## 創(chuàng)建mysql目錄
mkdir -p /usr/app/mysql
## 移動到目錄下
cd /usr/app/mysql
## 使用xhell上傳文件到服務器
## 解壓后重命名
tar -zxvf mysql-8.0.20-el7-x86_64.tar.gz
mv mysql-8.0.20-el7-x86_64 mysql-8.0

## 創(chuàng)建各實例數(shù)據(jù)存放目錄
mkdir -p /usr/app/mysql/mysql-8.0/{3306,3307,3308}/data
## 創(chuàng)建各個mysql對應error日志
mkdir -p /usr/app/mysql/mysql-8.0/{3306,3307,3308}/log
touch /usr/app/mysql/mysql-8.0/3306/log/error.log
touch /usr/app/mysql/mysql-8.0/3307/log/error.log
touch /usr/app/mysql/mysql-8.0/3308/log/error.log
## 創(chuàng)建mysql用戶組及用戶
groupadd mysql
useradd -g mysql mysql
## 目錄歸屬賦權(quán)
chown -R mysql:mysql /usr/app/mysql

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html

[client]
default-character-set=utf8mb4

[mysqld]
user=mysql
basedir=/usr/app/mysql/mysql-8.0
lower_case_table_names=1

[mysqld_multi]
mysqld=/usr/app/mysql/mysql-8.0/bin/mysqld_safe
mysqladmin=/usr/app/mysql/mysql-8.0/bin/mysqladmin
log=/usr/app/mysql/mysql-8.0/mysqld_multi.log

# 3306 數(shù)據(jù)庫實例
[mysqld3306]
port=3306
server_id=1
mysqld=mysqld
mysqladmin=mysqladmin
datadir=/usr/app/mysql/mysql-8.0/3306/data
socket=/tmp/mysql_3306.sock
log-error=/usr/app/mysql/mysql-8.0/3306/log/error.log
pid-file=/usr/app/mysql/mysql-8.0/3306/mysql3306.pid

## skip-grant-tables #用于跳過密碼登錄
character_set_server=utf8mb4
init_connect='SET NAMES utf8mb4'
lower_case_table_names=1
explicit_defaults_for_timestamp=true


# 3307 數(shù)據(jù)庫實例
[mysqld3307]
port=3307
server_id=2
mysqld=mysqld
mysqladmin=mysqladmin
datadir=/usr/app/mysql/mysql-8.0/3307/data
socket=/tmp/mysql_3307.sock
log-error=/usr/app/mysql/mysql-8.0/3307/log/error.log
pid-file=/usr/app/mysql/mysql-8.0/3307/mysql3307.pid
# lc_messages_dir=/usr/local/mysql/share/english

## 默認最大連接數(shù)設置
# max_connections=300
character_set_server=utf8mb4
init_connect='SET NAMES utf8mb4'
lower_case_table_names=1
explicit_defaults_for_timestamp=true

# 3308 數(shù)據(jù)庫實例
[mysqld3308]
port=3308
server_id=3
mysqld=mysqld
mysqladmin=mysqladmin
datadir=/usr/app/mysql/mysql-8.0/3308/data
socket=/tmp/mysql_3308.sock
log-error=/usr/app/mysql/mysql-8.0/3308/log/error.log
pid-file=/usr/app/mysql/mysql-8.0/3308/mysql3308.pid
# lc_messages_dir=/usr/local/mysql/share/english

character_set_server=utf8mb4
init_connect='SET NAMES utf8mb4'
lower_case_table_names=1
explicit_defaults_for_timestamp=true

/usr/app/mysql/mysql-8.0/bin/mysqld --defaults-file=/etc/my.cnf --datadir=/usr/app/mysql/mysql-8.0/3306/data/ --initialize
/usr/app/mysql/mysql-8.0/bin/mysqld --defaults-file=/etc/my.cnf --datadir=/usr/app/mysql/mysql-8.0/3307/data/ --initialize
/usr/app/mysql/mysql-8.0/bin/mysqld --defaults-file=/etc/my.cnf --datadir=/usr/app/mysql/mysql-8.0/3308/data/ --initialize

## 在/etc/profile 文件末尾添加
export PATH=/usr/app/mysql/mysql-8.0/bin:$PATH

## 使環(huán)境變量生效
source /etc/profile

## 啟動mysql
mysqld_multi --defaults-file=/etc/my.cnf start 3306
mysqld_multi --defaults-file=/etc/my.cnf start 3307
mysqld_multi --defaults-file=/etc/my.cnf start 3308

## 查看mysql服務
mysqld_multi --defaults-file=/etc/my.cnf report

## 服務器登錄 （注意：另外兩個實例同樣如此。）
mysql -uroot -p -S /tmp/mysql_3306.sock
## 輸入上面初始化數(shù)據(jù)庫時的臨時密碼

## 設置本地訪問密碼，例如：Mysql@123，注意密碼為高安保等級（例如大小寫和特殊字符的組合），不然無法使用其他操作
ALTER USER 'root'@'localhost' IDENTIFIED BY 'Mysql@123';
## 進入mysql數(shù)據(jù)
use mysql;
## 更新root信息
update user set host='%' where user='root';
## 刷新
flush privileges;
# 授權(quán)root用戶可以遠程登陸
GRANT ALL ON *.* TO 'root'@'%';
## 遠程連接設置
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'Mysql@123';
## 刷新
flush privileges;

## 開放防火墻端口
firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --zone=public --add-port=3307/tcp --permanent
firewall-cmd --zone=public --add-port=3308/tcp --permanent

## 查看開放端口
firewall-cmd --list-port

## 配置生效
firewall-cmd --reload