Привет! 
Сегодня я расскажу о параметр группах AWS RDS. Как вы знаете, RDS предоставляет нам простую точку входа в БД. Ни к диску, ни в саму ОС и настройкам БД у нас нет доступа. Так же мы ограничены правами некоего суперпользователя, но это не root всё равно.
RDS Parameter Groups позволяют создать нужную конфигурацию вашей базы данных. Сегодня я на примере покажу как разрешить возможность создания хранимых процедур в RDS под MySQL. При создании сервера создаётся дефолтная параметр группа. В ней же можно и посмотреть список доступных параметров:
$ rds-describe-db-parameters default.mysql5.1
Вывод команды
DBPARAMETER allow-suspicious-udfs engine-default boolean static false
DBPARAMETER auto_increment_increment engine-default integer dynamic true
DBPARAMETER auto_increment_offset engine-default integer dynamic true
DBPARAMETER automatic_sp_privileges engine-default boolean dynamic true
DBPARAMETER back_log engine-default integer static true
DBPARAMETER basedir /rdsdbbin/mysql system string static false
DBPARAMETER binlog_cache_size 32768 system integer dynamic true
DBPARAMETER binlog_format MIXED system string dynamic false
DBPARAMETER bulk_insert_buffer_size engine-default integer dynamic true
DBPARAMETER character-set-client-handshake engine-default boolean static true
DBPARAMETER character_set_client engine-default string dynamic true
DBPARAMETER character_set_connection engine-default string dynamic true
DBPARAMETER character_set_database engine-default string dynamic true
DBPARAMETER character_set_filesystem engine-default string dynamic true
DBPARAMETER character_set_results engine-default string dynamic true
DBPARAMETER character_set_server engine-default string dynamic true
DBPARAMETER collation_connection engine-default string dynamic true
DBPARAMETER collation_server engine-default string dynamic true
DBPARAMETER completion_type engine-default integer dynamic true
DBPARAMETER concurrent_insert engine-default integer dynamic true
DBPARAMETER connect_timeout engine-default integer dynamic true
DBPARAMETER datadir /rdsdbdata/db/ system string static false
DBPARAMETER default_storage_engine InnoDB system string dynamic false
DBPARAMETER default_time_zone engine-default string static false
DBPARAMETER default_week_format engine-default integer dynamic true
DBPARAMETER delay_key_write engine-default string dynamic true
DBPARAMETER delayed_insert_limit engine-default integer dynamic true
DBPARAMETER delayed_insert_timeout engine-default integer dynamic true
DBPARAMETER delayed_queue_size engine-default integer dynamic true
DBPARAMETER div_precision_increment engine-default integer dynamic true
DBPARAMETER event_scheduler engine-default string dynamic true
DBPARAMETER flush engine-default boolean dynamic false
DBPARAMETER flush_time engine-default integer dynamic true
DBPARAMETER ft_boolean_syntax engine-default string dynamic false
DBPARAMETER ft_max_word_len engine-default integer static true
DBPARAMETER ft_min_word_len engine-default integer static true
DBPARAMETER ft_query_expansion_limit engine-default integer static true
DBPARAMETER ft_stopword_file engine-default string static true
DBPARAMETER general_log engine-default boolean dynamic true
DBPARAMETER group_concat_max_len engine-default integer dynamic true
DBPARAMETER ignore_builtin_innodb 1 system boolean static false 5.1.49
DBPARAMETER init_connect engine-default string dynamic true
DBPARAMETER innodb_adaptive_flushing engine-default boolean dynamic true 5.1.49
DBPARAMETER innodb_adaptive_hash_index engine-default boolean static true
DBPARAMETER innodb_additional_mem_pool_size 2097152 system integer static true
DBPARAMETER innodb_autoextend_increment engine-default integer dynamic true
DBPARAMETER innodb_autoinc_lock_mode engine-default integer static true
DBPARAMETER innodb_buffer_pool_size {DBInstanceClassMemory*3/4} system integer static true
DBPARAMETER innodb_change_buffering engine-default string dynamic true 5.1.49
DBPARAMETER innodb_commit_concurrency engine-default integer static true
DBPARAMETER innodb_concurrency_tickets engine-default integer dynamic true
DBPARAMETER innodb_data_home_dir /rdsdbdata/db/innodb system string static false
DBPARAMETER innodb_file_format engine-default string dynamic true 5.1.49
DBPARAMETER innodb_file_per_table 1 system boolean static true
DBPARAMETER innodb_flush_log_at_trx_commit engine-default integer dynamic true
DBPARAMETER innodb_flush_method O_DIRECT system string static false
DBPARAMETER innodb_io_capacity engine-default integer dynamic true 5.1.49
DBPARAMETER innodb_lock_wait_timeout engine-default integer static true
DBPARAMETER innodb_locks_unsafe_for_binlog engine-default boolean static false
DBPARAMETER innodb_log_buffer_size 8388608 system integer static true
DBPARAMETER innodb_log_file_size 134217728 system integer static false
DBPARAMETER innodb_log_group_home_dir /rdsdbdata/log/innodb system string static false
DBPARAMETER innodb_max_dirty_pages_pct engine-default integer dynamic true
DBPARAMETER innodb_max_purge_lag engine-default integer dynamic true
DBPARAMETER innodb_old_blocks_pct engine-default integer dynamic true 5.1.49
DBPARAMETER innodb_old_blocks_time engine-default integer dynamic true 5.1.49
DBPARAMETER innodb_open_files engine-default integer static true
DBPARAMETER innodb_random_read_ahead engine-default boolean dynamic true 5.1.61
DBPARAMETER innodb_read_ahead_threshold engine-default integer dynamic true 5.1.49
DBPARAMETER innodb_read_io_threads engine-default integer static true 5.1.49
DBPARAMETER innodb_replication_delay engine-default integer dynamic true 5.1.49
DBPARAMETER innodb_rollback_on_timeout engine-default boolean static true
DBPARAMETER innodb_spin_wait_delay engine-default integer dynamic true 5.1.49
DBPARAMETER innodb_stats_on_metadata engine-default boolean static true
DBPARAMETER innodb_stats_sample_pages engine-default integer dynamic true 5.1.49
DBPARAMETER innodb_strict_mode engine-default boolean dynamic true 5.1.49
DBPARAMETER innodb_support_xa engine-default boolean dynamic true
DBPARAMETER innodb_sync_spin_loops engine-default integer dynamic true
DBPARAMETER innodb_table_locks engine-default boolean dynamic true
DBPARAMETER innodb_thread_concurrency engine-default integer dynamic true
DBPARAMETER innodb_thread_sleep_delay engine-default integer dynamic true
DBPARAMETER innodb_use_legacy_cardinality_algorithm engine-default boolean dynamic false
DBPARAMETER innodb_use_sys_malloc engine-default boolean static true 5.1.49
DBPARAMETER innodb_write_io_threads engine-default integer static true 5.1.49
DBPARAMETER interactive_timeout engine-default integer dynamic true
DBPARAMETER join_buffer_size engine-default integer dynamic true
DBPARAMETER keep_files_on_create engine-default boolean dynamic true
DBPARAMETER key_buffer_size 16777216 system integer dynamic true
DBPARAMETER key_cache_age_threshold engine-default integer dynamic true
DBPARAMETER key_cache_block_size engine-default integer dynamic true
DBPARAMETER key_cache_division_limit engine-default integer dynamic true
DBPARAMETER language /rdsdbbin/mysql/share/mysql/english/ system string static false
DBPARAMETER lc_time_names engine-default string dynamic true
DBPARAMETER local_infile 1 system boolean dynamic true
DBPARAMETER log-bin /rdsdbdata/log/binlog/mysql-bin-changelog system string static false
DBPARAMETER log_bin_trust_function_creators engine-default boolean dynamic true
DBPARAMETER log_error /rdsdbdata/log/error/mysql-error.log system string static false
DBPARAMETER log_output TABLE system string dynamic false
DBPARAMETER log_queries_not_using_indexes engine-default boolean dynamic true
DBPARAMETER log_slave_updates engine-default boolean static true
DBPARAMETER log_warnings engine-default integer dynamic true
DBPARAMETER long_query_time engine-default integer dynamic true
DBPARAMETER low_priority_updates engine-default boolean dynamic true
DBPARAMETER lower_case_table_names engine-default integer static true
DBPARAMETER max_allowed_packet engine-default integer dynamic true
DBPARAMETER max_binlog_cache_size engine-default integer dynamic true
DBPARAMETER max_binlog_size 134217728 system integer dynamic false
DBPARAMETER max_connect_errors engine-default integer dynamic true
DBPARAMETER max_connections {DBInstanceClassMemory/12582880} system integer dynamic true
DBPARAMETER max_delayed_threads engine-default integer dynamic true
DBPARAMETER max_error_count engine-default integer dynamic true
DBPARAMETER max_heap_table_size engine-default integer dynamic true
DBPARAMETER max_insert_delayed_threads engine-default integer dynamic true
DBPARAMETER max_join_size engine-default integer dynamic true
DBPARAMETER max_length_for_sort_data engine-default integer dynamic true
DBPARAMETER max_prepared_stmt_count engine-default integer dynamic true
DBPARAMETER max_seeks_for_key engine-default integer dynamic true
DBPARAMETER max_sort_length engine-default integer dynamic true
DBPARAMETER max_sp_recursion_depth engine-default integer dynamic true
DBPARAMETER max_tmp_tables engine-default integer dynamic true
DBPARAMETER max_user_connections engine-default integer dynamic true
DBPARAMETER max_write_lock_count engine-default integer dynamic true
DBPARAMETER min_examined_row_limit engine-default integer dynamic true
DBPARAMETER myisam_data_pointer_size engine-default integer dynamic true
DBPARAMETER myisam_max_sort_file_size engine-default integer dynamic true
DBPARAMETER myisam_sort_buffer_size engine-default integer dynamic true
DBPARAMETER myisam_stats_method engine-default string dynamic true
DBPARAMETER myisam_use_mmap engine-default boolean dynamic true
DBPARAMETER net_buffer_length engine-default integer dynamic true
DBPARAMETER net_read_timeout engine-default integer dynamic true
DBPARAMETER net_retry_count engine-default integer dynamic true
DBPARAMETER net_write_timeout engine-default integer dynamic true
DBPARAMETER old-style-user-limits engine-default boolean static true
DBPARAMETER old_passwords engine-default boolean dynamic true
DBPARAMETER optimizer_prune_level engine-default boolean dynamic true
DBPARAMETER optimizer_search_depth engine-default integer dynamic true
DBPARAMETER optimizer_switch engine-default string dynamic true
DBPARAMETER pid_file /rdsdbdata/log/mysql-{EndPointPort}.pid system string static false
DBPARAMETER plugin-load innodb=ha_innodb_plugin.so;innodb_trx=ha_innodb_plugin.so;innodb_locks=ha_innodb_plugin.so;innodb_lock_waits=ha_innodb_plugin.so;innodb_cmp=ha_innodb_plugin.so;innodb_cmp_reset=ha_innodb_plugin.so;innodb_cmpmem=ha_innodb_plugin.so;innodb_cmpmem_reset=ha_innodb_plugin.so system string static false 5.1.49
DBPARAMETER plugin_dir /rdsdbbin/mysql/lib/mysql/plugin system string static false
DBPARAMETER port {EndPointPort} system integer static false
DBPARAMETER preload_buffer_size engine-default integer dynamic true
DBPARAMETER profiling_history_size engine-default integer dynamic true
DBPARAMETER query_alloc_block_size engine-default integer dynamic true
DBPARAMETER query_cache_limit engine-default integer dynamic true
DBPARAMETER query_cache_min_res_unit engine-default integer dynamic true
DBPARAMETER query_cache_size engine-default integer dynamic true
DBPARAMETER query_cache_type engine-default integer static true
DBPARAMETER query_cache_wlock_invalidate engine-default boolean dynamic true
DBPARAMETER query_prealloc_size engine-default integer dynamic true
DBPARAMETER range_alloc_block_size engine-default integer dynamic true
DBPARAMETER read_buffer_size 262144 system integer dynamic true
DBPARAMETER read_only {TrueIfReplica} engine-default boolean dynamic true 5.1.50
DBPARAMETER read_rnd_buffer_size 524288 system integer dynamic true
DBPARAMETER relay-log /rdsdbdata/log/relaylog/relaylog system string static false 5.1.50
DBPARAMETER safe-user-create engine-default boolean static true
DBPARAMETER secure_auth engine-default boolean dynamic true
DBPARAMETER secure_file_priv /tmp system string static false
DBPARAMETER server_id {ServerId} system integer dynamic false 5.1.50
DBPARAMETER skip-character-set-client-handshake engine-default boolean static true
DBPARAMETER skip_external_locking engine-default boolean static false
DBPARAMETER skip_name_resolve engine-default boolean static true 5.1.57
DBPARAMETER skip_show_database engine-default boolean static false
DBPARAMETER slow_launch_time engine-default integer dynamic true
DBPARAMETER slow_query_log engine-default boolean dynamic true
DBPARAMETER socket /tmp/mysql.sock system string static false
DBPARAMETER sort_buffer_size engine-default integer dynamic true
DBPARAMETER sql_mode engine-default string dynamic true
DBPARAMETER sql_select_limit engine-default integer dynamic true
DBPARAMETER sync_binlog engine-default integer dynamic true
DBPARAMETER sync_frm engine-default boolean dynamic true
DBPARAMETER sysdate-is-now engine-default boolean static true
DBPARAMETER table_definition_cache engine-default integer dynamic true
DBPARAMETER table_open_cache engine-default integer dynamic true
DBPARAMETER temp-pool engine-default boolean static true
DBPARAMETER thread_cache_size engine-default integer dynamic true
DBPARAMETER thread_stack 196608 engine-default integer static true
DBPARAMETER timed_mutexes engine-default boolean dynamic true
DBPARAMETER tmp_table_size engine-default integer dynamic true
DBPARAMETER tmpdir /rdsdbdata/tmp system string static false
DBPARAMETER transaction_alloc_block_size engine-default integer dynamic true
DBPARAMETER transaction_prealloc_size engine-default integer dynamic true
DBPARAMETER tx_isolation engine-default string dynamic true
DBPARAMETER updatable_views_with_limit engine-default boolean dynamic true
DBPARAMETER wait_timeout engine-default integer dynamic true
Собственно говоря, по эти параметры можно менять, тем самым настраивая и подстраивая конфиг вашей БД.
Перейдём к примеру создания и конфигурирования параметр группы:
1. Создём параметр группу extended-mysql
$ rds-create-db-parameter-group extended-mysql -f mysql5.1 -d "allows to store functions"
2. Меняем параметр log_bin_trust_function_creators
$ rds-modify-db-parameter-group extended-mysql --parameters="name=log_bin_trust_function_creators, value=on, method=immediate”
Вот и всё. Эта параметр группа даст возможность создавать функции, которые будут храниться в RDS.
3. Внесём сервер в параметр группу
$ rds-modify-db-instance myrdsserver --db-parameter-group-name=extended-mysql
4. Перегрузим сервер, чтобы настройки применились
$ rds-reboot-db-instance myrdsserver
Используете ли вы параметр группы для RDS? С какими граблями сталкивались при работе с ними? Очень интересно услышать что-то из чужого опыта!
Автор: korjik
