[openstack-dev] [all] [oslo] Suggestion to change verbose=false to true in oslo.log by default

Sean Dague sean at dague.net
Mon Jul 27 12:11:48 UTC 2015

Honestly, I think deprecating and removing 'verbose' is probably the
best option. INFO is probably the right default behavior, and it's not
really "verbose" in any real openstack usage. It is unlikely that anyone
would want that to be in the off state, and if so, they can do that via
python logging config.

On 07/27/2015 06:32 AM, Dmitry Tantsur wrote:
> Hi all!
> I didn't find the discussion on the ML so I feel like starting one.
> What was the reason of setting verbose to false by default? The patch
> [1] does not provide any reasoning for it.
> We all know that software does fail from time to time. While the default
> level of WARN might give some signal to an operator that *something* is
> wrong, it usually does not give much clues on *what* and *why*. Our logs
> guidelines define INFO as units of work, and the default means that
> operators/people debugging their logs won't even be able to track
> transitions in their system that lead to an error/warning.
> Of all people I know 100% are using DEBUG level by default, the only
> post I've found here on this topic [2] seems to state the same. I
> realize that DEBUG might give too much information to process (though I
> always request people to enable debugging log before sending my any bug
> reports). But is there really a compelling reason to disable INFO?
> Examples of INFO logs from ironic tempest run:
> ironic cond:
> http://logs.openstack.org/62/202562/7/check/gate-tempest-dsvm-ironic-pxe_ssh/090871b/logs/screen-ir-cond.txt.gz?level=INFO
> nova cpu:
> http://logs.openstack.org/62/202562/7/check/gate-tempest-dsvm-ironic-pxe_ssh/090871b/logs/screen-n-cpu.txt.gz?level=INFO
> and the biggest one neutron agt:
> http://logs.openstack.org/62/202562/7/check/gate-tempest-dsvm-ironic-pxe_ssh/090871b/logs/screen-q-agt.txt.gz?level=INFO
> As you can see, these logs are so small, you can just read through them
> without any tooling! Of course it's not a real world example, but I'm
> dealing with hundrer-of-megabytes debug-level text logs from nova +
> ironic nearly every day. It's still manangeable for me, grep handles it
> pretty well (to say nothing about journalctl).
> WDYT about changing this default on oslo.log level?
> Thanks,
> Dmitry
> [1] https://review.openstack.org/#/c/18110/
> [2]
> http://lists.openstack.org/pipermail/openstack-operators/2014-March/004156.html
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Sean Dague

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