Best High Availability Cluster Solutions for Linux of 2025

Percona XtraDB Cluster is an open-source, high availability, MySQL clustering solution. It helps enterprises reduce unexpected downtime and data losses, lower costs, and improve performance and scalability in their database environments. PXC supports critical business applications in the most demanding public and private cloud environments. Percona XtraDB Cluster, (PXC), preserves, secures and protects data as well as revenue streams, by providing the highest availability for business-critical applications. PXC can help you reduce costs, eliminate license fees, and meet budget constraints. Our integrated tools allow you to optimize, maintain, monitor, and monitor your cluster. This allows you to get the most from your MySQL environment.

ClusterControl is a multi-cloud hybrid database ops orchestration platform that supports MongoDB and Elasticsearch as well as Redis, TimescaleDB and SQL Server on Linux. It also supports Galera Cluster, PostgreSQL and MySQL in cloud and on-premises environments. It can handle all aspects of the lifecycle, including deployment, failover, backup, and more. It allows organizations to implement the Sovereign DBaaS model with its full suite of databases and ops features. ClusterControl is the ideal solution for organizations who need to run large-scale, open source database operations reliably but don't want to be restricted by traditional DBaaS providers. It allows you to choose your environment, stability of licenses, and gives you DB access.

DRBD® (Distributed Replicated Block Device) is an open source, software-centric solution for block storage replication on Linux, engineered to provide high-performance and high-availability (HA) data services by synchronously or asynchronously mirroring local block devices between nodes in real-time. As a virtual block-device driver deeply integrated into the Linux kernel, DRBD guarantees optimal local read performance while facilitating efficient write-through replication to peer devices. The user-space tools, including drbdadm, drbdsetup, and drbdmeta, support declarative configuration, metadata management, and overall administration across different installations. Initially designed to support two-node HA clusters, DRBD 9.x has evolved to accommodate multi-node replication and seamlessly integrate into software-defined storage (SDS) systems like LINSTOR, which enhances its applicability in cloud-native frameworks. This evolution reflects the growing demand for robust data management solutions in increasingly complex environments.

NGINX Open Source is the web server that supports over 400 million websites globally. Built upon this foundation, NGINX Plus serves as a comprehensive software load balancer, web server, and content caching solution. By opting for NGINX Plus instead of traditional hardware load balancers, organizations can unlock innovative possibilities without being limited by their infrastructure, achieving cost savings of over 80% while maintaining high performance and functionality. It can be deployed in a variety of environments, including public and private clouds, bare metal, virtual machines, and container setups. Additionally, the integrated NGINX Plus API simplifies the execution of routine tasks, enhancing operational efficiency. For today's NetOps and DevOps teams, there is a pressing need for a self-service, API-driven platform that seamlessly integrates with CI/CD workflows, facilitating faster app deployments regardless of whether the application utilizes a hybrid or microservices architecture, which ultimately streamlines the management of the application lifecycle. In a rapidly evolving technological landscape, NGINX Plus stands out as a vital tool for maximizing agility and optimizing resource utilization.

DxEnterprise is a versatile Smart Availability software that operates across multiple platforms, leveraging its patented technology to support Windows Server, Linux, and Docker environments. This software effectively manages various workloads at the instance level and extends its capabilities to Docker containers as well. DxEnterprise (DxE) is specifically tuned for handling native or containerized Microsoft SQL Server deployments across all platforms, making it a valuable tool for database administrators. Additionally, it excels in managing Oracle databases on Windows systems. Beyond its compatibility with Windows file shares and services, DxE offers support for a wide range of Docker containers on both Windows and Linux, including popular relational database management systems such as Oracle, MySQL, PostgreSQL, MariaDB, and MongoDB. Furthermore, it accommodates cloud-native SQL Server availability groups (AGs) within containers, ensuring compatibility with Kubernetes clusters and diverse infrastructure setups. DxE's seamless integration with Azure shared disks enhances high availability for clustered SQL Server instances in cloud environments, making it an ideal solution for businesses seeking reliability in their database operations. Its robust features position it as an essential asset for organizations aiming to maintain uninterrupted service and optimal performance.

Experience a robust, efficient, and feature-rich cloud server solution that operates in Canada (specifically Toronto and Montreal) as well as in France (Roubaix). Our KVM cloud servers utilize redundant SSD disk arrays to ensure reliability and speed. Explore our competitive pricing options! You can take live snapshots of your virtual machine at any moment, allowing you to capture its current disk state for backup or cloning purposes, all without any downtime. Additional storage is facilitated through detachable volumes that are stored on our high-availability cluster, which can be attached to virtual machines for expanded space or utilized as a boot device. During the boot process, your VM can be automatically configured using bash scripts and cloud-init, streamlining setup. Security groups grant you the ability to impose traffic restrictions on collections of virtual machines at the infrastructure level, enhancing security. Each virtual machine operates on its own private, isolated internal network, ensuring secure communication among them. Furthermore, our VMs can temporarily exceed their baseline performance, allowing them to harness extra CPU and I/O resources during load spikes, thereby easing the demands placed on your application. This flexibility and security make our cloud services an excellent choice for your hosting needs.

NGINX Plus serves as a software load balancer, reverse proxy, web server, and content cache, equipped with the enterprise-level features and support that users anticipate. This solution is favored by modern application infrastructure and development teams for its efficiency. Beyond being recognized as one of the fastest web servers, NGINX Plus enhances the beloved attributes of NGINX Open Source by incorporating enterprise-grade functionalities such as high availability, active health checks, DNS service discovery, session persistence, and a RESTful API framework. It stands out as a cloud-native, user-friendly reverse proxy, load balancer, and API gateway. Whether your goal is to enhance monitoring capabilities, bolster security measures, or manage Kubernetes container orchestration, NGINX Plus ensures you receive the exceptional support synonymous with the NGINX brand. Additionally, it offers scalable and dependable high availability, equipped with monitoring tools to assist in debugging and diagnosing intricate application architectures. With active health checks, NGINX Plus continually monitors the status of upstream servers, allowing teams to anticipate and address potential issues before they escalate.

HPE Serviceguard for Linux (SGLX) is a clustering solution focused on high availability (HA) and disaster recovery (DR) that aims to ensure maximum uptime for essential Linux workloads, whether they are deployed on-premises, in virtualized setups, or across hybrid and public cloud environments. It consistently tracks the performance of applications, services, databases, servers, networks, storage, and processes; when it identifies issues, it rapidly initiates automated failover, typically within four seconds, all while maintaining data integrity. SGLX accommodates both shared-storage and shared-nothing architectures through its Flex Storage add-on, which allows for the provision of highly available services like SAP HANA and NFS in situations where SAN is not an option. The E5 edition, which is solely focused on HA, offers zero-RPO application failover alongside comprehensive monitoring and a user-friendly workload-centric graphical interface. In contrast, the E7 edition that combines HA and DR features introduces capabilities such as multi-target replication, automated recovery with a simple button press, rehearsals for disaster recovery, and the flexibility for workload mobility between on-premises systems and the cloud, thereby enhancing operational resilience. This versatility makes SGLX a valuable asset for businesses aiming to maintain continuous service availability in the face of potential disruptions.

SIOS LifeKeeper for Windows is an all-encompassing solution designed for high availability and disaster recovery, seamlessly combining features like failover clustering, continuous monitoring of applications, data replication, and adaptable recovery policies to achieve an impressive 99.99% uptime for various Microsoft Windows Server environments, including physical, virtual, cloud, hybrid-cloud, and multicloud setups. System administrators have the flexibility to construct SAN-based or SANless clusters utilizing multiple storage options, such as direct-attached SCSI, iSCSI, Fibre Channel, or local disks, while also selecting between local or remote standby servers that cater to both high availability and disaster recovery requirements. With its real-time block-level replication capabilities provided through the integrated DataKeeper, LifeKeeper offers WAN-optimized performance, which features nine distinct levels of compression, bandwidth throttling, and built-in WAN acceleration, guaranteeing effective data replication across different cloud regions or over WAN networks without relying on additional hardware accelerators. This robust solution not only enhances operational resilience but also simplifies the management of complex IT infrastructures. Ultimately, SIOS LifeKeeper stands out as a vital tool for organizations aiming to maintain seamless service continuity and safeguard their valuable data assets.

IBM Z System Automation is an application built on NetView that serves as a centralized hub for managing a comprehensive array of system management tasks. Its significance lies in delivering advanced automation solutions tailored for enterprise needs. By efficiently monitoring, controlling, and automating a wide variety of system components, it encompasses both hardware and software resources throughout the organization. This policy-driven, self-healing, and high-availability solution is specifically aimed at enhancing the performance and uptime of vital systems and applications. Moreover, it minimizes the workload associated with administrative and operational tasks, lowers the need for customization and programming, and streamlines the time and costs required for automation implementation, particularly in environments using Parallel Sysplex and policy-driven automation. Furthermore, the seamless integration with Geographically Dispersed Parallel Sysplex (GDPS) equips IBM Z System Automation with advanced disaster recovery functionalities, ensuring robust protections for IBM Z systems against potential failures. Overall, its multifaceted capabilities make it an indispensable tool for modern enterprises reliant on high availability and efficiency.

Reduce unexpected downtime and lessen the risk of data loss resulting from corruption or system failures. The SLE HA extension features geo clustering capabilities to oversee clustered servers, whether they are located on-premises or in cloud environments globally. Our policy-driven, robust extension for Linux clusters ensures that your business remains operational while significantly reducing unplanned downtime across various locations and regions. With flexible, policy-driven clustering and continuous data replication, you can enhance adaptability while improving service availability and resource efficiency by integrating both physical and virtual Linux server clusters. A powerful unified interface allows you to install, configure, manage, and monitor your clustered Linux environments seamlessly. Additionally, multi-tenancy functionality enables you to organize geo clusters in alignment with specific business requirements, ensuring tailored management and optimal performance. This comprehensive approach offers a strategic advantage in maintaining system resilience and operational excellence.

Our Libelle BusinessShadow solution offers a robust approach to disaster recovery and high availability by enabling the mirroring of databases and application systems with a controlled time delay. This innovative solution safeguards your organization against not only hardware failures and application glitches but also elemental disasters, sabotage, and accidental data loss. Central to this system is our patented time funnel, which efficiently holds change logs prior to their transfer to the standby system. This design allows for a seamless and rapid transition to the standby setup during errors or maintenance tasks, ensuring minimal disruption. By leveraging the time funnel, you can swiftly revert to an error-free state without the cumbersome process of restoring from backups. Notably, your data remains consistently up to date, as it is temporarily preserved in the time funnel rather than relying on outdated backup copies. This solution not only enhances resilience but also streamlines operations, providing peace of mind in the face of potential disruptions.

Eddie serves as a tool for high availability clustering, functioning as a fully open-source software solution primarily developed in the functional programming language Erlang (www.erlang.org) and compatible with Solaris, Linux, and *BSD operating systems. Within this architecture, specific servers are assigned as Front End Servers, tasked with managing and allocating incoming traffic to designated Back End Servers, while also monitoring the status of those Back End Web Servers at the site. These Back End Servers can accommodate various Web servers, such as Apache, and incorporate an Enhanced DNS server that facilitates both load balancing and the oversight of site accessibility for web platforms distributed across different geographical locations. This structure ensures continuous access to the full capacity of the website, irrespective of its location. The white papers on Eddie delve into the necessity for solutions like Eddie and elaborate on its unique methodology. This comprehensive approach highlights the critical role of Eddie in maintaining seamless web operations across diverse environments.