Merge pull request #80237 from bergerhoffer/OSDOCS-11576

OSDOCS#11576: Adding note to not use memory ballooning

Author: bergerhoffer

modules/installation-minimum-resource-requirements.adoc

@@ -47,7 +47,7 @@
 // * installing/installing-restricted-networks-azure-installer-provisioned.adoc
 // * installing/installing_azure/installing-restricted-networks-azure-user-provisioned.adoc
 // * installing/installing_vsphere/upi/upi-vsphere-installation-reqs.adoc
-// * installing/intalling_bare_metal_ipi/ipi-install-prerequisites.adoc
+// * installing/installing_bare_metal_ipi/ipi-install-prerequisites.adoc
 
 ifeval::["{context}" == "installing-azure-customizations"]
 :azure:
@@ -266,6 +266,10 @@ endif::azure[]
 
 If an instance type for your platform meets the minimum requirements for cluster machines, it is supported to use in {product-title}.
 
+ifdef::vsphere[]
+include::snippets/memory-ballooning.adoc[]
+endif::vsphere[]
+
 ifeval::["{context}" == "installing-azure-customizations"]
 :!azure:
 endif::[]

snippets/memory-ballooning.adoc

@@ -0,0 +1,18 @@
+// Text snippet included in the following modules:
+//
+// * modules/installation-minimum-resource-requirements.adoc
+
+:_mod-docs-content-type: SNIPPET
+
+[IMPORTANT]
+====
+Do not use memory ballooning in {product-title} clusters. Memory ballooning can cause cluster-wide instabilities, service degradation, or other undefined behaviors.
+
+* Control plane machines should have committed memory equal to or greater than the published minimum resource requirements for a cluster installation.
+
+* Compute machines should have a minimum reservation equal to or greater than the published minimum resource requirements for a cluster installation.
+
+These minimum CPU and memory requirements do not account for resources required by user workloads.
+
+For more information, see the Red Hat Knowledgebase article link:https://access.redhat.com/articles/7074533[Memory Ballooning and OpenShift].
+====