How Do I configure Okteto with cert-manager and Google Cloud DNS?

How do I configure the Okteto wildcard certificate with cert-manager and Google Cloud DNS?

The recommended solution is to use Workload Identity.

You need to create a Service Account in the same Google Cloud project as your GKE cluster. Give it the DNS Administrator roles.

Bind the GCP Service Account you just created with the K8S Service Account of cert-manager. Replace the variables below with your own information.

gcloud iam service-accounts add-iam-policy-binding \
  ${GSA_NAME}@${GSA_PROJECT}.iam.gserviceaccount.com \
  --role roles/iam.workloadIdentityUser \
  --member "serviceAccount:${PROJECT_ID}.svc.id.goog[${RELEASE_NAMESPACE}/certmanager]"

and add these options to your cert-manager Helm configuration file:

  extraArgs: [--issuer-ambient-credentials=true]
  serviceAccount:
    annotations:
      iam.gke.io/gcp-service-account: GSA_NAME@GSA_PROJECT.iam.gserviceaccount.com

Once your cert-manager is configured this way, create the following Issuer in the okteto namespace:

apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
  name: okteto-letsencrypt
spec:
  acme:
    server: https://acme-v02.api.letsencrypt.org/directory
    email:  "<<your-email>>"
    privateKeySecretRef:
      name: okteto-letsencrypt
    solvers:
    - http01:
        ingress:
          serviceType: ClusterIP
          class: nginx
    - dns01:
        cloudDNS:
          project: "<<your-google-project-id>>"

and the following Certificate:

apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
 name: okteto-letsencrypt
spec:
 secretName: okteto-letsencrypt
 duration: 8760h0m0s
 renewBefore: 600h0m0s # 25d
 issuerRef:
   name: okteto-letsencrypt
   kind: Issuer
 dnsNames:
   - "*.<<your-okteto-subdomain>>"

Now, add the following to your Okteto Helm configuration file to tell Okteto and NGINX to use your certificate:

wildcardCertificate:
  create: false
  name: okteto-letsencrypt

ingress-nginx:
  controller:
    extraArgs:
      default-ssl-certificate: $(POD_NAMESPACE)/okteto-letsencrypt

Finally, upgrade your Okteto installation for the new configuration to be applied.