Description of problem:
After etcd v3.3.15 was released a few major bugs were exposed and were patched through v3.3.17. The bump to etcd was part of kube 1.16.3 but as OpenShift is pinned to 1.16.2 these changes should be introduced by a dependency bump for etcd and bbolt.
- "etcd client does not parse IPv6 addresses correctly when members are joining"  fixed via 
- "kube-apiserver: failover on multi-member etcd cluster fails certificate check on DNS mismatch"  fixed via 
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Expected results: etcd client version is paired with etcd server
Verified with 4.3.0-0.nightly-2019-11-17-224250, etcdctl version updated to 3.3.17
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.