Merge pull request #104642 from openshift-cherrypick-robot/cherry-pick-102957-to-enterprise-4.21

[enterprise-4.21] OSDOCS 17428 4.21 Remove swap feature from docs

modules/nodes-cluster-enabling-features-about.adoc

@@ -85,7 +85,6 @@ The following Technology Preview features are enabled by this feature set:
 ** `NewOLMOwnSingleNamespace`
 ** `NewOLMPreflightPermissionChecks`
 ** `NewOLMWebhookProviderOpenshiftServiceCA`
-** `NodeSwap`
 ** `NoRegistryClusterOperations`
 ** `NutanixMultiSubnets`
 ** `OpenShiftPodSecurityAdmission`

modules/nodes-nodes-swap-memory.adoc

@@ -1,84 +0,0 @@
-// Module included in the following assemblies:
-//
-// * nodes/nodes/nodes-nodes-managing.adoc
-
-:_mod-docs-content-type: PROCEDURE
-[id="nodes-nodes-swap-memory_{context}"]
-= Allowing swap memory use on nodes
-
-[role="_abstract"] 
-You can allow workloads on the cluster nodes to use swap memory.
-
-:FeatureName: Swap memory support on nodes
-include::snippets/technology-preview.adoc[]
-
-[NOTE]
-====
-Swap memory support is available only for container-native virtualization (CNV) users or use cases.
-====
-
-To allow swap memory usage on your nodes, create a `kubeletconfig` custom resource (CR) to set the `failSwapOn` parameter to `false`. 
-
-Optionally, you can control swap memory usage by {product-title} workloads on those nodes by setting the `swapBehavior` parameter to one of the following values:
-
-* `NoSwap` prevents {product-title} worloads from using swap memory.  
-* `LimitedSwap` allows {product-title} workloads that fall under the Burstable QoS class to use swap memory.
-
-Regardless of the `swapBehavior` setting, any workloads that are not managed by {product-title} on that node can still use swap memory if the `failSwapOn` parameter is `false`.
-
-Because the kubelet will not start in the presence of swap memory without this configuration, you must allow swap memory in {product-title} before enabling swap memory on the nodes. If there is no swap memory present on a node, enabling swap memory in {product-title} has no effect.
-
-[WARNING]
-====
-Using swap memory can negatively impact workload performance and out-of-resource handling. Do not enable swap memory on control plane nodes.
-====
-
-.Prerequisites
-
-* You have a running {product-title} cluster that uses version 4.10 or later.
-* Your cluster is configured to use cgroup v2. Swap memory is not supported on nodes in clusters that use cgroup v1.
-* You are logged in to the cluster as a user with administrative privileges.
-* You have enabled the `TechPreviewNoUpgrade` feature set on the cluster (see _Nodes -> Working with clusters -> Enabling features using feature gates_).
-+
-[NOTE]
-====
-Enabling the `TechPreviewNoUpgrade` feature set cannot be undone and prevents minor version updates. These feature sets are not recommended on production clusters.
-====
-
-.Procedure
-
-. Apply a custom label to the machine config pool where you want to allow swap memory.
-+
-[source,terminal]
-----
-$ oc label machineconfigpool worker kubelet-swap=enabled
-----
-
-. Create a custom resource (CR) to enable and configure swap settings.
-+
-[source,yaml]
-----
-apiVersion: machineconfiguration.openshift.io/v1
-kind: KubeletConfig
-metadata:
-  name: swap-config
-spec:
-  machineConfigPoolSelector:
-    matchLabels:
-      kubelet-swap: enabled
-  kubeletConfig:
-    failSwapOn: false
-    memorySwap:
-      swapBehavior: LimitedSwap
-#...
-----
-+
-where:
-+
-`failSwapOn`:: Set to `false` to enable swap memory use on the associated nodes. Set to `true` to disable swap memory use.
-`swapBehavior`:: Optional: Specify the swap memory behavior for {product-title} pods.
-+
-* `NoSwap`: {product-title} pods cannot use swap. This is the default.
-* `LimitedSwap`: {product-title} pods of Burstable QoS class only are permitted to employ swap.
-
-. Enable swap memory on the nodes by setting the `swapaccount=1` kernel argument and configure swap memory as needed.

nodes/clusters/nodes-cluster-enabling-features.adoc

@@ -25,8 +25,6 @@ include::modules/nodes-cluster-enabling-features-cli.adoc[leveloffset=+1]
 
 * xref:../../storage/container_storage_interface/ephemeral-storage-csi-inline.adoc#ephemeral-storage-csi-inline[CSI inline ephemeral volumes]
 
-* xref:../../nodes/nodes/nodes-nodes-managing.adoc#nodes-nodes-swap-memory_nodes-nodes-managing[Swap memory on nodes]
-
 * xref:../../machine_management/cluster_api_machine_management/cluster-api-about.adoc#cluster-api-about[Managing machines with the Cluster API]
 
 * xref:../../support/remote_health_monitoring/using-insights-operator.adoc#disabling-insights-operator-gather_using-insights-operator[Disabling the {insights-operator} gather operations]

nodes/nodes/nodes-nodes-managing.adoc

@@ -28,8 +28,6 @@ include::modules/nodes-nodes-rtkernel-arguments.adoc[leveloffset=+1]
 
 endif::openshift-webscale[]
 
-include::modules/nodes-nodes-swap-memory.adoc[leveloffset=+1]
-
 include::modules/nodes-nodes-parallel-container-pulls-about.adoc[leveloffset=+1]
 
 include::modules/nodes-nodes-parallel-container-pulls-configure.adoc[leveloffset=+2]