apiVersion: cert-manager.io/v1alpha2
kind: ClusterIssuer
metadata:
  name: letsencrypt-production
spec:
  acme:
    # The ACME server URL
    server: https://acme-v02.api.letsencrypt.org/directory
    # Email address used for ACME registration
    email: @acme_email@
    # Name of a secret used to store the ACME account private key
    privateKeySecretRef:
      name: letsencrypt-production
    solvers:
    - http01:
        ingress:
          class: nginx

---
apiVersion: cert-manager.io/v1alpha2
kind: ClusterIssuer
metadata:
  name: ca-issuer
spec:
  ca:
    secretName: cluster-ca
---
apiVersion: cert-manager.io/v1alpha2
kind: ClusterIssuer
metadata:
  name: selfsigning-issuer
spec:
  selfSigned: {}