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Linux(Centos 7) 安装 Mysql 5.7 步骤 配置过程

mysql技术 神游1214 110次浏览 已收录 0个评论

一、检查是否已经安装了mysql

 [root@localhost /]# rpm -qa | grep -i mysql

如果有,则使用删除语句删除

 [root@localhost /]# yum -y remove mariadb-libs-5.5.56-2.el7.x86_64

再使用查询命令,查找mysql相关的文件

 [root@localhost /]# find / -name mysql

然后把存在的文件都删除

 [root@localhost /]# rm –rf {目录名}

二、下载mysql安装包

进入包下载所放位置下载

 [root@localhost /]# cd /usr/local/src
 [root@localhost src]# wget  https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

进行解压

     [root@localhost src]# tar zxvf mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz 
     [root@localhost src]# ls
mysql-5.7.25-linux-glibc2.12-x86_64  mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz   

移位置并改名

     [root@localhost src]# mv mysql-5.7.25-linux-glibc2.12-x86_64 /usr/local/mysql

      [root@localhost src]# cd /usr/local/mysql
  [root@localhost mysql]# ls
   bin  COPYING    docs  include  lib  man  README  share  support-files

三、配置初始化mysql

添加用户组和新用户名

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

创建data目录

     [root@localhost mysql]# mkdir data

修改mysql目录用户为刚刚新建的mysql组中的mysql用户

       [root@localhost mysql]# chown -R mysql:mysql ./  

安装必要文件包

        [root@localhost mysql]# yum install -y libaio

初始化安装mysql数据库

  [root@localhost mysql]#./bin/mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --initialize          

 2019-07-07T07:51:36.066665Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-07-07T07:51:37.197916Z 0 [Warning] InnoDB: New log files created, LSN=45790
2019-07-07T07:51:37.299392Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2019-07-07T07:51:37.823229Z 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: 0c916440-a08c-11e9-87be-000c2954a0d9.
2019-07-07T07:51:37.846198Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2019-07-07T07:51:37.847191Z 1 [Note] A temporary password is generated for root@localhost: yrntyj)qo6Nd

修改my.cnf配置文件,从版本5.7.18开始,mysql免安装二进制包中就不包含该文件了,即不需要my.cnf文件也可以正常运行;my.conf文件中配置的选项会在命令行启动mysql的时候作为参数进行启动,为了后面搭建mysql主从环境方便,下面可以添加了一个简单的my.cnf文件作为实例(如果只是单纯的搭建一个mysql实例,可以直接忽略此步骤),使用vim /etc/my.cnf命令,如果在该目录上不存在则会新建

           [mysqld]
      datadir=/data/mysql/data
      socket=/tmp/mysql.sock

     [mysqld_safe]
     log-error=/var/log/mysqld.log
      pid-file=/usr/local/mysql/data/mysqld.pid

四、其他配置

添加开机启动

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

修改mysqld,使用vim /etc/init.d/mysqld 命令 修改以下代码部分

             basedir=/usr/local/mysql
       datadir=/usr/local/mysql/data

设置开机启动

      [root@localhost mysql]# chkconfig --add mysqld

为了可以在任意目录上都可以使用mysql命令登录mysql,将mysql安装目录配置到环境变量中,在/etc/profile文件的末尾添加以下代码

        export PATH=$PATH:/usr/local/mysql/bin    

使配置文件的配置立即生效

        [root@localhost mysql]# source /etc/profile    

重启mysql服务,并且使用mysql的root用户登录mysql

           [root@localhost mysql]# service mysqld restart
    Shutting down MySQL.... SUCCESS! 
    Starting MySQL.. SUCCESS! 
      [root@localhost mysql]# mysql -uroot -p
     Enter password: 
     Welcome to the MySQL monitor.  Commands end with ; or \g.
     Your MySQL connection id is 2
   Server version: 5.7.25 MySQL Community Server (GPL)

    Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

     Oracle is a registered trademark of Oracle Corporation and/or its
     affiliates. Other names may be trademarks of their respective
     owners.

  Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

  mysql> 

修改root用户的密码为root,并且刷新

    mysql> alter user 'root'@'localhost' identified by 'root';
Query OK, 0 rows affected (0.00 sec)

  mysql> flush privileges;
 Query OK, 0 rows affected (0.00 sec)

此时mysql数据库只能在本机上使用mysql命令进行登录,还无法使用navicat等数据库可视化工具进行远程登录,下面设置允许root用户远程连接数据库

      mysql> use mysql;
    Reading table information for completion of table and column names
 You can turn off this feature to get a quicker startup with -A

     Database changed
  mysql> update user set user.Host='%' where user.User='root';
 Query OK, 1 row affected (0.01 sec)
 Rows matched: 1  Changed: 1  Warnings: 0

    mysql> flush privileges;
 Query OK, 0 rows affected (0.00 sec)

    mysql> exit
Bye

查看防火墙

        [root@localhost mysql]# firewall-cmd --state
  running     

打开3306端口

        [root@localhost mysql]# firewall-cmd --zone=public --add-port=3306/tcp --permanent

success

防火墙重启

         [root@localhost mysql]# firewall-cmd --reload

success

至此,可以直接使用navicat等连接数据库


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