[ovirt-devel] Failure in log collector on master: Failure fetching information about hypervisors from API. Error (ValueError): legacy is not a valid RngSource

Tue Sep 6 08:34:02 UTC 2016

On 09/05/2016 08:43 PM, Rafael Martins wrote:
> ----- Original Message -----
>> From: "Juan Hernández" <jhernand at redhat.com>
>> To: "Yaniv Kaul" <ykaul at redhat.com>
>> Cc: "Sandro Bonazzola" <sbonazzo at redhat.com>, "Rafael Martins" <rmartins at redhat.com>, "Ondra Machacek"
>> <omachace at redhat.com>, "devel" <devel at ovirt.org>
>> Sent: Friday, September 2, 2016 2:31:42 PM
>> Subject: Re: [ovirt-devel] Failure in log collector on master: Failure fetching information about hypervisors from
>> API. Error (ValueError): legacy is not a valid RngSource
>>
>> On 09/02/2016 02:24 PM, Yaniv Kaul wrote:
>>> On Fri, Sep 2, 2016 at 3:14 PM, Juan Hernández <jhernand at redhat.com
>>> <mailto:jhernand at redhat.com>> wrote:
>>>
>>>     On 09/02/2016 02:00 PM, Sandro Bonazzola wrote:
>>>     >
>>>     >
>>>     > On Fri, Sep 2, 2016 at 1:38 PM, Yaniv Kaul <ykaul at redhat.com
>>>     > <mailto:ykaul at redhat.com>
>>>     > <mailto:ykaul at redhat.com <mailto:ykaul at redhat.com>>> wrote:
>>>     >
>>>     >     Log:
>>>     >
>>>     >     2016-09-02 07:26:52::ERROR::hypervisors::197::root:: Failure
>>>     >     fetching information about hypervisors from API.
>>>     >     Error (ValueError): legacy is not a valid RngSource
>>>     >     2016-09-02 07:26:52::ERROR::__main__::1147::root::
>>>     >     _get_hypervisors_from_api: legacy is not a valid RngSource
>>>     >     2016-09-02 07:26:52::INFO::__main__::1424::root:: Gathering oVirt
>>>     >     Engine information...
>>>     >     2016-09-02 07:27:03::INFO::__main__::1398::root:: Gathering
>>>     >     PostgreSQL the oVirt Engine database and log files from
>>>     >     localhost...
>>>     >     2016-09-02 07:27:05::INFO::__main__::1859::root:: No hypervisors
>>>     >     were selected, therefore no hypervisor data will be collected.
>>>     >     2016-09-02 07:27:08::INFO::__main__::1862::root:: Log files have
>>>     >     been collected and placed in
>>>     >     /tmp/sosreport-LogCollector-20160902072705.tar.xz.
>>>     >
>>>     >
>>>     >     I am not familiar with this error - first time I've seen it,
>>>     >     while
>>>     >     running on Master, on Lago (with a patch I'm working on - that
>>>     >     adds
>>>     >     DNS and IPv6 support to Lago, nothing more - doesn't seem
>>>     >     relevant).
>>>     >     Any idea?
>>>     >
>>>     >
>>>     >
>>>     > Probably a change in the API.
>>>     > Rafael can you reproduce?
>>>     >
>>>     > Juan, Ondra, any insight?
>>>     >
>>>
>>>     That means that the API is returning "legacy" as the value for
>>>     something
>>>     that is declared of type "RngSource", and the valid values for that are
>>>     "random" and "hwrng". But the API can't return that, at least not
>>>     version 4 of the API. Are you using engine 4? Can you share the output
>>>     of the clusters resource?
>>>
>>>       https://.../ovirt-engine/api/clusters
>>>
>>>
>>> Lago is still using the v3 API.
>>> I'm not sure what the log collector is using. I assume[1] it's v4.
>>>
>>> Y.
>>> [1]
>>> https://github.com/oVirt/ovirt-log-collector/blob/dfaf35675bee3da1c53b4fd74b816efafa13d070/src/helper/hypervisors.py#L8
>>>
>>
>> But the version of the engine should be 4, if I understand correctly,
>> and SDK 4 should work correctly with that version of the engine. In
>> addition, if it the engine is version 3 the SDK connection should have
>> failed much earlier, during authentication.
> 
> Hi Juan,
> 
> I managed to reproduce this with "basic_suite_master" test from ovirt-system-tests, that uses everything from master branch. This means that engine version is 4, not 3. It seems to be an issue with engine/sdk, as the value is actually stored on engine as "legacy". Here you can find the xml output of the endpoints you asked: https://gist.github.com/rafaelmartins/60c21e158a9e6453c14a673f77693d61
> 
> Please let me know if you need anything else.
> 
> Thanks,
> Rafael
> 

This is a bug in the Python SDK. Should be fixed by the following patch:

  Fix reading of lists of elements
  https://gerrit.ovirt.org/63385

> 
>>>
>>>
>>>     >
>>>     >
>>>     >
>>>     >
>>>     >     Y.
>>>     >
>>>     >
>>>     >
>>>     >
>>>     > --
>>>     > Sandro Bonazzola
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>>>     <https://www.redhat.com/it/about/events/red-hat-open-source-day-2016>>
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>>>     >
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>>
>>
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