Build are failing and nodes returns "no serving certificate available for the kubelet" in OCP 3

Solution Verified - Updated -


  • Red Hat OpenShift Container Platform (OCP)
    • 3.11
    • 3.1


  • Failing builds
  • Multiple OpenShift client commands (oc logs and oc rsh) are failing with:
 'Error from server: Get remote error: tls: internal error
  • OpenShift node logs show repeating error:
atomic-openshift-node[7122]: I0228 20:08:05.039291    7122 logs.go:49] http: TLS handshake error from no serving certificate available for the kubelet
  • Unable to handle requests
$ for i in `oc get nodes -o jsonpath=$'{range .items[*]}{}\n{end}'`; do oc get --raw /api/v1/nodes/$i/proxy/healthz; echo -e "\t$i"; done
Error from server (ServiceUnavailable): the server is currently unable to handle the request


In case of errors as Error from server (ServiceUnavailable): the server is currently unable to handle the request

  • Make sure that there are no certificates pending approval with command $ oc get csr | head.

    • If yes, approve them and the nodes should be back communicate to each other again:

      $ oc adm certificate approve

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Can you please let me know if there are any workarounds? Whats the ETA for the fix?

How do you approve the certificats?

for i in $(oc get csr | head | grep -i pending | awk '{ print $1 }'); do oc adm certificate approve $i; done