Hi Tim, Does anyone have any proposals regarding > > > - Possible replacements for Ceilometer that you have used instead > > It seems that many sites have written their own systems. >
Sorry - I should have appended this at the end of my last post. I need to preface this with "I have never used Ceilometer nor do our environments require billing". But we're already collecting a lot of information that could be used for billing. The `nova usage-list` command reports a tenant's compute resource allocation per 24 hour period. For per-instance metrics, I've posted a script that will collect them here: https://github.com/osops/tools-generic/blob/master/libvirt/instance_metrics.rb I recently discovered that the `nova diagnostics` command reports almost the same information, minus the CPU usage that I'm polling via `ps`. This might not be needed for most environments, though, and so `nova diagnostics` alone should be fine. So between all of this information, we're able to create a good picture of a tenant's compute usage. Of course, if we were to do billing, this would all need fed into a billing system of some sort. Plus, the 24 hour resolution might be too large. But hopefully it gives a good indication that polling some basic metrics of compute usage doesn't require a lot of resources. :)
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