Andrey: Today I was successfully able to get our OpenStack experts to reply to the questions that had been triggered by our recent meeting. I will list the questions below along with replies to them. Please mind that I didn't test the APIs that could retrieve some values, so it's up to *Mamasu *to do that and let me know the results.
*The questions are:* 1) Find out if an image that is being used by a VM/server can be removed from OpenStack via Glance (or if there are any APIs enabling the user to do so). 2) Can RAM/CPU/other parameters can be retrieved in OpenStack from a template by means of any APIs? 3) Image: What type of information can be retrieved re an image (OS/ all the possible parameters) - metadata ? *Please see the replies below:* 1) it's possible to remove an image that is being referenced by any VM/instance via Glance/API (an image is copied to a compute node when it's provisioned). The folder is: instance/_base 2) it's also possible to get various flavor parameters by invoking *nova flavor-list* (http://developer.openstack.org/api-ref-compute-v2.html). */v2/{tenant_id}/flavors/detail* needs to be called. *minRam *and *minDisk *parameters can be specified. However, I am not sure why the 'min' prefix is in place.. Will try to clarify this with our OpenStack experts. *vcpu (number of cores), ram, disk can be retrieved (response json)* 3) There is an image API enabling the retrieval of an image parameters. A link to it is here: http://developer.openstack.org/api-ref-image-v2.html. However, neither OS nor the number of instances are in the list (only the *image link prop* is in the main list). The number of instances using an image can be retrieved by invoking the following: *nova list --all-tenants --image <image_UUID>*. The API reference is here:http://developer.openstack.org/api-ref-compute-v2.html. In order to retrieve the OS, please take a look at *xsd:dict Properties* key-value tags. It should be contained there (according to our specialist). *A question for Andrey: Andrey, do you have access to our Jira? If so, I would be able to share our tickets containing questions with you. It would be more convenient.* Please let me know if there are any questions in this regards. Thanks. Kind Regards, Dmitry.
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