Best High Availability Cluster Solutions

DRBD® (Distributed Replicated Block Device) is an open source, software‑based, shared‑nothing block storage replication solution for Linux, designed primarily to deliver high-performance, high‑availability (HA) data services by mirroring local block devices between nodes in real time, either synchronously or asynchronously. Implemented deep in the Linux kernel as a virtual block‑device driver, DRBD ensures local read performance with efficient write‑through replication to peer(s). User‑space utilities like drbdadm, drbdsetup, and drbdmeta enable declarative configuration, metadata management, and administration across installations. Originally built for two‑node HA clusters, DRBD 9.x extends support to multi‑node replication and integration into software‑defined storage (SDS) systems such as LINSTOR, making it suitable for cloud‑native environments.

NGINX Open Source: The open source web server that powers more than 400 million websites. NGINX Plus is a software load balancer, web server, and content cache built on top of open source NGINX. Use NGINX Plus instead of your hardware load balancer and get the freedom to innovate without being constrained by infrastructure. Save more than 80% compared to hardware ADCs, without sacrificing performance or functionality. Deploy anywhere: public cloud, private cloud, bare metal, virtual machines, and containers. Save time by performing common tasks through the built‑in NGINX Plus API. From NetOps to DevOps, modern app teams need a self‑service, API‑driven platform that integrates easily into CI/CD workflows to accelerate app deployment – whether your app has a hybrid or microservices architecture – and makes app lifecycle management easier.

StoneFly is the provider of high-performing, elastic and always available IT infrastructure solutions. Coupled with StoneFusion, our intelligent & patented operating system architecture, we can support your data dependent processes and applications seamlessly anywhere, anytime. Configure backup, replication, disaster recovery, scale out block, file and object storage in private and / or public clouds. Support virtual, container hosting & more. StoneFly also offers Cloud data migration services for email, archives, documents, SharePoint and physical and virtual storage. Total backup and disaster recovery solutions in a single appliance or cloud solution. Hyperconverged options allow physical machines to be restored as virtual machines running directly on the StoneFly disaster recovery appliance for instant recovery.

Deploy a reliable, performant, and feature-packed cloud server, available in Canada (Toronto and Montreal) and France (Roubaix). KVM cloud servers on redundant SSD disk arrays. Check out our pricing! Take live snapshots of your VM at any time to extract its current disk state for backups or cloning, without any downtime. Volumes are detachable disks stored on our high-availability cluster. Attach volumes to VMs for extra space, or provision VMs with a volume as the boot device. Automatically configure your VM during the boot process with bash and cloud-init startup scripts. Security groups allow you to define traffic restrictions on groups of virtual machines at the infrastructure level. Your VMs get their own private, isolated internal network, on which they can securely communicate. VMs can burst above their baseline performance for short periods to utilize additional CPU and I/O resources, making load spikes easier on your application.

The software load balancer, reverse proxy, web server, & content cache with the enterprise features and support you expect. Modern app infrastructure and dev teams love NGINX Plus. More than just the fastest web server around, NGINX Plus brings you everything you love about NGINX Open Source, adding enterprise‑grade features like high availability, active health checks, DNS system discovery, session persistence, and a RESTful API. NGINX Plus is a cloud‑native, easy-to-use reverse proxy, load balancer, and API gateway. Whether you need to integrate advanced monitoring, strengthen security controls, or orchestrate Kubernetes containers, NGINX Plus delivers the five‑star support you expect from NGINX. NGINX Plus provides scalable and reliable high availability along with monitoring to support debugging and diagnosing complex application architectures. Active health checks proactively poll upstream server status to get ahead of issues.

Our technology allows you to spin up a full hosted private cloud in 45 seconds. Think of it as the first “private cloud as a service”. All hosted private clouds start with a Cloud Core. OpenMetal’s Cloud Core is a hyper-converged set of 3 hosted servers of your chosen hardware type, spun up as a service. Your cloud is powered by OpenStack and Ceph. This brings you everything from Compute/VMs and Block Storage to powerful software defined networking to trivial-to-deploy Kubernetes. Plus, tooling for Day 2 Operations with built in monitoring, all bundled up in a modern portal. OpenMetal hosted private clouds are API-first systems to enable teams to use infrastructure as code. We recommend Terraform. CLI and GUI are also available by default.