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The new framework does indeed support user-defined monitors.  You just extend whatever monitor’d like (e.g., nova.compute.monitors.cpu.virt_driver.Monitor) and add your customized logic.  And since the new framework uses stevedore-based extension points, you just need to be sure to add the appropriate entry to your project’s setup.py file (or entry_points.txt in your egg) so that stevedore can load them properly.

Hope this helps!

Thanks,
Joe
> On Sep 10, 2015, at 2:52 AM, Hou Gang HG Liu <liuhoug at cn.ibm.com> wrote:
> 
> Hi all, 
> 
> I notice nova compute monitor now only tries to load monitors with namespace "nova.compute.monitors.cpu", and only one monitor in one namespace can be enabled( 
> https://review.openstack.org/#/c/209499/6/nova/compute/monitors/__init__.py <https://review.openstack.org/#/c/209499/6/nova/compute/monitors/__init__.py>). 
> 
> Is there a plan to make MonitorHandler.NAMESPACES configurable or just hard code constraint as it is now? And how to make compute monitor support user defined as it was? 
> 
> Thanks! 
> B.R 
> 
> Hougang Liu （刘侯刚） 
> Developer - IBM Platform Resource Scheduler                                                                                            <Mail Attachment.gif> 
> Systems and Technology Group 
> 
> Mobile: 86-13519121974 | Phone: 86-29-68797023 | Tie-Line: 87023                                       陕西省西安市高新六路42号中清大厦3层
> E-mail: liuhoug at cn.ibm.com                                                                                                 Xian, Shaanxi Province 710075, China
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