Compatibility of Bitnami Redis Secure Images with Different Helm Chart Versions

Products

• Bitnami Secure Images

Issue/Introduction

Users may notice a version mismatch between the available Bitnami Secure Image (BSI) and the Helm charts listed on the portal. For example, a user may need to deploy Redis Secure Image 7.4.8 (Debian-based), but the portal only lists Chart version 8.6.

Common concerns include:

• Whether the newer chart is compatible with an older image branch.
• Whether configuration templates (redis.conf), directory structures, and environment variables remain functional across versions.

Environment

Bitnami Helm Chart

Cause

Bitnami Helm charts default to the latest available version branch of the product. However, the charts are designed to maintain backward compatibility with older, supported product branches.

Resolution

Helm charts are compatible across multiple version branches. You can use a newer chart version with an older product image by overwriting the image tags. 

The Redis Helm charts currently support multiple branches, including:

• 6.2, 7.4, 8.0, 8.2, 8.4, and 8.6.

Additional Information

Steps to Deploy a Specific Image Version:

1. Identify the required image tag for your version (e.g., 7.4.8-debian-12-rX).
2. Use the latest available Helm chart (e.g., Chart 8.6).
3. In your values.yaml file, overwrite the image repository and tag:

   image:
     repository: [YOUR_REGISTRY]/bitnami/redis
     tag: 7.4.8-debian-12-rX

    
4. Deploy the chart using helm install or helm upgrade.  The configuration templates and environment variables in the newer chart version are tested for backward compatibility with these supported branches.