1、檢測系統是否已經安裝過mysql或其依賴，若已裝過要先將其刪除
首先需要先停止mysqld服務，否則直接卸載rpm包后，重新安裝的mysql沒有初始密碼
[root@node2 mysql-5.7.26]# systemctl stop mysqld [root@node2 mysql-5.7.26]# rpm -qa|grep mysql mysql-community-libs-5.7.26-1.el7.x86_64 mysql-community-common-5.7.26-1.el7.x86_64 mysql-community-client-5.7.26-1.el7.x86_64 mysql-community-server-5.7.26-1.el7.x86_64
[root@node2 mysql-5.7.26]# rpm -e mysql-community-server-5.7.26-1.el7.x86_64 [root@node2 mysql-5.7.26]# rpm -e mysql-community-client-5.7.26-1.el7.x86_64 [root@node2 mysql-5.7.26]# rpm -e mysql-community-libs-5.7.26-1.el7.x86_64 [root@node2 mysql-5.7.26]# rpm -e mysql-community-common-5.7.26-1.el7.x86_64
卸載順序為server->client->libs->common
將剩余mysql目錄刪除干凈
[root@node2 mysql-5.7.26]# find / -name mysql /etc/selinux/targeted/active/modules/100/mysql /var/lib/mysql /var/lib/mysql/mysql /usr/share/mysql [root@node2 mysql-5.7.26]# rm -rf var/lib/mysql [root@node2 mysql-5.7.26]# rm -rf /usr/share/mysql [root@node2 mysql-5.7.26]# rm -rf /var/log/mysqld.log
2、下載rpm包
mkdir /usr/local/src/mysql-5.7.26 cd /usr/local/src/ wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-server-5.7.26-1.el7.x86_64.rpm wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-client-5.7.26-1.el7.x86_64.rpm wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-common-5.7.26-1.el7.x86_64.rpm wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-libs-5.7.26-1.el7.x86_64.rpm
3、安裝rpm包
按照依賴順序依次安裝rpm包，依賴關系為common->libs->client->server
rpm -ivh mysql-community-common-5.7.26-1.el7.x86_64.rpm rpm -ivh mysql-community-libs-5.7.26-1.el7.x86_64.rpm rpm -ivh mysql-community-client-5.7.26-1.el7.x86_64.rpm rpm -ivh mysql-community-server-5.7.26-1.el7.x86_64.rpm
在安裝mysql-community-common-5.7.26-1.el7.x86_64.rpm ,可能會報錯：
file /usr/share/mysql/czech/errmsg.sys from install of mysql-community-common-5.7.26-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.60-1.el7_5.x86_64 file /usr/share/mysql/danish/errmsg.sys from install of mysql-community-common-5.7.26-1.el7.x86_64 conflicts with file from package mariadb-libs-1:5.5.60-1.el7_5.x86_64
提示是文件與mariadb-libs-1:5.5.60-1.el7_5.x86_64包里的沖突，卸載mariadb-libs-1:5.5.60-1.el7_5.x86_64即可
rpm -e mariadb-libs-1:5.5.60-1.el7_5.x86_64 --nodeps
4、驗證
[root@node2 mysql-5.7.26]# whereis mysql mysql: /usr/bin/mysql /usr/lib64/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz [root@node2 mysql-5.7.26]# whereis my.cnf my: /etc/my.cnf
編輯my.cnf
[mysqld] datadir=/home/mysql-5.7.26/data user=mysql symbolic-links=0 #server_id=71 #gtid_mode=on #開啟gtid模式 #enforce_gtid_consistency=on #強制gtid一致性 #log-bin=slave-71 #開啟二進制日志 #binlog_format=row log-error=/home/mysql-5.7.26/log/mysqld.log [mysqld_safe] log-error=/home/mysql-5.7.26/log/mysqld.log
建立相關目錄
[root@localhost mysql-5.7.26]# mkdir /home/mysql-5.7.26/ [root@localhost mysql-5.7.26]# mkdir /home/mysql-5.7.26/log [root@localhost mysql-5.7.26]# mkdir /home/mysql-5.7.26/data [root@localhost mysql-5.7.26]# chown -R mysql:mysql /home/mysql-5.7.26/
5、第一次啟動mysql服務
systemctl start mysqld [root@node2 src]# netstat -tunlp |grep 3306 tcp6 0 0 :::3306 :::* LISTEN 22905/mysqld
查看3306端口，啟動成功，查看第一次運行mysql時，系統分配的root賬號臨時密碼，在日志文件里搜索'temporary password'
[root@node3 mysql-5.7.26]# grep 'temporary password' /var/log/mysqld.log 2019-05-03T07:30:18.845325Z 1 [Note] A temporary password is generated for root@localhost: _:fwrY:W-8;l
6、利用密碼，啟動mysql客戶端並修改root賬號密碼
[root@node3 mysql-5.7.26]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.26 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>alter user 'root'@'localhost' identified by 'xxxxxxx'; Query OK, 0 rows affected (0.00 sec) mysql> quit
7、利用新密碼重新登錄mysql
[root@node3 mysql-5.7.26]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.7.26 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>
8、設置遠程連接權限
update user set host = ’%’ where user = ’root’; //出現報錯可以忽略 grant all privileges on *.* to root@'%' identified by "mypassword"; flush privileges;
9、查看結果
select host,user,password from user;