Google Cloud MySQL 和 Master-master 复制

Question

I have two servers in different regions ( eu , us ) connected to the same mysql database, I've started with google cloud sql second generation but it's only available on us region.

The idea is to add a second sql nodes in the new region eu but I can't find any documentation about Master-Master replication so it is not supported at this time. Is this correct?

ps. both of my servers need read/write access.

With my operational google sql in us , can I just:

1. I create a new google sql cloud in eu .

2. Configure eu as an External Replicas for us .

3. Configure eu as External Masters for us .

I'm really confused! Any help will be appreciated.

/Ouss

Answer 1

Google Cloud SQL 不支持 Master-Master。

Answer 2

Solution from: https://www.ryadel.com/en/mysql-master-master-replication-setup-in-5-easy-steps/

Successfully implemented on Linux Ubuntu 16.04 in google cloud platform MySql 5.7 will not load on Debian.

/// Install MySQL on 2 VMs

A. On VMs sql1 & sql2

apt update
apt install mysql-server -y

P@ssW0rd2020    P@ssW0rd2020

B. Comment bind-address to allow global access

cd /etc/mysql/mysql.conf.d/

nano /etc/mysql/mysql.conf.d/mysqld.cnf

C. Restart MySQL Service (cnf changed)

systemctl restart mysql
systemctl status mysql

D. On sql1

nano /etc/mysql/conf.d/mysql.cnf

[mysqld]   // note: not [mysql]

server-id=1
log-bin="mysql-bin"
binlog-ignore-db=test
binlog-ignore-db=information_schema
replicate-ignore-db=test
replicate-ignore-db=information_schema
relay-log="mysql-relay-log"
auto-increment-increment = 2
auto-increment-offset = 1

-------------------------------------

systemctl restart mysql
systemctl status mysql

D. On sql2

nano /etc/mysql/conf.d/mysql.cnf

[mysqld]

server-id=2
log-bin="mysql-bin"
binlog-ignore-db=test
binlog-ignore-db=information_schema
replicate-ignore-db=test
replicate-ignore-db=information_schema
relay-log="mysql-relay-log"
auto-increment-increment = 2
auto-increment-offset = 2

-------------------------------------

systemctl restart mysql (THIS WILL CREATE BIN LOG)
systemctl status mysql

again, flush privileges; ---supposed to 

E. Create the Replicator User(s)

• Configure on both sql1 & 2 (replicator password can be same for, or not)

  mysql -u root -p

  P@ssW0rd2020

  CREATE USER 'replicator'@'%' IDENTIFIED BY 'P@ssW0rd2020'; GRANT REPLICATION SLAVE ON . TO 'replicator'@'%' IDENTIFIED BY 'P@ssW0rd2020'; flush privileges;

F. Start with fresh VMs with no databases (better) or mutual import/export databases into sql1 & 2 https://dev.mysql.com/doc/refman/8.0/en/copying-databases.html

G. Configure replication from sql1 to sql2 (make sql2 slave of sql1)

• On sql1

  SHOW MASTER STATUS;

  example output: +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000001 | 448 |example | test, informatio | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)

  • NOTE 'file' and 'position' values

• On sql2

  STOP SLAVE; CHANGE MASTER TO MASTER_HOST = '104.154.225.215', MASTER_USER = 'replicator', MASTER_PASSWORD = 'P@ssW0rd2020', MASTER_LOG_FILE = 'mysql-bin.000001', MASTER_LOG_POS = 448; START SLAVE; flush privileges;

H. Repeat for sql2 (make sql1 slave of sql2)

• on sql2

  SHOW MASTER STATUS;

  example output: +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000001 | 448 |example | test, informatio | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)

  • NOTE 'file' and 'position' values

• On sql1

  STOP SLAVE; CHANGE MASTER TO MASTER_HOST = '35.198.195.130', MASTER_USER = 'replicator', MASTER_PASSWORD = 'P@ssW0rd2020', MASTER_LOG_FILE = 'mysql-bin.000001', MASTER_LOG_POS = 448; START SLAVE;

I. Test the Replication

• Create a database on sql1 it will be replicated on sql2, vice versa.
• Create a database on sql2 it will be replicated on sql1, vice versa.

SUCCESS IS SWEET! 🤓