问题
I've been trying to set up two databases as master & slave.
I followed the famous guide here: https://dev.mysql.com/doc/refman/5.1/en/replication-howto-existingdata.html
But no luck on my slave server,
The issue I'm having is setting the server-id variable.
No matter where I define it (I looked into all the possible cnf files that might allow me to define the variable)
I tried to define it like so:
[mysqld]
server-id = 2
I also tried setting it by using SET GLOBAL server_id but obviously, it didn't save the setting.
when I do:
SHOW VARIABLES LIKE 'server_id'
It returns
server_id 0
Among the cnf files I've looked into are:
etc/mysql/mysql.conf.d/mysqld.cnf
etc/mysql/mysql.conf.d/mysqld_safe_syslog.cnf
etc/mysql/conf.d/mysql.cnf
etc/mysql/debian.cnf
etc/mysql/mysql.cnf
usr/my.cnf
usr/my-new.cnf
usr/etc/my.cnf
My MySQL server is running on Ubuntu. And if it matters, I start it by typing:
service mysql start
I'd love to know where else I could look to fix this issue. Thanks a bunch!
Additional Notes:
MySQL Ignoring the global conf file
I received this warning a couple of times and it disappeared when I returned the chmod to 644 on the etc/mysql folder, although every thing stated above was attempted using both 644 and 777 permissions, with 644 the warning disappears.
回答1:
I know it's to late, but for those who will make the mistake. It's server_id and not server-id:
[mysqld]
server_id = 2
来源：https://stackoverflow.com/questions/33328652/setting-server-id-variable-in-mysql-doesnt-work