mysql> show variables like '%ssl%';
+--------------------+-----------------+
| Variable_name      | Value           |
+--------------------+-----------------+
| have_openssl       | YES             |  
| have_ssl           | YES             |  # 已開啟ssl
| mysqlx_ssl_ca      |                 |
| mysqlx_ssl_capath  |                 |
| mysqlx_ssl_cert    |                 |
| mysqlx_ssl_cipher  |                 |
| mysqlx_ssl_crl     |                 |
| mysqlx_ssl_crlpath |                 |
| mysqlx_ssl_key     |                 |
| ssl_ca             | ca.pem          |
| ssl_capath         |                 |
| ssl_cert           | server-cert.pem |
| ssl_cipher         |                 |
| ssl_crl            |                 |
| ssl_crlpath        |                 |
| ssl_fips_mode      | OFF             |
| ssl_key            | server-key.pem  |
+--------------------+-----------------+
17 rows in set (0.56 sec)

mysql> select ssl_type from user where user = 'dev_fqr' ;
+----------+
| ssl_type |
+----------+
|          |
+----------+
1 row in set (0.05 sec)

alter user 'xxx'@'%' require ssl;
取消ssl驗(yàn)證:
alter user 'xxx'@'%' require none;

mysql> select ssl_type from user where user = 'dev_fqr' ;
+----------+
| ssl_type |
+----------+
| ANY      |
+----------+
1 row in set (0.01 sec)

[root@localhost data]# mysql -u dev_fqr -p
Enter password: 
ERROR 2026 (HY000): SSL connection error: SSL is required but the server doesn't support it

[root@localhost data]# mysql -udev_fqr -pDev@fqr2021 --ssl-ca=ca.pem --ssl-cert=client-cert.pem --ssl-key=client-key.pem
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 55
Server version: 8.0.22 MySQL Community Server - GPL
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
​
You are enforcing ssl connection via unix socket. Please consider
switching ssl off as it does not make connection via unix socket
any more secure.
mysql>