Add hint not to use NFS (#3608)

* add note about missing NFS support
Signed-off-by: Christian Stankowic <christian.stankowic@sva.de>
Co-authored-by: Karl Eichwalder <ke@suse.de>

CHANGELOG.md

@@ -1,3 +1,5 @@
+- Added admonition that NFS does not support SELinux labeling and should
+  not be used
 - Updated product migration in Client Configuration Guide: added SUSE
   Linux Enterprise Server to SUSE Linux Enterprise Server for SAP
   Applications and extensions enabled automatically

modules/installation-and-upgrade/pages/hardware-requirements.adoc

@@ -253,6 +253,11 @@ We recommend you use XFS as the filesystem type for all volumes.
 The size of the disk for repositories storage is dependent on the number of distributions and channels you intend to manage with {productname}.
 See the tables in this section for guides to estimate the size required.
 
+[IMPORTANT]
+====
+Do not use NFS for storage because it does not support SELinux file labeling.
+====
+
 On the {productname} Server, use this command to find all available storage devices:
 
 ----

modules/installation-and-upgrade/pages/uyuni-install-requirements.adoc

@@ -6,6 +6,10 @@ endif::[]
 
 The following tables specify the minimum server and proxy requirements.
 
+[IMPORTANT]
+====
+Do not use NFS for storage because it does not support SELinux file labeling.
+====
 
 // In this table, replace ``version`` with the version of the product you are using.
 == Server Requirements