mysql多实例

准备工作

pkill mysqld

ps -ef|grep mysql

rm -rf /etc/init.d/mysqld

mkdir -p /data/{3306,3307}/data

tree /data/

1 [client]
 2 port            = 3306
 3 socket          = /data/3306/mysql.sock
 4 
 5 [mysql]
 6 no-auto-rehash
 7 
 8 [mysqld]
 9 user    = mysql
10 port    = 3306
11 socket  = /data/3306/mysql.sock
12 basedir = /application/mysql
13 datadir = /data/3306/data
14 open_files_limit    = 1024
15 back_log = 600
16 max_connections = 800
17 max_connect_errors = 3000
18 table_cache = 614
19 external-locking = FALSE
20 max_allowed_packet =8M
21 sort_buffer_size = 1M
22 join_buffer_size = 1M
23 thread_cache_size = 100
24 thread_concurrency = 2
25 query_cache_size = 2M
26 query_cache_limit = 1M
27 query_cache_min_res_unit = 2k
28 #default_table_type = InnoDB
29 thread_stack = 192K
30 #transaction_isolation = READ-COMMITTED
31 tmp_table_size = 2M
32 max_heap_table_size = 2M
33 long_query_time = 1
34 #log_long_format
35 #log-error = /data/3306/error.log
36 #log-slow-queries = /data/3306/slow.log
37 pid-file = /data/3306/mysql.pid
38 log-bin = /data/3306/mysql-bin
39 relay-log = /data/3306/relay-bin
40 relay-log-info-file = /data/3306/relay-log.info
41 binlog_cache_size = 1M
42 max_binlog_cache_size = 1M
43 max_binlog_size = 2M
44 expire_logs_days = 7
45 key_buffer_size = 16M
46 read_buffer_size = 1M
47 read_rnd_buffer_size = 1M
48 bulk_insert_buffer_size = 1M
49 #myisam_sort_buffer_size = 1M
50 #myisam_max_sort_file_size = 10G
51 #myisam_max_extra_sort_file_size = 10G
52 #myisam_repair_threads = 1
53 #myisam_recover
54 
55 lower_case_table_names = 1
56 skip-name-resolve
57 slave-skip-errors = 1032,1062
58 replicate-ignore-db=mysql
59 
60 server-id = 1
61 
62 innodb_additional_mem_pool_size = 4M
63 innodb_buffer_pool_size = 32M
64 innodb_data_file_path = ibdata1:128M:autoextend
65 innodb_file_io_threads = 4
66 innodb_thread_concurrency = 8
67 innodb_flush_log_at_trx_commit = 2
68 innodb_log_buffer_size = 2M
69 innodb_log_file_size = 4M
70 innodb_log_files_in_group = 3
71 innodb_max_dirty_pages_pct = 90
72 innodb_lock_wait_timeout = 120
73 innodb_file_per_table = 0
74 [mysqldump]
75 quick
76 max_allowed_packet = 2M
77 
78 [mysqld_safe]
79 log-error=/data/3306/mysql_oldboy3306.err
80 pid-file=/data/3306/mysqld.pid

3306-my.cnf

1 #!/bin/sh
 2 ################################################
 3 #this scripts is created by oldboy at 2007-06-09
 4 #oldboy QQ:31333741
 5 #site:http://www.etiantian.org
 6 #blog:http://oldboy.blog.51cto.com
 7 #oldboy trainning QQ group: 208160987 226199307  44246017
 8 ################################################
 9 
10 #init
11 port=3306
12 mysql_user="root"
13 mysql_pwd="oldboy"
14 CmdPath="/application/mysql/bin"
15 mysql_sock="/data/${port}/mysql.sock"
16 #startup function
17 function_start_mysql()
18 {
19     if [ ! -e "$mysql_sock" ];then
20       printf "Starting MySQL...\n"
21       /bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 > /dev/null &
22     else
23       printf "MySQL is running...\n"
24       exit
25     fi
26 }
27 
28 #stop function
29 function_stop_mysql()
30 {
31     if [ ! -e "$mysql_sock" ];then
32        printf "MySQL is stopped...\n"
33        exit
34     else
35        printf "Stoping MySQL...\n"
36        ${CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown
37    fi
38 }
39 
40 #restart function
41 function_restart_mysql()
42 {
43     printf "Restarting MySQL...\n"
44     function_stop_mysql
45     sleep 2
46     function_start_mysql
47 }
48 
49 case $1 in
50 start)
51     function_start_mysql
52 ;;
53 stop)
54     function_stop_mysql
55 ;;
56 restart)
57     function_restart_mysql
58 ;;
59 *)
60     printf "Usage: /data/${port}/mysql {start|stop|restart}\n"
61 esac

3306-mysql

1 [client]
 2 port            = 3307
 3 socket          = /data/3307/mysql.sock
 4 
 5 [mysql]
 6 no-auto-rehash
 7 
 8 [mysqld]
 9 user    = mysql
10 port    = 3307
11 socket  = /data/3307/mysql.sock
12 basedir = /application/mysql
13 datadir = /data/3307/data
14 open_files_limit    = 1024
15 back_log = 600
16 max_connections = 800
17 max_connect_errors = 3000
18 table_cache = 614
19 external-locking = FALSE
20 max_allowed_packet =8M
21 sort_buffer_size = 1M
22 join_buffer_size = 1M
23 thread_cache_size = 100
24 thread_concurrency = 2
25 query_cache_size = 2M
26 query_cache_limit = 1M
27 query_cache_min_res_unit = 2k
28 #default_table_type = InnoDB
29 thread_stack = 192K
30 #transaction_isolation = READ-COMMITTED
31 tmp_table_size = 2M
32 max_heap_table_size = 2M
33 #long_query_time = 1
34 #log_long_format
35 #log-error = /data/3307/error.log
36 #log-slow-queries = /data/3307/slow.log
37 pid-file = /data/3307/mysql.pid
38 #log-bin = /data/3307/mysql-bin
39 relay-log = /data/3307/relay-bin
40 relay-log-info-file = /data/3307/relay-log.info
41 binlog_cache_size = 1M
42 max_binlog_cache_size = 1M
43 max_binlog_size = 2M
44 expire_logs_days = 7
45 key_buffer_size = 16M
46 read_buffer_size = 1M
47 read_rnd_buffer_size = 1M
48 bulk_insert_buffer_size = 1M
49 #myisam_sort_buffer_size = 1M
50 #myisam_max_sort_file_size = 10G
51 #myisam_max_extra_sort_file_size = 10G
52 #myisam_repair_threads = 1
53 #myisam_recover
54 
55 lower_case_table_names = 1
56 skip-name-resolve
57 slave-skip-errors = 1032,1062
58 replicate-ignore-db=mysql
59 
60 server-id = 3
61 
62 innodb_additional_mem_pool_size = 4M
63 innodb_buffer_pool_size = 32M
64 innodb_data_file_path = ibdata1:128M:autoextend
65 innodb_file_io_threads = 4
66 innodb_thread_concurrency = 8
67 innodb_flush_log_at_trx_commit = 2
68 innodb_log_buffer_size = 2M
69 innodb_log_file_size = 4M
70 innodb_log_files_in_group = 3
71 innodb_max_dirty_pages_pct = 90
72 innodb_lock_wait_timeout = 120
73 innodb_file_per_table = 0
74 [mysqldump]
75 quick
76 max_allowed_packet = 2M
77 
78 [mysqld_safe]
79 log-error=/data/3307/mysql_oldboy3307.err
80 pid-file=/data/3307/mysqld.pid

3307-my.cnf

1 #!/bin/sh
 2 ################################################
 3 #this scripts is created by oldboy at 2007-06-09
 4 #oldboy QQ:31333741
 5 #site:http://www.etiantian.org
 6 #blog:http://oldboy.blog.51cto.com
 7 #oldboy trainning QQ group: 208160987 226199307  44246017
 8 ################################################
 9 
10 #init
11 port=3307
12 mysql_user="root"
13 mysql_pwd="oldboy"
14 CmdPath="/application/mysql/bin"
15 mysql_sock="/data/${port}/mysql.sock"
16 #startup function
17 function_start_mysql()
18 {
19     if [ ! -e "$mysql_sock" ];then
20       printf "Starting MySQL...\n"
21       /bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 > /dev/null &
22     else
23       printf "MySQL is running...\n"
24       exit
25     fi
26 }
27 
28 #stop function
29 function_stop_mysql()
30 {
31     if [ ! -e "$mysql_sock" ];then
32        printf "MySQL is stopped...\n"
33        exit
34     else
35        printf "Stoping MySQL...\n"
36        ${CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown
37    fi
38 }
39 
40 #restart function
41 function_restart_mysql()
42 {
43     printf "Restarting MySQL...\n"
44     function_stop_mysql
45     sleep 2
46     function_start_mysql
47 }
48 
49 case $1 in
50 start)
51     function_start_mysql
52 ;;
53 stop)
54     function_stop_mysql
55 ;;
56 restart)
57     function_restart_mysql
58 ;;
59 *)
60     printf "Usage: /data/${port}/mysql {start|stop|restart}\n"
61 esac

3307-mysql

1 [client]
 2 port            = 3308
 3 socket          = /data/3308/mysql.sock
 4 
 5 [mysql]
 6 no-auto-rehash
 7 
 8 [mysqld]
 9 user    = mysql
10 port    = 3308
11 socket  = /data/3308/mysql.sock
12 basedir = /application/mysql
13 datadir = /data/3308/data
14 open_files_limit    = 1024
15 back_log = 600
16 max_connections = 800
17 max_connect_errors = 3000
18 table_cache = 614
19 external-locking = FALSE
20 max_allowed_packet =8M
21 sort_buffer_size = 1M
22 join_buffer_size = 1M
23 thread_cache_size = 100
24 thread_concurrency = 2
25 query_cache_size = 2M
26 query_cache_limit = 1M
27 query_cache_min_res_unit = 2k
28 #default_table_type = InnoDB
29 thread_stack = 192K
30 #transaction_isolation = READ-COMMITTED
31 tmp_table_size = 2M
32 max_heap_table_size = 2M
33 #long_query_time = 1
34 #log_long_format
35 #log-error = /data/3308/error.log
36 #log-slow-queries = /data/3308/slow.log
37 pid-file = /data/3308/mysql.pid
38 #log-bin = /data/3308/mysql-bin
39 relay-log = /data/3308/relay-bin
40 relay-log-info-file = /data/3308/relay-log.info
41 binlog_cache_size = 1M
42 max_binlog_cache_size = 1M
43 max_binlog_size = 2M
44 expire_logs_days = 7
45 key_buffer_size = 16M
46 read_buffer_size = 1M
47 read_rnd_buffer_size = 1M
48 bulk_insert_buffer_size = 1M
49 #myisam_sort_buffer_size = 1M
50 #myisam_max_sort_file_size = 10G
51 #myisam_max_extra_sort_file_size = 10G
52 #myisam_repair_threads = 1
53 #myisam_recover
54 
55 lower_case_table_names = 1
56 skip-name-resolve
57 slave-skip-errors = 1032,1062
58 replicate-ignore-db=mysql
59 
60 server-id = 5
61 
62 innodb_additional_mem_pool_size = 4M
63 innodb_buffer_pool_size = 32M
64 innodb_data_file_path = ibdata1:128M:autoextend
65 innodb_file_io_threads = 4
66 innodb_thread_concurrency = 8
67 innodb_flush_log_at_trx_commit = 2
68 innodb_log_buffer_size = 2M
69 innodb_log_file_size = 4M
70 innodb_log_files_in_group = 3
71 innodb_max_dirty_pages_pct = 90
72 innodb_lock_wait_timeout = 120
73 innodb_file_per_table = 0
74 [mysqldump]
75 quick
76 max_allowed_packet = 2M
77 
78 [mysqld_safe]
79 log-error=/data/3308/mysql_oldboy3307.err
80 pid-file=/data/3308/mysqld.pid

3308-my.cnf

1 #!/bin/sh
 2 ################################################
 3 #this scripts is created by oldboy at 2007-06-09
 4 #oldboy QQ:31333741
 5 #site:http://www.etiantian.org
 6 #blog:http://oldboy.blog.51cto.com
 7 #oldboy trainning QQ group: 208160987 226199307  44246017
 8 ################################################
 9 
10 #init
11 port=3308
12 mysql_user="root"
13 mysql_pwd="oldboy"
14 CmdPath="/application/mysql/bin"
15 mysql_sock="/data/${port}/mysql.sock"
16 #startup function
17 function_start_mysql()
18 {
19     if [ ! -e "$mysql_sock" ];then
20       printf "Starting MySQL...\n"
21       /bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 > /dev/null &
22     else
23       printf "MySQL is running...\n"
24       exit
25     fi
26 }
27 
28 #stop function
29 function_stop_mysql()
30 {
31     if [ ! -e "$mysql_sock" ];then
32        printf "MySQL is stopped...\n"
33        exit
34     else
35        printf "Stoping MySQL...\n"
36        ${CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown
37    fi
38 }
39 
40 #restart function
41 function_restart_mysql()
42 {
43     printf "Restarting MySQL...\n"
44     function_stop_mysql
45     sleep 2
46     function_start_mysql
47 }
48 
49 case $1 in
50 start)
51     function_start_mysql
52 ;;
53 stop)
54     function_stop_mysql
55 ;;
56 restart)
57     function_restart_mysql
58 ;;
59 *)
60     printf "Usage: /data/${port}/mysql {start|stop|restart}\n"
61 esac

3308-mysql

unzip data.zip /

rm -rf /data.zip

[root@oldboy /]# find /data/  -type f -name "mysql" |xargs ls -l

-rw-r--r--. 1 root root 1307 Jul 15  2013 /data/3306/mysql

-rw-r--r--. 1 root root 1307 Jul 21  2013 /data/3307/mysql

[root@oldboy /]# find /data/ -name mysql

/data/3307/mysql

/data/3306/mysql

多实例的自动和停止

初始化:

/application/mysql/bin/mysqld_safe  --defaults-file=/data/3306/my.cnf 2>&1 > /dev/null &

/application/mysql/bin/mysqld_safe  --defaults-file=/data/3307/my.cnf 2>&1 > /dev/null &

/application/mysql/scripts/mysql_install_db  --basedir=/application/mysql --datadir=/data/3306/data --user=mysql
 /application/mysql/scripts/mysql_install_db  --basedir=/application/mysql --datadir=/data/3307/data --user=mysql
chown -R mysql.mysql  /data
 chmod +x  /data/3306/mysql 
chmod +x  /data/3307/mysql 
[需要复制多实例文件mysqll到目录下]
[root@oldboy data]# ./3306/mysql start
Starting MySQL...
[root@oldboy data]# ./3307/mysql start 
Starting MySQL...
[root@oldboy data]# netstat -lntup |grep 3306
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      3339/mysqld         
[root@oldboy data]# netstat -lntup |grep 3307
tcp        0      0 0.0.0.0:3307                0.0.0.0:*                   LISTEN      4056/mysqld

登陆进去mysql命令

mysql -S /data/3307/mysql.sock

停止会报错，因为停止数据库默认要指定密码 的，所以要先把mysql里面密码改为空

改密码

[root@oldboy 3306]# mysqladmin -uroot -S /data/3306/mysql.sock password 'oldboy123'
[root@oldboy 3306]# mysqladmin -uroot -S /data/3307/mysql.sock password 'oldboy123'

然后修改msyql 密码

为了安全  要去更改mysql权限

[root@oldboy data]# find /data  -type f  -name "mysql" -exec chmod 700 {} \;
[root@oldboy data]# find /data  -type f  -name "mysql" -exec ls -l {} \;  
-rwx------. 1 mysql mysql 1310 Oct 25 23:04 /data/3307/mysql
-rwx------. 1 mysql mysql 1310 Oct 25 23:04 /data/3306/mysql
配置好密码后 再次登录 必须输入密码
mysql -uroot -poldboy123 -S /data/3306/mysql.sock

 常见问题：

单实例mysql

启动：

Mysql启动原理

优雅关闭数据库：

多实例msyql登录：

设置密码：

修改密码：

找回丢失的密码：

多实例msyql启动修改丢失root密码方法
1，关闭msyql
killall mysqld
2，启动时候加--skip-grant-tables参数
mysqld_safe --defaults-file=/data/3306/my.cnf --skip-grant-table &
mysql -uroot -p  -S /data/3308/mysql.sock
3,修改密码
update mysql.user set password=PASSWORD('123456') where user='root';
FLUSH PRIVILEGES; 
关闭mysql
mysqladmin -uroot -p123456 shutdown -S /data/3308/mysql.sock 
重启mysql
 /data/3308/mysql start
重新登录mysql
mysql -uroot -p123456 -S /data/3308/mysql.sock

一个小故障解决：