 2017-04-17 15:19:00 -0500

Bernd Bausch gravatar image

updated 2017-04-17 15:22:47 -0500

virsh is not an OpenStack command. You can't expect it to update OpenStack data structures. Try, for example. Or attach it at boot time.

edit flag offensive delete link more


Hi, I followed the first suggestion, however this is recognized by Windows Instance as a disk and not as cdrom. Your second suggestion I will try and revert.

SunilVP gravatar imageSunilVP ( 2017-04-17 23:36:00 -0500 )edit

It seems to me that the CLIs don't allow attaching a CDROM to a running instance. When launching an instance with nova boot, you can probably use the --block-device option to attach a CDROM at boot time. The openstack server create command doesn't allow even that.

Bernd Bausch gravatar imageBernd Bausch ( 2017-04-18 20:37:40 -0500 )edit

E.g. --block-device source=image,id=IMAGE_ID,type=cdrom. I didn't test this; more parameters might be required.

Bernd Bausch gravatar imageBernd Bausch ( 2017-04-18 20:41:05 -0500 )edit

I have gotten a workaround, I just copied the ISO image via network to windows instance, then mounted it as CDROM, this works. Although this is not what I want, but atleast this option is there to install third party software to the instance. Nova Boot did not get time yet, will update the results

SunilVP gravatar imageSunilVP ( 2017-04-18 21:47:33 -0500 )edit

nova boot --flavor m2.Win --image 8af1c6f0-2440-4f91-a8c5-1cb66455b152 --key-name mykey --nic net-id=dc2ef45f-1a4e-460d-b4c8-6df1d5983364 --block-device id=90acd25c-60ad-425d-95a4-5189c90d7d41,source=image,dest=volume,bus=ide,device=/dev/hda,size=1,type=cdrom,bootindex=1 mywin4 This command works

SunilVP gravatar imageSunilVP ( 2017-04-20 10:21:15 -0500 )edit

answered 2017-04-17 20:46:55 -0500

vblando gravatar image

Do a workaround

  1. Convert Windows CDROM to ISO
  2. Upload ISO to Glance
  3. Create a volume with image as source and load your uploaded ISO there
  4. Attach the volume to your Instance
edit flag offensive delete link more


Hi, Thanks, when I do this method, in the windows instance this ISO volume is seen as a disk, which needs formatting, this is not what I want, when I attach the volume it should pick it up as a CDROM device and not as a disk device.

SunilVP gravatar imageSunilVP ( 2017-04-17 23:34:26 -0500 )edit

When you do the 4th step, it uses wrong device /dev/vdb hence cannot work as CDROM

SunilVP gravatar imageSunilVP ( 2017-04-20 10:24:35 -0500 )edit

some time ago I tried to attach ISO with virtIO drivers during windows install and and after many attempts I did not succeed so I abandoned it. If you want to do it for the same reason(for. ex to create windows image) I recommend to make it outside openstack and then upload ready image to glance.

Damian Dąbrowski gravatar imageDamian Dąbrowski ( 2017-04-20 15:42:32 -0500 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower


Asked: 2017-04-14 10:43:29 -0500

Seen: 48 times

Last updated: Apr 20