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Doc update for MySQL 8.4 support (#629)
* Doc update for MySQL 8.4 support * added steps to update authentication method to caching_sha2_password * fix alignment * some text improvements * fix alignments * changes * move mysql upgrade details to mysql.rst
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‎source/releasenotes/compat.rst‎

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~~~~~~~~~~~~~~~~~~~~~
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- Java JRE 17
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- MySQL 8.0 (or equivalent compatible DBMS)
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- MySQL 8.4 (or equivalent compatible DBMS)
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Supported Hypervisor Versions
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-----------------------------

‎source/upgrading/upgrade/mysql.rst‎

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specific language governing permissions and limitations
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under the License.
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MySQL upgrade
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=============
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Explicit JDBC driver declaration
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--------------------------------
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While upgrading, on some environments the following may be required to be
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added in CloudStack's db.properties file:
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# Add these to your db.properties file
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db.cloud.driver=jdbc:mysql
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db.usage.driver=jdbc:mysql
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MySQL support updated to 8.4
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----------------------------
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As of Apache CloudStack 4.20.3, support for MySQL 8.4 has been added.
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Existing deployments upgraded to version 4.20.3 can still continue using MySQL 8.0
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without any changes.
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If you are running MySQL 8.0 and would like to upgrade to MySQL 8.4,
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you may follow the standard MySQL upgrade process to migrate safely to version 8.4,
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and then update the authentication method for the root and CloudStack (cloud) users with
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caching_sha2_password plugin using the below steps as the mysql_native_password plugin
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is deprecated as of MySQL 8.0.34, and disabled by default in MySQL 8.4. For more details,
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refer to MySQL documentation here: https://dev.mysql.com/doc/refman/8.4/en/caching-sha2-pluggable-authentication.html
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#. Stop MySQL server if already running
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.. code-block:: bash
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sudo systemctl stop mysqld
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#. Start MySQL server in safe mode without auth
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.. code-block:: bash
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sudo mysqld --skip-grant-tables --skip-networking &
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#. Login to MySQL without password
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.. code-block:: bash
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mysql -u root
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#. Reset passwords for root and CloudStack (cloud) users.
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.. code-block:: mysql
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ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'ROOT_PASSWORD';
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ALTER USER 'root'@'%' IDENTIFIED WITH caching_sha2_password BY 'ROOT_PASSWORD';
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ALTER USER 'cloud'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'CLOUD_PASSWORD';
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ALTER USER 'cloud'@'%' IDENTIFIED WITH caching_sha2_password BY 'CLOUD_PASSWORD';
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FLUSH PRIVILEGES;
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Note: Please ensure that the password used for the cloud database user matches the value
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configured in /etc/cloudstack/management/db.properties. If the password in db.properties
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is encrypted, you can retrieve it using the below command.
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.. code-block:: bash
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java -classpath /usr/share/cloudstack-common/lib/cloudstack-utils.jar \
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com.cloud.utils.crypt.EncryptionCLI -d \
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-i "$(grep -oP 'db.cloud.password=ENC\(\K[^\)]+(?=\))' /etc/cloudstack/management/db.properties)" \
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-p "$(cat /etc/cloudstack/management/key)"
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#. Remove deprecated authentication plugin 'mysql_native_password' from the MySQL configuration. Either comment or remove the below line from /etc/my.cnf
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.. parsed-literal::
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default_authentication_plugin=mysql_native_password
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#. Restart MySQL server
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.. code-block:: bash
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killall mysqld
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systemctl start mysqld
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MySQL 8.0+ sql mode change
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--------------------------
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MySQL mode (sql_mode) has changed in CloudStack db.properties to
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"STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,
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ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION".
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This gets automatically applies to the MySQL session used by CloudStack management server.
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If the admin uses MySQL directly and wants to query tables it is advised to change the sql_mode in the corresponding session or globally.
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Eg. mysql> set global sql_mode="STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,
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"> ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION";
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Query OK, 0 rows affected (0.00 sec)
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mysql> set sql_mode="STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,
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"> ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION";
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Query OK, 0 rows affected (0.00 sec)
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MySQL upgrade problems
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======================
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----------------------
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With certain MySQL versions (see below), issues have been seen with "cloud.nics" table's
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column type (which was not updated properly during CloudStack upgrades, due to MySQL limitations),

‎source/upgrading/upgrade/upgrade_notes.rst‎

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32bit versions of System VM Templates are in the process of being deprecated. Upgrade instructions from this Release Notes use 64bit Templates.
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Explicit JDBC driver declaration
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--------------------------------
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While upgrading, on some environments the following may be required to be
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added in CloudStack's db.properties file:
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# Add these to your db.properties file
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db.cloud.driver=jdbc:mysql
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db.usage.driver=jdbc:mysql
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MySQL 8.0 sql mode change
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-------------------------
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MySQL mode (sql_mode) has changed in CloudStack db.properties to
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"STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,
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ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION".
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This gets automatically applies to the MySQL session used by CloudStack management server.
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If the admin uses MySQL directly and wants to query tables it is advised to change the sql_mode in the corresponding session or globally.
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Eg. mysql> set global sql_mode="STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,
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"> ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION";
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Query OK, 0 rows affected (0.00 sec)
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mysql> set sql_mode="STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,
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"> ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION";
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Query OK, 0 rows affected (0.00 sec)
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.. include:: mysql.rst

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