[Bug 1274854] kubectl exec: handshake did not verify certificate chain

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1274854

--- Comment #2 from Jan Chaloupka  ---
The same happends with different pod:

# cat ubuntu.yaml
apiVersion: v1
kind: Pod
metadata:
  name: counter
spec:
  containers:
  - name: count
    image: ubuntu:14.04

# kubectl exec counter /bin/sh 
error: Unable to upgrade connection: {
  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {},
  "status": "Failure",
  "message": "tls: handshake did not verify certificate chain",
  "code": 500
}