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https://github.com/cert-manager/webhook-example.git
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Added Better Docs and renamed helm folder
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Tim Dawson
parent
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13 changed files with 304 additions and 51 deletions
2
Makefile
2
Makefile
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@ -35,4 +35,4 @@ rendered-manifest.yaml:
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pdns-webhook \
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--set image.repository=$(IMAGE_NAME) \
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--set image.tag=$(IMAGE_TAG) \
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deploy/example-webhook > "$(OUT)/rendered-manifest.yaml"
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deploy/pdns-webhook > "$(OUT)/rendered-manifest.yaml"
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80
README.md
80
README.md
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@ -1,54 +1,34 @@
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# ACME webhook example
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### Deployment
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The ACME issuer type supports an optional 'webhook' solver, which can be used
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to implement custom DNS01 challenge solving logic.
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Deploy the custom pdns apiextenion using the helm chart in depploy.
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This is useful if you need to use cert-manager with a DNS provider that is not
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officially supported in cert-manager core.
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## Why not in core?
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As the project & adoption has grown, there has been an influx of DNS provider
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pull requests to our core codebase. As this number has grown, the test matrix
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has become un-maintainable and so, it's not possible for us to certify that
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providers work to a sufficient level.
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By creating this 'interface' between cert-manager and DNS providers, we allow
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users to quickly iterate and test out new integrations, and then packaging
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those up themselves as 'extensions' to cert-manager.
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We can also then provide a standardised 'testing framework', or set of
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conformance tests, which allow us to validate the a DNS provider works as
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expected.
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## Creating your own webhook
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Webhook's themselves are deployed as Kubernetes API services, in order to allow
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administrators to restrict access to webhooks with Kubernetes RBAC.
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This is important, as otherwise it'd be possible for anyone with access to your
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webhook to complete ACME challenge validations and obtain certificates.
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To make the set up of these webhook's easier, we provide a template repository
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that can be used to get started quickly.
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### Creating your own repository
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### Running the test suite
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All DNS providers **must** run the DNS01 provider conformance testing suite,
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else they will have undetermined behaviour when used with cert-manager.
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**It is essential that you configure and run the test suite when creating a
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DNS01 webhook.**
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An example Go test file has been provided in [main_test.go](https://github.com/jetstack/cert-manager-webhook-example/blob/master/main_test.go).
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You can run the test suite with:
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```bash
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$ TEST_ZONE_NAME=example.com. make test
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This is how i deployed it.
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```
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oc project cert-manager
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oc apply -f rendered-manifest.yaml
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```
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The example file has a number of areas you must fill in and replace with your
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own options in order for tests to pass.
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### Example Issuer using the staging letsencypt api.
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```
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apiVersion: cert-manager.io/v1
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kind: Issuer
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metadata:
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name: dns-acme-issuer
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spec:
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acme:
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email: user@example.com
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server: https://acme-staging-v02.api.letsencrypt.org/directory
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privateKeySecretRef:
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name: acme-account-secret
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solvers:
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- dns01:
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webhook:
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groupName: acme.powerdns.com
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solverName: powerdns
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config:
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server: "http://powerdnsserverurl:80"
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apikey: supersecret
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```
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273
rendered-manifest.yaml
Normal file
273
rendered-manifest.yaml
Normal file
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@ -0,0 +1,273 @@
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---
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# Source: pdns-webhook/templates/rbac.yaml
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: pdns-webhook
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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---
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# Source: pdns-webhook/templates/rbac.yaml
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# Grant cert-manager permission to validate using our apiserver
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: pdns-webhook:domain-solver
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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rules:
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- apiGroups:
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- acme.powerdns.com
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resources:
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- '*'
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verbs:
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- 'create'
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---
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# Source: pdns-webhook/templates/rbac.yaml
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# apiserver gets the auth-delegator role to delegate auth decisions to
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# the core apiserver
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: pdns-webhook:auth-delegator
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: system:auth-delegator
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subjects:
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- apiGroup: ""
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kind: ServiceAccount
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name: pdns-webhook
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namespace: cert-manager
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---
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# Source: pdns-webhook/templates/rbac.yaml
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: pdns-webhook:domain-solver
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: pdns-webhook:domain-solver
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subjects:
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- apiGroup: ""
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kind: ServiceAccount
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name: cert-manager
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namespace: cert-manager
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---
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# Source: pdns-webhook/templates/rbac.yaml
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# Grant the webhook permission to read the ConfigMap containing the Kubernetes
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# apiserver's requestheader-ca-certificate.
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# This ConfigMap is automatically created by the Kubernetes apiserver.
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apiVersion: rbac.authorization.k8s.io/v1
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kind: RoleBinding
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metadata:
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name: pdns-webhook:webhook-authentication-reader
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namespace: kube-system
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: Role
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name: extension-apiserver-authentication-reader
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subjects:
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- apiGroup: ""
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kind: ServiceAccount
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name: pdns-webhook
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namespace: cert-manager
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---
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# Source: pdns-webhook/templates/service.yaml
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apiVersion: v1
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kind: Service
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metadata:
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name: pdns-webhook
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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spec:
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type: ClusterIP
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ports:
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- port: 443
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targetPort: 8043
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protocol: TCP
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name: https
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selector:
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app: pdns-webhook
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release: pdns-webhook
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---
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# Source: pdns-webhook/templates/deployment.yaml
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: pdns-webhook
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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spec:
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replicas:
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selector:
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matchLabels:
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app: pdns-webhook
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release: pdns-webhook
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template:
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metadata:
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labels:
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app: pdns-webhook
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release: pdns-webhook
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spec:
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serviceAccountName: pdns-webhook
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containers:
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- name: pdns-webhook
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image: "quay.io/tidawson/pdns-webhook:latest"
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imagePullPolicy: Always
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args:
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- --tls-cert-file=/tls/tls.crt
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- --tls-private-key-file=/tls/tls.key
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- --secure-port=8043
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- --audit-log-path=-
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- -v=5
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env:
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- name: GROUP_NAME
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value: "acme.powerdns.com"
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ports:
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- name: https
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containerPort: 8043
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protocol: TCP
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livenessProbe:
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httpGet:
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scheme: HTTPS
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path: /healthz
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port: 8043
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readinessProbe:
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httpGet:
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scheme: HTTPS
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path: /healthz
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port: 8043
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volumeMounts:
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- name: certs
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mountPath: /tls
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readOnly: true
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resources:
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{}
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volumes:
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- name: certs
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secret:
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secretName: pdns-webhook-webhook-tls
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---
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# Source: pdns-webhook/templates/apiservice.yaml
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apiVersion: apiregistration.k8s.io/v1
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kind: APIService
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metadata:
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name: v1alpha1.acme.powerdns.com
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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annotations:
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cert-manager.io/inject-ca-from: "cert-manager/pdns-webhook-webhook-tls"
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spec:
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group: acme.powerdns.com
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groupPriorityMinimum: 1000
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versionPriority: 15
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service:
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name: pdns-webhook
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namespace: cert-manager
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version: v1alpha1
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---
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# Source: pdns-webhook/templates/pki.yaml
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# Generate a CA Certificate used to sign certificates for the webhook
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apiVersion: cert-manager.io/v1
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kind: Certificate
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metadata:
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name: pdns-webhook-ca
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namespace: "cert-manager"
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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spec:
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secretName: pdns-webhook-ca
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duration: 43800h # 5y
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issuerRef:
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name: pdns-webhook-selfsign
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commonName: "ca.example-webhook.cert-manager"
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isCA: true
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---
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# Source: pdns-webhook/templates/pki.yaml
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# Finally, generate a serving certificate for the webhook to use
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apiVersion: cert-manager.io/v1
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kind: Certificate
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metadata:
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name: pdns-webhook-webhook-tls
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namespace: "cert-manager"
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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spec:
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secretName: pdns-webhook-webhook-tls
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duration: 8760h # 1y
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issuerRef:
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name: pdns-webhook-ca
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dnsNames:
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- pdns-webhook
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- pdns-webhook.cert-manager
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- pdns-webhook.cert-manager.svc
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---
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# Source: pdns-webhook/templates/pki.yaml
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# Create a selfsigned Issuer, in order to create a root CA certificate for
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# signing webhook serving certificates
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apiVersion: cert-manager.io/v1
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kind: Issuer
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metadata:
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name: pdns-webhook-selfsign
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namespace: "cert-manager"
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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spec:
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selfSigned: {}
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---
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# Source: pdns-webhook/templates/pki.yaml
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# Create an Issuer that uses the above generated CA certificate to issue certs
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apiVersion: cert-manager.io/v1
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kind: Issuer
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metadata:
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name: pdns-webhook-ca
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namespace: "cert-manager"
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labels:
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app: pdns-webhook
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chart: pdns-webhook-0.1.0
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release: pdns-webhook
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heritage: Helm
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spec:
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ca:
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secretName: pdns-webhook-ca
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