I have multiple kubernetes clusters, whose versions are 1.13, 1.16, 1.19.

I'm trying to monitor the total number of threads so that I need the metric "container\_threads".

But for the cluster version equal or lower than 1.16, the container\_threads metric looks like somewhat wrong.

For 1.16, the metric values is always 0, for 1.13 no container\_threads metrics exists.

I know that the metric is from cadvisor which is included in kubelet.

I want to make sure that from which version, the cadvisor doesn't have container\_threads.

I know how to check kubelet version "kubelet --version".

But I don't know how to find the version of cadvisor.

Does anyone know about it?

Thanks!