OSDOCS-12786: 4/5 node support for ABI

Author: skopacz1

modules/etcd-node-scaling.adoc

@@ -6,7 +6,9 @@
 [id="etcd-node-scaling_{context}"]
 = Node scaling for etcd
 
-In general, clusters must have 3 control plane nodes. However, if your cluster is installed on a bare metal platform, you can scale a cluster up to 5 control plane nodes as a postinstallation task. For example, to scale from 3 to 4 control plane nodes after installation, you can add a host and install it as a control plane node. Then, the etcd Operator scales accordingly to account for the additional control plane node.
+In general, clusters must have 3 control plane nodes. However, if your cluster is installed on a bare metal platform, it can have up to 5 control plane nodes. If an existing bare-metal cluster has fewer than 5 control plane nodes, you can scale the cluster up as a postinstallation task.
+
+For example, to scale from 3 to 4 control plane nodes after installation, you can add a host and install it as a control plane node. Then, the etcd Operator scales accordingly to account for the additional control plane node.
 
 Scaling a cluster to 4 or 5 control plane nodes is available only on bare metal platforms.
 

modules/installation-configuration-parameters.adoc

@@ -629,7 +629,12 @@ endif::agent[]
 |controlPlane:
   replicas:
 |The number of control plane machines to provision.
+ifndef::agent[]
 |Supported values are `3`, or `1` when deploying {sno}.
+endif::agent[]
+ifdef::agent[]
+|Supported values are `3`, `4`, `5`, or `1` when deploying {sno}.
+endif::agent[]
 
 |credentialsMode:
 |The Cloud Credential Operator (CCO) mode. If no mode is specified, the CCO dynamically tries to determine the capabilities of the provided credentials, with a preference for mint mode on the platforms where multiple modes are supported.

modules/understanding-agent-install.adoc

@@ -57,10 +57,9 @@ Recommended cluster resources for the following topologies:
 |Topology|Number of control plane nodes|Number of compute nodes|vCPU|Memory|Storage
 |Single-node cluster|1|0|8 vCPUs|16 GB of RAM| 120 GB
 |Compact cluster|3|0 or 1|8 vCPUs|16 GB of RAM|120 GB
-|HA cluster|3|2 and above |8 vCPUs|16 GB of RAM|120 GB
+|HA cluster|3 to 5|2 and above |8 vCPUs|16 GB of RAM|120 GB
 |====
 
-
 In the `install-config.yaml`, specify the platform on which to perform the installation. The following platforms are supported:
 
 * `baremetal`