centos7, centos8 安装mysql5.7
作者:互联网
1. 下载mysql软件包
我们可以先去官网查看我们应该下载哪个版本
网址: https://downloads.mysql.com/archives/community/
然后到镜像网站去下载,速度会快很多,例如,清华大学镜像网站,下载5.7版本的软件包:
wget https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-5.7/mysql-5.7.33-el7-x86_64.tar.gz
2. 解压
cd /feng tar -zxvf mysql-5.7.33-el7-x86_64.tar.gz # 解压目录过长,可以建个软链接,或者改名字 ln -s mysql-5.7.33-el7-x86_64 ./mysql
3. 配置
出于安全考虑,应该避免用root用户启动mysql,所以要创建一个mysql的启动用户
groupadd dbAdmin ## -r 代表建立一个系统用户,不会创建家目录,-g 指定用户组 ## 建议使用man 命令查看 命令详情 useradd -r -g dbAdmin dbAdmin
创建mysql 数据目录,赋予dbAdmin 用户权限
mkdir -p /feng/data/mysql chown -R dbAdmin:dbAdmin /feng/data/mysql
第二步 解压的安装包,也要赋予权限
编写配置文件: vi /etc/my.cnf
[mysqld] bind-address=0.0.0.0 port=3306 user=dbAdmin basedir=/feng/mysql datadir=/feng/data/mysql socket=/feng/mysql/mysql.sock pid-file=/feng/mysql/mysqld.pid log-error=/var/log/mysqld.log #character config character_set_server=utf8mb4 symbolic-links=0 explicit_defaults_for_timestamp=true [client] port=3306 socket=/feng/mysql/mysql.sock
创建上述配置中的文件, 授予dbAdmin 权限
touch /feng/mysql/mysql.sock touch /feng/mysql/mysqld.pid touch /var/log/mysqld.log
4. 初始化
cd /feng/mysql/bin
./mysqld --defaults-file=/etc/my.cnf --basedir=/feng/mysql/ --datadir=/feng/data/mysql --user=dbAdmin --initialize
初始化成功后,会有初始密码在日志文件里
cat /var/log/mysqld.log |grep "password" 2021-02-21T02:07:12.865619Z 1 [Note] A temporary password is generated for root@localhost: jrwb>b?AX18l
5. 启动
bin/mysqld_safe --defaults-file=/etc/my.cnf --user=dbAdmin &
6. 客户端连接
bin/mysql -u root -p
遇到以下报错及解决方法:
登录成功后。修改密码:
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('yourpasswd');
7 其他
Failed to restart mysqld.service: Unit mysqld.service not found.
[root@localhost mysql]# service mysqld restart Redirecting to /bin/systemctl restart mysqld.service Failed to restart mysqld.service: Unit mysqld.service not found.
[root@localhost mysql]# cp support-files/mysql.server /etc/init.d/mysql
使用DataGrip 连接时报错如下,说明mysql 没有允许其他客户端连接,只能localhost连接
[HY000][1130] null, message from server: "Host '192.168.31.62' is not allowed to connect to this MySQL server".
解决如下:
update user set host = '%' where user = 'root';
标签:feng,dbAdmin,log,--,mysql5.7,centos7,mysqld,mysql,centos8 来源: https://www.cnblogs.com/fhb2011/p/14444436.html