mysql-多实例

一、MySQL 多实例

1、简介

什么使多实例呢？

多实例就是在一台机器上开启多个不同的服务端口（如：3306,3307）；

运行多个MySQL服务进程，这些进程通过不同的socket监听不同的服务端口来提供各自的服务。

MySQL多实例共用一个 MySQL 的安装程序，使用不同（也可相同）的 my.cnf 配置文件，启动程序和数据文件。

在提供服务时，多实例 MySQL 在逻辑上是各自独立的，多个实例的本身是根据配置文件对应的设定值，来获得服务器的相关硬件资源多少。

2、安装配置前操作

安装配置前的一些配置少不了

文件的目录最好也规矩，这样才专业

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/data/ops/app/mysql-5.6.23/     ###mysql的安装路径 mkdir /data/ops/app/mysql-5.6.23/{3306,3307} vim /data/ops/app/mysql-5.6.23/etc/3306.cnf   [client] character-set-server = utf8   [mysql] character-set-server = utf8   [mysqld] #bind-address=127.0.0.1 character-set-server = utf8 datadir=/data/ops/app/mysql-5.6.23/3306 socket=/data/ops/app/mysql-5.6.23/3306/3306.sock user=mysql skip-grant-tables   symbolic-links=0 skip-name-resolve   #init-connect='insert into accesslog.accesslog(id, time, localname, matchname) values(connection_id(), now(), user(),current_user());'   slow_query_log = 1 long_query_time = 4 #slow-query-log-file = /data/ops/app/mysql-5.6.23/logs/3306/3306_slow.log log-queries-not-using-indexes = false lower-case-table-names = 1   server-id = 1 max_connections =5000 max_allowed_packet = 16M connect_timeout = 60 log-slave-updates log-bin = 3306-bin expire_logs_days = 7 slave-skip-errors = 1062 #binlog_do_db = back_log = 200 max_connect_errors = 10 table_open_cache = 10240   binlog_cache_size = 1M max_heap_table_size = 64M sort_buffer_size = 4M join_buffer_size = 4M thread_cache_size = 8 thread_concurrency = 8 query_cache_size = 512M query_cache_limit = 2M ft_min_word_len = 4 thread_stack = 192K transaction_isolation = REPEATABLE-READ tmp_table_size = 64M binlog_format = mixed log-short-format key_buffer_size = 512M read_buffer_size = 16M read_rnd_buffer_size = 16M bulk_insert_buffer_size = 64M innodb_file_per_table innodb_additional_mem_pool_size = 100M innodb_buffer_pool_size = 1G innodb_data_file_path = ibdata1:12M;ibdata2:12M:autoextend innodb_file_io_threads = 4 innodb_thread_concurrency = 8 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 8M innodb_log_file_size = 256M innodb_log_files_in_group = 3 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 slave-skip-errors = 1062   [mysqld_safe] log-error=/data/ops/app/mysql-5.6.23/logs/3306/3306.log pid-file=/data/ops/app/mysql-5.6.23/3306/3306.pid

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vim /data/ops/app/mysql-5.6.23/etc/3307.cnf  ### 配置文件   [client] character-set-server = utf8   [mysql] character-set-server = utf8   [mysqld] #bind-address=127.0.0.1 character-set-server = utf8 datadir=/data/ops/app/mysql-5.6.23/3307 socket=/data/ops/app/mysql-5.6.23/3307/3307.sock user=mysql skip-grant-tables   symbolic-links=0 skip-name-resolve   #init-connect='insert into accesslog.accesslog(id, time, localname, matchname) values(connection_id(), now(), user(),current_user());'   slow_query_log = 1 long_query_time = 4 slow-query-log-file = /data/ops/app/mysql-5.6.23/logs/3307/3307_slow.log log-queries-not-using-indexes = false lower-case-table-names = 1   server-id = 1 max_connections =5000 max_allowed_packet = 16M connect_timeout = 60 log-slave-updates log-bin = 3307-bin expire_logs_days = 7 slave-skip-errors = 1062 #binlog_do_db = back_log = 200 max_connect_errors = 10 table_open_cache = 10240   binlog_cache_size = 1M max_heap_table_size = 64M sort_buffer_size = 4M join_buffer_size = 4M thread_cache_size = 8 thread_concurrency = 8 query_cache_size = 512M query_cache_limit = 2M ft_min_word_len = 4 thread_stack = 192K transaction_isolation = REPEATABLE-READ tmp_table_size = 64M binlog_format = mixed log-short-format key_buffer_size = 512M read_buffer_size = 16M read_rnd_buffer_size = 16M bulk_insert_buffer_size = 64M innodb_file_per_table innodb_additional_mem_pool_size = 100M innodb_buffer_pool_size = 1G innodb_data_file_path = ibdata1:12M;ibdata2:12M:autoextend innodb_file_io_threads = 4 innodb_thread_concurrency = 8 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 8M innodb_log_file_size = 256M innodb_log_files_in_group = 3 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 slave-skip-errors = 1062   [mysqld_safe] log-error=/data/ops/app/mysql-5.6.23/logs/3307/3307.log pid-file=/data/ops/app/mysql-5.6.23/3307/3307.pid

###创建初始化脚本以及启动文件

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vim /data/ops/app/mysql-5.6.23/scripts/init/3306.sh   #/bin/bash # 3306.sh can create a 3306 instance # create directories if [ ! -d '/data/ops/app/mysql-5.6.23/3306' ];then   mkdir -p '/data/ops/app/mysql-5.6.23/3306'; fi if [ ! -d '/data/ops/app/mysql-5.6.23/logs/3306' ];then   mkdir -p '/data/ops/app/mysql-5.6.23/logs/3306'; fi   # set env conf="/data/ops/app/mysql-5.6.23/etc/3306.cnf" basedir="/data/ops/app/mysql-5.6.23" datadir="/data/ops/app/mysql-5.6.23/3306" pid="/data/ops/app/mysql-5.6.23/3306/3306.pid" sock="/data/ops/app/mysql-5.6.23/3306/3306.sock" port='3000' user='mysql'   # create instance #/data/ops/app/mysql-5.6.23/scripts/mysql_install_db --user=$user --basedir=$basedir --datadir=$datadir   # boot instance /data/ops/app/mysql-5.6.23/bin/mysqld_safe --defaults-file=$conf --user=$user --basedir=$basedir --datadir=$datadir --port=$port --pid-file=$pid --socket=$sock &

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vim /data/ops/app/mysql-5.6.23/scripts/init/3307.sh   #/bin/bash # 3307.sh can create a 3307 instance # create directories if [ ! -d '/data/ops/app/mysql-5.6.23/3307' ];then   mkdir -p '/data/ops/app/mysql-5.6.23/3307'; fi if [ ! -d '/data/ops/app/mysql-5.6.23/logs/3307' ];then   mkdir -p '/data/ops/app/mysql-5.6.23/logs/3307'; fi   # set env conf="/data/ops/app/mysql-5.6.23/etc/3307.cnf" basedir="/data/ops/app/mysql-5.6.23" datadir="/data/ops/app/mysql-5.6.23/3307" pid="/data/ops/app/mysql-5.6.23/3307/3307.pid" sock="/data/ops/app/mysql-5.6.23/3307/3307.sock" port='3002' user='mysql'   # create instance #/data/ops/app/mysql-5.6.23/scripts/mysql_install_db --user=$user --basedir=$basedir --datadir=$datadir   # boot instance /data/ops/app/mysql-5.6.23/bin/mysqld_safe --defaults-file=$conf --user=$user --basedir=$basedir --datadir=$datadir --port=$port --pid-file=$pid --socket=$sock &

#####注意初始化脚本完毕以后mysql才能启动

su --shell=/bin/bash mysql -c "/data/ops/app/mysql-5.6.23/scripts/init/3306.sh"                               ###启动脚本 可以放在/etc/rc.local下 开机自启

su --shell=/bin/bash mysql -c "/data/ops/app/mysql-5.6.23/scripts/init/3307.sh"

####mysql关闭

killall mysqld  不建议这样操作

mysqladmin -u mysql -P 3002 -S /data/ops/app/mysql-5.6.23/3307/3307.sock shutdown            ###建议这样关闭数据库

 

增加一个mysql实例

问题又来了，要增加一个实例怎么弄呢？

其实不难，只需按上面步骤，创建目录，在修改相应配置文件，初始化就ok