MySQL 5.7 Distrib 5.7.8-rc 主从复制的简单配置，备忘

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需要补充 mysql5.7的AA复制了，项目需要。

以前写过5.6的主从复制，但是猛然发现5.7.8的好处，是速度比5.6快，是的，你没看错，不过是ORACLE官方数据说快一倍，也许没有那么快。

有三个主要特点优势比5.6：

1、MySQL 5.7 修改了半同步中主库提交的事务的顺序，after sync 模式避免了幻读发生。

2、MySQL 5.7 半同步增强，增加 rpl_semi_sync_master_wait_slave_count 参数控制主库接收多少个slave 写事务成功反馈才返回成功给客户端 。

3、原来有dump thread 发送event和接收slave ack 模式，独立出 单独 接收slave 返回 ack的进程，提高半同步模式的tps 。

mysql> select host,user,authentication_string from user;

+-----------------+------+-------------------------------------------+

| host | user | authentication_string |

+-----------------+------+-------------------------------------------+

| localhost | root | *CF855080CC9EF389F5967EFBA2384DA9094AF7B3 |

| 118.242.237.108 | user | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

+-----------------+------+-------------------------------------------+

2 rows in set (0.00 sec)

masters上

授予权限：

GRANT ALL PRIVILEGES ON *.* TO 'user'@'118.242.237.108' identified by '123456';

FLUSH PRIVILEGES;

/etc/my.cnf

[mysqld]

user = mysql

log-bin = mysql-bin

server-id = 1

binlog-do-db = dns

binlog-ignore-db = mysql

replicate-do-db = dns

replicate-ignore-db = mysql

log-slave-updates

slave-skip-errors = all

sync_binlog = 1

auto_increment_increment = 2

auto_increment_offset = 1

log_slow_queries = /var/log/mysql-slow.log

mysql> show variables like "%log_%";

+------------------------------------------+-------------------------------------------+

| Variable_name | Value |

+------------------------------------------+-------------------------------------------+

| binlog_cache_size | 32768 |

| binlog_checksum | CRC32 |

| binlog_direct_non_transactional_updates | OFF |

| binlog_error_action | ABORT_SERVER |

| binlog_format | ROW |

| binlog_group_commit_sync_delay | 0 |

| binlog_group_commit_sync_no_delay_count | 0 |

| binlog_gtid_simple_recovery | ON |

| binlog_max_flush_queue_time | 0 |

| binlog_order_commits | ON |

| binlog_row_image | FULL |

| binlog_rows_query_log_events | OFF |

| binlog_stmt_cache_size | 32768 |

| expire_logs_days | 0 |

| general_log_file | /usr/local/mysql/data/ns1.log |

| innodb_flush_log_at_timeout | 1 |

| innodb_flush_log_at_trx_commit | 1 |

| innodb_log_buffer_size | 16777216 |

| innodb_log_checksum_algorithm | innodb |

| innodb_log_compressed_pages | ON |

| innodb_log_file_size | 50331648 |

| innodb_log_files_in_group | 2 |

| innodb_log_group_home_dir | ./ |

| innodb_log_write_ahead_size | 8192 |

| innodb_max_undo_log_size | 1073741824 |

| innodb_online_alter_log_max_size | 134217728 |

| innodb_undo_log_truncate | OFF |

| innodb_undo_logs | 128 |

| log_backward_compatible_user_definitions | OFF |

| log_bin | ON |

| log_bin_basename | /usr/local/mysql/data/mysql-bin |

| log_bin_index | /usr/local/mysql/data/mysql-bin.index |

| log_bin_trust_function_creators | OFF |

| log_bin_use_v1_row_events | OFF |

| log_error | /usr/local/mysql/data/ns1.e-green.org.err |

| log_error_verbosity | 3 |

| log_output | FILE |

| log_queries_not_using_indexes | OFF |

| log_slave_updates | ON |

| log_slow_admin_statements | OFF |

| log_slow_slave_statements | OFF |

| log_syslog | OFF |

| log_syslog_facility | daemon |

| log_syslog_include_pid | ON |

| log_syslog_tag | |

| log_throttle_queries_not_using_indexes | 0 |

| log_timestamps | UTC |

| log_warnings | 2 |

| max_binlog_cache_size | 18446744073709547520 |

| max_binlog_size | 1073741824 |

| max_binlog_stmt_cache_size | 18446744073709547520 |

| max_relay_log_size | 0 |

| relay_log_basename | |

| relay_log_index | |

| relay_log_info_file | relay-log.info |

| relay_log_info_repository | FILE |

| relay_log_purge | ON |

| relay_log_recovery | OFF |

| relay_log_space_limit | 0 |

| slow_query_log_file | /usr/local/mysql/data/ns1-slow.log |

| sql_log_bin | ON |

| sql_log_off | OFF |

| sync_relay_log_info | 10000 |

+------------------------------------------+-------------------------------------------+

63 rows in set, 1 warning (0.00 sec)

>flush logs；

看master状态，获取Position值，但是获取之后请勿操作MYSQL，否则大麻烦。

mysql> show master status;

+------------------+----------+--------------+------------------+-------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000001 | 967 | dns | mysql | |

+------------------+----------+--------------+------------------+-------------------+

1 row in set (0.00 sec)

mysql> show master logs;

+------------------+-----------+

| Log_name | File_size |

+------------------+-----------+

| mysql-bin.000001 | 967 |

+------------------+-----------+

1 row in set (0.00 sec)

重置主的master状态：

mysql> reset master;

slave上：

GRANT ALL PRIVILEGES ON *.* TO 'user'@'118.242.237.106' identified by '123456';

FLUSH PRIVILEGES;

/etc/my.cnf

[mysqld]

user = mysql

log-bin = mysql-bin

server-id = 2

binlog-do-db = dns

binlog-ignore-db = mysql

replicate-do-db = dns

replicate-ignore-db = mysql

log-slave-updates

slave-skip-errors = all

sync_binlog = 1

auto_increment_increment = 2

auto_increment_offset = 2

配置从服务器Slave：

change master to

master_host='118.242.237.106',

master_user='user',

master_password='123456',

master_log_file='mysql-bin.000001',

master_log_pos=967;

启动从服务器复制功能 Mysql>start slave;

检查从服务器复制功能状态：

mysql> show slave status\G

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 118.242.237.106

Master_User: user

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000001

Read_Master_Log_Pos: 1796

Relay_Log_File: ns2-relay-bin.000008

Relay_Log_Pos: 320

Relay_Master_Log_File: mysql-bin.000001

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Replicate_Do_DB: dns

Replicate_Ignore_DB: mysql

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: 1796

Relay_Log_Space: 525

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: 1

Master_UUID: 190e7a4b-5ddf-11e5-9899-005056a19a19

Master_Info_File: /usr/local/mysql-5.7.8-rc-linux-glibc2.5-x86_64/data/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:

Executed_Gtid_Set:

Auto_Position: 0

Replicate_Rewrite_DB:

Channel_Name:

1 row in set (0.00 sec)

mysql>

Slave_IO及Slave_SQL进程必须正常运行，即YES状态





做之前把两边数据库同步一样，复制过去解压覆盖从库。

cd /usr/local/mysql

tar -zcf mysql.slave.tar.gz data/

scp –Pxxxx mysql.slave.tar.gz root@118.242.237.108:/usr/local/mysql

tar -zxvf mysql.slave.tar.gz