Fix ups checks with Python ValueError exceptions

[sven-ruess]

General information

Checkmk 2.4.0p7 is used on Checkmk appliance 1.7.10.

ups check voltage in, ups voltage out and ups load out were not working and break down with exception ValueError.

Bug reports

If a ups device configured and a discovery is done, then those checks will report this exception.

Proposed changes

Take care about the value, which should be used for the check. In all cases a integer is return and check is working.

[sven-ruess]

This error https://github.com/Checkmk/checkmk/actions/runs/16622749658/job/47030993204?pr=837#step:7:347 is not related to my changes. Can you support? I do not know, what I can do, to solve it.

Thank you

[mo-ki]

Hi Sven!
Can you share the offending values with us? I'd rather handle this case explicitly, then silently skipping all unknown values and just not discovering anything.

[sven-ruess]

Hi Moritz,

I contacted the customer to provide me a snmpwalk. After I have received, I will forward it.

Further I can tell you, that the problem is, that some values have not value and are None. Conversion from None to int is not working. So I take care about, that all needed values will be int. If present, the current value, otherwise 0. Functions are working as expected.

[racicLuka]

Hello @sven-ruess,

Are there any news? Did the customer provide a walk?

Thank you!

[racicLuka]

Hey @sven-ruess,

Since there has not been new information on this topic, I will close the PR. If anything new comes up, feel free to reopen it.

Best,
Luka