systemctl stop atomic-openshift-master-api does not do graceful shutdown leading to service outage

Solution In Progress - Updated -

Issue

  • When we stop (or restart) the master-api service, it takes up to 20 seconds until the master gets removed in the 'kubernetes' endpoint. Thus the DNS queries from all containers were going to the "stopped" master-api for 20 seconds, which resulted in a lot of errors on my check tool.

Environment

  • Red Hat OpenShift Container Platform 3.3 and 3.4
  • Red Hat OpenShift Container Platform 3.11

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