标签：mysql双主复制
软件：
主机A IP：192.168.1.201
主机B IP：192.168.1.202
操作系统：centos6.5-x86
Mysql版本：mysql-5.7.12-linux-glibc2.5-x86_64.tar.gz
安装依赖包：yum install libaio-devel glibc perl –y
关闭SElinux及IPtables：
/etc/init.d/iptables stop && setenforce 0 && sed –I ‘s/SELINUX=enforcing/SELINUX=disabled/’ /etc/selinux/config
一、Mysql安装配置
■1.Mysql安装
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groupadd mysql useradd -g mysql -s /sbin/nologin -M mysql tar xf mysql-5.7.12-linux-glibc2.5-x86_64.tar.gz mv mysql-5.7.12-linux-glibc2.5-x86_64 /usr/local/mysql mkdir /usr/local/mysql/datachown -R root:mysql /usr/local/mysql/ chown -R mysql:mysql /usr/local/mysql/data/ > /etc/my.cnf cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
■2.配置Mysql
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vim /etc/init.d/mysqld basedir=/usr/local/mysql datadir=/usr/local/mysql/data
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vim /etc/my.cnf
[mysqld] ########basic settings######## server-id = 1 #另一台ID不同 port = 3306 user = mysql bind_address = 192.168.1.201 #另一台IP不用 autocommit = 0 character_set_server=utf8mb4 skip_name_resolve = 1 max_connections = 800 max_connect_errors = 1000 datadir = /usr/local/mysql/data transaction_isolation = READ-COMMITTED explicit_defaults_for_timestamp = 1 join_buffer_size = 134217728 tmp_table_size = 67108864 tmpdir = /tmp max_allowed_packet = 16777216 sql_mode = "STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER" interactive_timeout = 1800 wait_timeout = 1800 read_buffer_size = 16777216 read_rnd_buffer_size = 33554432 sort_buffer_size = 33554432 ########log settings######## log_error = error.log slow_query_log = 1 slow_query_log_file = slow.log log_queries_not_using_indexes = 1 log_slow_admin_statements = 1 log_slow_slave_statements = 1 log_throttle_queries_not_using_indexes = 10 expire_logs_days = 90 long_query_time = 2 min_examined_row_limit = 100 ########replication settings######## master_info_repository = TABLE relay_log_info_repository = TABLE log_bin = bin.log sync_binlog = 1 gtid_mode = on enforce_gtid_consistency = 1 log_slave_updates binlog_format = row relay_log = relay.log relay_log_recovery = 1 binlog_gtid_simple_recovery = 1 slave_skip_errors = all # slave slave-parallel-type = LOGICAL_CLOCK slave-parallel-workers = 0 #slave-parallel-workers = 16 ########innodb settings######## innodb_buffer_pool_size = 750M //内存的75%比较合适 innodb_buffer_pool_instances = 16 innodb_buffer_pool_load_at_startup = 1 innodb_buffer_pool_dump_at_shutdown = 1 innodb_lru_scan_depth = 2000 innodb_lock_wait_timeout = 10000 innodb_io_capacity = 4000 innodb_io_capacity_max = 8000 innodb_flush_method = O_DIRECT innodb_flush_neighbors = 1 innodb_log_file_size = 4G innodb_log_buffer_size = 16777216 innodb_purge_threads = 4 innodb_large_prefix = 1 innodb_thread_concurrency = 64 innodb_print_all_deadlocks = 1 innodb_strict_mode = 1 innodb_sort_buffer_size = 67108864 innodb_flush_log_at_trx_commit = 2 innodb_read_io_threads = 16 innodb_write_io_threads = 16 ########semi sync replication settings######## plugin_dir=/usr/local/mysql/lib/plugin plugin_load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so" loose_rpl_semi_sync_master_enabled = 1 loose_rpl_semi_sync_slave_enabled = 1 loose_rpl_semi_sync_master_timeout = 5000 [mysqld-5.7] innodb_buffer_pool_dump_pct = 40 innodb_page_cleaners = 4 innodb_undo_log_truncate = 1 innodb_max_undo_log_size = 2G innodb_purge_rseg_truncate_frequency = 128 binlog_gtid_simple_recovery=1 log_timestamps=system transaction_write_set_extraction=MURMUR32 show_compatibility_56=on
■3.初始化目录
5.7已经不用mysql_install_db初始化了，已经改成下面这个命令了
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/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --initialize /etc/init.d/mysqld start
■4.设置密码
5.7比较讨厌，初始密码不为空了，也可以说安全性更高了。
初始化密码在初始化日志里
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grep "temporary password" /usr/local/mysql/data/error.log 2016-07-04T09:50:17.455227+08:00 1 [Note] A temporary password is generated for root@localhost: wLEM;g+?&1eF /usr/local/mysql/bin/mysql -uroot -p #输入日志里的密码 mysql> alter user ‘root‘@‘localhost‘ identified by ‘123456‘; mysql> flush privileges;
#修改密码
■5.设置数据同步
#两台Mysql同时添加同步用户
mysql> create user ‘repl‘@‘192.168.1.%‘ identified by ‘123456‘; mysql> GRANT REPLICATION SLAVE ON *.* TO ‘repl‘@‘192.168.1.%‘; mysql> flush privileges;
锁一下表，追平两台机器数据，然后解锁。
先看看GTID是否打开
mysql> show global variables like ‘%gtid%‘; +--------------------------+-------+ | Variable_name | Value | +--------------------------+-------+ | enforce_gtid_consistency | ON | | gtid_executed | | | gtid_mode | ON | | gtid_owned | | | gtid_purged | | +--------------------------+-------+ 5 rows in set (0.10 sec)
#说明gtid功能已启动。
GTID同步数据不用再记录对方的log文件和位置了，用master_auto_position=1就行，不过你用老的方法查看master的logfile和logpos，同步也是可以的。
#在两台Mysql上都运行，IP得互指
mysql> change master to master_host=‘192.168.1.201‘, master_user=‘repl‘,master_password=‘123456‘,master_auto_position=1;
mysql> start slave;
show slave status\G ;
#表示同步的文件和位置
Master_Log_File:
Read_Master_Log_Pos: 4
#显示下面表示工作正常
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
#表示当前同步的数据库
Replicate_Do_DB: nzabbix,szabbix
错误一：
mysql> start slave;
ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository
解决方法：
mysql> reset slave;
错误二：
Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; these ids must be different for replication to work (or the --replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it).
解决方法：
修改my.cnf配置文件中，slave_skip_errors = all
本文出自 “抚琴煮酒” 博客，请务必保留此出处http://szk5043.blog.51cto.com/8456440/1812480
标签：mysql双主复制
原文地址：http://szk5043.blog.51cto.com/8456440/1812480
