OpenShift installation fails when machine CIDR is overlapping with reserved CIDR of docker bridge subnet.

Solution Verified - Updated -

Issue

  • Creation of manifest from install-config.yaml fails with below error when machine CIDR is overlapping with reserved CIDR of docker bridge subnet
FATAL failed to fetch Master Machines: failed to load asset "Install Config": invalid "install-config.yaml" file: networking.machineNetwork[0]: Invalid value: "172.10.x.x/25": overlaps with default Docker Bridge subnet (172.10.x.x/25)

Environment

  • Red Hat OpenShift Container Platform
    • 4.x

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