OpenHPC: the packaging and integration layer under an HPC cluster

A repository, not a cluster manager

The repository description is precise about what this is: the OpenHPC Integration, Packaging and Test Repo, and the README calls the project community building blocks for HPC systems.

The stack provides a variety of common, pre-built ingredients required to deploy and manage an HPC Linux cluster, and the list is broad: provisioning tools, resource management, I/O clients, runtimes, development tools, containers, and a variety of scientific libraries.

That distinction matters for anyone reading the repository name and expecting a scheduler. There is no cluster manager here, in the sense of a tool that owns the lifecycle of compute nodes. What is here is the set of pieces such a manager is built from, packaged so that they install cleanly together on a supported distribution, and tested as a set.

The consequence is that OpenHPC is what a site adopts when it wants a coordinated stack rather than a hand-built one. The pieces are individually replaceable, since they are packages built with the distribution's own tooling, and the value of the project is the coordination: the versions are chosen together, the repositories are signed, and the installation guides describe a working combination.

The primary language is recorded as C, which reflects the native components in the stack rather than the packaging layer itself, and the Apache-2.0 licence is the one most sites expect from a Linux Foundation project.

Three release series, three generations of Linux

There are currently three release series, and the mapping to distributions is the single most important fact in the README.

The 2.x series targets EL8 and Leap15. The 3.x series targets EL9, Leap 15 and openEuler 22.03. The 4.x series targets EL10 and openEuler 24.03.

So the project maintains parallel branches against successive generations of enterprise Linux, and the default branch of this repository is 4.x, which is the newest.

The release tags confirm that all three are still active. The list shows v2.11.GA and v3.6.GA, both dated 2026-09-13, and v2.10.GA from 2026-06-22. A 2.x series receiving a general availability release in September 2026 tells you two things: the older branch is still being maintained for sites that cannot move off EL8, and the branch count is part of the design rather than a leftover.

For an adopter this is a maintenance obligation as much as an opportunity. Choosing a series ties you to a distribution generation, and staying on 2.x means staying on EL8, which has its own end-of-life clock. The wiki pages for each series, 2.x, 3.x and 4.x, are the place to read what is actually in each one.

One RPM enables the repositories

The getting started section is short because the mechanism is one package.

OpenHPC provides pre-built binaries via repositories for use with standard Linux package manager tools, for example dnf or zypper. To get started you enable an OpenHPC repository locally by installing an ohpc-release RPM, which includes the gpg keys for package signing and defines the URL locations for the base and update package repositories.

The structure is the conventional one, and it is worth naming explicitly:

ohpc-release
[base]
[update]

The gpg keys in that package are what let the package manager verify what it downloads, and the base and update repositories are the two halves of the delivery model, a stable set and a moving one. Installing a single signed RPM to turn on a signed repository is the pattern the whole distribution ecosystem uses, and using it here means the security model is the one the distribution already trained its administrators on.

After the repository is enabled, the components are installed with the ordinary package manager commands, and the installation guides are tailored per supported provisioning system and resource manager, with detailed example instructions for installing a cluster. Copies of the ohpc-release package and the installation guides are available on the relevant release series pages.

The recipe explorer renders the guide you need

The most useful piece of tooling described in the README is the recipe explorer, hosted at openhpc.github.io/ohpc. The installation guides can be read online there, and the way it works is that you choose a base OS, an architecture, a provisioner and a resource manager, and it renders the matching guide for the current releases and the development branches.

This is a small idea with real consequences. The complexity of an HPC stack comes from the number of combinations, and the usual result is a wiki page per combination that goes stale. Generating the guide from the combination you actually need means the guide is current for the release you are on, and the fact that the explorer covers development branches as well as releases means a site can prepare for an upgrade before it happens.

The four inputs also tell you what the project considers the axes of variation. Base OS, because the series are cut per distribution. Architecture, because the packages are not universal. Provisioner, because how the cluster gets its nodes changes the bootstrap steps. And resource manager, because the scheduling stack is what the rest of the cluster is integrated with.

For a site evaluating OpenHPC, running the explorer with your intended combination is the fastest way to see whether the answer is a good answer.

Adding a component, and what a pull request should contain

The software request policy is short and practical. If you would like to see new software included in OpenHPC, open an issue with as much detail as possible, and the README suggests going further and considering a pull request directly. For a new component, a pull request should typically include tests and documentation, and the maintainers are happy to guide contributors through the process.

The expectation that a new component arrives with tests and documentation is the important part. OpenHPC is a packaging project, so the deliverable is not only the software but the recipe that installs it, the dependency list, the test that proves the package works on each supported distribution, and the documentation that tells a site administrator what they now have.

The repository layout supports that work. There is a components/ directory, a containers/ directory, a devel/ directory, a docs/ directory, a misc/ directory and a tests/ directory, with a .devcontainer/ for a reproducible development environment and a .codespellrc for the spell checker that runs over the documentation. The top-level CONTRIBUTING.md holds the steps, and there is a system registration form, with a request that anyone using elements of OpenHPC consider registering their systems, which is how a project of this kind tracks its real-world footprint.

Where OpenHPC is the wrong choice

The first wrong-tool case is a site that wants to pick its own stack. OpenHPC's value is that the versions are chosen together, and a site with a strong opinion about its MPI implementation, its resource manager version or its container runtime is fighting that value by definition. In that case, packaging each component from its upstream source is a defensible choice, and the OpenHPC repository becomes a reference rather than a dependency.

The second is a small cluster or a single workstation. A stack aimed at large multi-node clusters is a heavy answer to a problem that one machine and one scheduler solve. The provisioning and resource management components carry configuration and operational weight that a small site does not need.

The third is a site that cannot commit to a distribution generation. Since each series targets specific enterprise Linux versions, choosing OpenHPC means choosing where your base OS sits in its lifecycle. A site that expects to move to a newer generation soon is better served by the newer series or by waiting, since the upgrade path between series is not something the README describes.

There is also the question of where the projects sit in their own lifecycles. The distribution vendors ship their own HPC stacks, and OpenHPC coexists with them rather than replacing them, so a site that already has a vendor-supported stack gains nothing from assembling the same pieces again.

Apache-2.0, parallel GAs and a moving 4.x branch

The project is licensed under Apache-2.0, with the LICENSE file at the repository root, and it carries the topics that describe its scope: clusters management, devtools, hpc, linuxfoundation, mpi, package repository and scientific computing.

The activity picture is healthy and wide. The last push was on 2026-10-19, the default branch is 4.x, and the release list shows general availability tags for two different series on the same day in September 2026, v2.11.GA and v3.6.GA, with v2.10.GA from June 2026 for the 2.x line. The.GA suffix is the distribution convention for a generally available release, which is what a site installs.

The support model is community based. Questions, comments and bug reports go to the users email list, a groups.io list at openhpc-users, or the openhpc.community page, and the project is hosted under the Linux Foundation organisation on GitHub.

For an adopter, the practical summary is this. OpenHPC is the layer that turns a set of individually packaged HPC components into a set you can install together, with signed repositories, per-distribution branches maintained in parallel, and generated installation guides. The commitment it asks for is a distribution generation, and the documentation it offers in return is generated from the combination you chose.

Editorial conclusion

Adopt OpenHPC if you are building a Linux HPC cluster and want the provisioning tool, resource manager, I/O clients, MPI runtime and scientific libraries installed from a coordinated set of repositories instead of assembled by hand, and choose the release series that matches your base distribution. Do not adopt it as a scheduler or a cluster manager, since it is the packaging and integration layer, and do not expect a single codebase to serve every site, because the series are cut per distribution generation. Before you start, install the ohpc-release package for your series, read the installation guide the recipe explorer renders for your base OS, architecture, provisioner and resource manager, and register your systems afterwards as the project asks.

Frequently asked questions

Official sources

1. License: Apache-2.0
2. openhpc/ohpc on GitHub
3. Project website
4. README
5. Releases