[openstack-dev] [oslo] Removing Nova specifics from oslo.log

Sean Dague sean at dague.net
Mon Apr 11 14:16:23 UTC 2016

On 04/11/2016 10:08 AM, Ed Leafe wrote:
> On 04/11/2016 08:38 AM, Julien Danjou wrote:
>> There's a lot of assumption in oslo.log about Nova, such as talking
>> about "instance" and "context" in a lot of the code by default. There's
>> even a dependency on oslo.context. >.<
>> That's being an issue for projects not being Nova, where we end up
>> having configuration options talking about "instances" and with default
>> values referring to that.
>> I'm at least taking that as being a serious UX issue for telemetry
>> projects.
>> I'd love to sanitize that library a bit. So, is this an option, or would
>> I be better off starting something new?
> The nova team spent a lot of time in Mitaka starting to clean up the
> config options that were scattered all over the codebase, and improve
> the help text for each of them so that you didn't need to grep the
> source code to find out what they did.
> I could see a similar effort for oslo.log (and maybe other oslo
> projects), and I would be happy to help out.

This isn't so much about scattered options, oslo.log options are all in
one place already, it's about the application specific ones that are

I agree that "instance" being embedded all the way back to oslo.log is
weird. Ideally we'd have something like "resource" that if specified
would be the primary resource the request was acting on. Or could even
just build some custom loggers Nova side to inject the instance when we
have it.

I'm not sure why oslo.context is an issue though. That's mostly about
putting in the common information about the identity of the requester
into the stream.


Sean Dague

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