Hi Dan, glad to meet you both on LOR and in this mailing list :)
Unfortunately ovirtsdk.infrastructure.brokers.<anything> classes instances miss
information about the higher objects very often. The typical situation is
returning of empty string when we ask something about the parent from the child
object ("child" and "parent" in terms Red Hat Enterprise Virtualization objects
hierarchy). Consider this Python code:
from ovirtsdk.api import API
from ovirtsdk.xml import params
...
api = API(...)
d = api.vms.list()[i].get_disks().list()[i]
# ovirtsdk.infrastructure.brokers.VMDisk class
instance, i – any number in range(api.vms.list().__len__())
s = d.get_storage_domains().get_storage_domain()[0]
# ovirtsdk.infrastructure.params.StorageDomain class instance
t = s.get_data_center()
# NoneType
So you can see that this approach does not work here.
Our purpose is checking the VM’s disk image integrity (I mean integrity of
system files, stored in /boot, /bin, /sbin, /lib etc.) every time the VM
starts. The integrity checking script is written in Python and relies on
libguestfs and vdsm hooks. Specific vdsm hook runs our script and block the
VM’s boot process until the correctness of the system files hash sums will be
checked. But libguestfs requires the full path to the disk to be handled, and
it’s not integrated with ovirt infrastructure. And here we face with a task of
full disk image filenames definition.
Thank you,
Vitaly Isaev
Software engineer
Information security department
Fintech JSC, Moscow, Russia
From: Dan Yasny [mailto:[email protected]]
Sent: Friday, December 06, 2013 8:56 PM
To: Исаев Виталий Анатольевич
Cc: [email protected]
Subject: Re: [Users] oVirt Python SDK: getting the full filenames of disk images
Probably not, but you can
- get the disk image UUID (that's the name in the filesystem or LV name),
- get the UUID of the storage domain (that will be the top level dir name or VG
name)
- get the DC UUID (this will be the top level dir name and the mount point for
LVM)
Then compose the path out of these. Keep in mind that the disk UUID you get is
the latest leaf in a snapshot tree, and if you need the entire chain of images,
you need to recursively traverse the tree starting at the leaf, using the PUUID
tag to find the parent.
Might be a better way, but I'm not aware of it.
Moreover, if you explain why you need to touch those images manually instead of
letting ovirt handle everything, we might be able to suggest a better way
--
D
On Wed, Dec 4, 2013 at 2:34 AM, Исаев Виталий Анатольевич
<[email protected]<mailto:[email protected]>> wrote:
Dear ovirt-engine users,
I will be appreciated if someone experienced in oVirt Python SDK could advice
the method of getting the full filename of the VM’s disk images in the RHEV
hypervisor’s file system. Can I get filename with a full file system path from
a ovirtsdk.infrastructure.brokers.VMDisk class instance?
If Python SDK (what is preffered) can’t provide such an information, may be it
is still possible with RHEV-M REST API?
Thank you,
Vitaly Isaev
Software engineer
Information security department
Fintech JSC, Moscow, Russia
_______________________________________________
Users mailing list
[email protected]<mailto:[email protected]>
http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
[email protected]
http://lists.ovirt.org/mailman/listinfo/users
