There are wrong values with memory usage in kubernetes metricbeat module

Sergio_Ferreyra · November 2, 2021, 7:54pm

Hi team, Having an issue with the values of this metric. kubernetes.node.memory.usage.bytes
Looks like is not taking the proper values, for example:

I am using that metric to get the memory usage but is not the correct number, If I compare for example with kubectl command:

Do you have any idea if there is a bug using this field?

Regards!

Kaiyan_Sheng · November 10, 2021, 4:23am

Looks like all memory size and CPU total are the same for some reason. @ChrsMark Could you double check on this to see if it's a bug please? TIA!!

Sergio_Ferreyra · November 12, 2021, 2:50pm

Hey @Kaiyan_Sheng , yes looks like there is an issue reported in github but not sure if was fixed.

github.com/elastic/beats

Inconsistent reporting of kubernetes node memory-related metrics

opened 04:52PM - 19 Sep 18 UTC

closed 08:16PM - 17 Apr 21 UTC

walterdolce

docs Metricbeat Stalled needs_team

I was trying to display the memory available vs memory usage of a Kubernetes nod…e but then I noticed something strange. I am not sure whether it's metricsbeat that is at fault or not so I thought I would post it here. <img width="1810" alt="screen shot 2018-09-19 at 17 47 26" src="https://user-images.githubusercontent.com/6195629/45768238-406ce600-bc34-11e8-9376-6e61ccd697e7.png"> As you can see the `kubernetes.node.memory.usage.bytes` is higher than the `kubernetes.node.memory.allocatable.bytes`. How is that possible? The unit of measure configured within Grafana (`5.2.3`) is `bytes`. The version of metricbeat is `6.4.0`. The node is a Google Compute Engine instance of type `n1-standard-2 (2 vCPUs, 7.5 GB memory)`.

Regards!

Kaiyan_Sheng · November 23, 2021, 10:40pm

Thanks! What version of Metricbeat are you running?

Sergio_Ferreyra · November 24, 2021, 3:53am

Hi @Kaiyan_Sheng. We are using 7.12.1 version

system · December 22, 2021, 5:54am

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