Updates to many roles, including main user role to allow setting an alternate home directory

db/mysql-percona/templates/etc_mysql_my.cnf.j2

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+#
+# The MySQL database server configuration file.
+#
+# For explanations see
+# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
+
+[client]
+port        = {{ mysql_port }}
+socket      = /var/run/mysqld/mysqld.sock
+
+[mysqld_safe]
+socket      = /var/run/mysqld/mysqld.sock
+nice        = 0
+open-files-limit = 16384
+
+[mysqld]
+# * Basic Settings
+user        = mysql
+pid-file    = /var/run/mysqld/mysqld.pid
+socket      = /var/run/mysqld/mysqld.sock
+port        = {{ mysql_port }}
+basedir     = /usr
+datadir     = {{ mysql_datadir }}
+tmpdir      = {{ mysql_tempdir }}
+{% if  mysql_version is version('8.0', '>=') and mysql_disable_log_bin|bool %}
+disable_log_bin
+{% endif %}
+{% if  mysql_version is version('5.7', '<') %}
+# language is for pre-5.5. In 5.5 it is an alias for lc_messages_dir.
+language = {{ mysql_language }}
+{% else %}
+lc_messages_dir = {{ mysql_language }}
+{% endif %}
+bind-address = {{ mysql_bind_address }}
+skip-external-locking
+{% if mysql_sql_mode is defined %}
+sql_mode={{ mysql_sql_mode }}
+{% endif %}
+{% if mysql_default_authentication_plugin is defined and mysql_version is version('5.7', '>=') %}
+default_authentication_plugin={{ mysql_default_authentication_plugin }}
+{% endif %}
+
+# * Fine Tuning
+key_buffer_size         = {{ mysql_key_buffer }}
+max_allowed_packet      = {{ mysql_max_allowed_packet }}
+thread_stack            = {{ mysql_thread_stack }}
+thread_cache_size       = {{ mysql_cache_size }}
+{% if  mysql_version is version('5.7', '<') %}
+myisam-recover          = {{ mysql_myisam_recover }}
+{% else %}
+myisam-recover-options  = {{ mysql_myisam_recover }}
+{% endif %}
+max_connections         = {{ mysql_max_connections }}
+table_open_cache        = {{ mysql_table_cache }}
+{% if  mysql_version is version('5.7', '<') %}
+thread_concurrency      = {{ mysql_thread_concurrency }}
+{% endif %}
+sort_buffer_size        = {{ mysql_sort_buffer_size }}
+
+# ** Query Cache Configuration, removed in MySQL >= 8.0
+{% if mysql_version_major|int < 8 %}
+query_cache_limit       = {{ mysql_query_cache_limit }}
+query_cache_size        = {{ mysql_query_cache_size }}
+{% endif %}
+
+# ** Logging and Replication
+log_error = /var/log/mysql/error.log
+{% if mysql_version_major|int < 8 %}
+log_warnings = 2
+{% else %}
+log_error_verbosity = 2
+{% endif %}
+#general_log_file        = /var/log/mysql/mysql.log
+#general_log             = 1
+#
+#log_slow_queries   = /var/log/mysql/mysql-slow.log
+#long_query_time = 2
+#log-queries-not-using-indexes
+#
+# The following can be used as easy to replay backup logs or for replication.
+#server-id      = 1
+#log_bin            = /var/log/mysql/mysql-bin.log
+expire_logs_days    = 10
+max_binlog_size     = 100M
+#binlog_do_db       = include_database_name
+#binlog_ignore_db   = include_database_name
+
+# ** InnoDB
+# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
+# Read the manual for more InnoDB related options. There are many!
+innodb_flush_log_at_trx_commit = {{ mysql_innodb_flush_log_at_trx_commit }}
+innodb_buffer_pool_size = {{ mysql_innodb_buffer_pool_size }}
+{% if mysql_innodb_flush_method != 'fdatasync': %}
+innodb_flush_method = {{ mysql_innodb_flush_method }}
+{% endif %}
+innodb_lock_wait_timeout = {{ mysql_innodb_lock_wait_timeout }}
+innodb_log_buffer_size = {{ mysql_innodb_log_buffer_size }}
+innodb_log_file_size = {{ mysql_innodb_log_file_size }}
+innodb_file_per_table = {{ mysql_innodb_file_per_table }}
+
+{% if mysql_optimizer_switch is defined %}
+# Check https://bugs.mysql.com/bug.php?id=69721 for more info
+optimizer_switch = {{ mysql_optimizer_switch }}
+{% endif %}
+
+# ** Security Features
+# Read the manual, too, if you want chroot!
+# chroot = /var/lib/mysql/
+
+character_set_server = {{ mysql_character_set_server }}
+collation_server = {{ mysql_collation_server }}
+character-set-client-handshake = {{ mysql_character_set_client_handshake }}
+
+[mysqldump]
+quick
+quote-names
+max_allowed_packet  = {{ mysql_mysqldump_max_allowed_packet }}
+
+[mysql]
+#no-auto-rehash # faster start of mysql but no tab completition
+
+[isamchk]
+key_buffer      = {{ mysql_isamchk_key_buffer }}
+
+#
+# * IMPORTANT: Additional settings that can override those from this file!
+#   The files must end with '.cnf', otherwise they'll be ignored.
+#
+!includedir /etc/mysql/conf.d/