问题描述
使用非root安装mysql，使用 mysqld 初始化数据库时，不想使用/etc/my.cnf作为启动配置文件，而是指定自定义的my.cnf文件，在执行时，遇到[ERROR] unknown variable 'defaults-file=/data/infra/mysql/conf/my.cnf' 错误。
执行的命令： ./bin/mysqld --initialize-insecure --user=ftops --defaults-file=/data/infra/mysql/conf/my.cnf --basedir=/data/infra/mysql --datadir=/data/infra/mysql/data --socket=/data/infra/mysql/tmp/mysql.sock
[ftops@ft-d-0192168016209 mysql]$ ./bin/mysqld --initialize-insecure --user=ftops --defaults-file=/data/infra/mysql/conf/my.cnf --basedir=/data/infra/mysql --datadir=/data/infra/mysql/data --socket=/data/infra/mysql/tmp/mysql.sock
2024-03-20T01:55:15.764417Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2024-03-20T01:55:15.891443Z 0 [Warning] InnoDB: New log files created, LSN=45790
2024-03-20T01:55:15.918429Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2024-03-20T01:55:15.973263Z 0 [ERROR] unknown variable 'defaults-file=/data/infra/mysql/conf/my.cnf'
2024-03-20T01:55:15.973273Z 0 [ERROR] Aborting
[ftops@ft-d-0192168016209 mysql]$ rm -rf data/
[ftops@ft-d-0192168016209 mysql]$
原因
这个是mysql 的一个bug，使用指定路径的my.cnf,而不用默认的/etc/my.cnf文件，需要在启动时，将--default-file=***/my.cnf 参数放在命令后的第一位参数传入，如果是作为命令第二、第三位，就会出现上述错误。
错误的示范：./mysqld --initialize-insecure --defaults-file=/data/infra/mysql/conf/my.cnf
正确的示范：./mysqld --defaults-file=/data/infra/mysql/conf/my.cnf --initialize-insecure
参考：https://www.cnblogs.com/qiumingcheng/p/11191759.html
问题解决
将--defaults-file参数调整到命令第一位，即可解决。
示例：./bin/mysqld --defaults-file=/data/infra/mysql/conf/my.cnf --initialize-insecure --user=ftops --basedir=/data/infra/mysql --datadir=/data/infra/mysql/data --socket=/data/infra/mysql/tmp/mysql.sock
[ftops@ft-d-0192168016209 mysql]$ ./bin/mysqld --defaults-file=/data/infra/mysql/conf/my.cnf --initialize-insecure --user=ftops --basedir=/data/infra/mysql --datadir=/data/infra/mysql/data --socket=/data/infra/mysql/tmp/mysql.sock
2024-03-20T01:56:38.815353Z 0 [Warning] InnoDB: New log files created, LSN=45790
2024-03-20T01:56:38.842167Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2024-03-20T01:56:38.899853Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 171a1d3a-e65d-11ee-be91-faa23b88c700.
2024-03-20T01:56:38.900679Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2024-03-20T01:56:40.116747Z 0 [Warning] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher.
2024-03-20T01:56:40.116759Z 0 [Warning] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher.
2024-03-20T01:56:40.119760Z 0 [Warning] CA certificate ca.pem is self signed.
2024-03-20T01:56:40.300626Z 1 [Warning] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.