Add a note for JAVA_OPTS if using Java 17 for ACS versions >= 4.20.0 (#544)

Author: Pearl1594

source/upgrading/index.rst

@@ -42,6 +42,7 @@ Contents:
 .. toctree::
    :maxdepth: 1
 
+   upgrade/upgrade_java_17_notes
    upgrade/mysql
    upgrade/valid_source
    upgrade/upgrade-4.20

source/upgrading/upgrade/upgrade_java_17_notes.rst

@@ -0,0 +1,43 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+   or more contributor license agreements.  See the NOTICE file
+   distributed with this work for additional information#
+   regarding copyright ownership.  The ASF licenses this file
+   to you under the Apache License, Version 2.0 (the
+   "License"); you may not use this file except in compliance
+   with the License.  You may obtain a copy of the License at
+   http://www.apache.org/licenses/LICENSE-2.0
+   Unless required by applicable law or agreed to in writing,
+   software distributed under the License is distributed on an
+   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+   KIND, either express or implied.  See the License for the
+   specific language governing permissions and limitations
+   under the License.
+
+.. CloudStack Release Notes documentation main file, created by
+   sphinx-quickstart on Fri Feb  7 16:00:59 2014.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+|menu_acs_logo|
+
+
+Upgrading CloudStack
+====================
+
+Java version upgraded to Java 17
+---------------------------------
+
+As of Apache CloudStack 4.20, support for running with Java 17 has been added.
+In later versions, support for Java 11 will be removed.
+
+If you are running CloudStack with Java 17, for CloudStack versions 4.20 and later:
+  * Verify /etc/default/cloudstack-management is consistent with https://github.com/apache/cloudstack/blob/main/packaging/systemd/cloudstack-management.default; Specifically, ensure that the following is present in the JAVA_OPTS:
+
+  .. code-block:: bash
+
+   --add-opens=java.base/java.lang=ALL-UNNAMED --add-exports=java.base/sun.security.x509=ALL-UNNAMED
+
+  * Verify /etc/default/cloudstack-usage is also consistent with the same file in the repository.
+  * Perform the same check for /etc/default/cloudstack-agent on the hypervisor hosts.
+
+.. include:: _java_version.rst

source/upgrading/upgrade/upgrade_notes.rst

@@ -23,6 +23,15 @@ Java version upgraded to Java 17
 As of Apache CloudStack 4.20, support for running with Java 17 has been added.
 In later versions, support for Java 11 will be removed.
 
+If you are running CloudStack with Java 17, for CloudStack versions 4.20 and later:
+  * Verify /etc/default/cloudstack-management is consistent with https://github.com/apache/cloudstack/blob/main/packaging/systemd/cloudstack-management.default; Specifically, ensure that the following is present in the JAVA_OPTS:
+
+  .. code-block:: bash
+
+   --add-opens=java.base/java.lang=ALL-UNNAMED --add-exports=java.base/sun.security.x509=ALL-UNNAMED
+
+  * Verify /etc/default/cloudstack-usage is also consistent with the same file in the repository.
+  * Perform the same check for /etc/default/cloudstack-agent on the hypervisor hosts.
 
 .. include:: _java_version.rst