feat: inject bundle data into configmap

Signed-off-by: Erik Godding Boye <[email protected]>

pkg/bundle/inject/controller.go

@@ -0,0 +1,112 @@
+/*
+Copyright 2021 The cert-manager Authors.
+
+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 inject
+
+import (
+ "context"
+ "crypto/sha256"
+ "fmt"
+
+ metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+ "k8s.io/apimachinery/pkg/runtime"
+ v1 "k8s.io/client-go/applyconfigurations/core/v1"
+ ctrl "sigs.k8s.io/controller-runtime"
+ "sigs.k8s.io/controller-runtime/pkg/builder"
+ "sigs.k8s.io/controller-runtime/pkg/client"
+ "sigs.k8s.io/controller-runtime/pkg/predicate"
+ "sigs.k8s.io/controller-runtime/pkg/reconcile"
+
+ "github.com/cert-manager/trust-manager/pkg/apis/trust/v1alpha1"
+ "github.com/cert-manager/trust-manager/pkg/bundle/internal/ssa_client"
+)
+
+const (
+ BundleInjectLabelKey = "trust-manager.io/inject-bundle"
+
+ fieldManager = "trust-manager-injector"
+)
+
+var configMap = &metav1.PartialObjectMetadata{TypeMeta: metav1.TypeMeta{APIVersion: "v1", Kind: "ConfigMap"}}
+
+type Injector struct {
+ client.Client
+ Scheme *runtime.Scheme
+}
+
+func (i *Injector) SetupWithManager(mgr ctrl.Manager) error {
+ return ctrl.NewControllerManagedBy(mgr).
+ For(configMap,
+ builder.WithPredicates(
+ hasLabel(BundleInjectLabelKey),
+ )).
+ Complete(i)
+}
+
+func (i *Injector) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
+ data := map[string]string{"ca.crt": "bundle data"}
+ dataHash := fmt.Sprintf("%x", sha256.Sum256([]byte("bundle data hash")))
+
+ applyConfig := v1.ConfigMap(request.Name, request.Namespace).
+ WithAnnotations(map[string]string{v1alpha1.BundleHashAnnotationKey: dataHash}).
+ WithData(data)
+
+ return reconcile.Result{}, patchConfigMap(ctx, i.Client, applyConfig)
+}
+
+type Cleaner struct {
+ client.Client
+ Scheme *runtime.Scheme
+}
+
+func (c *Cleaner) SetupWithManager(mgr ctrl.Manager) error {
+ return ctrl.NewControllerManagedBy(mgr).
+ For(configMap,
+ builder.WithPredicates(
+ hasAnnotation(v1alpha1.BundleHashAnnotationKey),
+ predicate.Not(hasLabel(BundleInjectLabelKey)),
+ )).
+ Complete(c)
+}
+
+func (c *Cleaner) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
+ applyConfig := v1.ConfigMap(request.Name, request.Namespace)
+
+ return reconcile.Result{}, patchConfigMap(ctx, c.Client, applyConfig)
+}
+
+func patchConfigMap(ctx context.Context, c client.Client, applyConfig *v1.ConfigMapApplyConfiguration) error {
+ configMap, patch, err := ssa_client.GenerateConfigMapPatch(applyConfig)
+ if err != nil {
+ return err
+ }
+
+ return c.Patch(ctx, configMap, patch, client.FieldOwner(fieldManager), client.ForceOwnership)
+}
+
+func hasLabel(key string) predicate.Predicate {
+ return predicate.NewPredicateFuncs(func(obj client.Object) bool {
+ _, ok := obj.GetLabels()[key]
+ return ok
+ })
+}
+
+func hasAnnotation(key string) predicate.Predicate {
+ return predicate.NewPredicateFuncs(func(obj client.Object) bool {
+ _, ok := obj.GetAnnotations()[key]
+ return ok
+ })
+}

test/integration/bundle/inject/controller_test.go

@@ -0,0 +1,75 @@
+/*
+Copyright 2021 The cert-manager Authors.
+
+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 inject
+
+import (
+ "context"
+
+ corev1 "k8s.io/api/core/v1"
+ "sigs.k8s.io/controller-runtime/pkg/envtest/komega"
+
+ "github.com/cert-manager/trust-manager/pkg/bundle/inject"
+
+ . "github.com/onsi/ginkgo/v2"
+ . "github.com/onsi/gomega"
+)
+
+var _ = Describe("Injector", func() {
+ var namespace string
+
+ BeforeEach(func() {
+ ctx = context.Background()
+
+ ns := &corev1.Namespace{}
+ ns.GenerateName = "inject-"
+ Expect(k8sClient.Create(ctx, ns)).To(Succeed())
+ namespace = ns.Name
+ })
+
+ It("should inject bundle data when ConfigMap labeled", func() {
+ cm := &corev1.ConfigMap{}
+ cm.GenerateName = "cm-"
+ cm.Namespace = namespace
+ cm.Labels = map[string]string{
+ inject.BundleInjectLabelKey: "foo-bundle",
+ "app": "my-app",
+ }
+ cm.Data = map[string]string{
+ "tls.crt": "bar",
+ "tls.key": "baz",
+ }
+ Expect(k8sClient.Create(ctx, cm)).To(Succeed())
+
+ // Wait for ConfigMap to be processed by controller
+ Eventually(komega.Object(cm)).Should(HaveField("Data", HaveKeyWithValue("ca.crt", "bundle data")))
+ Expect(cm.Labels).To(HaveKeyWithValue("app", "my-app"))
+
+ By("removing label from ConfigMap, it should remove bundle data", func() {
+ Expect(komega.Update(cm, func() {
+ delete(cm.Labels, inject.BundleInjectLabelKey)
+ })()).To(Succeed())
+
+ // Wait for ConfigMap to be processed by controller
+ Eventually(komega.Object(cm)).Should(HaveField("Data", Not(HaveKey("ca.crt"))))
+ Expect(cm.Labels).To(HaveKeyWithValue("app", "my-app"))
+ Expect(cm.Data).To(Equal(map[string]string{
+ "tls.crt": "bar",
+ "tls.key": "baz",
+ }))
+ })
+ })
+})

test/integration/bundle/inject/suite_test.go

@@ -0,0 +1,109 @@
+/*
+Copyright 2021 The cert-manager Authors.
+
+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 inject
+
+import (
+ "context"
+ "testing"
+
+ "k8s.io/client-go/kubernetes/scheme"
+ "k8s.io/client-go/rest"
+ ctrl "sigs.k8s.io/controller-runtime"
+ "sigs.k8s.io/controller-runtime/pkg/client"
+ "sigs.k8s.io/controller-runtime/pkg/envtest"
+ "sigs.k8s.io/controller-runtime/pkg/envtest/komega"
+ logf "sigs.k8s.io/controller-runtime/pkg/log"
+ "sigs.k8s.io/controller-runtime/pkg/log/zap"
+ "sigs.k8s.io/controller-runtime/pkg/metrics/server"
+
+ "github.com/cert-manager/trust-manager/pkg/bundle/inject"
+
+ . "github.com/onsi/ginkgo/v2"
+ . "github.com/onsi/gomega"
+)
+
+var (
+ cfg *rest.Config
+ k8sClient client.Client
+ testEnv *envtest.Environment
+ ctx context.Context
+ cancel context.CancelFunc
+)
+
+func TestAPIs(t *testing.T) {
+ RegisterFailHandler(Fail)
+
+ RunSpecs(t, "Controller Suite")
+}
+
+var _ = BeforeSuite(func() {
+ logf.SetLogger(zap.New(zap.WriteTo(GinkgoWriter), zap.UseDevMode(true)))
+
+ ctx, cancel = context.WithCancel(context.TODO())
+
+ By("bootstrapping test environment")
+ testEnv = &envtest.Environment{}
+
+ var err error
+ // cfg is defined in this file globally.
+ cfg, err = testEnv.Start()
+ Expect(err).NotTo(HaveOccurred())
+ Expect(cfg).NotTo(BeNil())
+
+ k8sClient, err = client.New(cfg, client.Options{Scheme: scheme.Scheme})
+ Expect(err).NotTo(HaveOccurred())
+ Expect(k8sClient).NotTo(BeNil())
+ komega.SetClient(k8sClient)
+
+ k8sManager, err := ctrl.NewManager(cfg, ctrl.Options{
+ Client: client.Options{Cache: &client.CacheOptions{Unstructured: true}},
+ Scheme: scheme.Scheme,
+ Metrics: server.Options{
+ // Disable metrics server to avoid port conflict
+ BindAddress: "0",
+ },
+ })
+ Expect(err).NotTo(HaveOccurred())
+
+ k8sScheme := k8sManager.GetScheme()
+
+ injector := &inject.Injector{
+ Client: k8sManager.GetClient(),
+ Scheme: k8sScheme,
+ }
+ Expect(injector.SetupWithManager(k8sManager)).To(Succeed())
+ cleaner := &inject.Cleaner{
+ Client: k8sManager.GetClient(),
+ Scheme: k8sScheme,
+ }
+ Expect(cleaner.SetupWithManager(k8sManager)).To(Succeed())
+
+ go func() {
+ defer GinkgoRecover()
+ var ctrlCtx context.Context
+ ctrlCtx, cancel = context.WithCancel(ctrl.SetupSignalHandler())
+ Expect(k8sManager.Start(ctrlCtx)).To(Succeed())
+ }()
+})
+
+var _ = AfterSuite(func() {
+ cancel()
+
+ By("tearing down the test environment")
+ err := testEnv.Stop()
+ Expect(err).NotTo(HaveOccurred())
+})