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content/post/mysql-install.md
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content/post/mysql-install.md
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---
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title: "安装 Mysql"
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date: 2019-10-30T13:00:28+08:00
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lastmod: 2022-03-28T19:00:00+08:00
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tags: ["centos", "yum", "mysql"]
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categories: ["database"]
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---
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## CentOS7 yum 安装 Mysql5.7
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### 环境
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- CentOS 7.4 x86_64 最小安装
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- MySQL 5.7.20
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### 安装 mysql yum 源
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- 下载 rpm 包
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```bash
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# repo 地址: https://repo.mysql.com/
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cd /root/
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curl -O https://repo.mysql.com/mysql57-community-release-el7.rpm
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```
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- 安装 mysql 源
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```bash
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rpm -ivh /root/mysql57-community-release-el7.rpm
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```
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- 更新 yum 缓存
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```bash
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yum clean all
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yum makecache fast
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```
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### 安装 mysql
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- yum 安装 mysql 包
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```bash
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yum install mysql-community-server
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```
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- 启动 mysql
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```bash
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systemctl start mysqld
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```
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- 查找 mysql 默认 root 密码
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```bash
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grep 'temporary password' /var/log/mysqld.log
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```
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- 修改 root 密码
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```bash
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mysqladmin -uroot -p password 'Pass-1234'
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# 输入查找到的密码
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```
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## CentOS7 安装 MySQL8 通用二进制包
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### 环境
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- CentOS 7.9 x86_64 最小安装
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- MySQL 8.0.28 多实例
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- 普通用户 mortal
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### 安装 mysql
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- 创建普通用户 mortal，切换到 mortal 用户下
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```bash
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useradd -m mortal
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su - mortal
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```
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- 下载 MySQL8 通用二进制包
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```bash
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cd ~
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curl -LO https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-8.0/mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
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```
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- 解压
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```bash
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cd ~
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tar xf mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
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mv mysql-8.0.28-linux-glibc2.12-x86_64 mysql
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```
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- 创建三个实例的目录
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```bash
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cd ~
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mkdir -p instance-{1..3}/{file,log}
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```
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- 创建各实例的配置文件 instance-{1..3}/my.cnf
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```bash
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cd ~
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for i in {1..3}; do
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cat > instance-$i/my.cnf <<-EOF
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[mysqld]
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mysqlx = OFF
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port = 330$i
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basedir = /home/mortal/mysql
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datadir = /home/mortal/instance-$i/db
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socket = /home/mortal/instance-$i/mysqld.sock
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pid-file = /home/mortal/instance-$i/mysqld.pid
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secure-file-priv = /home/mortal/instance-$i/file
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log-timestamps = SYSTEM
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log-error = /home/mortal/instance-$i/log/error.log
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slow-query-log = TRUE
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slow-query-log-file = /home/mortal/instance-$i/log/slow.log
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character-set-server = utf8mb4
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default-storage-engine = innodb
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#default-authentication-plugin = mysql_native_password
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authentication_policy = mysql_native_password
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lower-case-table-names = 1
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[client]
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socket = /home/mortal/instance-$i/mysqld.sock
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EOF
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done
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```
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### 初始化基础数据
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- 初始化每个实例的数据目录
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```bash
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cd ~
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mysql/bin/mysqld \
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--defaults-file=/home/mortal/instance-1/my.cnf \
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--initialize-insecure
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mysql/bin/mysqld \
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--defaults-file=/home/mortal/instance-2/my.cnf \
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--initialize-insecure
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mysql/bin/mysqld \
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--defaults-file=/home/mortal/instance-3/my.cnf \
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--initialize-insecure
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```
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### 启动 mysql
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- 启动每个实例的 mysql
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```bash
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cd ~
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mysql/bin/mysqld_safe \
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--defaults-file=/home/mortal/instance-1/my.cnf \
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&>> instance-1/log/mysqld_safe.out
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mysql/bin/mysqld_safe \
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--defaults-file=/home/mortal/instance-2/my.cnf \
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&>> instance-2/log/mysqld_safe.out
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mysql/bin/mysqld_safe \
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--defaults-file=/home/mortal/instance-3/my.cnf \
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&>> instance-3/log/mysqld_safe.out
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```
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### 设置 root 密码
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- 设置 mysql root 账户的密码
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```bash
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cd ~
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mysql/bin/mysqladmin \
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--defaults-file=/home/mortal/instance-1/my.cnf \
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password
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mysql/bin/mysqladmin \
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--defaults-file=/home/mortal/instance-2/my.cnf \
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password
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mysql/bin/mysqladmin \
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--defaults-file=/home/mortal/instance-3/my.cnf \
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password
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```
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### 客户端链接
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- 使用本机客户端链接 mysql
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```bash
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cd ~
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mysql/bin/mysql \
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--defaults-file=/home/mortal/instance-1/my.cnf \
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-uroot \
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-p
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mysql/bin/mysql \
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--defaults-file=/home/mortal/instance-2/my.cnf \
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-uroot \
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-p
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mysql/bin/mysql \
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--defaults-file=/home/mortal/instance-3/my.cnf \
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-uroot \
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-p
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```
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@ -1,58 +0,0 @@
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---
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title: "CentOS7 yum 安装 Mysql5.7"
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date: 2019-10-30T13:00:28+08:00
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lastmod: 2019-10-30T13:00:28+08:00
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tags: ["centos", "yum", "mysql"]
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categories: ["database"]
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---
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## 环境
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- CentOS 7.4 x86_64 最小安装
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- MySQL 5.7.20
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## 下载 mysql 源安装包
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```bash
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# repo 地址: https://repo.mysql.com/
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cd /root/
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curl -O https://repo.mysql.com/mysql57-community-release-el7.rpm
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```
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## 安装 mysql 源
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```bash
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rpm -ivh /root/mysql57-community-release-el7.rpm
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```
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## 更新 yum 缓存
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```bash
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yum clean all
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yum makecache fast
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```
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## 安装 mysql
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```bash
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yum install mysql-community-server
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```
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## 启动 mysql
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```bash
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systemctl start mysqld
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```
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## 查找 mysql 默认密码
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```bash
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grep 'temporary password' /var/log/mysqld.log
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mysql -uroot -p
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# 输入查找到的密码
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```
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## 修改 mysql 本地密码
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- 在 mysql 下修改
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```sql
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mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'Pass-1234';
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```
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- 或者直接在终端修改
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```bash
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mysqladmin -uroot -p password 'Pass-1234'
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```
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