安装mysql报错源 “MySQL 5.7 Community Server“ 的 GPG 密钥已安装，但是不适用于此软件包。请检查源的公钥 URL 是否配置正确。 失败的软件包是：mysql-

安装mysql

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
yum localinstall mysql57-community-release-el7-8.noarch.rpm
yum install mysql-community-server

systemctl start mysqld
systemctl status mysqld

报错

源 "MySQL 5.7 Community Server" 的 GPG 密钥已安装，但是不适用于此软件包。请检查源的公钥 URL 是否配置正确。


 失败的软件包是：mysql-community-libs-5.7.44-1.el7.x86_64
 GPG  密钥配置为：file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

总计：222 M
Downloading packages:
warning: /var/cache/yum/x86_64/7/mysql57-community/packages/mysql-community-libs-5.7.44-1.el7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID 3a79bd29: NOKEY
从 file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql 检索密钥


源 "MySQL 5.7 Community Server" 的 GPG 密钥已安装，但是不适用于此软件包。请检查源的公钥 URL 是否配置正确。


 失败的软件包是：mysql-community-libs-5.7.44-1.el7.x86_64
 GPG  密钥配置为：file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

最终

[root@#localhost yiduoyun]# 
[root@#localhost yiduoyun]# systemctl start mysqld
[root@#localhost yiduoyun]# 
[root@#localhost yiduoyun]# systemctl status mysqld
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since 一 2024-01-15 22:46:29 CST; 25s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process: 3418 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
  Process: 3318 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
 Main PID: 3420 (mysqld)
   CGroup: /system.slice/mysqld.service
           └─3420 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid

1月 15 22:46:21 #localhost.localdomain
hadoop2 systemd[1]: Starting MySQL Server...
1月 15 22:46:29 #localhost.localdomain
hadoop2 systemd[1]: Started MySQL Server.
[root@#localhost yiduoyun]# 

参考
https://blog.csdn.net/qq_43408367/article/details/127299840

之后就可以正常进行下一步操作了
grep ‘temporary password’ /var/log/mysqld.log //会生成临时密码
mysql -uroot -p”sZlks?>yp2L>”

[root@#localhost yiduoyun]# grep 'temporary password' /var/log/mysqld.log        
2024-01-15T14:46:25.750530Z 1 [Note] A temporary password is generated for root@localhost: X)2SKfrUB!gM

取消mysql密码规范限制

set global validate_password_policy=0;
set global validate_password_length=1;

重设密码
alter user 'root'@'localhost' identified by '123456';	 
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
flush privileges;

退出mysql客户端，使用新密码重新登录
mysql -uroot -p123456

[root@#localhost yiduoyun]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.44

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

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> set global validate_password_policy=0;
Query OK, 0 rows affected (0.01 sec)

mysql> set global validate_password_length=1;
Query OK, 0 rows affected (0.00 sec)

mysql> alter user 'root'@'localhost' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.00 sec)

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

mysql> quit;
Bye
[root@#localhost yiduoyun]# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.44 MySQL Community Server (GPL)

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

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> quit;
Bye