It is a disk image (could be raw/cow, preallocated/thin provisioned). But is just a file. The REST API doesn't take a file path to convert the disk image into a system disk.
-----Original Message----- From: Itamar Heim [mailto:[email protected]] Sent: Monday, January 20, 2014 1:37 PM To: Satya Vempati; Juan Hernandez; [email protected] Subject: Re: [Users] Register a disk image via oVirt REST api On 01/20/2014 11:36 PM, Satya Vempati wrote: > Well, the crux of the problem is that there doesn't seem to be a way to > convert the disk image I have into a disk that the system will recognize. why, which format is it? > > -----Original Message----- > From: Itamar Heim [mailto:[email protected]] > Sent: Monday, January 20, 2014 1:32 PM > To: Satya Vempati; Juan Hernandez; [email protected] > Subject: Re: [Users] Register a disk image via oVirt REST api > > On 01/20/2014 11:30 PM, Satya Vempati wrote: >> Thanks Juan and Itamar. >> >> As Juan said, I am trying take a file that I have that contains the >> image of a disk and create a disk in the system with the same content >> >> I am taking a similar approach to the one Juan described. I am creating a >> VM and then creating a new disk with the same size and attributes as my disk >> image. Then I am replacing the disk image of the new disk with the file that >> contains the image of the disk I want. That seems to work but seemed too >> hacky/clumsy. I was hoping there is a more straightforward/clean way to do >> this. > > you can just place the disk on the storage, register the disk, and attach it > to a VM? > >> >> -----Original Message----- >> From: Juan Hernandez [mailto:[email protected]] >> Sent: Saturday, January 18, 2014 8:27 AM >> To: Satya Vempati; [email protected] >> Cc: Itamar Heim >> Subject: Re: [Users] Register a disk image via oVirt REST api >> >> On 01/17/2014 11:28 PM, Itamar Heim wrote: >>> On 01/16/2014 07:21 PM, Satya Vempati wrote: >>>> I have a disk image (i.e. a file) that I want to register as a disk >>>> using the REST API. >>>> >>>> The REST API works with existing disks, but does the API work with >>>> disk images? >>> >>> can you pleas explain what do you mean by an image compared to a disk? >>> >> >> I think that what you want is to take a file that you have that contains the >> image of a disk and create a disk in the system with the same content. >> >> As far as I know we don't have any direct way to do this. You will need to >> create an empty disk in oVirt, and then attach it to a virtual machine. Once >> it is attached to that virtual machine then you can write to it, but always >> via the virtual machine. For example, you can use the API as follows to >> create a new disk that isn't attached to any VM: >> >> curl \ >> -k \ >> -X POST \ >> -H "Accept: application/xml" \ >> -H "Content-Type: application/xml" \ >> -d " >> <disk> >> <name>newdisk</name> >> <size>1073741824</size> >> <format>raw</format> >> <interface>virtio</interface> >> </disk> >> " \ >> -u admin@internal:****** \ >> https://rhel.example.com/api/storagedomains/the_id_of_the_storage_dom >> a >> in/disks >> >> Then prepare a VM that you will use to copy the contents of your file to the >> new disk, and use the API to attach the new disk to this VM (you can >> preserve this VM, and use multiple times for this purpose): >> >> curl \ >> -k \ >> -X POST \ >> -H "Accept: application/xml" \ >> -H "Content-Type: application/xml" \ >> -d " >> <disk id='the_id_of_the_disk'/> >> " \ >> -u admin@internal:****** \ >> https://rhel.example.com/api/vms/the_id_of_the_vm/disks >> >> (Note that in order to attach the disk you have to provide the disk >> id returned by the API when you created it.) >> >> Then activate the disk, so that the VM can see it: >> >> curl \ >> -k \ >> -X POST \ >> -H "Accept: application/xml" \ >> -H "Content-Type: application/xml" \ >> -d " >> <action/> >> " \ >> -u admin@internal:****** \ >> https://rhel.example.com/api/vms/the_id_of_the_vm/disks/the_id_of_the >> _ >> disk/activate >> >> Now you will have to copy the contents of the file to the disk via the VM. >> For example, assuming that you have SSH enabled on that VM and that the disk >> device inside the VM is /dev/vdb (it won't allways be this, depends on the >> number and order of attached disks) you can do something like this: >> >> ssh root@myvm 'cat > /dev/vdb' < myfile.img ssh root@myvm 'sync' >> >> Once the contents of the file have been copied you can deactivate the disk >> and detach it from this intermediate VM, and maybe attach it to another one. >> >> Take into account that all these operations are lengthy ones, specially the >> operation to create the disk, and that the RESTAPI will usually return once >> the operation is initiated, so you will need to wait till they are finished. >> For example, when creating the disk you should poll the state of the VM till >> it is "ok". >> >> -- >> Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, planta 3ºD, >> 28016 Madrid, Spain Inscrita en el Reg. Mercantil de Madrid - C.I.F. >> B82657941 - Red Hat S.L. >> > _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
