Cert-Manager is not issuing any certificates Google Cloud Kubernetes - kubernetes

Question

I am struggling to get cert-manager to issue certificates from let's encrypt which I can use with my ingress in Google Cloud Kubernetes.
I have a cluster running with a deployment, service and ingress in the default namespace. I also registered a domain at namecheap and added an A record to the IP address from my ingress. Now I can access the website with http and everything is fine. Now I want to move to https and things do not work.
I have installed cert-manager:
kubectl create namespace cert-manager
kubectl apply --validate=false -f https://github.com/jetstack/cert-manager/releases/download/v0.13.1/cert-manager.yaml
I verified that cert-manager is running:
kubectl get pods --namespace cert-manager
NAME READY STATUS RESTARTS AGE
cert-manager-5655447474-kw9k7 1/1 Running 0 99m
cert-manager-cainjector-59c9dfd4f7-fjzbf 1/1 Running 0 99m
cert-manager-webhook-865b8fb666-7kmx2 1/1 Running 0 99m
Now I created a ClusterIssuer kubectl apply -f letsencrypt-prod.yaml in the default namespace:
apiVersion: certmanager.k8s.io/v1alpha1
kind: ClusterIssuer
metadata:
name: letsencrypt-prod
spec:
acme:
server: https://acme-v02.api.letsencrypt.org/directory
email: 'my#email.com'
privateKeySecretRef:
name: letsencrypt-prod
http01: {}
And added a certificate with kubectl apply -f certificate.yaml:
apiVersion: certmanager.k8s.io/v1alpha1
kind: Certificate
metadata:
name: my-certs
spec:
secretName: my-certs
issuerRef:
name: letsencrypt-prod
kind: ClusterIssuer
commonName: "www.mydomain.de"
dnsNames:
- "www.mydomain.de"
acme:
config:
- dns01:
provider: cloud-dns
domains:
- "www.mydomain.de"
This is my ingress:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: my-ingress
annotations:
kubernetes.io/ingress.global-static-ip-name: "my-ip"
spec:
rules:
- host: www.mydomain.de
http:
paths:
- backend:
serviceName: my-service
servicePort: 80
tls:
- hosts:
- www.mydomain.de
secretName: my-certs
Now when I run kubectl describe certificate my-certs there are no events:
kubectl describe certificate my-certs
Name: my-certs
Namespace: default
Labels: <none>
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"certmanager.k8s.io/v1alpha1","kind":"Certificate","metadata":{"annotations":{},"name":"my-certs","namespace":"default"},"sp...
API Version: certmanager.k8s.io/v1alpha1
Kind: Certificate
Metadata:
Creation Timestamp: 2020-02-23T13:30:15Z
Generation: 1
Resource Version: 787204
Self Link: /apis/certmanager.k8s.io/v1alpha1/namespaces/default/certificates/my-certs
UID: a027a698-5640-11ea-bce8-42010a9c00dc
Spec:
Acme:
Config:
Dns 01:
Provider: cloud-dns
Domains:
www.mydomain.de
Common Name: www.mydomain.de
Dns Names:
www.mydomain.de
Issuer Ref:
Kind: ClusterIssuer
Name: letsencrypt-prod
Secret Name: my-certs
Events: <none>
And in Google Cloud Console I see the message "Could not find TLS certificates. Continuing setup for the load balancer to serve HTTP" for the ingress.
What is wrong here or what am I missing?

Answer 1

Instead of creating the certificate resource manually you can add below annotation to the ingress resource:
cert-manager.io/issuer: "letsencrypt-prod"
Cert-manager will read the annotation and use them to create a certificate.
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: my-ingress
annotations:
kubernetes.io/ingress.global-static-ip-name: "my-ip"
cert-manager.io/cluster-issuer: "letsencrypt-prod"
spec:
rules:
- host: www.mydomain.de
http:
paths:
- backend:
serviceName: my-service
servicePort: 80
tls:
- hosts:
- www.mydomain.de
secretName: my-certs
After this check if a secret and certificate with name my-certs got created or not.
Also check the related issue