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

2015 年 9 月 22 日1,1320

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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

 

mysql578

 

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

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