Description:

As a OCP user, I would expect to receive an alert message if an action is required to keep my cluster healthy.

Performing node update in paused pool requires OCP cluster admin to manually decide and take action. Considering the high impact of kubelet CA being not updated, MCO will alert admin about unpausing the pool so that kubelet CA update can take place on time.

Acceptance Criteria:

• MCO sends alert message to take appropriate action when certificates have been rotated by the apiserver, but the new certificate bundle cannot be deployed to nodes due to the pool being paused.
• For debugging purpose, Node controller can also send event and logs message.