High availability solution: Using Nginx Proxy Manager to implement database master-slave replication

High availability solution: Using Nginx Proxy Manager to implement database master-slave replication

Introduction
High availability is a very important requirement in modern enterprises. In online applications, database plays a vital role. In order to ensure the integrity and reliability of the data, we need to take some measures to ensure the high availability of the database. This article will introduce a solution using Nginx Proxy Manager to implement database master-slave replication, and provide specific code examples.

1. What is database master-slave replication?
   Database master-slave replication is a commonly used high availability solution. It records database operation logs on the master database, then transmits the logs to the slave database, and then the slave database applies these logs to its own database to achieve data synchronization between the master database and the slave database.
2. Nginx Proxy Manager
   Nginx Proxy Manager is a high availability solution based on Nginx. It can distribute traffic through reverse proxy and load balancing to achieve high availability and performance. In our solution, we will use Nginx Proxy Manager to handle high availability of the database.
3. Solution Overview
   Our solution will configure two database instances: a master database and a slave database. The master database will receive all write operations and send the operation log to the slave database. The slave database will read the operation log of the master database and apply it to its own database to achieve data synchronization.
4. Configuring the master database
   First, we need to enable binary logging in the master database. In the MySQL configuration file, set the following:

[mysqld]
log-bin = /var/log/mysql/mysql-bin.log
server-id = 1

Then, restart the main database for the configuration to take effect.

5. Configuring the slave database
   Before configuring the slave database, please make sure that you have installed MySQL and stopped the MySQL service.

First, we need to configure the replication parameters from the database. In the MySQL configuration file, set the following content:

[mysqld]
server-id = 2
relay-log = /var/log/mysql/mysql-relay-bin.log
log_slave_updates = 1
read_only = 1

Then, start the slave database and execute the following SQL statement:

CHANGE MASTER TO MASTER_HOST='主数据库IP地址', MASTER_USER='复制用户', MASTER_PASSWORD='复制用户密码', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=107;

Note that the parameters in the above statement are replaced with your own parameters .

6. Configuring Nginx Proxy Manager
   Now, we will configure Nginx Proxy Manager to proxy the master database and slave database. In the configuration file of Nginx Proxy Manager, add the following content:

upstream db_servers {
    server 主数据库IP地址;
    server 从数据库IP地址 backup;
}

server {
    listen 3306;
   
    location / {
        proxy_pass http://db_servers;
        #下面是其他的Nginx配置
    }
}

Then, restart Nginx Proxy Manager to make the configuration take effect.

7. Test high availability
   At this point, you have successfully configured the database master-slave replication and Nginx Proxy Manager. To test high availability, you can try writing operations on the master database and then reading operations on the slave database to ensure that the data is synchronized correctly.

Conclusion
Through the above configuration, we successfully implemented master-slave replication of the database and used Nginx Proxy Manager to achieve high availability. This solution ensures fast database switching and data reliability in the event of a database failure. Hope this article helps you!

References:
[1] MySQL Documentation. Replication. [Link]
[2] Nginx Documentation. Proxying TCP and UDP Load Balancing. [Link]

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