Managing your cloud resources with OpenStack: Difference between revisions

If an attached volume is the boot volume for the VM (e.g. attached to <code>/dev/vda</code>) the VM must be deleted before the volume can be detached. If on the other hand, the volume has been attached to the VM as an additional volume (e.g. attached to <code>/dev/vdb</code>, <code>/dev/vdc</code>, etc.) it can be detached by going to "Project"->"Volumes"->"Volumes" and then finding the row for the particular volume you wish to detach and going to the drop down box at the far right under the "Actions" column and selecting "Manage Attachements". On the new "Manage Volume Attachements" screen which appears, the instance the volume is attached to will be listed, next to wich will be a "Detach Volume" button. Click this button to detach the volume, it will ask you to confirm you want to detach this volume by clicking the "Detach Volume" button on a second screen that appears. If you try this proceedure on a boot volume you will get an error message saying "Unable to detach volume".