cert-manager: no configured challenge solvers can be used for this challenge

Question

I followed this instruction to set up a cert manager on my EKS cluster https://cert-manager.io/docs/tutorials/acme/ingress/.

here is my ingress

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: test
  annotations:
    kubernetes.io/ingress.class: "nginx"
    cert-manager.io/issuer: "letsencrypt-staging"
spec:
  tls:
  - hosts:
      - '*.test.com'
    secretName: test-tls
  rules:
    - http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: test-service
                port:
                  number: 80

Here is the issuer. I just copied the config from the instruction

apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
  name: letsencrypt-staging
spec:
  acme:
    server: https://acme-staging-v02.api.letsencrypt.org/directory
    email: [email protected]
    privateKeySecretRef:
      name: letsencrypt-staging
    solvers:
      - http01:
          ingress:
            class: nginx

After deployment, I found the certificate ready state is false

kubectl get certificate
NAME          READY   SECRET        AGE
test-tls   False   test-tls   2m45s

Then I followed this to troubleshoot https://cert-manager.io/docs/faq/troubleshooting/

I ran kubectl describe certificaterequest <request name>, found error Waiting on certificate issuance from order test-tls-xxx: "pending"

then ran kubectl describe order test-tls-xxx, found error Warning Solver 20m cert-manager Failed to determine a valid solver configuration for the set of domains on the Order: no configured challenge solvers can be used for this challenge.

Any idea why it couldn't determine a valid solver? how do I test if solver is working?

Harsh Manvar Harsh Manvar · Accepted Answer · 2021-07-02T03:56:46

It's not working due you are using the staging URL in cluster issuer to verify the image.

Please try with the Production URL.

here a simple and proper example of Clusterissuer and ingress YAML (do note you were trying with staging API https://acme-staging-v02.api.letsencrypt.org/directory if possible use the production server address so it works properly with all browsers)

Example:

apiVersion: cert-manager.io/v1alpha2
kind: ClusterIssuer
metadata:
  name: cluster-issuer-name
  namespace: development
spec:
  acme:
    server: https://acme-v02.api.letsencrypt.org/directory
    email: [email protected]
    privateKeySecretRef:
      name: secret-name
    solvers:
    - http01:
        ingress:
          class: nginx-class-name
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: nginx-class-name
    cert-manager.io/cluster-issuer: cluster-issuer-name
    nginx.ingress.kubernetes.io/rewrite-target: /
  name: example-ingress
spec:
  rules:
  - host: sub.example.com
    http:
      paths:
      - path: /api
        backend:
          serviceName: service-name
          servicePort: 80
  tls:
  - hosts:
    - sub.example.com
    secretName: secret-name

Note : When you are trying again please try deleting the old objects like ingress, Clusterissuer first.

cert-manager: no configured challenge solvers can be used for this challenge

1 Answers