2018-02-06 centos7 安装Mariadb并创建多实例来源ZHANGSIR.org

一、安装

1.1 yum 安装

[root@linux-node1 ~]# yum install mariadb mariadb-server -y

1.2 启动并初始化

[root@linux-node1 ~]# service mariadb start

[root@linux-node1 ~]# mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB

SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current

password for the root user. If you've just installed MariaDB, and

you haven't set the root password yet, the password will be blank,

so you should just press enter here.

Enter current password for root (enter for none):

OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB

root user without the proper authorisation.

Set root password? [Y/n] Y

New password:

Re-enter new password:

Password updated successfully!

Reloading privilege tables..

... Success!

By default, a MariaDB installation has an anonymous user, allowing anyone

to log into MariaDB without having to have a user account created for

them. This is intended only for testing, and to make the installation

go a bit smoother. You should remove them before moving into a

production environment.

Remove anonymous users? [Y/n] Y

... Success!

Normally, root should only be allowed to connect from 'localhost'. This

ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] n

... skipping.

By default, MariaDB comes with a database named 'test' that anyone can

access. This is also intended only for testing, and should be removed

before moving into a production environment.

Remove test database and access to it? [Y/n] n

... skipping.

Reloading the privilege tables will ensure that all changes made so far

will take effect immediately.

Reload privilege tables now? [Y/n] Y

... Success!

Cleaning up...

All done! If you've completed all of the above steps, your MariaDB

installation should now be secure.

Thanks for using MariaDB!

1.3 检查登录情况

[root@linux-node1 ~]# mysql -uroot -p123456

Welcome to the MariaDB monitor. Commands end with ; or \g.

Your MariaDB connection id is 7

Server version: 5.5.52-MariaDB MariaDB Server

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

二、创建多实例

2.1 创建目录

[root@linux-node1 ~]# mkdir /home/multiMysql

[root@linux-node1 ~]# mkdir /home/multiMysql/{etc,socket,bin,datadir}

在/home目录下创建multiMysql文件夹，并在里面创建etc,socket,bin,datadir这四个文件夹备用。

现在我们在datadir中创建3个文件夹以放置三个实例的数据文件：3307,3308,3309

[root@linux-node1 ~]# mkdir /home/multiMysql/datadir/{3307,3308,3309}

然后用mysql_install_db来生成即将使用的多个实例的数据文件，首先需要对/home/multiMysql进行递归授权防止之后的操作出现权限不够的情况：

[root@linux-node1 ~]# chmod -R 777 /home/multiMysql

2.2 初始化实例

$ mysql_install_db --basedir=/usr --datadir=/home/multiMysql/datadir/3307 --user=mysql

$ mysql_install_db --basedir=/usr --datadir=/home/multiMysql/datadir/3308 --user=mysql

$ mysql_install_db --basedir=/usr --datadir=/home/multiMysql/datadir/3309 --user=mysql

其中的参数--basedir是指mysql的二进制文件目录（误？），--datadir是指即将安装到的数据库文件目录，如果不知道--basedir该怎么填，可以登录进mysql后查询：

MariaDB [(none)]> show variables like '%basedir%';

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| basedir | /usr |

+---------------+-------+

1 row in set (0.01 sec)

--user是指mysql实例将使用的在linux系统中的用户，最好命名为mysql，yum安装后一般都有这个用户，如果没有可以自主创建：

2.3 创建多实例配置文件

2.3.1 创建共用配置文件

$ mkdir /home/multiMysql/etc/my.cnf.d/

#vim /home/multiMysql/etc/my.cnf.d/my.cnf

[mysqld]

skip-name-resolve

lower_case_table_names=1

innodb_file_per_table=1

back_log = 50

max_connections = 300

max_connect_errors = 1000

table_open_cache = 2048

max_allowed_packet = 16M

binlog_cache_size = 2M

max_heap_table_size = 64M

sort_buffer_size = 2M

join_buffer_size = 2M

thread_cache_size = 64

thread_concurrency = 8

query_cache_size = 64M

query_cache_limit = 2M

ft_min_word_len = 4

default-storage-engine = innodb

thread_stack = 192K

transaction_isolation = REPEATABLE-READ

tmp_table_size = 64M

log-bin=mysql-bin

binlog_format=row

slow_query_log

long_query_time = 1

server-id = 1

key_buffer_size = 8M

read_buffer_size = 2M

read_rnd_buffer_size = 2M

bulk_insert_buffer_size = 64M

myisam_sort_buffer_size = 128M

myisam_max_sort_file_size = 10G

myisam_repair_threads = 1

myisam_recover

innodb_additional_mem_pool_size = 16M

innodb_buffer_pool_size = 200M

innodb_data_file_path = ibdata1:10M:autoextend

innodb_file_io_threads = 8

innodb_thread_concurrency = 16

innodb_flush_log_at_trx_commit = 1

innodb_log_buffer_size = 16M

innodb_log_file_size = 512M

innodb_log_files_in_group = 3

innodb_max_dirty_pages_pct = 60

innodb_lock_wait_timeout = 120

[mysqldump]

quick

max_allowed_packet = 256M

[mysql]

no-auto-rehash

prompt=\\u@\\d \\R:\\m>

[myisamchk]

key_buffer_size = 512M

sort_buffer_size = 512M

read_buffer = 8M

write_buffer = 8M

[mysqlhotcopy]

interactive-timeout

[mysqld_safe]

open-files-limit = 8192

2.3.2 创建三个实例的配置文件：

#3307

#vim 3307.cnf

[client]

port = 3307

socket = /home/multiMysql/socket/mysql3307.sock

[mysqld]

datadir=/home/multiMysql/datadir/3307

port = 3307

server_id =1

socket = /home/multiMysql/socket/mysql3307.sock

!includedir /home/multiMysql/etc/my.cnf.d

#3308

vim 3308.cnf

[client]

port = 3308

socket = /home/multiMysql/socket/mysql3308.sock

[mysqld]

datadir=/home/multiMysql/datadir/3308

port = 3308

socket = /home/multiMysql/socket/mysql3308.sock

#3309

#vim 3309.cnf

[client]

port = 3309

socket = /home/multiMysql/socket/mysql3309.sock

[mysqld]

datadir=/home/multiMysql/datadir/3309

port = 3309

socket = /home/multiMysql/socket/mysql3309.sock

2.4 启动实例

$ /usr/bin/mysqld_safe --defaults-file=/home/multiMysql/etc/3307.cnf &

$ /usr/bin/mysqld_safe --defaults-file=/home/multiMysql/etc/3308.cnf &

$ /usr/bin/mysqld_safe --defaults-file=/home/multiMysql/etc/3309.cnf &

2.5 登录查看

[root@linux-node1 etc]# mysql -u root -S /home/multiMysql/socket/mysql3307.sock

Welcome to the MariaDB monitor. Commands end with ; or \g.

Your MariaDB connection id is 1

Server version: 5.5.52-MariaDB MariaDB Server

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

MariaDB [(none)]> \q

Bye

[root@linux-node1 etc]# mysql -u root -S /home/multiMysql/socket/mysql3308.sock

Welcome to the MariaDB monitor. Commands end with ; or \g.

Your MariaDB connection id is 1

Server version: 5.5.52-MariaDB MariaDB Server

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> \q

Bye

[root@linux-node1 etc]# mysql -u root -S /home/multiMysql/socket/mysql3309.sock

Welcome to the MariaDB monitor. Commands end with ; or \g.

Your MariaDB connection id is 1

Server version: 5.5.52-MariaDB MariaDB Server

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

2.6 创建密码

MariaDB [(none)]> update mysql.user set password=password('123456') where User="root" and Host="localhost";

MariaDB [(none)]> flush privileges;

2.7 停止实例

$ mysqladmin -uroot -p123456 -S /home/multiMysql/socket/mysql3307.sock shutdown

$ mysqladmin -uroot -p123456 -S /home/multiMysql/socket/mysql3308.sock shutdown

$ mysqladmin -uroot -p123456 -S /home/multiMysql/socket/mysql3309.sock shutdown

三、启动脚本

#3307

#vim /home/multiMysql/bin/mysql3307

#!/bin/bash

mysql_port=3307

mysql_username="root"

mysql_password="123456"

function_start_mysql()

{

printf "Starting MySQL...\n"

mysqld_safe --defaults-file=/home/multiMysql/etc/${mysql_port}.cnf 2>&1 > /dev/null &

}

function_stop_mysql()

{

printf "Stoping MySQL...\n"

mysqladmin -u ${mysql_username} -p${mysql_password} -S /home/multiMysql/socket/mysql${mysql_port}.sock shutdown

}

function_restart_mysql()

{

printf "Restarting MySQL...\n"

function_stop_mysql

function_start_mysql

}

function_kill_mysql()

{

kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')

kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')

}

case $1 in

start)

function_start_mysql;;

stop)

function_stop_mysql;;

kill)

function_kill_mysql;;

restart)

function_stop_mysql

function_start_mysql;;

echo "Usage: /data/dbdata_${mysql_port}/mysqld {start|stop|restart|kill}";;

esac

#3308

#vim /home/multiMysql/bin/mysql3308

#!/bin/bash

mysql_port=3308

mysql_username="root"

mysql_password="123456"

function_start_mysql()

{

printf "Starting MySQL...\n"

mysqld_safe --defaults-file=/home/multiMysql/etc/${mysql_port}.cnf 2>&1 > /dev/null &

}

function_stop_mysql()

{

printf "Stoping MySQL...\n"

mysqladmin -u ${mysql_username} -p${mysql_password} -S /home/multiMysql/socket/mysql${mysql_port}.sock shutdown

}

function_restart_mysql()

{

printf "Restarting MySQL...\n"

function_stop_mysql

function_start_mysql

}

function_kill_mysql()

{

kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')

kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')

}

case $1 in

start)

function_start_mysql;;

stop)

function_stop_mysql;;

kill)

function_kill_mysql;;

restart)

function_stop_mysql

function_start_mysql;;

echo "Usage: /data/dbdata_${mysql_port}/mysqld {start|stop|restart|kill}";;

esac

#3309

#vim /home/multiMysql/bin/mysql3309

#!/bin/bash

mysql_port=3309

mysql_username="root"

mysql_password="123456"

function_start_mysql()

{

printf "Starting MySQL...\n"

mysqld_safe --defaults-file=/home/multiMysql/etc/${mysql_port}.cnf 2>&1 > /dev/null &

}

function_stop_mysql()

{

printf "Stoping MySQL...\n"

mysqladmin -u ${mysql_username} -p${mysql_password} -S /home/multiMysql/socket/mysql${mysql_port}.sock shutdown

}

function_restart_mysql()

{

printf "Restarting MySQL...\n"

function_stop_mysql

function_start_mysql

}

function_kill_mysql()

{

kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')

kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')

}

case $1 in

start)

function_start_mysql;;

stop)

function_stop_mysql;;

kill)

function_kill_mysql;;

restart)

function_stop_mysql

function_start_mysql;;

echo "Usage: /data/dbdata_${mysql_port}/mysqld {start|stop|restart|kill}";;

esac

######################################################################

$ /usr/bin/mysqld_safe --defaults-file=/home/multiMysql/etc/3307.cnf &

$ /usr/bin/mysqld_safe --defaults-file=/home/multiMysql/etc/3308.cnf &

$ /usr/bin/mysqld_safe --defaults-file=/home/multiMysql/etc/3309.cnf &

遇到问题

数据库初始化后，必须用mysqld_safe进行后台启动，然后通过端口号进行登录，修改数据库的秘码以及权限调整。开始我直接用写好的脚本进行启动的，密码都是自己设定的肯定成功不了，看报错在百度也解决不了问题，浪费一天时间，看杨哥博客仔细看才发现出的问题，不够细心。感谢杨哥的博客非常认真！！！

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2018-02-06 centos7 安装Mariadb并创建多实例 来源ZHANGSIR.org

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2018-02-06 centos7 安装Mariadb并创建多实例来源ZHANGSIR.org