mysql5.7单实例安装(二进制)

1.下载二进制安装包
mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
tar -xvf mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz

2.拷贝安装包和配置文件(如果没有特殊情况，将安装包解压放置在该目录)
cp -rf mysql /usr/local/mysql
cp -rf my5.7.cnf /etc/my.cnf

3.创建mysql用户
useradd mysql

4.添加数据目录
mkdir -p /home/mysql3306/mysql3306
mkdir -p /home/mysql3306/logs

5.修改目录权限
chown mysql:mysql -R /home/mysql3306

6.修改配置文件
socket          = /tmp/mysql.sock(socket文件存放位置)
datadir         = /home/mysql3306/mysql3306(数据文件存放目录)
server-id               = 12023306(设置serverid 命名规则:ip后两位+端口号)
port            = 3306(启动端口)
innodb_buffer_pool_size         = 1024M(innodb buffer pool大小)
*如果是核心节点单实例 配置成系统总内存的75%左右，如果不是核心节点则按照具体业务压力来设置

7.初始化数据库(确认2个OK)
/usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf --initialize --basedir=/usr/local/mysql --datadir=/home/mysql3306/mysql3306 --user=mysql
--initialize 初始化后自动设置随机密码
--initialize-insecure 初始化不进行随机密码的赋予
--basedir=/usr/local/mysql mysql安装目录
--datadir=/home/mysql3306/mysql3306 mysql数据目录

在mysql-error.log中寻找初始密码
2018-03-13T07:18:45.762441+08:00 1 [Note] A temporary password is generated for root@localhost: W2O?kK-g#:y7

8.启动mysql5.7

点击(此处)折叠或打开

1. # /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf --user=mysql &
2. [2] 2478
3. [root@mysql5 logs]# 2018-03-12T23:23:23.847910Z mysqld_safe Logging to '/home/mysql3306/logs/mysql-error.log'.
4. 2018-03-12T23:23:23.886684Z mysqld_safe Starting mysqld daemon with databases from /home/mysql3306/mysql3306

9.进入mysql5.7
# /usr/local/mysql/bin/mysql -S /tmp/mysql3306.sock -p
初始化密码

点击(此处)折叠或打开

1. mysql> show databases;
2. ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
3. mysql> set password=password('root')
4. -> ;
5. Query OK, 0 rows affected, 1 warning (0.00 sec)
7. mysql> flush privileges;
8. Query OK, 0 rows affected (0.02 sec)

10.配置环境变量
vi /etc/profile
export MYSQL_HOME=/usr/local/mysql
PATH=$PATH:$MYSQL_HOME/bin

如果系统之前自带低版本mysql,则会发生下面的情况,没有指向预定的路径:
[root@mysql5 logs]# which mysql
/usr/bin/mysql

删除之前版本的mysql
yum -y remove mysql*
source /etc/profile

或者
rm -rf /usr/bin/mysql*
ln -s /usr/local/mysql/bin/mysql /usr/bin/mysql