MachineConfigPool degraded: content mismatch for file "/etc/resolv.conf"

Issue

• One or more MachineConfigPools (MCP) are degraded:

  $ oc get mcp
  NAME     CONFIG                                         UPDATED   UPDATING   DEGRADED   MACHINECOUNT   READYMACHINECOUNT   UPDATEDMACHINECOUNT   DEGRADEDMACHINECOUNT   AGE
  master   rendered-master-xxxxxxx      False     True       True       3              1                   1                     1                      10h
  worker   rendered-worker-xxxxxxx      False     True       True       4              1                   1                     3                      10h
  

• Message in the degraded MachineConfigPool (MCP):

  Node node-01.example.com is reporting: "unexpected on-disk state validating against rendered-worker-xxxxxxx"
  

• machine-config-daemon pod shows error:

  E0101 00:00:00.000000    2239 daemon.go:1412] content mismatch for file /etc/resolv.conf (-want +got):
      bytes.Join({
  [...]
  E0101 00:00:00.000000    2239 writer.go:135] Marking Degraded due to: unexpected on-disk state validating against rendered-worker-xxxxxxx
  [...]