apiVersion: v1
kind: Namespace
metadata:
  name: demo
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-settings
  namespace: demo
data:
  default.conf: |
    server {
      listen 8080;
      location / {
        default_type text/plain;
        return 200 "Hello from ConfigMap v1\n";
      }
    }
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo-web
  namespace: demo
spec:
  replicas: 1
  selector:
    matchLabels:
      app: demo-web
  template:
    metadata:
      labels:
        app: demo-web
    spec:
      containers:
        - name: nginx
          image: nginx:stable
          ports:
            - containerPort: 8080
          readinessProbe:
            httpGet:
              path: /
              port: 8080
          volumeMounts:
            - name: settings
              mountPath: /etc/nginx/conf.d
              readOnly: true
      volumes:
        - name: settings
          configMap:
            name: nginx-settings
---
apiVersion: v1
kind: Service
metadata:
  name: demo-web
  namespace: demo
spec:
  selector:
    app: demo-web
  ports:
    - port: 80
      targetPort: 8080