Redis
This guide will walk you through the steps to integrate Redis into your existing Helm chart for your Kubernetes application. By adding Redis, you can leverage its capabilities for caching, session management, and more. We will use the Bitnami Redis Helm chart as a dependency and configure it accordingly.
Prerequisites
- Helm installed and configured
- Kubernetes cluster up and running
- Existing Helm chart for your application
Steps to Integrate Redis
1. Add Redis Helm Repository
First, add the Bitnami repository, which hosts the Redis Helm chart,
2. Update Chart.yaml
Open your existing Helm chart directory and edit the Chart.yaml
file to add Redis as a dependency,
3. Update values.yaml
Create or update the values.yaml file to include configuration values for Redis. Customize the values as per your requirements. Refer to https://github.com/bitnami/charts/blob/main/bitnami/redis/README.md#parameters for all the available configuration parameters supported by Redis chart.
Over-provisioning on disk size (master.persistence.size
) isn’t a bad idea considering that disks are cheap in any
cloud. It is also slightly trickier to increase volume sizes at later point in time due to some Kubernetes
limitations. So we recommend you pick a good number here from the start.
4. Install/Update Dependencies
Navigate to your Helm chart directory and run the following command to update dependencies,
This command will download the Redis chart and add it to your charts/ directory.
5. Update Your Application Deployment
Modify your application’s deployment files to include the Redis service. Ensure your application can connect to Redis
using the service name and credentials specified in the values.yaml
file.
For example, if using a ConfigMap to store environment variables for your application, you might update it like this,
6. Deploy Your Application
Finally, deploy or upgrade your application using Helm,
7. Verify Deployment
Check the status of your Helm release to ensure everything is running correctly,
Also, verify that the Redis pod is running:
You should see a pod for Redis, something like your-app-redis-master-0
.
Congratulations! You have successfully added Redis to your existing Helm chart. This integration allows your application
to use Redis for caching, session management, and other use cases, managed efficiently with Helm. Customize the Redis
configuration further by modifying the values.yaml
file as needed. 🎉