k8-env

README

k8-env

A Kubernetes mutating webhook server that implements environnement variable injection.

Prerequisites

A Kubernetes cluster (v1.19+) with the admissionregistration.k8s.io/v1beta1 API enabled. Verify that by the following command :

kubectl api-versions | grep admissionregistration.k8s.io

How to use

1. Create a namespace

Create a namespace with the label env-injection: true :

apiVersion: v1
kind: Namespace
metadata:
  name: my-namespace
  labels:
    env-injection: true

2. Create kustomization configuration

Change the namespace or create a k8-env namespace and create a kustomization.yaml file :

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
namespace: k8-env
resources:
  - https://raw.githubusercontent.com/orange-cloudavenue/k8-env/v0.1.0/manifests/manifests.yaml

images:
- name: k8-env
  newName: ghcr.io/orange-cloudavenue/k8-env
  newTag: v0.1.0

configMapGenerator:
  - name: k8-env
    behavior: replace
    files:
      - envconfig.yaml

3. Create a envconfig.yaml file

Create a envconfig.yaml with the environment variables to inject :

env:
  - name: ENV_VAR_1
    value: "value1"
  - name: ENV_VAR_2
    value: "value2"