Mysql-5.5版本搭建实例的部分库的从库

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

 1 [client]
 2 port            = 3307
 3 socket          = /tmp/mysql_3307.sock
 4 
 5 [mysqld]
 6 port            = 3307
 7 socket          = /tmp/mysql_3307.sock
 8 datadir         = /opt/mysql_3307
 9 tmpdir=/tmp
10 
11 skip-name-resolve
12 log_warnings = 2
13 
14 #skip-grant-tables
15 big_tables              = on
16 back_log                = 600
17 max_connections         = 3000
18 max_connect_errors      = 3000
19 table_open_cache        = 2048
20 max_allowed_packet      = 128m
21 binlog_cache_size       = 4m
22 max_heap_table_size     = 1024m
23 read_buffer_size        = 16m
24 read_rnd_buffer_size    = 16m
25 sort_buffer_size        = 8m
26 join_buffer_size        = 16m
27 thread_cache_size       = 600
28 thread_concurrency      = 16
29 query_cache_size        = 512m
30 query_cache_limit       = 32m
31 default-storage-engine  = myisam
32 #thread_stack           = 192k
33 #transaction_isolation  = repeatable read
34 tmp_table_size          = 1024m
35 
36 server-id               = 10155
37 log-bin                 = mysql-bin
38 binlog_format           = mixed
39 expire_logs_days        = 8
40 
41 replicate_wild_ignore_table  = performance_schema.%
42 replicate_wild_ignore_table  = information_schema.%
43 replicate_wild_ignore_table  = mysql.%
44 replicate_wild_ignore_table  = test.%
45 replicate_wild_ignore_table  = tmp.%
46 #skip-name-resolve
47 
48 slave_net_timeout       = 30
49 #master-connect-retry   = 10
50 
51 log-slave-updates       = 1
52 
53 slow_query_log          = sql-slow.log
54 long_query_time         = 5
55 slave-skip-errors       = 1062,1236
56 
57 key_buffer_size                 = 2g
58 bulk_insert_buffer_size         = 64m
59 myisam_sort_buffer_size         = 128m
60 myisam_max_sort_file_size       = 4g
61 myisam_repair_threads           = 1
62 myisam_recover
63 
64 innodb_additional_mem_pool_size = 16m
65 innodb_buffer_pool_size = 4g
66 innodb_data_file_path = ibdata1:256m:autoextend
67 innodb_write_io_threads = 8
68 innodb_read_io_threads = 8
69 innodb_thread_concurrency = 16
70 innodb_flush_log_at_trx_commit = 2
71 innodb_log_buffer_size = 16m
72 innodb_log_file_size = 256m
73 innodb_log_files_in_group = 3
74 innodb_max_dirty_pages_pct = 90
75 innodb_lock_wait_timeout = 60
76 innodb_file_per_table   = 1
77 
78 [mysqldump]
79 quick
80 max_allowed_packet = 32m
81 
82 [mysql]
83 no-auto-rehash
84 
85 [myisamchk]
86 key_buffer_size = 512m
87 sort_buffer_size = 512m
88 read_buffer = 8m
89 write_buffer = 8m
90 
91 [mysqlhotcopy]
92 interactive-timeout
93 
94 [mysqld_safe]
95 open-files-limit = 10240
96 #log-error=/opt/mysql_3307/mysqld.log
97 long_query_time = 3
98 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。