how to pass environment variable in kubectl deployment?

Question

I am setting up the kubernetes setup for django webapp.

I am passing environment variable while creating deployment as below

kubectl create -f deploy         


        

Answer 1

You cannot pass variables to "kubectl create -f". YAML files should be complete manifests without variables. Also you cannot use "-l" flag to "kubectl create -f".

If you want to pass environment variables to pod you should do like that:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        env:
        - name: MY_VAT
          value: MY_VALUE
        ports:
        - containerPort: 80

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