LTS 2.541.1 release

[lemeurherve]

Release date: 2026-01-21

As the incoming LTS 2.541.1 release include major changes in several areas, it deserves its own issue, allowing to capture what has been done in various places.

On the packaging and release side¹

• pkg.jenkins.io:
  • [pkg.jenkins.io] Unify RPM Jenkins packages (RedHat/OpenSUSE) ✅
  • [pkg.jenkins.io/release.ci.jenkins.io] New Jenkins Packaging GPG key ✅
• get.jenkins.io:
  • Add .war.asc to get.jenkins.io ✅
• docker controller images:
  • Publish Docker controller LTS images from a stable-<release-line> branch ✅

Post-release
On the infra/packaging side:

• Update ci.jenkins.io, trusted.ci, cert.ci and release.ci to latest LTS version 2.541.1 #4965
• Older Jenkins LTS releases are gone in redhat-stable package repo metadata jenkinsci/jenkins#26156

On the doc side:

• Restore LTS signing key instructions in blog post jenkins.io#8746

Refs:

• 2.541 as 21 Jan 2026 LTS baseline mailing list thread
• LTS 2.541.1 release checklist
• https://www.jenkins.io/changelog/2.541.1/
• https://github.com/jenkinsci/docker/releases/tag/2.541.1

Related:

• 2+2+2 Java Support Plan
• Enable Java 25 support
• provide jdk25 variants
• Provide Windows Server 2022 image

Footnotes

1. all checks listed in #jenkinsci/release thread: https://matrix.to/#/!JlkqzpdEnsUUuVtjgE:matrix.org/$KTeQzPKM41ByOqPo00Xz3uwC2yLAyuBpYPjcnNBGdYY?via=matrix.org&via=gitter.im ↩

[lemeurherve]

Related:

Weekly 2.545

Now requiring JDK21:

• Changelog: https://www.jenkins.io/changelog/2.545
• Mailing list thread: Removal of JDK17 (aka "Require Java 21 or newer") in Jenkins Core
• Core change: Require JDK21 or newer
• Docker image change: Remove JDK17 from controller images

Related issues:

• Jenkins 2.545 AlmaLinux package forces Java 17 dependency, breaks startup requiring Java 21 jenkinsci/packaging#729 (comment)
• Weekly 2.545 images have been published with JDK17 tags by mistake jenkinsci/docker#2182

[cathychan]

As the incoming LTS 2.541.1 release include major changes in several areas

In Jenkins Core itself:

• Require Java 21 or newer jenkinsci/jenkins#26018

This will NOT be part of the 2.541.x LTS line. It has been removed from jenkinsci/jenkins#26070. See also https://groups.google.com/g/jenkinsci-dev/c/BSobSs2bFik/m/mhv5hcUpBwAJ

[lemeurherve]

My mistake, edited out, thanks @cathychan!

[lemeurherve]

FTR, jenkinsci/docker#2195 has been approved. stable-2.541 branch created, backport similar to jenkinsci/packaging#728 and jenkins-infra/release#833 incoming in the next days.

Issue body updated, also noting jenkinsci/docker#2197