k8s.github.io

Configure Environment Variables In Applications

• Take me to Video Tutorial

ENV variables in Docker

$ docker run -e APP_COLOR=pink simple-webapp-color

ENV variables in kubernetes

• To set an environment variable set an env property in pod definition file.

  apiVersion: v1
  kind: Pod
  metadata:
    name: simple-webapp-color
  spec:
   containers:
   - name: simple-webapp-color
     image: simple-webapp-color
     ports:
     - containerPort: 8080
     env:
     - name: APP_COLOR
       value: pink
  

  

• There are other ways of setting the environment variables such as ConfigMaps and Secrets

  

K8s Reference Docs

• https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/