1、相关基础
MySQL 5.7.6之后GTID_MODE提供了两个新的选项分别为ON_PERMISSIVE和OFF_PERMISSIVE
OFF_PERMISSIVE:不产生GTID事务, Slave接受不带GTID的事务(匿名事务)也接受带GTID的事务
ON_PERMISSIVE:新事务为gtid事务,slave接受GTID事务也接受不带GTID事务
GTID_MODE在主备库上的兼容情况如下:
gtid_next参数设置在匿名模式和GTID模式下的兼容情况:
2、在线开启GTID模式操作步骤
2.1、主要操作
----1、检查数据库中是否有不支持gtid的操作 --设置ENFORCE_GTID_CONSISTENCY = WARN,运行一段时间,最好包含一天负载最高的时间段,有条件建议观察2~3天,检查日志是否有告警产生 SET @@GLOBAL.ENFORCE_GTID_CONSISTENCY = WARN; ----2、如果步骤一没有告警产生,设置ENFORCE_GTID_CONSISTENCY为ON SET @@GLOBAL.ENFORCE_GTID_CONSISTENCY = ON; ----3、设置GTID_MODE = OFF_PERMISSIVE SET @@GLOBAL.GTID_MODE = OFF_PERMISSIVE; ----4、设置GTID_MODE = OFF_PERMISSIVE SET @@GLOBAL.GTID_MODE = ON_PERMISSIVE; ----5、确保在线的匿名事物数为0,设置GTID_MODE=ON SHOW STATUS LIKE 'ONGOING_ANONYMOUS_TRANSACTION_COUNT'; SET @@GLOBAL.GTID_MODE = ON; ----6、重启slave,设置为GTID模式 STOP SLAVE [FOR CHANNEL 'channel']; CHANGE MASTER TO MASTER_AUTO_POSITION = 1 [FOR CHANNEL 'channel']; START SLAVE [FOR CHANNEL 'channel']; ----7、将gtid参数配置到参数文件中 ENFORCE_GTID_CONSISTENCY = ON GTID_MODE=ON
2.2、实验,在上述每个阶段均产生一个事物验证gtid的产生
主库操作日志
mysql> SET @@GLOBAL.ENFORCE_GTID_CONSISTENCY = WARN; Query OK, 0 rows affected (0.00 sec) mysql> SET @@GLOBAL.ENFORCE_GTID_CONSISTENCY = ON; Query OK, 0 rows affected (0.00 sec) mysql> mysql> mysql> insert into test(name) value('yong1'); Query OK, 1 row affected (0.01 sec) mysql> commit; Query OK, 0 rows affected (0.00 sec) mysql> SET @@GLOBAL.GTID_MODE = OFF_PERMISSIVE; Query OK, 0 rows affected (0.00 sec) mysql> insert into test(name) value('yong2'); Query OK, 1 row affected (0.00 sec) mysql> commit; Query OK, 0 rows affected (0.00 sec) mysql> SET @@GLOBAL.GTID_MODE = ON_PERMISSIVE; Query OK, 0 rows affected (0.01 sec) mysql> insert into test(name) value('yong3'); Query OK, 1 row affected (0.01 sec) mysql> commit; Query OK, 0 rows affected (0.00 sec) mysql> SHOW STATUS LIKE 'ONGOING_ANONYMOUS_TRANSACTION_COUNT'; +-------------------------------------+-------+ | Variable_name | Value | +-------------------------------------+-------+ | Ongoing_anonymous_transaction_count | 0 | +-------------------------------------+-------+ 1 row in set (0.01 sec) mysql> mysql> SET @@GLOBAL.GTID_MODE = ON; Query OK, 0 rows affected (0.05 sec) mysql> insert into test(name) value('yong4'); Query OK, 1 row affected (0.01 sec) mysql> commit; Query OK, 0 rows affected (0.00 sec)
备库操作日志
mysql> SET @@GLOBAL.ENFORCE_GTID_CONSISTENCY = WARN; Query OK, 0 rows affected (0.00 sec) mysql> SET @@GLOBAL.ENFORCE_GTID_CONSISTENCY = ON; Query OK, 0 rows affected (0.00 sec) mysql> SET @@GLOBAL.GTID_MODE = OFF_PERMISSIVE; Query OK, 0 rows affected (0.01 sec) mysql> SET @@GLOBAL.GTID_MODE = ON_PERMISSIVE; Query OK, 0 rows affected (0.01 sec) mysql> SHOW STATUS LIKE 'ONGOING_ANONYMOUS_TRANSACTION_COUNT'; +-------------------------------------+-------+ | Variable_name | Value | +-------------------------------------+-------+ | Ongoing_anonymous_transaction_count | 0 | +-------------------------------------+-------+ 1 row in set (0.00 sec) mysql> SET @@GLOBAL.GTID_MODE = ON; Query OK, 0 rows affected (0.06 sec) mysql> select * from test; +----+-------+ | id | name | +----+-------+ | 1 | yong | | 2 | yong1 | | 3 | yong2 | | 4 | yong3 | | 5 | yong4 | +----+-------+ 5 rows in set (0.00 sec) mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.10 Master_User: repl Master_Port: 3706 Connect_Retry: 60 Master_Log_File: binlog.000008 Read_Master_Log_Pos: 520 Relay_Log_File: relay.000002 Relay_Log_Pos: 687 Relay_Master_Log_File: binlog.000008 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 520 Relay_Log_Space: 924 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 103706 Master_UUID: 6a8c58b0-51a7-11e8-8d8c-000c29991327 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: 6a8c58b0-51a7-11e8-8d8c-000c29991327:2 Executed_Gtid_Set: 6a8c58b0-51a7-11e8-8d8c-000c29991327:1-2 Auto_Position: 1 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 1 row in set (0.00 sec)
binlog解析
##########################################第一个insert语句 SET TIMESTAMP=1525674136/*!*/; BEGIN /*!*/; # at 847 #180507 14:22:16 server id 103706 end_log_pos 908 CRC32 0x39db9e80 Rows_query # insert into test(name) value('yong1') # at 908 #180507 14:22:16 server id 103706 end_log_pos 958 CRC32 0x0043983a Table_map: `yong`.`test` mapped to number 108 # at 958 #180507 14:22:16 server id 103706 end_log_pos 1005 CRC32 0x751f37c9 Write_rows: table id 108 flags: STMT_END_F ### INSERT INTO `yong`.`test` ### SET ### @1=2 /* INT meta=0 nullable=0 is_null=0 */ ### @2='yong1' /* VARSTRING(400) meta=400 nullable=0 is_null=0 */ # at 1005 #180507 14:22:16 server id 103706 end_log_pos 1036 CRC32 0xcd38a654 Xid = 46 COMMIT/*!*/; ##########################################第二个insert语句 BEGIN /*!*/; # at 291 #180507 14:23:00 server id 103706 end_log_pos 352 CRC32 0xfccbcdd6 Rows_query # insert into test(name) value('yong2') # at 352 #180507 14:23:00 server id 103706 end_log_pos 402 CRC32 0x320fc42f Table_map: `yong`.`test` mapped to number 108 # at 402 #180507 14:23:00 server id 103706 end_log_pos 449 CRC32 0x3e671945 Write_rows: table id 108 flags: STMT_END_F ### INSERT INTO `yong`.`test` ### SET ### @1=3 /* INT meta=0 nullable=0 is_null=0 */ ### @2='yong2' /* VARSTRING(400) meta=400 nullable=0 is_null=0 */ # at 449 #180507 14:23:00 server id 103706 end_log_pos 480 CRC32 0x0fc37aa9 Xid = 49 COMMIT/*!*/; ##########################################第三条insert语句产生gtid # at 480 #180507 14:23:10 server id 103706 end_log_pos 524 CRC32 0x02d4d256 Rotate to binlog.000007 pos: 4 SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/; DELIMITER ; # End of log file /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; # at 4 #180507 14:23:10 server id 103706 end_log_pos 123 CRC32 0xf9248b17 Start: binlog v 4, server v 5.7.22-log created 180507 14:23:10 # at 123 #180507 14:23:10 server id 103706 end_log_pos 154 CRC32 0x2f87c3f1 Previous-GTIDs # [empty] # at 154 #180507 14:23:23 server id 103706 end_log_pos 219 CRC32 0x58b85659 GTID last_committed=0 sequence_number=1 rbr_only=yes /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/; SET @@SESSION.GTID_NEXT= '6a8c58b0-51a7-11e8-8d8c-000c29991327:1'/*!*/; # at 219 #180507 14:23:23 server id 103706 end_log_pos 291 CRC32 0x67b3e766 Query thread_id=5 exec_time=0 error_code=0 SET TIMESTAMP=1525674203/*!*/; SET @@session.pseudo_thread_id=5/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; SET @@session.sql_mode=1436549120/*!*/; SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; /*!\C utf8 *//*!*/; SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=45/*!*/; SET @@session.lc_time_names=0/*!*/; SET @@session.collation_database=DEFAULT/*!*/; BEGIN /*!*/; # at 291 #180507 14:23:23 server id 103706 end_log_pos 352 CRC32 0x22d72bfc Rows_query # insert into test(name) value('yong3') # at 352 #180507 14:23:23 server id 103706 end_log_pos 402 CRC32 0x4ff170b9 Table_map: `yong`.`test` mapped to number 108 # at 402 #180507 14:23:23 server id 103706 end_log_pos 449 CRC32 0x91443ddd Write_rows: table id 108 flags: STMT_END_F ### INSERT INTO `yong`.`test` ### SET ### @1=4 /* INT meta=0 nullable=0 is_null=0 */ ### @2='yong3' /* VARSTRING(400) meta=400 nullable=0 is_null=0 */ # at 449 #180507 14:23:23 server id 103706 end_log_pos 480 CRC32 0x09004f94 Xid = 52 COMMIT/*!*/; ########################################第四条insert语句 # at 480 #180507 14:23:59 server id 103706 end_log_pos 524 CRC32 0xfb775fc3 Rotate to binlog.000008 pos: 4 SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/; DELIMITER ; # End of log file /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; # at 4 #180507 14:23:59 server id 103706 end_log_pos 123 CRC32 0x5fab71ad Start: binlog v 4, server v 5.7.22-log created 180507 14:23:59 # Warning: this binlog is either in use or was not closed properly. # at 123 #180507 14:23:59 server id 103706 end_log_pos 194 CRC32 0x830a108d Previous-GTIDs # 6a8c58b0-51a7-11e8-8d8c-000c29991327:1 # at 194 #180507 14:25:26 server id 103706 end_log_pos 259 CRC32 0xa1ab9f47 GTID last_committed=0 sequence_number=1 rbr_only=yes /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/; SET @@SESSION.GTID_NEXT= '6a8c58b0-51a7-11e8-8d8c-000c29991327:2'/*!*/; # at 259 #180507 14:25:26 server id 103706 end_log_pos 331 CRC32 0xa40bc261 Query thread_id=5 exec_time=0 error_code=0 SET TIMESTAMP=1525674326/*!*/; SET @@session.pseudo_thread_id=5/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; SET @@session.sql_mode=1436549120/*!*/; SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; /*!\C utf8 *//*!*/; SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=45/*!*/; SET @@session.lc_time_names=0/*!*/; SET @@session.collation_database=DEFAULT/*!*/; BEGIN /*!*/; # at 331 #180507 14:25:26 server id 103706 end_log_pos 392 CRC32 0xedd9b134 Rows_query # insert into test(name) value('yong4') # at 392 #180507 14:25:26 server id 103706 end_log_pos 442 CRC32 0xaa9eefab Table_map: `yong`.`test` mapped to number 108 # at 442 #180507 14:25:26 server id 103706 end_log_pos 489 CRC32 0x3384c16f Write_rows: table id 108 flags: STMT_END_F ### INSERT INTO `yong`.`test` ### SET ### @1=5 /* INT meta=0 nullable=0 is_null=0 */ ### @2='yong4' /* VARSTRING(400) meta=400 nullable=0 is_null=0 */ # at 489 #180507 14:25:26 server id 103706 end_log_pos 520 CRC32 0x566695c2 Xid = 66 COMMIT/*!*/; SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/; DELIMITER ; # End of log file /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
3、在线关闭GTID模式操作步骤
----1、关闭复制,找到复制呃位置,切换到传统模式 stop slave; change master to master_host='172.172.178.75',master_port=3306,master_user='repl',master_password='root',master_log_file='3306-bin.000056',master_log_pos=897553222,MASTER_AUTO_POSITION = 0; --以从库的Relay_Master_Log_File和Exec_Master_Log_Pos 作为MASTER_LOG_FILE和MASTER_LOG_POS 来指定复制开始位置。 --必须要指定MASTER_AUTO_POSITION = 0,否则会有如下报错: start slave; ----2、主备依次设置GTID_MODE为ON_PERMISSIVE、OFF_PERMISSIVE set @@global.gtid_mode=ON_PERMISSIVE; set @@global.gtid_mode=OFF_PERMISSIVE; ----3、检查global.gtid_owned变量字符串已经为空 select @@global.gtid_owned; ----4、主备库关闭GTID SET @@GLOBAL.GTID_MODE = OFF; enforce_gtid_consistency=OFF