linux-tutorial/docs/deploy/tool/mysql/install-mysql.md

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2018-09-30 18:05:21 +08:00
# Mysql 安装
系统环境Centos7
## 安装配置
通过 rpm 包安装
centos 的 yum 源中默认是没有 mysql 的,所以我们需要先去官网下载 mysql 的 repo 源并安装。
### 安装 mysql yum 源
官方下载地址https://dev.mysql.com/downloads/repo/yum/
1下载 yum 源
```sh
$ wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
```
2安装 yum repo 文件并更新 yum 缓存
```sh
$ rpm -ivh mysql80-community-release-el7-1.noarch.rpm
```
执行结果:
会在 /etc/yum.repos.d/ 目录下生成两个 repo 文件
```sh
ls | grep mysql
mysql-community.repo
mysql-community-source.repo
```
更新 yum
```
yum clean all
yum makecache
```
3查看 rpm 安装状态
```sh
$ yum repolist enabled | grep mysql.*
mysql-connectors-community/x86_64 MySQL Connectors Community 65
mysql-tools-community/x86_64 MySQL Tools Community 69
mysql80-community/x86_64 MySQL 8.0 Community Server 33
```
### 安装 mysql 服务器
```sh
$ yum install mysql-community-server
```
### 启动 mysql 服务
```sh
# 启动 mysql 服务
$ systemctl start mysqld.service
# 查看运行状态
$ systemctl status mysqld.service
# 开机启动
$ systemctl enable mysqld
$ systemctl daemon-reload
```
### 初始化数据库密码
查看一下初始密码
```sh
$ grep "password" /var/log/mysqld.log
2018-09-30T03:13:41.727736Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: %:lt+srWu4k1
```
执行命令:
```sh
mysql -uroot -p
```
输入临时密码,进入 mysql
```sh
ALTER user 'root'@'localhost' IDENTIFIED BY 'Tw#123456';
```
注:密码强度默认为中等,大小写字母、数字、特殊符号,只有修改成功后才能修改配置再设置更简单的密码
### 配置远程访问
```
GRANT ALL ON *.* TO 'root'@'localhost';
FLUSH PRIVILEGES;
```
### 跳过登录认证
```
vim /etc/my.cnf
```
在 [mysqld] 下面加上 skip-grant-tables
作用是登录时跳过登录认证,换句话说就是 root 什么密码都可以登录进去。
执行 `service mysqld restart`,重启 mysql
## 参考资料
https://www.cnblogs.com/xiaopotian/p/8196464.html
https://www.cnblogs.com/bigbrotherer/p/7241845.html
https://blog.csdn.net/managementandjava/article/details/80039650
http://www.manongjc.com/article/6996.html
https://www.cnblogs.com/xyabk/p/8967990.html