Bits of .NET

Hardcoding config in containers requires rebuilding images. ConfigMaps separate config from code.

Create ConfigMap:

kubectl create configmap app-config \
  --from-literal=API_URL=https://api.example.com \
  --from-literal=MAX_RETRIES=3

Use in Pod:

apiVersion: v1
kind: Pod
metadata:
  name: myapp
spec:
  containers:
  - name: app
    image: myapp:1.0
    envFrom:
    - configMapRef:
        name: app-config

Change config without rebuilding image – just update ConfigMap!

Update ConfigMap: kubectl edit configmap app-config