<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">Hi all, </div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default"><font face="verdana, sans-serif">I'm add ceilometer into my compute node, when I watch the ceilometer compute log , I found this error .</font><br><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters [-] Could not get disk.device.write.requests.rate events for 59277f16-6ccf-4b5a-9204-c75c8a97dff7: ['INTERNAL_ERROR', 'Rrd_interface.Internal_error("Rrd.Invalid_data_source(\\"vbd_xvda_read\\")")']: Failure: ['INTERNAL_ERROR', 'Rrd_interface.Internal_error("Rrd.Invalid_data_source(\\"vbd_xvda_read\\")")']<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters Traceback (most recent call last):<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/ceilometer/compute/pollsters/__init__.py", line 136, in get_samples<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters cache, instance, self._inspection_duration)<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/ceilometer/compute/pollsters/__init__.py", line 100, in _inspect_cached<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters result = list(result)<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/ceilometer/compute/virt/xenapi/inspector.py", line 176, in inspect_disk_rates<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters vm_ref, "vbd_%s_read" % vbd_rec['device']))<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/os_xenapi/client/objects.py", line 64, in <lambda><br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters return lambda *params: self._call_method(method_name, *params)<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/os_xenapi/client/objects.py", line 61, in _call_method<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters return self.session.call_xenapi(call, *args)<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/os_xenapi/client/session.py", line 200, in call_xenapi<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters return session.xenapi_request(method, args)<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/os_xenapi/client/XenAPI.py", line 130, in xenapi_request<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters result = _parse_result(getattr(self, methodname)(*full_params))<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters File "/usr/lib/python2.7/site-packages/os_xenapi/client/XenAPI.py", line 212, in _parse_result<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters raise Failure(result['ErrorDescription'])<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters Failure: ['INTERNAL_ERROR', 'Rrd_interface.Internal_error("Rrd.Invalid_data_source(\\"vbd_xvda_read\\")")']<br></font><font face="monospace, monospace">2017-09-08 20:21:59.214 14826 ERROR ceilometer.compute.pollsters</font></blockquote><div class="gmail_default"><br></div><div class="gmail_default">How to resolve this error ?<br><br>The second question, when I check gnocchi metric list, why most of metric have a none value in unit column ?</div><div class="gmail_default"><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><font face="monospace, monospace">...<br></font><font face="monospace, monospace">| 04df7669-0578-43b6-9e7f-d413e7def0e6 | low | memory.usage | MB | 59277f16-6ccf-4b5a-9204-c75c8a97dff7 |<br></font><font face="monospace, monospace">| 135bd162-fc03-4395-9e24-b4709c438808 | low | memory | MB | 59277f16-6ccf-4b5a-9204-c75c8a97dff7 |<br></font><font face="monospace, monospace">| 1bb63ed1-f1da-4300-9e86-2d6fb902ece6 | low | disk.read.requests | None | 59277f16-6ccf-4b5a-9204-c75c8a97dff7 |<br></font><font face="monospace, monospace">| 1c422d14-b254-46d8-b3b5-a78a5068592a | low | disk.read.requests.rate | None | 59277f16-6ccf-4b5a-9204-c75c8a97dff7 |<br></font><font face="monospace, monospace">| 1cbc7050-4359-4d55-a3f0-383782223c49 | low | disk.ephemeral.size | GB | 59277f16-6ccf-4b5a-9204-c75c8a97dff7 |<br></font><font face="monospace, monospace">| 237c02ae-0759-4ed6-8ec9-d25b06a398c0 | low | cpu | None | 59277f16-6ccf-4b5a-9204-c75c8a97dff7 |<br></font><font face="monospace, monospace">| 2cddcb76-bfa5-4c5b-b12a-2d3f0d270674 | low | cpu_util | % | 59277f16-6ccf-4b5a-9204-c75c8a97dff7 |<br></font><font face="monospace, monospace">...</font></blockquote><div class="gmail_default"><br>I truncate the result </div></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div 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