由于业务需要在MySQL实例中创建部分库的从库,已有的Mysql实例的版本是mysql-5.5.49,是一个非常老的版本。
本文档涉及到服务器中运行多实例和构建实例中部分库的从库。
服务器 | mysql端口 | 功能 |
---|---|---|
服务器1 | 3306 | 主库 |
服务器2 | 3307 | 服务器1中部分库的从库 |
1、服务器2上创建3307实例
首先需要准备源码编译包,这个就不在描述了。由于我服务器2上已经存在了一个同样版本的实例,我就直接copy一份,命名为: mysql-5.5.49_3307 ,并做了一个软连接
ln -s mysql-5.5.49_3307 mysql_3307
服务器2的3307实例是从库,my.cnf的配置最好服务器1主库实例的配置相同,注意修改对应server_id
[client] port = 3307 socket = /tmp/mysql_3307.sock
[mysqld] port = 3307 socket = /tmp/mysql_3307.sock datadir = /opt/mysql_3307 tmpdir=/tmp
skip-name-resolve log_warnings = 2
#skip-grant-tables big_tables = on back_log = 600 max_connections = 3000 max_connect_errors = 3000 table_open_cache = 2048 max_allowed_packet = 128M binlog_cache_size = 4M max_heap_table_size = 1024M read_buffer_size = 16M read_rnd_buffer_size = 16M sort_buffer_size = 8M join_buffer_size = 16M thread_cache_size = 600 thread_concurrency = 16 query_cache_size = 512M query_cache_limit = 32M default-storage-engine = MYISAM #thread_stack = 192K #transaction_isolation = REPEATABLE READ tmp_table_size = 1024M
server-id = 10155 log-bin = mysql-bin binlog_format = mixed expire_logs_days = 8
replicate_wild_ignore_table = performance_schema.% replicate_wild_ignore_table = information_schema.% replicate_wild_ignore_table = mysql.% replicate_wild_ignore_table = test.% replicate_wild_ignore_table = tmp.% #skip-name-resolve
slave_net_timeout = 30 #master-connect-retry = 10
log-slave-updates = 1
slow_query_log = sql-slow.log long_query_time = 5 slave-skip-errors = 1062,1236
key_buffer_size = 2G bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 4G myisam_repair_threads = 1 myisam_recover
innodb_additional_mem_pool_size = 16M innodb_buffer_pool_size = 4G innodb_data_file_path = ibdata1:256M:autoextend innodb_write_io_threads = 8 innodb_read_io_threads = 8 innodb_thread_concurrency = 16 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 16M innodb_log_file_size = 256M innodb_log_files_in_group = 3 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 60 innodb_file_per_table = 1
[mysqldump] quick max_allowed_packet = 32M
[mysql] no-auto-rehash
[myisamchk] key_buffer_size = 512M sort_buffer_size = 512M read_buffer = 8M write_buffer = 8M
[mysqlhotcopy] interactive-timeout
[mysqld_safe] open-files-limit = 10240 #log-error=/opt/mysql_3307/mysqld.log long_query_time = 3 log-slow-queries=/opt/mysql_3307/mysql_slow_query.log
注意 添加忽略到不需要同步的主库,(涉及隐私就贴部分公共库出来了)
replicate_wild_ignore_table = performance_schema.% replicate_wild_ignore_table = information_schema.% replicate_wild_ignore_table = mysql.% replicate_wild_ignore_table = test.% replicate_wild_ignore_table = tmp.%
创建数据目录,目录名称一定和my.cnf文件中 “datadir” 配置相同
mkdir -p /opt/mysql_3307
初始化数据库
/usr/local/mysql_3307/scripts/mysql_install_db --defaults-file=/etc/my_3307.cnf --user=mysql --basedir=/usr/local/mysql-5.5.49_3307/ --datadir=/opt/mysql_3307/
启动数据库
nohup /usr/local/mysql_3307/bin/mysqld_safe --defaults-file=/etc/my_3307.cnf &
登录设置root密码,第一次登陆不需要输入密码
#/usr/local/mysql_3307/bin/mysql -uroot -S /tmp/mysql_3307.sock mysql>update mysql.user set password=PASSWORD('123456') where User='root'; mysql>flush privileges;
2、服务器1上导出实例3306的部分库(需要做从库的数据库)
本次需要对 wcd_ft 这个数据库做从库
/usr/local/mysql/bin/mysqldump -uroot -p --single-transaction --master-data=2 -R --database wcd_ft > wcd_ft.sql
将备份文件传输到服务器2上。
登录数据库创建用于同步的数据库用户
mysql>grant replication slave on *.* to 'repl'@'%' identified by 'repl123'; mysql>flush privileges;
3、服务器2上导入数据库
在服务器2上导入刚备份的数据库
/usr/local/mysql_3307/bin/mysql -uroot -p -S /tmp/mysql_3307.sock < wcd_ft.sql
查看数据库备份文件 wcd_ft.sql 的主库master信息
grep -i "change master" wcd_ft.sql
结果:
-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.007289', MASTER_LOG_POS=662625023;
完成后,登录数据库配置主从库的同步。
CHANGE MASTER TO MASTER_HOST='10.10.18.10(服务器1的ip地址)', MASTER_USER='repl', MASTER_PASSWORD='repl123', MASTER_LOG_FILE='mysql-bin.007289', MASTER_LOG_POS=662625023;
#启动slave从库 start slave;
查看从库的同步状态
show slave status\G;
配置完成。