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Bug 1695920 - API script to list clusters fails with error 'ValueError: urandom is not a valid RngSource'
Summary: API script to list clusters fails with error 'ValueError: urandom is not a va...
Alias: None
Product: Red Hat Enterprise Virtualization Manager
Classification: Red Hat
Component: ovirt-engine-sdk-python
Version: 4.2.8
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: ---
Assignee: Ondra Machacek
QA Contact: meital avital
Depends On:
TreeView+ depends on / blocked
Reported: 2019-04-03 22:07 UTC by Abhishekh Patil
Modified: 2019-04-10 21:48 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2019-04-10 21:48:31 UTC
oVirt Team: Infra
Target Upstream Version:

Attachments (Terms of Use)

Description Abhishekh Patil 2019-04-03 22:07:37 UTC
Description of problem:
API script to list clusters fails with below error:
    clusters = clusters_service.list()
  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/", line 3819, in list
    return readers.ClusterReader.read_many(reader)
  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/", line 1787, in read_many
  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/", line 1740, in read_one
    obj.required_rng_sources = [types.RngSource(s.lower()) for s in Reader.read_strings(reader)]
  File "/usr/lib/python2.7/site-packages/enum/", line 330, in __call__
    return cls.__new__(cls, value)
  File "/usr/lib/python2.7/site-packages/enum/", line 642, in __new__
    raise ValueError("%s is not a valid %s" % (value, cls.__name__))
ValueError: urandom is not a valid RngSource

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Create a script as mentioned on RHV-Manager and execute it:
import ovirtsdk4 as sdk
import ovirtsdk4.types as types
import getpass

connection = sdk.Connection(
    password=getpass.getpass('Please enter user password: '),
system_service = connection.system_service()
clusters_service = system_service.clusters_service()

clusters = clusters_service.list()

for cl in clusters:
    print("%s (%s)" % (,


Actual results:
Script fails with error 'ValueError: urandom is not a valid RngSource'

Expected results:
Script should work.

Comment 4 Gordon Watson 2019-04-10 21:48:31 UTC
It turns out that 'python-ovirt-engine-sdk4-4.2.9-1.el7ev.x86_64' was not being used after all, and instead an older version was being used. When the Python SDK package was upgraded, the problem no longer occurred.

Closing as NOTABUG.

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