Work item: Improve output upon error. From the email thread:

>> 2- Missing error messages
>>
>> There were times when the refresh command didn't output any errors on
>> the terminal though it had failed.
>>
>> This happened for example when we run into the issue described in the
>> previous point, where exit code from the script would be 1 but there
>> would be no message printed on the screen.
>>
>> This lead support team to believe during the weekend session that the
>> command did run successfully, so they didn't understand why the proposed
>> steps in our document would not work.
> yep that was mentioned by melanie or gibi as well i think on monday that defently can be improved

When I heard this I thought maybe the output was being captured to a log
file instead of going to the console. But I googled again and found this:

https://stackoverflow.com/questions/55325145/python-not-printing-output

Maybe we just need to flush stdout before exiting nova-manage? I'm
surprised we never ran into this before though.

We need to understand what's going on here - whether it's a matter of just calling flush() like Melanie said, or do we need to add called to LOG.error in some places.


This bug was initially created as a copy of Bug #2161733

I am copying this bug because: 



Description of problem:

Gorka had to make heavy use of the `nova-manage volume_attachment` commands in resolving an escalation for Ericsson, and he had some feedback for us. We'd like to implement that feedback.

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

From master all the way down to 16.2.

How reproducible:

N/A

Steps to Reproduce:

N/A

Actual results:

N/A

Expected results:

N/A

Additional info:

The thread where Gorka explains his feedback is at [1]. I'll try to break it down into specific fixes/work items in subsequent comments in this BZ.

[1] https://lists.corp.redhat.com/archives/rhos-compute/2022-December/000883.html