Getting Started with Jenkins X Upgrades: A Practical Guide

Upgrading Jenkins X isn’t just about staying current—it’s about keeping your entire CI/CD ecosystem stable. If you’ve ever delayed an upgrade because “everything works fine,” you’re not alone. But with Jenkins X, upgrades are part of the workflow, not a disruption to it.

Let’s walk through how Jenkins X upgrades actually work, what gets upgraded, and how to do it without breaking your pipelines.

What Does “Upgrading Jenkins X” Really Mean?

Unlike traditional Jenkins setups, Jenkins X is deeply tied to Kubernetes, GitOps, and versioned environments. So an “upgrade” can involve multiple layers:

• Jenkins X CLI (jx)
• Platform components (Tekton, Lighthouse, etc.)
• Environment repositories
• Helm charts and dependencies

Here’s where things get interesting: most upgrades are handled declaratively via Git. That means you're not just running commands—you’re updating desired state.

Start with the CLI Upgrade

Before touching anything else, make sure your CLI is up to date.

You can check your current version:

1jx version

Then upgrade:

1jx upgrade cli

This ensures compatibility with newer platform components and APIs.

Understanding Version Streams

Jenkins X uses something called a version stream. Think of it as a curated set of compatible versions for all components in your system.

Instead of manually upgrading each tool, you update the version stream reference.

Typical structure in your environment repo:

1versionStream:
2  ref: v2024.03.15

Changing this reference and committing it triggers upgrades through your GitOps pipeline.

Why this matters

This approach avoids “dependency mismatch hell.” Everything in the stream is tested together.

Upgrading Environments via GitOps

In Jenkins X, environments like staging and production are defined as Git repositories.

To upgrade:

1. Update the version stream reference
2. Commit and push changes
3. Let Jenkins X reconcile the state

Example workflow:

1git clone https://github.com/your-org/environment-staging
2cd environment-staging
3# update versionStream in jx-requirements.yml
4git commit -am "chore: upgrade version stream"
5git push

Once pushed, Jenkins X applies the new configuration automatically.

Pipeline and Build Pack Upgrades

Another piece developers often overlook: build packs.

These define how your applications are built and deployed.

To upgrade build packs:

1jx project upgrade

This updates your pipeline definitions to align with the latest best practices.

A common mistake

Developers upgrade the platform but forget build packs. This leads to inconsistent pipeline behavior.

Safe Upgrade Strategy

Upgrades don’t have to be risky if you approach them incrementally.

1. Start with non-production environments

Upgrade staging first. Let pipelines run. Observe behavior.

2. Review pull requests carefully

Most upgrades show up as Git diffs. Pay attention to:

• Helm chart changes
• Resource limits
• Pipeline steps

3. Monitor after deployment

Use logs and metrics to catch regressions early.

4. Promote only when stable

Once staging is validated, promote changes to production.

What Actually Breaks During Upgrades?

Let’s be realistic—things can break. The usual suspects include:

• Deprecated APIs in Kubernetes
• Pipeline syntax changes
• Helm chart incompatibilities
• Custom overrides conflicting with new defaults

The good news: Jenkins X’s GitOps model makes rollbacks straightforward.

Rolling back

Just revert the commit in your environment repo:

1git revert <commit-hash>
2git push

The system will reconcile back to the previous state.

Automating Jenkins X Upgrades

If you want to avoid manual intervention, you can automate upgrades using bots or scheduled pipelines.

Some teams:

• Schedule weekly version stream updates
• Use pull request automation for upgrades
• Run integration tests before merging

This turns upgrades into a routine instead of a reactive task.

Performance and Stability Considerations

Upgrades can impact performance, especially if underlying components like Tekton change behavior.

Watch for:

• Pipeline execution time changes
• Resource consumption spikes
• Pod scheduling delays

If something feels off, compare metrics before and after the upgrade.

When Should You Upgrade?

There’s no single rule, but a good cadence is:

• Regular minor updates (weekly or biweekly)
• Careful evaluation of major changes

Delaying upgrades too long can make transitions harder later.

Quick Recap

Jenkins X upgrades are less about running commands and more about managing desired state through Git. Once you understand version streams and environment repositories, the process becomes predictable and safe.

If you treat upgrades as part of your CI/CD lifecycle—not an afterthought—you’ll avoid most of the pain teams associate with them.

Start small, automate where possible, and let GitOps do the heavy lifting.