fix: update details about fuse for OpenShift 4.15 (#2694)

Signed-off-by: dkwon17 <dakwon@redhat.com>

Author: dkwon17

modules/administration-guide/pages/configuring-fuse.adoc

@@ -16,6 +16,11 @@ For more efficient image management, use the fuse-overlayfs storage driver which
 
 To use fuse-overlayfs, you must make `/dev/fuse` accessible to workspace containers first.
 
+[NOTE]
+====
+This procedure is not necessary for OpenShift versions 4.15 and later, since the `/dev/fuse` device is available by default. See link:https://docs.openshift.com/container-platform/4.15/release_notes/ocp-4-15-release-notes.html#ocp-4-15-nodes-dev-fuse[Release Notes].
+====
+
 [WARNING]
 ====
 Creating `MachineConfig` resources on an OpenShift cluster is a potentially dangerous task, as you are making advanced, system-level changes to the cluster.

modules/end-user-guide/pages/accessing-fuse.adoc

@@ -11,19 +11,30 @@ You must have access to `/dev/fuse` to use fuse-overlayfs. This section describe
 
 .Prerequisites
 
-* The administrator has enabled access to `/dev/fuse` by following xref:administration-guide:configuring-fuse.adoc[].
+* For OpenShift versions older than 4.15, the administrator has enabled access to `/dev/fuse` by following xref:administration-guide:configuring-fuse.adoc[].
 * Determine a workspace to use fuse-overlayfs with.
 
 .Procedure
 
 . Use the `pod-overrides` attribute to add the required annotations defined in xref:administration-guide:configuring-fuse.adoc[] to the workspace. The `pod-overrides` attribute allows merging certain fields in the workspace pod's `spec`.
 +
+For OpenShift versions older than 4.15:
++
 [subs="+quotes,+attributes,+macros"]
 ----
 $ {orch-cli} patch devworkspace __<DevWorkspace_name>__ \
   --patch '{"spec":{"template":{"attributes":{"pod-overrides":{"metadata":{"annotations":{"io.kubernetes.cri-o.Devices":"/dev/fuse","io.openshift.podman-fuse":""}}}}}}}' \
   --type=merge
 ----
++
+For OpenShift version 4.15 and later:
++
+[subs="+quotes,+attributes,+macros"]
+----
+$ {orch-cli} patch devworkspace __<DevWorkspace_name>__ \
+  --patch '{"spec":{"template":{"attributes":{"pod-overrides":{"metadata":{"annotations":{"io.kubernetes.cri-o.Devices":"/dev/fuse"}}}}}}}' \
+  --type=merge
+----
 
 .Verification steps
 

modules/end-user-guide/pages/enabling-overlay-with-a-configmap.adoc

@@ -35,7 +35,7 @@ Otherwise, you can update the `/home/user/.config/containers/storage.conf` for a
 
 .Prerequisites
 
-* The administrator has enabled access to `/dev/fuse` by following xref:administration-guide:configuring-fuse.adoc[].
+* For OpenShift versions older than 4.15, the administrator has enabled access to `/dev/fuse` by following xref:administration-guide:configuring-fuse.adoc[].
 
 * A workspace with the required annotations are set by following xref:accessing-fuse.adoc[]
 

modules/end-user-guide/pages/using-the-fuse-overlay-storage-driver.adoc

@@ -17,7 +17,7 @@ For more efficient image management, use the fuse-overlayfs storage driver which
 
 You must meet the following requirements to fuse-overlayfs in a workspace:
 
-. The administrator has configured `/dev/fuse` access on the cluster by following xref:administration-guide:configuring-fuse.adoc[].
+. For OpenShift versions older than 4.15, the administrator has enabled `/dev/fuse` access on the cluster by following xref:administration-guide:configuring-fuse.adoc[].
 . The workspace has the necessary annotations for using the `/dev/fuse` device. See xref:accessing-fuse.adoc[].
 . The `storage.conf` file in the workspace container has been configured to use fuse-overlayfs. See xref:enabling-overlay-with-a-configmap.adoc[].