guest os updates

Author: DaanHoogland

source/releasenotes/about.rst

@@ -53,3 +53,31 @@ new features. Some of the highlights include:
 
 The full list of new features can be found in the project release notes at
 https://docs.cloudstack.apache.org/en/4.18.0.0/releasenotes/changes.html
+
+.. _guestosids
+
+Possible Issue with Guest OS IDs
+================================
+
+It has been noticed during upgrade testing that some environment, where
+ custom guest OSses where added and mapping for those OSses where added,
+ problems may occur during upgrade. Part of the mitigation is to make sure
+ OSses that are newly mapped but should have already been in the guest_os
+ table are there. Make sure you apply thois before you start the new 4.18
+ management server.
+
+first check which you miss:
+
+.. parsed-literal::
+
+  SELECT * FROM cloud.guest_os WHERE display_name IN (´CentOS 8´, ´Debian GNU/Linux 10 (32-bit)´, ´Debian GNU/Linux 10 (64-bit)´, ´SUSE Linux Enterprise Server 15 (64-bit)´, ´Windows Server 2019 (64-bit)´)
+
+Then apply any of the following lines that you might need.
+
+.. parsed-literal::
+
+  INSERT INTO cloud.guest_os (uuid, category_id, display_name, created, is_user_defined) VALUES (UUID(), '1', 'CentOS 8', now(), '0');
+  INSERT INTO cloud.guest_os (uuid, category_id, display_name, created, is_user_defined) VALUES (UUID(), '2', 'Debian GNU/Linux 10 (32-bit)', now(), '0');
+  INSERT INTO cloud.guest_os (uuid, category_id, display_name, created, is_user_defined) VALUES (UUID(), '2', 'Debian GNU/Linux 10 (64-bit)', now(), '0');
+  INSERT INTO cloud.guest_os (uuid, category_id, display_name, created, is_user_defined) VALUES (UUID(), '5', 'SUSE Linux Enterprise Server 15 (64-bit)', now(), '0');
+  INSERT INTO cloud.guest_os (uuid, category_id, display_name, created, is_user_defined) VALUES (UUID(), '6', 'Windows Server 2019 (64-bit)', now(), '0');

source/releasenotes/compat.rst

@@ -123,9 +123,11 @@ The following hypervisors are no longer be supported in this release due to vend
 The following Management Server Operating Systems are no longer supported in this release due to vendor EOL:
 
 -  CentOS 6.x
--  CentOS 8.x
+-  CentOS 8.x [1]_
 -  Ubuntu 14.04
 -  Ubuntu 16.04
 
+.. [1] in spite of of mostly being phased out some support is remaining in for now. See upgrading for details.
+
 Please see `CloudStack Wiki <https://cwiki.apache.org/confluence/display/CLOUDSTACK/Hypervisor+and+Management+Server+OS+EOL+Dates>`_
 for details.