Merge pull request #47721 from alishaIBM/411_upi_install

OCP 4.11 - installation doc updates from IBM P

Author: stevsmit

modules/installation-user-infra-generate-k8s-manifest-ignition.adoc

@@ -131,7 +131,7 @@ ifdef::ibm-power[]
 [NOTE]
 ====
 The installation program that generates the manifest and Ignition files is architecture specific and can be obtained from the
-link:https://mirror.openshift.com/pub/openshift-v4/ppc64le/clients/ocp/latest/[client image mirror]. The Linux version of the installation program runs on ppc64le only. This installer program is also available as a Mac OS version.
+link:https://mirror.openshift.com/pub/openshift-v4/ppc64le/clients/ocp/latest/[client image mirror]. The Linux version of the installation program (without an architecture postfix) runs on ppc64le only. This installer program is also available as a Mac OS version.
 ====
 endif::ibm-power[]
 
@@ -208,7 +208,7 @@ If you are installing a three-node cluster, skip the following step to allow the
 +
 [IMPORTANT]
 ====
-When you configure control plane nodes from the default unschedulable to schedulable, additional subscriptions are required. This is because control plane nodes then become worker nodes.
+When you configure control plane nodes from the default unschedulable to schedulable, additional subscriptions are required. This is because control plane nodes then become compute nodes.
 ====
 endif::baremetal,baremetal-restricted,ibm-z,ibm-power[]
 

modules/installation-user-infra-machines-iso.adoc

@@ -64,7 +64,9 @@ Replace `bootstrap.ign` with `master.ign` or `worker.ign` in the command to vali
 +
 . Although it is possible to obtain the {op-system} images that are required for your preferred method of installing operating system instances from the
 ifdef::openshift-enterprise[]
+ifndef::ibm-power[]
 link:https://mirror.openshift.com/pub/openshift-v4/x86_64/dependencies/rhcos/[{op-system} image mirror]
+endif::ibm-power[]
 endif::openshift-enterprise[]
 ifdef::openshift-origin[]
 link:https://getfedora.org/en/coreos/download?tab=metal_virtualized&stream=stable[{op-system}]

modules/installation-user-infra-machines-pxe.adoc

@@ -79,7 +79,9 @@ that the Ignition config files for the control plane and compute nodes are also
 . Although it is possible to obtain the {op-system} `kernel`, `initramfs` and `rootfs`
 files that are required for your preferred method of installing operating system instances from the
 ifdef::openshift-enterprise[]
+ifndef::ibm-power[]
 link:https://mirror.openshift.com/pub/openshift-v4/x86_64/dependencies/rhcos/[{op-system} image mirror]
+endif::ibm-power[]
 endif::openshift-enterprise[]
 ifdef::openshift-origin[]
 link:https://getfedora.org/en/coreos/download?tab=metal_virtualized&stream=stable[{op-system}]