Ingress TLS routes with cert-manager not applied - ssl

Question

I have a K8s cluster (v1.12.8-gke.10) in GKE and have a nginx ingress with hosts rules. I am trying to enable TLS using cert-manager for ingress routes. I am using a selfsign cluster issuer. But, when I access the site over HTTPS, I am still getting the default K8s certificate. (The certificate is only valid for the following names: kubernetes, kubernetes.default, kubernetes.default.svc, kubernetes.default.svc.cluster.local)
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
namespace: test
name: test
annotations:
kubernetes.io/ingress.class: nginx
kubernetes.io/ingress.allow-http: "false"
nginx.ingress.kubernetes.io/rewrite-target: /
certmanager.k8s.io/cluster-issuer: selfsign
spec:
tls:
- secretName: test
hosts:
- test.example.com
rules:
- host: test.example.com
http:
paths:
- path: /
backend:
serviceName: test
servicePort: 80
I have checked the following and is working fine:
A cluster issuer named "selfsign"
A valid self-signed certificate backed by a secret "test"
A healthy and running nginx ingress deployment
A healthy and running ingress service of type load-balancer

Answer 1

I think it's issue of clusterissuer
Just have a look at my cluster issuer and check
apiVersion: certmanager.k8s.io/v1alpha1
kind: ClusterIssuer
metadata:
name: prod
spec:
acme:
# The ACME server URL
server: https://acme-v02.api.letsencrypt.org/directory
# Email address used for ACME registration
email: it-support#something.com
# Name of a secret used to store the ACME account private key
privateKeySecretRef:
name: prod
# Enable the HTTP-01 challenge provider
http01: {}
Check for the right url to get production-grade certificates:
server: https://acme-v02.api.letsencrypt.org/directory
If your server url is something like this :
server: https://acme-staging-v02.api.letsencrypt.org/directory
which means you are applying for the staging certificate which may occur the error.

Answer 2

I've followed the tutorial from Digital Ocean and was able to enable TLS using cert-manager for ingress routes using Helm, Tiller, Letsencrypt and Nginx Ingress controller in GKE.
Instead of host test-example.com, I used my own domain name and spun up dummy backend services (echo1 and echo2) for testing purposes.
After followed the tutorial and to verify that HTTPS is working correctly, try to curl the host:
$ curl test.example.com
you should see a 308 http response (Permanent Redirect). This indicates that HTTP requests are being redirected to use HTTPS.
On the other hand, try running curl on:
$ curl https://test.example.com
Should show you the site response.
You can run the previous commands with the verbose -v flag to check into the certificate handshake and to verify the certificate information.