mysql多实例的配置

1、创建多实例的目录：

mkdir -p /data/mysql/mysql_3307/{data,tmp,logs}

mkdir -p /data/mysql/mysql_3308/{data,tmp,logs}

 

2、修改my.cnf的配置文件

vi /data/mysql/mysql_3306/my3306.cnf 

#my.cnf

[client]

port            = 3306

socket          = /data/mysql/mysql_3306/tmp/mysql_3306.sock

 

[mysql]

prompt=[3306]>

#tee=/data/mysql/mysql_3306/data/query.log

no-auto-rehash

 

[mysqld]

user = mysql

basedir = /usr/local/mysql

datadir = /data/mysql/mysql_3306/data

port = 3306

socket = /data/mysql/mysql_3306/tmp/mysql_3306.sock

event_scheduler = 0

tmpdir = /data/mysql/mysql_3306/tmp

 

 

 

#timeout

interactive_timeout = 300

wait_timeout = 300

 

#character set

character-set-server = utf8

 

#open_files_limit = 65535

max_connections = 100

max_connect_errors = 100000

 

skip-name-resolve = 1

#logs

log-output=file

slow_query_log = 1

slow_query_log_file = slow.log

log-error = /data/mysql/mysql_3306/data/error.log

log_warnings = 2

pid-file = mysql.pid

long_query_time = 1

#log-slow-admin-statements = 1

#log-queries-not-using-indexes = 1

log-slow-slave-statements = 1

 

 

 

#binlog

binlog_format = mixed

server-id = 203306

log-bin = /data/mysql/mysql_3306/logs/mybinlog

binlog_cache_size = 4M

max_binlog_size = 1G

max_binlog_cache_size = 2G

sync_binlog = 0

expire_logs_days = 10

 

#relay log

skip_slave_start = 1

max_relay_log_size = 1G

relay_log_purge = 1

relay_log_recovery = 1

log_slave_updates

#slave-skip-errors=1032,1053,1062

 

explicit_defaults_for_timestamp=1

#buffers & cache

table_open_cache = 2048

table_definition_cache = 2048

table_open_cache = 2048

max_heap_table_size = 96M

sort_buffer_size = 2M

join_buffer_size = 2M

thread_cache_size = 256

query_cache_size = 0

query_cache_type = 0

query_cache_limit = 256K

query_cache_min_res_unit = 512

thread_stack = 192K

tmp_table_size = 96M

key_buffer_size = 8M

read_buffer_size = 2M

read_rnd_buffer_size = 16M

bulk_insert_buffer_size = 32M

 

#myisam

myisam_sort_buffer_size = 128M

myisam_max_sort_file_size = 10G

myisam_repair_threads = 1

 

#innodb

innodb_buffer_pool_size = 100M

innodb_buffer_pool_instances = 1

innodb_data_file_path = ibdata1:1G:autoextend

innodb_flush_log_at_trx_commit = 2

innodb_log_buffer_size = 64M

innodb_log_file_size = 256M

innodb_log_files_in_group = 3

innodb_max_dirty_pages_pct = 50

innodb_file_per_table = 1

innodb_rollback_on_timeout

innodb_status_file = 1

innodb_io_capacity = 2000

transaction_isolation = READ-COMMITTED

innodb_flush_method = O_DIRECT

 

[mysqld_safe]

open_file_limit = 65535

 

 

 

 

3、复制配置文件到其他实例的目录：

cp /data/mysql/mysql_3306/my3306.cnf /data/mysql/mysql_3307/my3307.cnf

cp /data/mysql/mysql_3306/my3306.cnf /data/mysql/mysql_3308/my3308.cnf

 

 

 

4、修改其他实例的目录路径

vi /data/mysql/mysql_3307/my3307.cnf

:%s/3306/3307/g

 

vi /data/mysql/mysql_3308/my3308.cnf

:%s/3306/3308/g

 

 

 

5、赋予权限：

chown -R mysql:mysql /usr/local/mysql

chown -R mysql:mysql /data

chown -R mysql:mysql /opt/mysql

 

 

 

6、多实例的初始化：

cd  /usr/local/mysql

./scripts/mysql_install_db --user=mysql --datadir=/data/mysql/mysql_3306/data --defaults-file=/data/mysql/mysql_3306/my3306.cnf

./scripts/mysql_install_db --user=mysql --datadir=/data/mysql/mysql_3307/data --defaults-file=/data/mysql/mysql_3307/my3307.cnf

./scripts/mysql_install_db --user=mysql --datadir=/data/mysql/mysql_3308/data --defaults-file=/data/mysql/mysql_3308/my3308.cnf

 

 

7、启动进程：

/usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql/mysql_3306/my3306.cnf &

/usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql/mysql_3307/my3307.cnf &

/usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql/mysql_3308/my3308.cnf &

 

 

8、查看指定文件目录是否存在：（每个实例在启动前都要查看）

ll /data/mysql/mysql_3306/tmp

srwxrwxrwx 1 mysql mysql 0 Dec 18 07:08 mysql_3306.sock

 

ll /data/mysql/mysql_3307/tmp

srwxrwxrwx 1 mysql mysql 0 Dec 18 07:10 mysql_3307.sock

 

ll /data/mysql/mysql_3308/tmp

srwxrwxrwx 1 mysql mysql 0 Dec 18 07:22 mysql_3308.sock

 

 

9、多实例的登陆方式：

mysql --protocol=tcp -h 127.0.0.1 -uroot -P3306  --socket=/data/mysql/mysql_3306/tmp/mysql_3306.sock

mysql --protocol=tcp -h 127.0.0.1 -uroot -P3307  --socket=/data/mysql/mysql_3307/tmp/mysql_3307.sock

mysql --protocol=tcp -h 127.0.0.1 -uroot -P3308  --socket=/data/mysql/mysql_3308/tmp/mysql_3308.sock

 

 

10、关闭mysql：

mysqladmin -S   /data/mysql/mysql_3308/tmp/mysql_3306.sock shutdown

mysqladmin -S   /data/mysql/mysql_3308/tmp/mysql_3307.sock shutdown

mysqladmin -S   /data/mysql/mysql_3308/tmp/mysql_3308.sock shutdown