Linux on IBM Z and IBM LinuxONE use the s390x hardware architecture to run various Linux distributions, including SUSE Linux Enterprise Server (SLES), Red Hat Enterprise Linux (RHEL), and Ubuntu. Tens of thousands of software packages are tested and distributed through these projects, and various community distributions.

But for some applications, a team at IBM pays special attention to make sure they compile and run as expected, or better. This work is often done as a collaboration between the open source projects themselves and the team at IBM. This effort is an on-going collaboration with every release of the software needing to be validated.

For the month of May 2026, the team worked to validate recent versions of the following:

• Apache Cassandra
• Apache Hbase
• Apache HTTP Server
• Apache Ignite
• Beats
• cAdvisor
• Calico
• Doxygen
• Falco
• Grafana
• HAProxy
• Htop
• MongoDB Driver - Java
• MongoDB Driver - PHP
• MongoDB Driver - Ruby
• Netty-tcnative
• Neo4j
• OPA
• OpenResty
• PHP
• PM2
• PostgreSQL
• Python
• R
• RabbitMQ
• Ruby
• Terraform

The full list of validated software to date is available here: https://www.ibm.com/community/z/open-source-software/

Looking for open source software that's not maintained by this team? Visit the Open Mainframe Project Software Discovery Tool to search for what you're looking for across a number Linux distributions. And there are always folks from IBM and beyond working to enable more projects that we don't even know about!

It was a great month for s390x support in the broader open source community, with over 10 projects adding support! These included Kuadrant dns-operator CI and v0.17.0 release binaries, CI for go-simdjson and an update to their README, and CI for aba and a README update there too. The 0.6.0 release of poof includes s390x support, and go-bin had their first s390x wheels release with version 1.26.3. There is now s390x CI for nginx-opentracing, along with DockerHub images starting with version 0.42.0. The OpenSCM client has added s390x to its Supported Platforms as of the release of version 0.2.8. And finally, Terraform 1.15.4 has been released with s390x DockerHub images and binary downloads from their Install page. Over in our hosted GitHub Actions service for IBM Z and Power, we on-boarded ncruces/wasm2go and ncruces/go-sqlite3, and NumPy (which previously was only being tested on this infrastructure for IBM Power).

This month the Open Mainframe Project Mainframe Software Hub for Linux added builds for InfluxDB 3 Core and MySQL 8.4.8 and 9.6.0, and released updates for Spire and Beats. Do you happen to have some scripts and patches tucked away that you use for your own software builds for Linux on IBM Z and LinuxONE? We invite you to join us!

Are you a developer for an open source project interested in seeing your application made available to users on Linux on IBM Z and IBM LinuxONE? Your first stop should be the IBM LinuxONE Community Cloud where you can sign up for a free virtual machine for 120 days where you can see how your application runs, and discover for yourself what you may need to change to get it to run well on Linux on IBM Z and IBM LinuxONE.

If you wish to have permanent virtual machines for development, testing, or to add to your CI system, you can fill out this form to apply for resources for your project.

See you next month!