MySQL 使用绑定地址远程访问

Question

I am studying MySQL and trying to understand how bind-address works on version 8. Whenever I put bind-address= 127.0.0.1 / (local machine ip) and then:

CREATE USER 'test'@'other_machine_ip' IDENTIFIED WITH mysql_native_password BY 'xxxxxx';
GRANT ALL ON *.* TO 'test'@'other_machine_ip';

Other machine can connect remotely like this, but when I do bind-address=other_machine_ip the mysql doesn't start.

can anyone explain?

Answer 1

127.0.0.1 is a special IP Address owned by ALL IPv4 machines they use to talk to themselves , so it always refers to the local machine.

If you want machine A to talk to machine B then the IP Address you give to machine A must be the IP Address of machine B . If you tell machine A to connect to 127.0.0.1 , it will try & connect to itself.

The MySQL login you use from A will also need to be configured on B to be allowed to access the database from A , by setting up a password that allows this, eg

grant all privileges on ${DATABASE}.* to '${USERNAME}'@'${MACHINE-A}' identified by '${PASSWORD}'

(substitute as appropriate)

You also need to be able to route between the two. Check they can both ping each other.

MySQL will also need to be listening on port 3306 , as well as a local unix socket, eg by adding port=3306 into the [mysqld] section of my.cnf on the server, and in the [client] section of my.cnf on the client.

NOTE: MySQL does NOT perform well over long distance or high latency links. You will probably experience unexpectedly poor performance.