Re: [PATCH] avocado: use sha1 for fc31 imgs to avoid first time re-download

[Jan Richter <jarichte@redhat.com>]

On 11/10/22 00:26, Philippe Mathieu-Daudé wrote:
> On 9/11/22 16:39, Daniel Henrique Barboza wrote:
>> On 10/27/22 06:01, Daniel P. Berrangé wrote:
>>> On Thu, Oct 27, 2022 at 09:46:29AM +0200, Thomas Huth wrote:
>>>> On 24/10/2022 11.02, Daniel P. Berrangé wrote:
>>>>> On Sat, Oct 22, 2022 at 02:03:50PM -0300, Daniel Henrique Barboza 
>>>>> wrote:
>>>>>> 'make check-avocado' will download any images that aren't present 
>>>>>> in the
>>>>>> cache via 'get-vm-images' in tests/Makefile.include. The target that
>>>>>> downloads fedora 31 images, get-vm-image-fedora-31, will use 'avocado
>>>>>> vmimage get  --distro=fedora --distro-version=31 --arch=(...)' to
>>>>>> download the image for each arch. Note that this command does not
>>>>>> support any argument to set the hash algorithm used and, based on the
>>>>>> avocado source code [1], DEFAULT_HASH_ALGORITHM is set to "sha1". The
>>>>>> sha1 hash is stored in a 
>>>>>> Fedora-Cloud-Base-31-1.9.{ARCH}.qcow2-CHECKSUM
>>>>>> in the cache.
>>>>>
>>>>>> For now, in QEMU, let's use sha1 for all Fedora 31 images. This will
>>>>>> immediately spares us at least one extra download for each Fedora 31
>>>>>> image that we're doing in all our CI runs.
>>>>>>
>>>>>> [1] https://github.com/avocado-framework/avocado.git @ 942a5d6972906
>>>>>> [2] https://github.com/avocado-framework/avocado/issues/5496
>>>>>
>>>>> Can we just ask Avocado maintainers to fix this problem on their
>>>>> side to allow use of a modern hash alg as a priority item. We've
>>>>> already had this problem in QEMU for over a year AFAICT, so doesn't
>>>>> seem like we need to urgently do a workaround on QEMU side, so we
>>>>> can get Avocado devs to commit to fixing it in the next month.
>>>>
>>>> Do we have such a commitment? ... The avocado version in QEMU is 
>>>> completely
>>>> backlevel these days, it's still using version 88.1 from May 2021, i.e.
>>>> there hasn't been any update since more than a year. I recently 
>>>> tried to
>>>> bump it to a newer version on my own (since I'm still suffering from 
>>>> the
>>>> problem that find_free_port() does not work if you don't have a 
>>>> local IPv6
>>>> address), but it's not that straight forward since the recent 
>>>> versions of
>>>> avocado changed a lot of things (e.g. the new nrunner - do we want 
>>>> to run
>>>> tests in parallel? If so it breaks a lot of the timeout settings, I 
>>>> think),
>>>> so an update needs a lot of careful testing...

Hi Daniel,

if the problem of migrating avocado to latest version on qemu is only in 
parallel run, I would suggest to disable it with 
`nrunner.max_parallel_tasks` [1]. Even that the differences between 
avocado legacy runner and nrunner is huge, the migration should be 
straight forward. So if you have more issues with migration to the 
nrunner, I would be happy to help you with that.

[1] 
https://avocado-framework.readthedocs.io/en/latest/config/index.html#nrunner-max-parallel-tasks

- Jan

>>>
>>> That it is so difficult to update Avocado after barely more than
>>> 1 year is not exactly a strong vote of confidence in our continued
>>> use of Avocado long term :-(
>>
>>
>> By the way, Avocado just provided a fix for the problem this patch is 
>> trying
>> to amend:
>>
>> https://github.com/avocado-framework/avocado/pull/5515#issuecomment-1308872846
> 
> Thanks Jan!
> 
>> Is there an easy way to plug upstream Avocado into QEMU? I would like 
>> to test
>> tests/avocado/boot_linux.py:BootLinuxPPC64.test_pseries_tcg to see if 
>> the problem
>> is fixed by Avocado upstream.
> 
> See 
> https://lore.kernel.org/qemu-devel/20200403172919.24621-9-philmd@redhat.com/
> 
> For your case:
> 
> -- >8 --
> diff --git a/tests/requirements.txt b/tests/requirements.txt
> index 0ba561b6bd..e17bc3972c 100644
> --- a/tests/requirements.txt
> +++ b/tests/requirements.txt
> @@ -4,3 +4,3 @@
>   # Note that qemu.git/python/ is always implicitly installed.
> -avocado-framework==88.1
> +-e 
> git+https://github.com/avocado-framework/avocado.git@b31b868c882d4650d3b7d2fbfc9b8ac0f2c3672b#egg=avocado-framework
>   pycdlib==1.11.0
> ---
> 
> Regards,
> 
> Phil.
>