Tag: Helm

Simplify Spring Boot Access to Kubernetes Secrets Using Environment Variables

Robert Lohr1 Comment

This blog post is a follow-up to a previous blog post titled “Simplify Spring Boot Access to Secrets Using Spring Cloud Kubernetes“. Despite the downsides I mentioned, I already hinted at a more straightforward solution that utilizes environment variables. The plan is to get everything into the Pod with as little configuration effort as possible.

So, I promised a twist, and here it is, thanks to one of my colleagues who pushed me in this direction. Kubernetes gives you yet another tool to handle Secrets in environment variables. This time, it is more convenient since you only point it to the complete Secret, not just a single value. Kubernetes will then make all key-value pairs available as individual environment variables.

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Simplify Spring Boot Access to Secrets Using Spring Cloud Kubernetes

Robert Lohr1 Comment

This topic has its origin in how we manage Kubernetes Secrets at my workplace. We use Helm for deployments, and we must support several environments with their connection strings, passwords, and other settings. As a result, some things are a bit more complicated, and one of them is the access to Kubernetes Secrets from a Spring Boot application running in a Pod.

This blog post covers the following:

  1. How do you generally get Secrets into a Pod?
  2. How do we currently do it using Helm?
  3. How can it be improved with less configuration?
  4. Any gotchas? Of course, it is software.

I will explain a lot of rationales, so expect a substantial amount of prose between the (code) snippets.

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