Linux 安装配置mysql57

Linux 安装配置mysql57

• 卸载Centos7自带的mariadb

  [root@node3 ~]# rpm -qa|grep mariadb
  mariadb-libs-5.5.64-1.el7.x86_64
  
  [root@node3 ~]# rpm -e mariadb-libs-5.5.64-1.el7.x86_64 --nodeps
  [root@node3 ~]# rpm -qa|grep mariadb                            
  [root@node3 ~]# 
  

• 安装mysql

  mkdir /export/software/mysql
  
  #上传mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar 到上述文件夹下  解压
  tar xvf mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar
  
  #执行安装
  yum -y install libaio
  
  [root@node3 mysql]# rpm -ivh mysql-community-common-5.7.29-1.el7.x86_64.rpm mysql-community-libs-5.7.29-1.el7.x86_64.rpm mysql-community-client-5.7.29-1.el7.x86_64.rpm mysql-community-server-5.7.29-1.el7.x86_64.rpm 
  
  warning: mysql-community-common-5.7.29-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
  Preparing...                          ################################# [100%]
  Updating / installing...
     1:mysql-community-common-5.7.29-1.e################################# [ 25%]
     2:mysql-community-libs-5.7.29-1.el7################################# [ 50%]
     3:mysql-community-client-5.7.29-1.e################################# [ 75%]
     4:mysql-community-server-5.7.29-1.e################                  ( 49%)
  

• mysql初始化设置

  #初始化
  mysqld --initialize
  
  #更改所属组
  chown mysql:mysql /var/lib/mysql -R
  
  #启动mysql
  systemctl start mysqld.service
  
  #查看生成的临时root密码
  cat  /var/log/mysqld.log
  
  [Note] A temporary password is generated for root@localhost:YtglEZyq#9dn
  

• 修改root密码 授权远程访问 设置开机自启动

  [root@node2 ~]# mysql -u root -p
  Enter password:     #这里输入在日志中生成的临时密码
  Welcome to the MySQL monitor.  Commands end with ; or \g.
  Your MySQL connection id is 3
  Server version: 5.7.29
  
  Copyright (c) 2000, 2020, 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> 
  
  
  #更新root密码  设置为hadoop
  mysql> alter user user() identified by "hadoop";
  Query OK, 0 rows affected (0.00 sec)
  
  
  #授权
  mysql> use mysql;
  
  mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'hadoop' WITH GRANT OPTION;
  
  mysql> FLUSH PRIVILEGES; 
  
  #mysql的启动和关闭 状态查看 （这几个命令必须记住）
  systemctl stop mysqld
  systemctl status mysqld
  systemctl start mysqld
  
  #建议设置为开机自启动服务
  [root@node2 ~]# systemctl enable  mysqld                             
  Created symlink from /etc/systemd/system/multi-user.target.wants/mysqld.service to /usr/lib/systemd/system/mysqld.service.
  
  #查看是否已经设置自启动成功
  [root@node2 ~]# systemctl list-unit-files | grep mysqld
  mysqld.service                                enabled 
  

• Centos7 干净卸载mysql 5.7

  #关闭mysql服务
  systemctl stop mysqld.service
  
  #查找安装mysql的rpm包
  [root@node3 ~]# rpm -qa | grep -i mysql      
  mysql-community-libs-5.7.29-1.el7.x86_64
  mysql-community-common-5.7.29-1.el7.x86_64
  mysql-community-client-5.7.29-1.el7.x86_64
  mysql-community-server-5.7.29-1.el7.x86_64
  
  #卸载
  [root@node3 ~]# yum remove mysql-community-libs-5.7.29-1.el7.x86_64 mysql-community-common-5.7.29-1.el7.x86_64 mysql-community-client-5.7.29-1.el7.x86_64 mysql-community-server-5.7.29-1.el7.x86_64
  
  #查看是否卸载干净
  rpm -qa | grep -i mysql
  
  #查找mysql相关目录 删除
  [root@node1 ~]# find / -name mysql
  /var/lib/mysql
  /var/lib/mysql/mysql
  /usr/share/mysql
  
  [root@node1 ~]# rm -rf /var/lib/mysql
  [root@node1 ~]# rm -rf /var/lib/mysql/mysql
  [root@node1 ~]# rm -rf /usr/share/mysql
  
  #删除默认配置 日志
  rm -rf /etc/my.cnf 
  rm -rf /var/log/mysqld.log