I used envsubst (https://www.gnu.org/software/gettext/manual/html_node/envsubst-Invocation.html) for this. Create a deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: $NAME
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
Then:
export NAME=my-test-nginx
envsubst < deployment.yaml | kubectl apply -f -
Not sure what OS are you using to run this. On macOS, envsubst installed like:
brew install gettext
brew link --force gettext