Migrating from Helm v2 to v3 is an essential task for DevOps engineers and developers seeking enhanced features, improved security, and better performance in their Kubernetes projects. Helm v3, released in 2019, addressed many limitations and security concerns of Helm v2, making it the preferred choice for managing Kubernetes packages. In this guide, you’ll learn a step-by-step process for migrating from Helm v2 to v3 in 2025, ensuring a smooth transition.
Why Migrate to Helm v3?
Before diving into the migration process, it’s crucial to understand the benefits of upgrading to Helm v3:
- Security Improvements: Helm v3 removes Tiller, which eliminates cluster-wide superuser permissions and enhances security.
- Refined Helm Commands: Experience improved command-line usability with more intuitive commands.
- Native Support for JSON Schema: Harness enhanced chart validation capabilities with JSON schema support.
- Improved CRD Management: Helm v3 simplifies Custom Resource Definitions (CRDs) installation and upgrade processes.
- Better Chart Dependency Management: A redefined chart dependency management system streamlines chart maintenance.
Prerequisites
- Ensure you have both Helm v2 and Helm v3 installed on your local machine.
- Access to your Kubernetes cluster with necessary permissions.
- Backup any existing helm-sensitive data.
Step-by-Step Migration Guide
Step 1: Install Helm v3
If you haven’t already installed Helm v3, download the latest version from the official Helm GitHub releases page. Follow the installation instructions for your operating system.
Step 2: Verify Helm v2 Configurations
Use Helm v2 to list existing Helm releases. This step assists in understanding your current setup:
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helm list
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Check for any configurations, charts, and released versions that need migration.
Step 3: Migrate Helm v2 Data
To facilitate the migration, use the helm-2to3 plugin. This plugin aids in transferring Helm v2 data to Helm v3.
Install the helm-2to3 Plugin:
1helm plugin install https://github.com/helm/helm-2to3.gitConvert Helm v2 Configurations and Releases:
1helm 2to3 convert --delete-v2-config --delete-v2-releases
This command converts Helm v2 releases to Helm v3 and optionally cleans up v2 data.
Step 4: Validate Migration
List all Helm v3 releases to ensure migration success:
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helm list --all-namespaces
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Step 5: Verify Kubernetes Cluster Configuration
Ensure your Helm v3 setup works perfectly with your Kubernetes cluster.
Additional Tips for Helm Chart Management
Explore new Helm v3 functions in your Helm charts to take advantage of improved features. See kubernetes helm chart function examples for more insights.
For ongoing maintenance, keep your cluster clean by regularly deleting outdated Helm releases. Refer to helm release cleanup for guidance.
Conclusion
Migrating from Helm v2 to v3 in 2025 is a crucial step to leverage the latest advancements in Kubernetes package management. This guide facilitates a seamless transition, ensuring secure, efficient, and scalable Helm operations.
Remember, while Helm management is essential for Kubernetes, for activities outside the realm of DevOps, like knowing how to fit a ski helmet, ensuring precise and safe fitment is just as crucial.
Embark on your Helm v3 transition today and take your Kubernetes deployments to the next level!