Steps to restore master - master replication:

1. Stop traffic to db2 on the load balancer

2. (db1) stop slave;

3. (db2) stop slave;

4. (db1) show master status;

5. (db2) CHANGE MASTER TO master_host='db1', master_user='*****', master_password='*****', master_log_file='mysql-bin.000001', master_log_pos=106;

6. (db2) start slave;

7. (db2) show slave status\G

8. (db2) show master status;

9. (db1) CHANGE MASTER TO master_host='db2', master_user='*****', master_password='*****', master_log_file='mysql-bin.xxxxxx', master_log_pos=xxxxxx;

10. (db1) start slave;

11. (db1) show slave status\G

12. Start traffic to db2 on the load balancer