fleet-cert-manager/manifests/cert-manager-cluster-issuer.yaml

apiVersion: cert-manager.io/v1  
namespace: default
kind: ClusterIssuer  
metadata:  
  name: letsencrypt-issuer
spec:  
  acme:  
    email: lsitops@lsit.ucsb.edu  
    privateKeySecretRef:  
      name: letsencrypt-key  
    server: https://acme-v02.api.letsencrypt.org/directory  
    solvers:  
      - http01:  
          ingress:  
            ingressClassName: nginx
      - http01:
          ingress:
            ingressClassName: traefik