scaffold controller

2019-08-21 10:12:07 +02:00 · 2019-08-21 10:12:07 +02:00 · dfb5974746
commit dfb5974746
parent 0ec9dd3218
41 changed files with 1293 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,24 @@
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Kubernetes Generated files - skip generated files, except for vendored files
+
+!vendor/**/zz_generated.*
+
+# editor and IDE paraphernalia
+.idea
+*.swp
+*.swo
+*~
--- a/25
+++ b/25
@ -0,0 +1,25 @@
+# Build the manager binary
+FROM golang:1.12.5 as builder
+
+WORKDIR /workspace
+# Copy the Go Modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+# cache deps before building and copying source so that we don't need to re-download as much
+# and so that source changes don't invalidate our downloaded layer
+RUN go mod download
+
+# Copy the go source
+COPY main.go main.go
+COPY api/ api/
+COPY controllers/ controllers/
+
+# Build
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go
+
+# Use distroless as minimal base image to package the manager binary
+# Refer to https://github.com/GoogleContainerTools/distroless for more details
+FROM gcr.io/distroless/static:latest
+WORKDIR /
+COPY --from=builder /workspace/manager .
+ENTRYPOINT ["/manager"]
--- a/64
+++ b/64
@ -0,0 +1,64 @@
+
+# Image URL to use all building/pushing image targets
+IMG ?= controller:latest
+# Produce CRDs that work back to Kubernetes 1.11 (no version conversion)
+CRD_OPTIONS ?= "crd:trivialVersions=true"
+
+all: manager
+
+# Run tests
+test: generate fmt vet manifests
+	go test ./api/... ./controllers/... -coverprofile cover.out
+
+# Build manager binary
+manager: generate fmt vet
+	go build -o bin/manager main.go
+
+# Run against the configured Kubernetes cluster in ~/.kube/config
+run: generate fmt vet
+	go run ./main.go
+
+# Install CRDs into a cluster
+install: manifests
+	kubectl apply -f config/crd/bases
+
+# Deploy controller in the configured Kubernetes cluster in ~/.kube/config
+deploy: manifests
+	kubectl apply -f config/crd/bases
+	kustomize build config/default | kubectl apply -f -
+
+# Generate manifests e.g. CRD, RBAC etc.
+manifests: controller-gen
+	$(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
+
+# Run go fmt against code
+fmt:
+	go fmt ./...
+
+# Run go vet against code
+vet:
+	go vet ./...
+
+# Generate code
+generate: controller-gen
+	$(CONTROLLER_GEN) object:headerFile=./hack/boilerplate.go.txt paths=./api/...
+
+# Build the docker image
+docker-build: test
+	docker build . -t ${IMG}
+	@echo "updating kustomize image patch file for manager resource"
+	sed -i'' -e 's@image: .*@image: '"${IMG}"'@' ./config/default/manager_image_patch.yaml
+
+# Push the docker image
+docker-push:
+	docker push ${IMG}
+
+# find or download controller-gen
+# download controller-gen if necessary
+controller-gen:
+ifeq (, $(shell which controller-gen))
+	go get sigs.k8s.io/controller-tools/cmd/controller-gen@v0.2.0-beta.2
+CONTROLLER_GEN=$(shell go env GOPATH)/bin/controller-gen
+else
+CONTROLLER_GEN=$(shell which controller-gen)
+endif
--- a/7
+++ b/7
@ -0,0 +1,7 @@
+version: "2"
+domain: ory.sh
+repo: github.com/ory/hydra-maester
+resources:
+- group: hydra
+  version: v1alpha1
+  kind: OAuth2Client
--- a/api/v1alpha1/groupversion_info.go
+++ b/api/v1alpha1/groupversion_info.go
@ -0,0 +1,35 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package v1alpha1 contains API Schema definitions for the hydra v1alpha1 API group
+// +kubebuilder:object:generate=true
+// +groupName=hydra.ory.sh
+package v1alpha1
+
+import (
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/controller-runtime/pkg/scheme"
+)
+
+var (
+	// GroupVersion is group version used to register these objects
+	GroupVersion = schema.GroupVersion{Group: "hydra.ory.sh", Version: "v1alpha1"}
+
+	// SchemeBuilder is used to add go types to the GroupVersionKind scheme
+	SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion}
+
+	// AddToScheme adds the types in this group-version to the given scheme.
+	AddToScheme = SchemeBuilder.AddToScheme
+)
--- a/api/v1alpha1/oauth2client_types.go
+++ b/api/v1alpha1/oauth2client_types.go
@ -0,0 +1,59 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
+// NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
+
+// OAuth2ClientSpec defines the desired state of OAuth2Client
+type OAuth2ClientSpec struct {
+	// INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
+	// Important: Run "make" to regenerate code after modifying this file
+}
+
+// OAuth2ClientStatus defines the observed state of OAuth2Client
+type OAuth2ClientStatus struct {
+	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
+	// Important: Run "make" to regenerate code after modifying this file
+}
+
+// +kubebuilder:object:root=true
+
+// OAuth2Client is the Schema for the oauth2clients API
+type OAuth2Client struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   OAuth2ClientSpec   `json:"spec,omitempty"`
+	Status OAuth2ClientStatus `json:"status,omitempty"`
+}
+
+// +kubebuilder:object:root=true
+
+// OAuth2ClientList contains a list of OAuth2Client
+type OAuth2ClientList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []OAuth2Client `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&OAuth2Client{}, &OAuth2ClientList{})
+}
--- a/api/v1alpha1/oauth2client_types_test.go
+++ b/api/v1alpha1/oauth2client_types_test.go
@ -0,0 +1,76 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"golang.org/x/net/context"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+// These tests are written in BDD-style using Ginkgo framework. Refer to
+// http://onsi.github.io/ginkgo to learn more.
+
+var _ = Describe("OAuth2Client", func() {
+	var (
+		key              types.NamespacedName
+		created, fetched *OAuth2Client
+	)
+
+	BeforeEach(func() {
+		// Add any setup steps that needs to be executed before each test
+	})
+
+	AfterEach(func() {
+		// Add any teardown steps that needs to be executed after each test
+	})
+
+	// Add Tests for OpenAPI validation (or additonal CRD features) specified in
+	// your API definition.
+	// Avoid adding tests for vanilla CRUD operations because they would
+	// test Kubernetes API server, which isn't the goal here.
+	Context("Create API", func() {
+
+		It("should create an object successfully", func() {
+
+			key = types.NamespacedName{
+				Name:      "foo",
+				Namespace: "default",
+			}
+			created = &OAuth2Client{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "foo",
+					Namespace: "default",
+				}}
+
+			By("creating an API obj")
+			Expect(k8sClient.Create(context.TODO(), created)).To(Succeed())
+
+			fetched = &OAuth2Client{}
+			Expect(k8sClient.Get(context.TODO(), key, fetched)).To(Succeed())
+			Expect(fetched).To(Equal(created))
+
+			By("deleting the created object")
+			Expect(k8sClient.Delete(context.TODO(), created)).To(Succeed())
+			Expect(k8sClient.Get(context.TODO(), key, created)).ToNot(Succeed())
+		})
+
+	})
+
+})
--- a/api/v1alpha1/suite_test.go
+++ b/api/v1alpha1/suite_test.go
@ -0,0 +1,74 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	"path/filepath"
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"k8s.io/client-go/kubernetes/scheme"
+	"k8s.io/client-go/rest"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/envtest"
+	logf "sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+)
+
+// These tests use Ginkgo (BDD-style Go testing framework). Refer to
+// http://onsi.github.io/ginkgo/ to learn more about Ginkgo.
+
+var cfg *rest.Config
+var k8sClient client.Client
+var testEnv *envtest.Environment
+
+func TestAPIs(t *testing.T) {
+	RegisterFailHandler(Fail)
+
+	RunSpecsWithDefaultAndCustomReporters(t,
+		"v1alpha1 Suite",
+		[]Reporter{envtest.NewlineReporter{}})
+}
+
+var _ = BeforeSuite(func(done Done) {
+	logf.SetLogger(zap.LoggerTo(GinkgoWriter, true))
+
+	By("bootstrapping test environment")
+	testEnv = &envtest.Environment{
+		CRDDirectoryPaths: []string{filepath.Join("..", "..", "config", "crd", "bases")},
+	}
+
+	err := SchemeBuilder.AddToScheme(scheme.Scheme)
+	Expect(err).NotTo(HaveOccurred())
+
+	cfg, err = testEnv.Start()
+	Expect(err).ToNot(HaveOccurred())
+	Expect(cfg).ToNot(BeNil())
+
+	k8sClient, err = client.New(cfg, client.Options{Scheme: scheme.Scheme})
+	Expect(err).ToNot(HaveOccurred())
+	Expect(k8sClient).ToNot(BeNil())
+
+	close(done)
+}, 60)
+
+var _ = AfterSuite(func() {
+	By("tearing down the test environment")
+	err := testEnv.Stop()
+	Expect(err).ToNot(HaveOccurred())
+})
--- a/api/v1alpha1/zz_generated.deepcopy.go
+++ b/api/v1alpha1/zz_generated.deepcopy.go
@ -0,0 +1,113 @@
+// +build !ignore_autogenerated
+
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// autogenerated by controller-gen object, do not modify manually
+
+package v1alpha1
+
+import (
+	runtime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *OAuth2Client) DeepCopyInto(out *OAuth2Client) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	out.Spec = in.Spec
+	out.Status = in.Status
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new OAuth2Client.
+func (in *OAuth2Client) DeepCopy() *OAuth2Client {
+	if in == nil {
+		return nil
+	}
+	out := new(OAuth2Client)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *OAuth2Client) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *OAuth2ClientList) DeepCopyInto(out *OAuth2ClientList) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	out.ListMeta = in.ListMeta
+	if in.Items != nil {
+		in, out := &in.Items, &out.Items
+		*out = make([]OAuth2Client, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new OAuth2ClientList.
+func (in *OAuth2ClientList) DeepCopy() *OAuth2ClientList {
+	if in == nil {
+		return nil
+	}
+	out := new(OAuth2ClientList)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *OAuth2ClientList) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *OAuth2ClientSpec) DeepCopyInto(out *OAuth2ClientSpec) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new OAuth2ClientSpec.
+func (in *OAuth2ClientSpec) DeepCopy() *OAuth2ClientSpec {
+	if in == nil {
+		return nil
+	}
+	out := new(OAuth2ClientSpec)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *OAuth2ClientStatus) DeepCopyInto(out *OAuth2ClientStatus) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new OAuth2ClientStatus.
+func (in *OAuth2ClientStatus) DeepCopy() *OAuth2ClientStatus {
+	if in == nil {
+		return nil
+	}
+	out := new(OAuth2ClientStatus)
+	in.DeepCopyInto(out)
+	return out
+}
--- a/config/certmanager/certificate.yaml
+++ b/config/certmanager/certificate.yaml
@ -0,0 +1,24 @@
+# The following manifests contain a self-signed issuer CR and a certificate CR.
+# More document can be found at https://docs.cert-manager.io
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: Issuer
+metadata:
+  name: selfsigned-issuer
+  namespace: system
+spec:
+  selfSigned: {}
+---
+apiVersion: certmanager.k8s.io/v1alpha1
+kind: Certificate
+metadata:
+  name: serving-cert  # this name should match the one appeared in kustomizeconfig.yaml
+  namespace: system
+spec:
+  # $(SERVICENAME) and $(NAMESPACE) will be substituted by kustomize
+  commonName: $(SERVICENAME).$(NAMESPACE).svc
+  dnsNames:
+  - $(SERVICENAME).$(NAMESPACE).svc.cluster.local
+  issuerRef:
+    kind: Issuer
+    name: selfsigned-issuer
+  secretName: webhook-server-cert # this secret will not be prefixed, since it's not managed by kustomize
--- a/config/certmanager/kustomization.yaml
+++ b/config/certmanager/kustomization.yaml
@ -0,0 +1,26 @@
+resources:
+- certificate.yaml
+
+# the following config is for teaching kustomize how to do var substitution
+vars:
+- name: NAMESPACE # namespace of the service and the certificate CR
+  objref:
+    kind: Service
+    version: v1
+    name: webhook-service
+  fieldref:
+    fieldpath: metadata.namespace
+- name: CERTIFICATENAME
+  objref:
+    kind: Certificate
+    group: certmanager.k8s.io
+    version: v1alpha1
+    name: serving-cert # this name should match the one in certificate.yaml
+- name: SERVICENAME
+  objref:
+    kind: Service
+    version: v1
+    name: webhook-service
+
+configurations:
+- kustomizeconfig.yaml
--- a/config/certmanager/kustomizeconfig.yaml
+++ b/config/certmanager/kustomizeconfig.yaml
@ -0,0 +1,16 @@
+# This configuration is for teaching kustomize how to update name ref and var substitution 
+nameReference:
+- kind: Issuer
+  group: certmanager.k8s.io
+  fieldSpecs:
+  - kind: Certificate
+    group: certmanager.k8s.io
+    path: spec/issuerRef/name
+
+varReference:
+- kind: Certificate
+  group: certmanager.k8s.io
+  path: spec/commonName
+- kind: Certificate
+  group: certmanager.k8s.io
+  path: spec/dnsNames
--- a/config/crd/kustomization.yaml
+++ b/config/crd/kustomization.yaml
@ -0,0 +1,19 @@
+# This kustomization.yaml is not intended to be run by itself,
+# since it depends on service name and namespace that are out of this kustomize package.
+# It should be run by config/default
+resources:
+- bases/hydra.ory.sh_oauth2clients.yaml
+# +kubebuilder:scaffold:crdkustomizeresource
+
+patches:
+# [WEBHOOK] patches here are for enabling the conversion webhook for each CRD
+#- patches/webhook_in_oauth2clients.yaml
+# +kubebuilder:scaffold:crdkustomizewebhookpatch
+
+# [CAINJECTION] patches here are for enabling the CA injection for each CRD
+#- patches/cainjection_in_oauth2clients.yaml
+# +kubebuilder:scaffold:crdkustomizecainjectionpatch
+
+# the following config is for teaching kustomize how to do kustomization for CRDs.
+configurations:
+- kustomizeconfig.yaml
--- a/config/crd/kustomizeconfig.yaml
+++ b/config/crd/kustomizeconfig.yaml
@ -0,0 +1,17 @@
+# This file is for teaching kustomize how to substitute name and namespace reference in CRD
+nameReference:
+- kind: Service
+  version: v1
+  fieldSpecs:
+  - kind: CustomResourceDefinition
+    group: apiextensions.k8s.io
+    path: spec/conversion/webhookClientConfig/service/name
+
+namespace:
+- kind: CustomResourceDefinition
+  group: apiextensions.k8s.io
+  path: spec/conversion/webhookClientConfig/service/namespace
+  create: false
+
+varReference:
+- path: metadata/annotations
--- a/config/crd/patches/cainjection_in_oauth2clients.yaml
+++ b/config/crd/patches/cainjection_in_oauth2clients.yaml
@ -0,0 +1,8 @@
+# The following patch adds a directive for certmanager to inject CA into the CRD
+# CRD conversion requires k8s 1.13 or later.
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    certmanager.k8s.io/inject-ca-from: $(NAMESPACE)/$(CERTIFICATENAME)
+  name: oauth2clients.hydra.ory.sh
--- a/config/crd/patches/webhook_in_oauth2clients.yaml
+++ b/config/crd/patches/webhook_in_oauth2clients.yaml
@ -0,0 +1,17 @@
+# The following patch enables conversion webhook for CRD
+# CRD conversion requires k8s 1.13 or later.
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  name: oauth2clients.hydra.ory.sh
+spec:
+  conversion:
+    strategy: Webhook
+    webhookClientConfig:
+      # this is "\n" used as a placeholder, otherwise it will be rejected by the apiserver for being blank,
+      # but we're going to set it later using the cert-manager (or potentially a patch if not using cert-manager)
+      caBundle: Cg==
+      service:
+        namespace: system
+        name: webhook-service
+        path: /convert
--- a/config/default/kustomization.yaml
+++ b/config/default/kustomization.yaml
@ -0,0 +1,43 @@
+# Adds namespace to all resources.
+namespace: hydra-maester-system
+
+# Value of this field is prepended to the
+# names of all resources, e.g. a deployment named
+# "wordpress" becomes "alices-wordpress".
+# Note that it should also match with the prefix (text before '-') of the namespace
+# field above.
+namePrefix: hydra-maester-
+
+# Labels to add to all resources and selectors.
+#commonLabels:
+#  someName: someValue
+
+bases:
+- ../crd
+- ../rbac
+- ../manager
+# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in crd/kustomization.yaml
+#- ../webhook
+# [CERTMANAGER] To enable cert-manager, uncomment next line. 'WEBHOOK' components are required.
+#- ../certmanager
+
+patches:
+- manager_image_patch.yaml
+  # Protect the /metrics endpoint by putting it behind auth.
+  # Only one of manager_auth_proxy_patch.yaml and
+  # manager_prometheus_metrics_patch.yaml should be enabled.
+- manager_auth_proxy_patch.yaml
+  # If you want your controller-manager to expose the /metrics
+  # endpoint w/o any authn/z, uncomment the following line and
+  # comment manager_auth_proxy_patch.yaml.
+  # Only one of manager_auth_proxy_patch.yaml and
+  # manager_prometheus_metrics_patch.yaml should be enabled.
+#- manager_prometheus_metrics_patch.yaml
+
+# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in crd/kustomization.yaml
+#- manager_webhook_patch.yaml
+
+# [CAINJECTION] Uncomment next line to enable the CA injection in the admission webhooks.
+# Uncomment 'CAINJECTION' in crd/kustomization.yaml to enable the CA injection in the admission webhooks.
+# 'CERTMANAGER' needs to be enabled to use ca injection
+#- webhookcainjection_patch.yaml
--- a/config/default/manager_auth_proxy_patch.yaml
+++ b/config/default/manager_auth_proxy_patch.yaml
@ -0,0 +1,24 @@
+# This patch inject a sidecar container which is a HTTP proxy for the controller manager,
+# it performs RBAC authorization against the Kubernetes API using SubjectAccessReviews.
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+spec:
+  template:
+    spec:
+      containers:
+      - name: kube-rbac-proxy
+        image: gcr.io/kubebuilder/kube-rbac-proxy:v0.4.0
+        args:
+        - "--secure-listen-address=0.0.0.0:8443"
+        - "--upstream=http://127.0.0.1:8080/"
+        - "--logtostderr=true"
+        - "--v=10"
+        ports:
+        - containerPort: 8443
+          name: https
+      - name: manager
+        args:
+        - "--metrics-addr=127.0.0.1:8080"
--- a/config/default/manager_image_patch.yaml
+++ b/config/default/manager_image_patch.yaml
@ -0,0 +1,12 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+spec:
+  template:
+    spec:
+      containers:
+      # Change the value of image field below to your controller image URL
+      - image: IMAGE_URL
+        name: manager
--- a/config/default/manager_prometheus_metrics_patch.yaml
+++ b/config/default/manager_prometheus_metrics_patch.yaml
@ -0,0 +1,19 @@
+# This patch enables Prometheus scraping for the manager pod.
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+spec:
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: 'true'
+    spec:
+      containers:
+      # Expose the prometheus metrics on default port
+      - name: manager
+        ports:
+        - containerPort: 8080
+          name: metrics
+          protocol: TCP
--- a/config/default/manager_webhook_patch.yaml
+++ b/config/default/manager_webhook_patch.yaml
@ -0,0 +1,23 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+spec:
+  template:
+    spec:
+      containers:
+      - name: manager
+        ports:
+        - containerPort: 443
+          name: webhook-server
+          protocol: TCP
+        volumeMounts:
+        - mountPath: /tmp/k8s-webhook-server/serving-certs
+          name: cert
+          readOnly: true
+      volumes:
+      - name: cert
+        secret:
+          defaultMode: 420
+          secretName: webhook-server-cert
--- a/config/default/webhookcainjection_patch.yaml
+++ b/config/default/webhookcainjection_patch.yaml
@ -0,0 +1,15 @@
+# This patch add annotation to admission webhook config and
+# the variables $(NAMESPACE) and $(CERTIFICATENAME) will be substituted by kustomize.  
+apiVersion: admissionregistration.k8s.io/v1beta1
+kind: MutatingWebhookConfiguration
+metadata:
+  name: mutating-webhook-configuration
+  annotations:
+    certmanager.k8s.io/inject-ca-from: $(NAMESPACE)/$(CERTIFICATENAME)
+---
+apiVersion: admissionregistration.k8s.io/v1beta1
+kind: ValidatingWebhookConfiguration
+metadata:
+  name: validating-webhook-configuration
+  annotations:
+    certmanager.k8s.io/inject-ca-from: $(NAMESPACE)/$(CERTIFICATENAME)
--- a/config/manager/kustomization.yaml
+++ b/config/manager/kustomization.yaml
@ -0,0 +1,2 @@
+resources:
+- manager.yaml
--- a/config/manager/manager.yaml
+++ b/config/manager/manager.yaml
@ -0,0 +1,39 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  labels:
+    control-plane: controller-manager
+  name: system
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+  labels:
+    control-plane: controller-manager
+spec:
+  selector:
+    matchLabels:
+      control-plane: controller-manager
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        control-plane: controller-manager
+    spec:
+      containers:
+      - command:
+        - /manager
+        args:
+        - --enable-leader-election
+        image: controller:latest
+        name: manager
+        resources:
+          limits:
+            cpu: 100m
+            memory: 30Mi
+          requests:
+            cpu: 100m
+            memory: 20Mi
+      terminationGracePeriodSeconds: 10
--- a/config/rbac/auth_proxy_role.yaml
+++ b/config/rbac/auth_proxy_role.yaml
@ -0,0 +1,13 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: proxy-role
+rules:
+- apiGroups: ["authentication.k8s.io"]
+  resources:
+  - tokenreviews
+  verbs: ["create"]
+- apiGroups: ["authorization.k8s.io"]
+  resources:
+  - subjectaccessreviews
+  verbs: ["create"]
--- a/config/rbac/auth_proxy_role_binding.yaml
+++ b/config/rbac/auth_proxy_role_binding.yaml
@ -0,0 +1,12 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: proxy-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: proxy-role
+subjects:
+- kind: ServiceAccount
+  name: default
+  namespace: system
--- a/config/rbac/auth_proxy_service.yaml
+++ b/config/rbac/auth_proxy_service.yaml
@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    prometheus.io/port: "8443"
+    prometheus.io/scheme: https
+    prometheus.io/scrape: "true"
+  labels:
+    control-plane: controller-manager
+  name: controller-manager-metrics-service
+  namespace: system
+spec:
+  ports:
+  - name: https
+    port: 8443
+    targetPort: https
+  selector:
+    control-plane: controller-manager
--- a/config/rbac/kustomization.yaml
+++ b/config/rbac/kustomization.yaml
@ -0,0 +1,11 @@
+resources:
+- role.yaml
+- role_binding.yaml
+- leader_election_role.yaml
+- leader_election_role_binding.yaml
+# Comment the following 3 lines if you want to disable
+# the auth proxy (https://github.com/brancz/kube-rbac-proxy)
+# which protects your /metrics endpoint.
+- auth_proxy_service.yaml
+- auth_proxy_role.yaml
+- auth_proxy_role_binding.yaml
--- a/config/rbac/leader_election_role.yaml
+++ b/config/rbac/leader_election_role.yaml
@ -0,0 +1,26 @@
+# permissions to do leader election.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: leader-election-role
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - configmaps
+  verbs:
+  - get
+  - list
+  - watch
+  - create
+  - update
+  - patch
+  - delete
+- apiGroups:
+  - ""
+  resources:
+  - configmaps/status
+  verbs:
+  - get
+  - update
+  - patch
--- a/config/rbac/leader_election_role_binding.yaml
+++ b/config/rbac/leader_election_role_binding.yaml
@ -0,0 +1,12 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: leader-election-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: leader-election-role
+subjects:
+- kind: ServiceAccount
+  name: default
+  namespace: system
--- a/config/rbac/role_binding.yaml
+++ b/config/rbac/role_binding.yaml
@ -0,0 +1,12 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: manager-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: manager-role
+subjects:
+- kind: ServiceAccount
+  name: default
+  namespace: system
--- a/config/samples/hydra_v1alpha1_oauth2client.yaml
+++ b/config/samples/hydra_v1alpha1_oauth2client.yaml
@ -0,0 +1,7 @@
+apiVersion: hydra.ory.sh/v1alpha1
+kind: OAuth2Client
+metadata:
+  name: oauth2client-sample
+spec:
+  # Add fields here
+  foo: bar
--- a/config/webhook/kustomization.yaml
+++ b/config/webhook/kustomization.yaml
@ -0,0 +1,6 @@
+resources:
+- manifests.yaml
+- service.yaml
+
+configurations:
+- kustomizeconfig.yaml
--- a/config/webhook/kustomizeconfig.yaml
+++ b/config/webhook/kustomizeconfig.yaml
@ -0,0 +1,25 @@
+# the following config is for teaching kustomize where to look at when substituting vars.
+# It requires kustomize v2.1.0 or newer to work properly.
+nameReference:
+- kind: Service
+  version: v1
+  fieldSpecs:
+  - kind: MutatingWebhookConfiguration
+    group: admissionregistration.k8s.io
+    path: webhooks/clientConfig/service/name
+  - kind: ValidatingWebhookConfiguration
+    group: admissionregistration.k8s.io
+    path: webhooks/clientConfig/service/name
+
+namespace:
+- kind: MutatingWebhookConfiguration
+  group: admissionregistration.k8s.io
+  path: webhooks/clientConfig/service/namespace
+  create: true
+- kind: ValidatingWebhookConfiguration
+  group: admissionregistration.k8s.io
+  path: webhooks/clientConfig/service/namespace
+  create: true
+
+varReference:
+- path: metadata/annotations
--- a/config/webhook/service.yaml
+++ b/config/webhook/service.yaml
@ -0,0 +1,12 @@
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: webhook-service
+  namespace: system
+spec:
+  ports:
+    - port: 443
+      targetPort: 443
+  selector:
+    control-plane: controller-manager
--- a/controllers/oauth2client_controller.go
+++ b/controllers/oauth2client_controller.go
@ -0,0 +1,50 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package controllers
+
+import (
+	"context"
+
+	"github.com/go-logr/logr"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	hydrav1alpha1 "github.com/ory/hydra-maester/api/v1alpha1"
+)
+
+// OAuth2ClientReconciler reconciles a OAuth2Client object
+type OAuth2ClientReconciler struct {
+	client.Client
+	Log logr.Logger
+}
+
+// +kubebuilder:rbac:groups=hydra.ory.sh,resources=oauth2clients,verbs=get;list;watch;create;update;patch;delete
+// +kubebuilder:rbac:groups=hydra.ory.sh,resources=oauth2clients/status,verbs=get;update;patch
+
+func (r *OAuth2ClientReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
+	_ = context.Background()
+	_ = r.Log.WithValues("oauth2client", req.NamespacedName)
+
+	// your logic here
+
+	return ctrl.Result{}, nil
+}
+
+func (r *OAuth2ClientReconciler) SetupWithManager(mgr ctrl.Manager) error {
+	return ctrl.NewControllerManagedBy(mgr).
+		For(&hydrav1alpha1.OAuth2Client{}).
+		Complete(r)
+}
--- a/controllers/suite_test.go
+++ b/controllers/suite_test.go
@ -0,0 +1,78 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package controllers
+
+import (
+	"path/filepath"
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	hydrav1alpha1 "github.com/ory/hydra-maester/api/v1alpha1"
+	"k8s.io/client-go/kubernetes/scheme"
+	"k8s.io/client-go/rest"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/envtest"
+	logf "sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+	// +kubebuilder:scaffold:imports
+)
+
+// These tests use Ginkgo (BDD-style Go testing framework). Refer to
+// http://onsi.github.io/ginkgo/ to learn more about Ginkgo.
+
+var cfg *rest.Config
+var k8sClient client.Client
+var testEnv *envtest.Environment
+
+func TestAPIs(t *testing.T) {
+	RegisterFailHandler(Fail)
+
+	RunSpecsWithDefaultAndCustomReporters(t,
+		"Controller Suite",
+		[]Reporter{envtest.NewlineReporter{}})
+}
+
+var _ = BeforeSuite(func(done Done) {
+	logf.SetLogger(zap.LoggerTo(GinkgoWriter, true))
+
+	By("bootstrapping test environment")
+	testEnv = &envtest.Environment{
+		CRDDirectoryPaths: []string{filepath.Join("..", "config", "crd", "bases")},
+	}
+
+	cfg, err := testEnv.Start()
+	Expect(err).ToNot(HaveOccurred())
+	Expect(cfg).ToNot(BeNil())
+
+	err = hydrav1alpha1.AddToScheme(scheme.Scheme)
+	Expect(err).NotTo(HaveOccurred())
+
+	// +kubebuilder:scaffold:scheme
+
+	k8sClient, err = client.New(cfg, client.Options{Scheme: scheme.Scheme})
+	Expect(err).ToNot(HaveOccurred())
+	Expect(k8sClient).ToNot(BeNil())
+
+	close(done)
+}, 60)
+
+var _ = AfterSuite(func() {
+	By("tearing down the test environment")
+	err := testEnv.Stop()
+	Expect(err).ToNot(HaveOccurred())
+})
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,13 @@
+module github.com/ory/hydra-maester
+
+go 1.12
+
+require (
+	github.com/go-logr/logr v0.1.0
+	github.com/onsi/ginkgo v1.6.0
+	github.com/onsi/gomega v1.4.2
+	golang.org/x/net v0.0.0-20180906233101-161cd47e91fd
+	k8s.io/apimachinery v0.0.0-20190404173353-6a84e37a896d
+	k8s.io/client-go v11.0.1-0.20190409021438-1a26190bd76a+incompatible
+	sigs.k8s.io/controller-runtime v0.2.0-beta.2
+)
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,126 @@
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--- a/hack/boilerplate.go.txt
+++ b/hack/boilerplate.go.txt
@ -0,0 +1,14 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
--- a/main.go
+++ b/main.go
@ -0,0 +1,77 @@
+/*
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"flag"
+	"os"
+
+	hydrav1alpha1 "github.com/ory/hydra-maester/api/v1alpha1"
+	"github.com/ory/hydra-maester/controllers"
+	"k8s.io/apimachinery/pkg/runtime"
+	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+	// +kubebuilder:scaffold:imports
+)
+
+var (
+	scheme   = runtime.NewScheme()
+	setupLog = ctrl.Log.WithName("setup")
+)
+
+func init() {
+
+	hydrav1alpha1.AddToScheme(scheme)
+	// +kubebuilder:scaffold:scheme
+}
+
+func main() {
+	var metricsAddr string
+	var enableLeaderElection bool
+	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
+	flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
+		"Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
+	flag.Parse()
+
+	ctrl.SetLogger(zap.Logger(true))
+
+	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
+		Scheme:             scheme,
+		MetricsBindAddress: metricsAddr,
+		LeaderElection:     enableLeaderElection,
+	})
+	if err != nil {
+		setupLog.Error(err, "unable to start manager")
+		os.Exit(1)
+	}
+
+	err = (&controllers.OAuth2ClientReconciler{
+		Client: mgr.GetClient(),
+		Log:    ctrl.Log.WithName("controllers").WithName("OAuth2Client"),
+	}).SetupWithManager(mgr)
+	if err != nil {
+		setupLog.Error(err, "unable to create controller", "controller", "OAuth2Client")
+		os.Exit(1)
+	}
+	// +kubebuilder:scaffold:builder
+
+	setupLog.Info("starting manager")
+	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
+		setupLog.Error(err, "problem running manager")
+		os.Exit(1)
+	}
+}