keepalived+mysql

Keepalived is a software that provides high availability and load balancing for Linux systems. It works by monitoring the health of servers and automatically redirecting traffic to healthy servers in case of failure. MySQL is an open-source relational database management system that is widely used in web applications. When combined, Keepalived and MySQL can provide a highly available and scalable database solution.

To set up Keepalived with MySQL, you need to have at least two MySQL servers running on different machines. Keepalived should be installed on both machines. The first step is to configure Keepalived to monitor the health of the MySQL servers. This can be done by setting up a health check script that checks the status of the MySQL service.

Once the health check is configured, Keepalived can be set up to redirect traffic to the healthy MySQL server. This can be done by configuring virtual IP addresses (VIPs) that are managed by Keepalived. The VIPs are assigned to the active MySQL server, and if the active server fails, the VIP is moved to the standby server.

To ensure data consistency between the MySQL servers, you can use MySQL replication. This involves setting up a master-slave configuration where one MySQL server acts as the master and the other as the slave. The master server replicates its data to the slave server in real-time, ensuring that both servers have the same data.

Overall, Keepalived and MySQL can provide a highly available and scalable database solution for web applications. By using Keepalived to monitor the health of MySQL servers and redirect traffic to healthy servers, and using MySQL replication to ensure data consistency, you can ensure that your database is always available and can handle high traffic loads.