Documentation Home
MySQL 5.7 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 37.9Mb
PDF (A4) - 38.0Mb
PDF (RPM) - 36.5Mb
HTML Download (TGZ) - 9.9Mb
HTML Download (Zip) - 9.9Mb
HTML Download (RPM) - 8.7Mb
Man Pages (TGZ) - 210.0Kb
Man Pages (Zip) - 319.1Kb
Info (Gzip) - 3.5Mb
Info (Zip) - 3.5Mb
Excerpts from this Manual

16.1.2.2 Creating a User for Replication

Each slave connects to the master using a MySQL user name and password, so there must be a user account on the master that the slave can use to connect. The user name is specified by the MASTER_USER option on the CHANGE MASTER TO command when you set up a replication slave. Any account can be used for this operation, providing it has been granted the REPLICATION SLAVE privilege. You can choose to create a different account for each slave, or connect to the master using the same account for each slave.

Although you do not have to create an account specifically for replication, you should be aware that the replication user name and password are stored in plain text in the master info repository file or table (see Section 16.2.4.2, “Slave Status Logs”). Therefore, you may want to create a separate account that has privileges only for the replication process, to minimize the possibility of compromise to other accounts.

To create a new account, use CREATE USER. To grant this account the privileges required for replication, use the GRANT statement. If you create an account solely for the purposes of replication, that account needs only the REPLICATION SLAVE privilege. For example, to set up a new user, repl, that can connect for replication from any host within the example.com domain, issue these statements on the master:

mysql> CREATE USER 'repl'@'%.example.com' IDENTIFIED BY 'password';
mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%.example.com';

See Section 13.7.1, “Account Management Statements”, for more information on statements for manipulation of user accounts.


User Comments
User comments in this section are, as the name implies, provided by MySQL users. The MySQL documentation team is not responsible for, nor do they endorse, any of the information provided here.
Sign Up Login You must be logged in to post a comment.