[ovirt-users] Python-SDK4: How to list user permissions?

[Juan Hernández]

On 03/29/2017 01:05 PM, nicolas at devels.es wrote:
> Hi,
> 
> I'm trying to get a user's list of permissions, i.e., list all
> permissions a user have on VMs and VmPools.
> 
> In SDK3 that was easy as I could run (being 'u' a User object):
> 
> for perm in u.permissions.list():
>     vm = perm.get_vm()
>     vmpool = perm.get_vmpool()
> 
>     if vm or vmpool:
>         print "User has some permissions!"
> 
> In SDK4 I cannot reproduce the same logic. u.permissions returns an
> empty list ([]).
> 
> What I have so far is something like this:
> 
> for u in users_serv.list():
>      if u.user_name == 'admin at internal':
>          continue
> 
>      vms_service = sys_serv.vms_service()
>      for vm in vms_service.list():
>          vms = vms_service.vm_service(id=vm.id)
>          ps = vms.permissions_service()
>          for perm in ps.list():
>              perm_service = ps.permission_service(id=perm.id)
>              getperm = perm_service.get()
>              if getperm.user.user_name == u.user_name:
>                  print "Permission for %s" % (u.user_name)
>                  if getperm.vm:
>                      print "VM: %s" % (getperm.vm.id)
>                  if getperm.vm_pool:
>                      print "VmPool: %s" % (getperm.vm_pool.id)
> 
> However, this seems a bit overkill. We have nearly 850 VMs and for a
> single user this takes about 25 minutes to run. Additionally, it doesn't
> seem to return any permission, although I know this user has some
> permissions over 2 VMs (not sure where is it messed up).
> 
> I also tried using the system_service.permissions_service() but it seems
> to return only the global permissions.
> 
> Is there an easier way to do this?
> 
> Thanks!

Version 4 of the SDK makes a clear distinction between what are pure
containers of data (like the User class) and what are services (like the
UsersService class). Therefore when you call 'u.permissions' in version
4 of the SD you get nothing, because the object that you retrieved
previously doesn't contain the permissions, only a link. That is exactly
how the API behaves. When you do this:

  GET /ovirt-engine/api/users/{user:id}

You only get the data of the user, and some links to other related data,
like the permissions:

  <user id="..." href="...">
    <name>myuser</name>
    ...
    <link rel="permissions"
href="/ovirt-engine/api/users/{user:id}/permissions"/>
  </user>

In version 4 of the SDK the simple way to follow the link is to use the
Connection.follow_link method. So, you need something like this:

---8<---
# Find the user:
users_service = connection.system_service().users_service()
user = users_service.list(search='name=myuser')[0]

# Follow the link to the permissions of the user:
perms = connection.follow_link(user.permissions)
for perm in perms:
    if perm.vm or perm.vm_pool:
        print "User has some permissions!"
--->8---