Differences

This shows you the differences between two versions of the page.

--- mysql:changemasters [2015/06/24 18:27] – rlunaro
+++ mysql:changemasters [2015/06/24 18:59] – rlunaro
@@ Line 79: / Line 79: @@
 And now we want this:
-{{ :mysql:20150623_mysql_step_2.png?200 |}}
+{{:mysql:20150623_mysql_step_3.png?200|}}
 For that, we have to:
@@ Line 87: / Line 87: @@
   - issue a [[https://dev.mysql.com/doc/refman/5.0/en/replication-solutions-switch.html|change master to]] command to the old slave
+==== Stop the master ====
+Nothing new under the sun:
-This explains how to change the master of a running mysql database by the mechanism of:
+<code>
+/etc/rc.d/mysql stop
+</code>
-  - Create a new slave wihtout downtime
+or:
-  - Stop the current master and start a new master (the last slave)
+<code>
+net stop mysql
+</code>
+==== Check that both slaves are up-to-date ====
+Among the information that ''show slave status\G'' displays, I've chosen Read_Master_Log_Pos to make sure
+both database servers are in the same position.
+==== Create (if it does not exist) a replication user in future-master ====
+<code>
+grant replication slave, replication client on *.* to YOUR-REPLICATION-USERNAME identified by 'YOUR-REPLICATION-PASSWORD';
+</code>
+==== Issue a change master command ====
+In the slave server I've issued a ''change master to'' command:
+<code>
+stop slave;
+change master to master_host='future-master',
+master_port=3306,
+master_user='YOUR-REPLICATION-USERNAME',
+master_password='YOUR-REPLICATION-PASSWORD';
+</code>
+And I've stopped and started the slave.
-https://dev.mysql.com/doc/refman/5.0/en/replication-solutions-switch.html