Open Stack

On Thu, Dec 19, 2013 at 03:47:30PM +0100, Vladik Romanovsky wrote:
> I think it was:
> 
> ceilometer sample-list -m cpu_util -q 'resource_id=vm_uuid'

Hmm, a standard devstack deployment of ceilometer doesn't seem to
record any performance stats at all - just shows me the static
configuration parameters :-(

 ceilometer meter-list  -q 'resource_id=296b22c6-2a4d-4a8d-a7cd-2d73339f9c70' 
+---------------------+-------+----------+--------------------------------------+----------------------------------+----------------------------------+
| Name                | Type  | Unit     | Resource ID                          | User ID                          | Project ID                       |
+---------------------+-------+----------+--------------------------------------+----------------------------------+----------------------------------+
| disk.ephemeral.size | gauge | GB       | 296b22c6-2a4d-4a8d-a7cd-2d73339f9c70 | 96f9a624a325473daf4cd7875be46009 | ec26984024c1438e8e2f93dc6a8c5ad0 |
| disk.root.size      | gauge | GB       | 296b22c6-2a4d-4a8d-a7cd-2d73339f9c70 | 96f9a624a325473daf4cd7875be46009 | ec26984024c1438e8e2f93dc6a8c5ad0 |
| instance            | gauge | instance | 296b22c6-2a4d-4a8d-a7cd-2d73339f9c70 | 96f9a624a325473daf4cd7875be46009 | ec26984024c1438e8e2f93dc6a8c5ad0 |
| instance:m1.small   | gauge | instance | 296b22c6-2a4d-4a8d-a7cd-2d73339f9c70 | 96f9a624a325473daf4cd7875be46009 | ec26984024c1438e8e2f93dc6a8c5ad0 |
| memory              | gauge | MB       | 296b22c6-2a4d-4a8d-a7cd-2d73339f9c70 | 96f9a624a325473daf4cd7875be46009 | ec26984024c1438e8e2f93dc6a8c5ad0 |
| vcpus               | gauge | vcpu     | 296b22c6-2a4d-4a8d-a7cd-2d73339f9c70 | 96f9a624a325473daf4cd7875be46009 | ec26984024c1438e8e2f93dc6a8c5ad0 |
+---------------------+-------+----------+--------------------------------------+----------------------------------+----------------------------------+


If the admin user can't rely on ceilometer guaranteeing availability of
the performance stats at all, then I think having an API in nova to report
them is in fact justifiable. In fact it is probably justifiable no matter
what as a fallback way to check that VMs are doing in the fact of failure
of ceilometer / part of the cloud infrastructure.

Daniel
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