centos7安装配置mysql5.7

摘抄自：http://www.centoscn.com/mysql/2016/0626/7537.html

一 安装yum源

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
yum localinstall mysql57-community-release-el7-8.noarch.rpm

检查yum源：

yum repolist enabled | grep "mysql.*-community.*"

结果显示如下三行，表示成功：

mysql-connectors-community/x86_64       MySQL Connectors Community           42
mysql-tools-community/x86_64            MySQL Tools Community                51
mysql57-community/x86_64                MySQL 5.7 Community Server          207

二 安装mysql

yum install mysql-community-server

三 启动mysql

systemctl start mysqld

四 查看mysql状态

systemctl status mysqld

显示如下，表示成功：

● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2017-09-16 16:18:34 CST; 25s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process: 5692 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
  Process: 5594 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
 Main PID: 5694 (mysqld)
   CGroup: /system.slice/mysqld.service
           └─5694 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid

Sep 16 16:18:29 centos7-10.211.55.5.shared systemd[1]: Starting MySQL Server...
Sep 16 16:18:34 centos7-10.211.55.5.shared systemd[1]: Started MySQL Server.

五 设置开机启动

systemctl enable mysqld
systemctl daemon-reload

六 密码修改

先查看root的密码：

grep 'temporary password' /var/log/mysqld.log

显示密码如下：RK5&C(pW*AG(

2017-09-16T08:18:31.881461Z 1 [Note] A temporary password is generated for root@localhost: RK5&C(pW*AG(

登陆：

mysql -uroot -p

然后输入上边的密码进行登录，之后修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'Zhaojigang123!';

七 配置编码

vi /etc/my.cnf
添加如下内容：
character_set_server=utf8
init_connect='SET NAMES utf8'

八 重启mysql

systemctl restart mysqld

九 使用mysql客户端进行连接

客户端可以使用navicat或者AquaDataStudio18。

注意：如果mysql部署在远程机器上，此时首先需要关闭远程机器的防火墙，其次需要创建一个用户授予远程访问权限（因为mysql只允许root用户在本机访问）

1 关闭防火墙：centos7关闭防火墙

2 创建一个用户授予远程访问权限：通过root账号登陆mysql，之后执行：

GRANT ALL PRIVILEGES ON *.* TO 'zhaojigang'@'%' IDENTIFIED BY 'Zhaojigang123!' WITH GRANT OPTION;