Conclusion

This project successfully implemented a High Availability ERPNext environment using Proxmox Virtual Environment as the virtualization platform.

The deployment evolved from a basic ERPNext installation into a distributed architecture consisting of three independent application servers, three dedicated database servers, Proxmox High Availability, and a dedicated HAProxy load balancer.

The completed infrastructure demonstrates that application-level redundancy can be achieved using virtual machine failover combined with intelligent load balancing.

Unlike a conventional single-server deployment, the implemented architecture is capable of automatically recovering application virtual machines and distributing user requests across multiple backend servers, thereby improving service availability and reducing downtime.

The project also provided valuable practical experience in virtualization, Linux system administration, networking, reverse proxy configuration, load balancing, and high availability concepts.

Although database replication and redundant load balancers remain future enhancements, the developed system provides a solid foundation for building an enterprise-grade ERPNext deployment.