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

File: ./deployment.yaml

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

File: ./service.yaml

apiVersion: v1
kind: Service
metadata:
  name: MYAPP
  labels:
    app: nginx
spec:
  type: ClusterIP
  ports:
  - port: 80
  selector:
    app: nginx

File: ./kustomization.yaml

resources:
- deployment.yaml
- service.yaml

If you're using https://kustomize.io/, you can do this trick in a CI:

sh '( echo "images:" ; echo "  - name: $IMAGE" ; echo "    newTag: $VERSION" ) >> ./kustomization.yaml'
sh "kubectl apply --kustomize ."