Open Stack

On 9/6/2019 6:59 PM, melanie witt wrote:
> 
> * If Telemetry is no longer using the server usage audit log API, we 
> deprecate it in Nova and notify deployment tools to stop setting 
> [DEFAULT]/instance_usage_audit = true to prevent further creation of 
> nova.task_log records and recommend manual cleanup by users

Deprecating the API would just be a signal to not develop new tools 
based on it since it's effectively unmaintained but that doesn't mean we 
can remove it since there could be non-Telemtry tools in the wild using 
it that we'd never hear about. You might not be suggesting an eventual 
path to removal of the API, I'm just bringing that part up since I'm 
sure people are thinking it.

I'm also assuming that API isn't multi-cell aware, meaning it won't 
traverse cells pulling records like listing servers or migration resources.

As for the config option to run the periodic task that creates these 
records, that's disabled by default so deployment tools shouldn't be 
enabling it by default - but maybe some do if they are configured to 
deploy ceilometer.

> 
> or
> 
> * If Telemetry is still using the server usage audit log API, we create 
> a new 'nova-manage db purge_task_log --before <date>' (or similar) 
> command that will hard delete nova.task_log records before a specified 
> date or all if --before is not specified

If you can't remove the API then this is probably something that needs 
to happen regardless, though we likely won't know if anyone uses it. I'd 
consider it pretty low priority given how extremely latent this is and 
would expect anyone that's been running with this enabled in production 
has developed DB purge scripts for this table long ago.

-- 

Thanks,

Matt