apiVersion: apps/v1
kind: Deployment
metadata:
  name: coredns-custom
  namespace: coredns
  labels:
    app: coredns-custom
spec:
  replicas: 2
  selector:
    matchLabels:
      app: coredns-custom
  template:
    metadata:
      labels:
        app: coredns-custom
    spec:
      containers:
        - name: coredns
          image: coredns/coredns:1.11.1
          args: ["-conf", "/etc/coredns/Corefile"]
          ports:
            - name: dns-udp
              containerPort: 53
              protocol: UDP
            - name: dns-tcp
              containerPort: 53
              protocol: TCP
            - name: metrics
              containerPort: 9153
              protocol: TCP
          readinessProbe:
            httpGet: { path: /health, port: 8080 }
            initialDelaySeconds: 3
            periodSeconds: 10
          livenessProbe:
            httpGet: { path: /health, port: 8080 }
            initialDelaySeconds: 10
            periodSeconds: 20
          volumeMounts:
            - name: config
              mountPath: /etc/coredns
      volumes:
        - name: config
          configMap:
            name: coredns-custom
            items:
              - key: Corefile
                path: Corefile