Postgres
This guide will walk you through the steps to add a PostgreSQL database to an existing Helm chart for your Kubernetes application. Helm charts help manage Kubernetes applications using templates, and adding PostgreSQL will involve integrating the Bitnami PostgreSQL Helm chart as a dependency and configuring it appropriately.
Steps
1. Add PostgreSQL Helm Repository
First, add the Bitnami repository, which hosts the PostgreSQL Helm chart,
2. Update Chart.yaml
Open your existing Helm chart directory and edit the Chart.yaml file to add PostgreSQL as a dependency,
3. Update values.yaml
Create or update the values.yaml file to include configuration values for PostgreSQL. You can customize the values based on your requirements. Refer to https://github.com/bitnami/charts/blob/main/bitnami/postgresql/README.md#parameters for all configuration options provided by PostgresSql helm chart.
Over-provisioning on disk size (primary.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,
5. Update Your Application Deployment
Modify your application’s deployment files to include the PostgreSQL service. Ensure your application can connect to
PostgreSQL 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 PostgreSQL pod is running,
You should see a pod for PostgreSQL, something like your-app-postgresql-0
.
Congratulations! You have successfully added PostgreSQL to your existing Helm chart. This integration allows your application to use PostgreSQL as its database, managed efficiently with Helm. You can further customize the PostgreSQL configuration by modifying the values.yaml file as needed.