On a replication source server, you must enable binary logging and establish a unique server ID. If this has not already been done, a server restart is required.
Binary logging must be enabled on the
source because the binary log is the basis for replicating
changes from the source to its replicas. If binary logging is
not enabled using the
replication is not possible.
Each server within a replication group must be configured with a unique server ID. This ID is used to identify individual servers within the group, and must be a positive integer between 1 and (232)−1. How you organize and select the numbers is your choice.
To configure the binary log and server ID options, shut down the
MySQL server and edit the
my.ini file. Within the
[mysqld] section of the configuration file,
server-id options. If these options already
exist, but are commented out, uncomment the options and alter
them according to your needs. For example, to enable binary
logging using a log file name prefix of
mysql-bin, and configure a server ID of 1,
use these lines:
[mysqld] log-bin=mysql-bin server-id=1
After making the changes, restart the server.
If you do not set
(or set it explicitly to its default value of 0), the source
refuses any connections from replicas.
For the greatest possible durability and consistency in a
replication setup using
transactions, you should use
sync_binlog=1 in the source
Ensure that the
variable is not enabled on your replication source server. If
networking has been disabled, the replica can not communicate
with the source and replication fails.