apiVersion: v1
kind: Secret
metadata:
  name: godaddy-api-key-prod
  namespace: cert-manager
type: Opaque
data:
  key: <godaddy api key base64 encoded>
  secret: <godaddy api secret base64 encoded>
---  
apiVersion: cert-manager.io/v1
kind: ClusterIssuer
metadata:
  name: letsencrypt-prod
spec:
  acme:
    server: https://acme-v02.api.letsencrypt.org/directory
    email: <your email>
    privateKeySecretRef:
      name: letsencrypt-prod-account-key
    solvers:
    - selector:
        dnsNames:
        - '*.mycompany.com'
      dns01:
        webhook:
          config:
            apiKeySecretRef:
              name: godaddy-api-key-prod
              key: key
              secret: secret
            production: true
            ttl: 600
          groupName: acme.mycompany.com
          solverName: godaddy

apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
  name: wildcard-example-com
spec:
  secretName: wildcard-example-com-tls
  renewBefore: 240h
  dnsNames:
  - '*.example.com'
  issuerRef:
    name: letsencrypt-prod
    kind: ClusterIssuer

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: example-ingress
  namespace: default
  annotations:
    certmanager.k8s.io/cluster-issuer: "letsencrypt-prod"
spec:
  tls:
  - hosts:
    - '*.example.com'
    secretName: wildcard-example-com-tls
  rules:
  - host: demo.example.com
    http:
      paths:
      - path: /
        backend:
          serviceName: backend-service
          servicePort: 80