CentOS7.4下MySQL5.7.28二进制方式安装的方法步骤

linux系统版本：centos7.4

mysql版本：5.7.28

在linux平台有rpm包、二进制包、源码包3中安装方式，这一篇文章主要是以rpm包为例来介绍如何在linux平台下进行mysql的安装。

下载地址：

https://cdn.mysql.com//downloads/mysql-5.7/mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz

具体安装步骤如下：

（1）首先卸载mariadb，不然后面会和安装mysql需要的库冲突：

[root@localhost ~]# rpm -qa | grep mariadb
mariadb-libs-5.5.56-2.el7.x86_64
[root@localhost ~]# rpm -e --nodeps mariadb-libs-5.5.56-2.el7.x86_64

（2）用root用户登录系统，增加mysql用户和组，数据库安装在此用户下：

[root@localhost ~]# groupadd mysql
[root@localhost ~]# useradd -r -g mysql -s /bin/false mysql

（3）准备数据目录

以/app/data为例,建议使用逻辑卷

[root@localhost ~]# mkdir -p /app/data
[root@localhost ~]# chown mysql.mysql /app/data/
[root@localhost ~]# chmod 750 /app/data

（4）准备二进制文件：

[root@localhost ~]# tar xvf mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz -c /usr/local/
root@localhost ~]# cd /usr/local
[root@localhost local]# ln -sv mysql-5.7.28-linux-glibc2.12-x86_64 mysql
‘mysql' -> ‘mysql-5.7.28-linux-glibc2.12-x86_64'

（5）初始化mysql：

[root@localhost ~]# cd /usr/local/mysql
[root@localhost mysql]# bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/app/data
2019-11-03t09:47:18.263716z 0 [warning] timestamp with implicit default value is deprecated. please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-11-03t09:47:19.059462z 0 [warning] innodb: new log files created, lsn=45790
2019-11-03t09:47:19.140866z 0 [warning] innodb: creating foreign key constraint system tables.
2019-11-03t09:47:19.207569z 0 [warning] no existing uuid has been found, so we assume that this is the first time that this server has been started. generating a new uuid: ed1cd8ec-fe1e-11e9-8c9c-000c29f8617a.
2019-11-03t09:47:19.209181z 0 [warning] gtid table is not ready to be used. table 'mysql.gtid_executed' cannot be opened.
2019-11-03t09:47:19.646366z 0 [warning] ca certificate ca.pem is self signed.
2019-11-03t09:47:20.056792z 1 [note] a temporary password is generated for root@localhost: ry-6f??#!<zo

其中--basedir mysql基础目录 --datadir mysql数据存放目录，并创建了root用户的临时密码：ry-6f??#!<zo

（6）开启ssl连接：

[root@localhost mysql]# bin/mysql_ssl_rsa_setup
2019-11-03 23:09:55 [error]  failed to access directory pointed by --datadir. please make sure that directory exists and is accessible by mysql_ssl_rsa_setup. supplied value : /usr/local/mysql/data
[root@localhost mysql]# bin/mysql_ssl_rsa_setup --datadir=/app/data

命令后面不加参数报错，加了--datadir后不报错

（7）编辑配置文件，保存退出：

[root@localhost mysql]# vim /etc/my.cnf
[mysqld]
# general
datadir=/app/data
socket=/app/data/mysql.sock
user=mysql
default-storage-engine=innodb

[mysqld_safe]
log-error=/app/data/mysql-error.log
pid-file=/app/data/mysqld.pid

[client]
socket=/app/data/mysql.sock

（8）启动mysql：

[root@localhost mysql]# bin/mysqld_safe --user=mysql &

（9）配置环境变量：

[root@localhost ~]# vim /etc/profile
#添加下面一行
export path=$path:/usr/local/mysql/bin
[root@localhost ~]# source /etc/profile

（10）设置开机启动：

[root@localhost mysql]# cp support-files/mysql.server /etc/init.d/mysql.server
[root@localhost mysql]# chkconfig --add mysql.server

（11）测试登录成功：

[root@localhost ~]# mysql -uroot -p
enter password:
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 2
server version: 5.7.28

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