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docs: Add caveat for OpenShift #16161

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6 changes: 6 additions & 0 deletions Documentation/gettingstarted/k8s-install-openshift-okd.rst
Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,12 @@ you will need to make sure that Helm values used below reflect those changes. Na
should match ``clusterPoolIPv4PodCIDR`` and ``clusterPoolIPv4MaskSize``. Also make sure that the ``clusterNetwork``
does not conflict with ``machineNetwork`` (which represents the VPC CIDR in AWS).

.. warning::

Ensure that there are multiple replicas of the ``controlPlane``. A single
``controlPlane`` will lead to failure to bootstrap the cluster during
installation.

Next, generate OpenShift manifests:

.. code-block:: shell-session
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