Simply DNS webhook service for cert-manager support

This service can be installed side by side with cert manager and can be used to handle dns-01 challeneges provided by cert manager. All documentation on how to configure dns-01 chalanges can be found at cert-manager.io

Version support:

The version compatibility I have tested for can be seen below:

cert-manager version	simply-dns-webhook version
1.9.x	1.0.x
1.10.x	1.1.x
1.11.x	1.2.x
1.12.x	1.3.x
1.13.x	1.4.x
1.14.x	1.5.x
1.15.x	1.6.x

Platfom support:

The folowing architectures are supported by 1.14.x and newer: linux/amd64, linux/arm64, linux/arm, linux/arm/v6, linux/386

Deploy

Helm chart:

Add repo:

    helm repo add simply-dns-webhook https://runnerm.github.io/simply-dns-webhook/

Then:

    helm install my-simply-dns-webhook simply-dns-webhook/simply-dns-webhook --version <version>

As sub-chart:

    dependencies:
        - name: simply-dns-webhook
          version: <version>
          repository: https://runnerm.github.io/simply-dns-webhook/
          alias: simply-dns-webhook

Usage:

Credentials secret: You have to create the secret containing your simply.com api credential on your own, and it's name has to match with the secret ref name provided in the config of the cert-manager issuer/cluster issuer.

Issuer/ClusterIssuer:

    apiVersion: cert-manager.io/v1
    kind: ClusterIssuer
    metadata:
        name: letsencrypt-nginx
    spec:
        acme:
            email: <your_acme_email>
            server: https://acme-v02.api.letsencrypt.org/directory
            privateKeySecretRef:
                name: letsencrypt-nginx-private-key
            solvers:
            - dns01:
                webhook:
                    groupName: com.github.runnerm.cert-manager-simply-webhook
                    solverName: simply-dns-solver
                    config:
                        secretName: simply-credentials # notice the name
              selector:
                dnsZones:
                - '<your_domain>'

Credentials in config: You may choose to use the webhook configuration directly as shown below. (use it at your own risk)

-              secretName: simply-credentials # notice the name
+              accountName: "<account-name>"
+              apiKey: "<api-key>"

Secret

    apiVersion: v1
    kind: Secret
    data:
        account-name: <your_account_name>
        api-key: <your_api_key>
    metadata:
        name: simply-credentials # notice the name
        namespace: <namespace-where-cert-manager-is-installed>
    type: Opaque

cert-manager namespace:

You may override values with your own values if you choose to install cert-manager in custom namespace as follows (this is necessary for proper functioning):

    simply-dns-webhook:
        certManager:
            namespace: <cert-manager-namespace>
            serviceAccountName: <cert-manager-namespace>

Resources:

I leave the choice of the resource constraints to you since you know what you run the service on. ;)

    simply-dns-webhook:
        resources: 
            limits:
                cpu: 100m  
                memory: 128Mi
            requests:
                cpu: 100m
                memory: 128Mi

Logging:

You may choose to elevate level logging to debug by setting the following values:

    simply-dns-webhook:
        logLevel: DEBUG

Debug level gives you a bit more context when debugging your setup. Default log level is INFO.

Running the test suite:

Update the config or the simply-credentials secret with your API credentials and run:

$ TEST_ZONE_NAME=example.com. make test

Parameters

The following table lists the configurable parameters of the simply-dns-webhook chart, and their default values.

Parameter	Description	Default
groupName	Group name for the webhook	com.github.runnerm.cert-manager-simply-webhook
debugLevel	Logging level	INFO
certManager.namespace	cert-manager namespace	cert-manager
certManager.serviceAccountName	cert-manager service account name	cert-manager
image.repository	Docker image repository	deyaeddin/cert-manager-webhook-hetzner
image.tag	Docker image tag	v1.4.0
image.pullPolicy	Docker image pull policy	IfNotPresent
nameOverride	Name override for the chart	""
fullnameOverride	Full name override for the chart	""
service.type	Service type	ClusterIP
service.port	Service port	443
resources	Pod resources	Check values.yaml file
nodeSelector	Node selector	nil
tolerations	Node toleration	nil
affinity	Node affinity	nil

Special credits to: Keyhole Aps