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@gord, I have looked your link, seems related. 
  
 But still, image_ref is a problem.
  
  ------------------
 Luo Gangyi   luogangyi at cmss.chinamobile.com



  
  

 

 ------------------ Original ------------------
  From:  "gord chung";<gord at live.ca>;
 Date:  Mon, Dec 21, 2015 09:12 PM
 To:  "openstack-dev"<openstack-dev at lists.openstack.org>; 
 
 Subject:  Re: [openstack-dev] [Ceilometer][Gnocchi] inconsistent instanceattributes cause infinite update

 

we actually looked at this problem here: https://review.openstack.org/#/c/235702/

i think we should add support of new attribute instead.

 On 20/12/2015 10:52 AM, Luo Gangyi wrote:

  Hi devs,
  
 I found a problem which may cause infinite update of instance's attributes in gnocchi.
  
 Let's see the resource definition of instance.
  
   - resource_type: instance
    metrics:
      - 'instance'
      - 'memory'
      - 'memory.usage'
      - 'memory.resident'
      - 'vcpus'
      - 'cpu'
      - 'cpu_util'
      - 'disk.root.size'
 ...
     attributes:
      host: resource_metadata.host
      image_ref: resource_metadata.image_ref_url
 ...

 Here is the problem, although they have same  attributes, they are *not* same.
  
 Some of them came from nova's notifications and the others are came from ceilometer-compute-agent.
  
 1) Those came from notifications, their attributes looks like
  
 image_ref :http://10.133.12.125:9292/images/  
 host: compute.lgy-openstack-kilo.novalocal 
  
 2) Those came from ceilometer-compute-agent, 
 image_ref : http://10.133.12.125:8774/4994e42421a04beda56fff7d817e810e/images/8d6a9cd9-48ae-4a41-bd13-262a46c93d72 
 host:ea8f8e465d9caff06e80a0fda6f30d02725e0b55dc0fd940954cb55c
  
 Such difference will cause alternately and infinitely update of a instance's attributes if we enable nova audit.
  
 So I suggest we seperate these meters which came from notifications to another resource type like "instance_from_notification".
  
 Any other idea?
 
 
  ------------------
 Luo Gangyi   luogangyi at chinamobile.com



  

  
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--  gord
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