External api is complaining i/o timeout when deploying OCP IPI on Azure existing VNET in RHOCP 4.x

Solution Verified - Updated -


  • During OCP installation on Azure via IPI installer in existing vnet, external api is unreachable and giving i/o timeout causing bootstrap to never finished.
level=debug msg=Still waiting for the Kubernetes API: Get "https://api.<CLUSTERDOMAIN>:6443/version?timeout=32s": dial tcp 10.x.x.x:6443: i/o timeout
  • Cluster deployment is partially successful in existing vnet via IPI


  • Red Hat OpenShift Container Platform (RHOCP) 4.6+
  • Red Hat OpenShift Container Platform on Microsoft Azure

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