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The Linux-HA (High-Availability Linux) project provides a high-availability solution for Linux, FreeBSD, OpenBSD, Solaris and Mac OS X which promotes reliability, availability, and serviceability (RAS). [1] The project's main software product is Heartbeat, a GPL-licensed portable cluster management program for high-availability clustering. Its ...
The most common size for an HA cluster is a two-node cluster, since that is the minimum required to provide redundancy, but many clusters consist of many more, sometimes dozens of nodes. The attached diagram is a good overview of a classic HA cluster, with the caveat that it does not make any mention of quorum/witness functionality (see above).
The Red Hat Cluster Suite (RHCS) includes software to create a high availability and load balancing cluster. Both can be used on the same system although this use case is unlikely. Both products, the High Availability Add-On and Load Balancer Add-On, are based on open-source community projects. Red Hat Cluster developers contribute code ...
Heartbeat, from Linux-HA; Proxmox; Docker Swarm; Red Hat cluster suite; OpenShift and OKD, from Red Hat; Nomad, from HashiCorp; Rancher, from Rancher Labs; TrinityX from ClusterVision Solutions; Corosync Cluster Engine; OpenSVC; K3s ("Lightweight Kubernetes"), from Rancher Labs [1] Qlustar; Non-High-availability cluster Foreman; oneSIS; OpenHPC
OpenSSI is designed to be used for both high performance and high availability clusters. It is possible to create an OpenSSI cluster with no single point of failure, for example the file system can be mirrored between two nodes, so if one node crashes the process accessing the file will fail over to the other node. Alternatively the cluster can ...
SIOS LifeKeeper (formerly known as SteelEye LifeKeeper) is a high-availability cluster software, for Linux computer systems. It provides application cluster capabilities for nonstop operation and disaster recovery to systems running databases, file sharing on a network, electronic commerce websites, ERP systems or other applications requiring nonstop operation
Pacemaker is an open-source high availability resource manager software used on computer clusters since 2004. Until about 2007, it was part of the Linux-HA project, then was split out to be its own project. [3] It implements several APIs for controlling resources, but its preferred API for this purpose is the Open Cluster Framework resource ...
Conventional computer cluster systems typically use some sort of shared storage for data being used by cluster resources. This approach has a number of disadvantages, which DRBD may help offset: Shared storage resources must typically be accessed over a storage area network or on a network attached storage server, which creates some overhead in ...