cert-manager-webhook-dnsimple

README

OVH Webhook for Cert Manager

This is a webhook solver for dnsimple.

Prerequisites

• cert-manager version 0.13.0 or higher (tested with 0.14.0):
  • Installing on Kubernetes

Installation

Choose a unique group name to identify your company or organization (for example acme.mycompany.example).

helm install ./deploy/dnsimple-webhook \
 --set groupName='<YOUR_UNIQUE_GROUP_NAME>'

If you customized the installation of cert-manager, you may need to also set the certManager.namespace and certManager.serviceAccountName values.

Issuer

1. Create a new OVH API key with the following rights:

   • GET /domain/zone/*
   • PUT /domain/zone/*
   • POST /domain/zone/*
   • DELETE /domain/zone/*

2. Create a secret to store your application secret:

   kubectl create secret generic ovh-credentials \
     --from-literal=applicationSecret='<OVH_APPLICATION_SECRET>'
   

3. Grant permission to get the secret to the dnsimple-webhook service account:

   apiVersion: rbac.authorization.k8s.io/v1
   kind: Role
   metadata:
     name: dnsimple-webhook:secret-reader
   rules:
   - apiGroups: [""]
     resources: ["secrets"]
     resourceNames: ["ovh-credentials"]
     verbs: ["get", "watch"]
   ---
   apiVersion: rbac.authorization.k8s.io/v1beta1
   kind: RoleBinding
   metadata:
     name: dnsimple-webhook:secret-reader
   roleRef:
     apiGroup: rbac.authorization.k8s.io
     kind: Role
     name: dnsimple-webhook:secret-reader
   subjects:
   - apiGroup: ""
     kind: ServiceAccount
     name: dnsimple-webhook
   

4. Create a certificate issuer:

   apiVersion: certmanager.k8s.io/v1alpha1
   kind: Issuer
   metadata:
     name: letsencrypt
   spec:
     acme:
       server: https://acme-v02.api.letsencrypt.org/directory
       email: '<YOUR_EMAIL_ADDRESS>'
       privateKeySecretRef:
         name: letsencrypt-account-key
       solvers:
       - dns01:
           webhook:
             groupName: '<YOUR_UNIQUE_GROUP_NAME>'
             solverName: ovh
             config:
               endpoint: ovh-eu
               applicationKey: '<OVH_APPLICATION_KEY>'
               applicationSecretRef:
                 key: applicationSecret
                 name: ovh-credentials
               consumerKey: '<OVH_CONSUMER_KEY>'
   

Certificate

Issue a certificate:

apiVersion: certmanager.k8s.io/v1alpha1
kind: Certificate
metadata:
  name: example-com
spec:
  dnsNames:
  - example.com
  - *.example.com
  issuerRef:
    name: letsencrypt
  secretName: example-com-tls

Development

All DNS providers must run the DNS01 provider conformance testing suite, else they will have undetermined behaviour when used with cert-manager.

It is essential that you configure and run the test suite when creating a DNS01 webhook.

An example Go test file has been provided in main_test.go.

Before you can run the test suite, you need to download the test binaries:

./scripts/fetch-test-binaries.sh

Then duplicate the .sample files in testdata/ovh/ and update the configuration with the appropriate OVH credentials.

Now you can run the test suite with:

TEST_ZONE_NAME=example.com. go test .