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OSDOCS#11576: Adding note to not use memory ballooning #80237

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Aug 14, 2024
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OSDOCS#11576: Adding note to not use memory ballooning #80237

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6 changes: 5 additions & 1 deletion modules/installation-minimum-resource-requirements.adoc
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Expand Up @@ -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:
Expand Down Expand Up @@ -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::[]
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18 changes: 18 additions & 0 deletions snippets/memory-ballooning.adoc
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@@ -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].
====