What are the differences between haproxy and keepalived?
Haproxy and Keepalived are two commonly used load balancing software with the following differences:
- Function: Haproxy is a high-performance load balancing software that distributes requests to multiple backend servers based on different algorithms. It also offers features such as session persistence and health checks. Keepalived is a high availability software that monitors the operating status of services and automatically switches to a backup server if the primary server fails.
- Setup: Haproxy is a standalone software that needs to be installed on each load balancing server. Keepalived, on the other hand, is a daemon that can run on load balancing servers as well as other servers.
- High availability: Haproxy does not have built-in high availability capabilities, but can be used in conjunction with Keepalived to achieve high availability. Keepalived can monitor the operation status of Haproxy and automatically switch to a backup server when Haproxy fails.
- Setting up Haproxy is relatively complex, requiring manual configuration of multiple parameters and backend servers. On the other hand, setting up Keepalived is comparatively simple, only needing the specification of the primary and backup server IP addresses and monitoring port.
- Management Interface: Haproxy offers several open-source management interfaces that provide graphical operation interface for easy management and monitoring. In contrast, Keepalived does not have a management interface and requires management through command line or configuration files.
In summary, while Haproxy and Keepalived have differences in functionality and architecture, they can be used together to provide a high performance and high availability load balancing solution.
