Setting Azure Cloud provider config causes nodes to loose access to cluster

Solution Verified - Updated -

Environment

  • OpenShift Container Platform 3.7

Issue

Nodes disappear from cluster when azure cloud provider config is enabled.

Sometimes immediate, sometimes it takes a while before node cannot join SDN.

Resolution

This is resolved with the following errata
https://access.redhat.com/errata/RHBA-2018:1576

Root Cause

Kubelet can't reach Azure API and marks not as not ready
Improvements being tracked in bz1573122

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