title: How can I check cadvisor which is included in kubelet?
body: <p>I have multiple kubernetes clusters, whose versions are 1.13, 1.16, 1.19.</p>
  <p>I'm trying to monitor the total number of threads so that I need the metric &quot;container_threads&quot;.</p>
  <p>But for the cluster version equal or lower than 1.16, the container_threads metric looks like somewhat wrong.</p>
  <p>For 1.16, the metric values is always 0, for 1.13 no container_threads metrics exists.</p>
  <p>I know that the metric is from cadvisor which is included in kubelet.</p>
  <p>I want to make sure that from which version, the cadvisor doesn't have container_threads.</p>
  <p>I know how to check kubelet version &quot;kubelet --version&quot;.</p>
  <p>But I don't know how to find the version of cadvisor.</p>
  <p>Does anyone know about it?</p>
  <p>Thanks!</p>