├── README.md
└── Re-SyncMysqlMasterSlaveReplication.sh


/README.md:
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 1 | # Re-SyncMysqlMasterSlaveReplication
 2 | How to Reset (Re-Sync) MySQL Master-Slave Replication
 3 | 
 4 | Prerequisites:
 5 | 
 6 | 1) this tool must be run on master server
 7 | 
 8 | 2) ssh access to both servers (master & slave)
 9 | 
10 | 2) ssh access from master to slave using ssh without pass (google: ssh without password)
11 | 	
12 | 	Some help at this point.
13 | 	Use ssh to login to your server under the account name you want to use. 
14 | 	When prompting for passphrase hit enter.
15 | 	
16 | 	Steps:
17 | 	
18 | 	On master server:
19 | 
20 | 		root@master-server$ cd ~/.ssh
21 | 		root@master-server$ ssh-keygen
22 | 		root@master-server$ ssh-copy-id -i ~/.ssh/id_rsa.pub slave-server
23 | 		# test connection
24 | 		root@master-server$ ssh slave-server
25 | 		
26 | 	If do not work, please google for some tutorial
27 | 
28 | 


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/Re-SyncMysqlMasterSlaveReplication.sh:
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 1 | #######################################################################
 2 | # Developer: Maykel Curbelo Pruna                                     #
 3 | # Email: mcurbelop@gmail.com                                          #
 4 | # Date: 03/02/2015, Version: 1.0                                      #
 5 | # Important:                                                          #
 6 | #   1) Use this code at your own risk                                 #
 7 | #   1) Test first on development environment                          #
 8 | #   2) Make a backup of your database before using this code          #
 9 | #######################################################################
10 | 
11 | ############ Configuration section, change everything you need #########################
12 | 
13 | DB_NAME="db_name"
14 | 
15 | SLAVE="full_dns_or_IP_slave_server"
16 | SLAVE_USER="mysql_user_slave_server"
17 | SLAVE_PASS="mysql_password_slave_server"
18 | 
19 | MASTER="full_dns_or_IP_master_server"
20 | MASTER_USER="mysql_user_master_server"
21 | MASTER_PASS="mysql_password_master_server"
22 | 
23 | TEMPORAL_WORKING_PATH="/root"
24 | 
25 | 
26 | 
27 | ############ I suggest you do not change anything after here #########################
28 | 
29 | DATE_TIME=`date +%Y-%m%-d-%H-%M-%S`
30 | DUMPED_DB_PATH="$TEMPORAL_WORKING_PATH/$DB_NAME.sql_$DATE_TIME"
31 | 
32 | echo -e "\nMaking backup of db: $DB_NAME\n"
33 | ssh $SLAVE "mysqldump -u $SLAVE_USER -p$SLAVE_PASS $DB_NAME > $DUMPED_DB_PATH"
34 | echo "We make a backup of your database (DB_NAME) on $DUMPED_DB_PATH"
35 | 
36 | echo -e "\nStoping SLAVE ($SLAVE)\n"
37 | ssh $SLAVE "mysql -u $SLAVE_USER -p$SLAVE_PASS -e 'STOP SLAVE;'"
38 | 
39 | echo -e "\nReset & Flush master\n"
40 | mysql -u $MASTER_USER -p$MASTER_PASS -e 'RESET MASTER;'
41 | mysql -u $MASTER_USER -p$MASTER_PASS -e 'FLUSH TABLES WITH READ LOCK;'
42 | 
43 | echo -e "\nDumping $DB_NAME on $MASTER\n"
44 | mysqldump -u $MASTER_USER -p$MASTER_PASS $DB_NAME > /tmp/$DB_NAME.sql
45 | 
46 | echo -e "\nUnlock the tables at master ($MASTER)\n"
47 | mysql -u $MASTER_USER -p$MASTER_PASS -e 'UNLOCK TABLES;'
48 | 
49 | echo -e "\nCopying dumped db to SLAVE ($SLAVE) \n"
50 | rsync -avz /tmp/$DB_NAME.sql $SLAVE:/tmp/$DB_NAME.sql
51 | 
52 | echo -e "\nRestoring DB ($DB_NAME) on SLAVE ($SLAVE)\n"
53 | ssh $SLAVE "/usr/bin/mysql -u $SLAVE_USER -p$SLAVE_PASS $DB_NAME < /tmp/$DB_NAME.sql"
54 | 
55 | echo -e "\nReset SLAVE & Change master_log_file to pos 1\n"
56 | ssh $SLAVE "mysql -u $SLAVE_USER -p$SLAVE_PASS -e 'RESET SLAVE;'"
57 | ssh $SLAVE "mysql -u $SLAVE_USER -p$SLAVE_PASS -e 'CHANGE MASTER TO MASTER_LOG_FILE='\''mysql-bin.000001'\'', MASTER_LOG_POS=1;'"
58 | ssh $SLAVE "mysql -u $SLAVE_USER -p$SLAVE_PASS -e 'START SLAVE;'"
59 | 
60 | echo -e "\n\nAll Done !!\n\n"
61 | 


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