Added validation webhook,cert-manager,and updated Makefile.

- Scaffolded a new validation webhook using operator-sdk
- Added manifests for webhook.
- Added manifests for self signed issuer and certificates
- Added a new spec named ValidateSecurityWarnings to the Jenkins custom resource definition to enable/disable security check.
- Updated Makefile to deploy the operator locally.
- Updated helm template and default values.yaml

Makefile

@@ -517,3 +517,24 @@ kubebuilder:
 	mkdir -p ${ENVTEST_ASSETS_DIR}
 	test -f ${ENVTEST_ASSETS_DIR}/setup-envtest.sh || curl -sSLo ${ENVTEST_ASSETS_DIR}/setup-envtest.sh https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/v0.7.0/hack/setup-envtest.sh
 	source ${ENVTEST_ASSETS_DIR}/setup-envtest.sh; fetch_envtest_tools $(ENVTEST_ASSETS_DIR); setup_envtest_env $(ENVTEST_ASSETS_DIR);
+
+#TODO Integrate with master Makefile.
+MANIFESTS := webhook/all_in_one_$(API_VERSION).yaml
+all-in-one-build-webhook: ## Re-generate all-in-one yaml
+	@echo "+ $@"
+	> $(MANIFESTS)
+	cat webhook/rbac.yaml >> $(MANIFESTS)
+	cat webhook/operator.yaml >> $(MANIFESTS)
+	cat webhook/cert-manager.yaml >> $(MANIFESTS)
+	cat webhook/webhook.yaml >> $(MANIFESTS)
+	sed -i "s~{DOCKER_REGISTRY}:{GITCOMMIT}~${DOCKER_REGISTRY}:${GITCOMMIT}~;" ${MANIFESTS} 
+	
+# start the cluster locally and set it to use the docker daemon from minikube
+install-cert-manager: minikube-start
+	kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.4.0/cert-manager.yaml 
+
+	
+#Launch cert-manager and deploy the operator locally along with webhook
+deploy-webhook: install-cert-manager install-crds container-runtime-build all-in-one-build-webhook 
+	@echo "+ $@"
+	kubectl apply -f ${MANIFESTS}

PROJECT

@@ -7,6 +7,7 @@ resources:
   group: jenkins.io
   kind: Jenkins
   version: v1alpha2
+  webhookVersion: v1
 version: 3-alpha
 plugins:
   manifests.sdk.operatorframework.io/v2: {}

api/v1alpha2/jenkins_types.go

@@ -18,6 +18,10 @@ type JenkinsSpec struct {
 	// +optional
 	SeedJobs []SeedJob `json:"seedJobs,omitempty"`
 
+	// ValidateSecurityWarnings enables or disables validating potential security warnings in Jenkins plugins via admission webhooks.
+	//+optional
+	ValidateSecurityWarnings bool `json:"ValidateSecurityWarnings,omitempty"`
+
 	// Notifications defines list of a services which are used to inform about Jenkins status
 	// Can be used to integrate chat services like Slack, Microsoft Teams or Mailgun
 	// +optional

api/v1alpha2/jenkins_webhook.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2021.
+
+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 v1alpha2
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+	ctrl "sigs.k8s.io/controller-runtime"
+	logf "sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
+)
+
+// log is for logging in this package.
+var jenkinslog = logf.Log.WithName("jenkins-resource")
+
+func (in *Jenkins) SetupWebhookWithManager(mgr ctrl.Manager) error {
+	return ctrl.NewWebhookManagedBy(mgr).
+		For(in).
+		Complete()
+}
+
+// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
+
+// TODO(user): change verbs to "verbs=create;update;delete" if you want to enable deletion validation.
+// +kubebuilder:webhook:path=/validate-jenkins-io-jenkins-io-v1alpha2-jenkins,mutating=false,failurePolicy=fail,sideEffects=None,groups=jenkins.io.jenkins.io,resources=jenkins,verbs=create;update,versions=v1alpha2,name=vjenkins.kb.io,admissionReviewVersions={v1,v1beta1}
+
+var _ webhook.Validator = &Jenkins{}
+
+// ValidateCreate implements webhook.Validator so a webhook will be registered for the type
+func (in *Jenkins) ValidateCreate() error {
+	jenkinslog.Info("validate create", "name", in.Name)
+
+	// TODO(user): fill in your validation logic upon object creation.
+	return nil
+}
+
+// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type
+func (in *Jenkins) ValidateUpdate(old runtime.Object) error {
+	jenkinslog.Info("validate update", "name", in.Name)
+
+	// TODO(user): fill in your validation logic upon object update.
+	return nil
+}
+
+func (in *Jenkins) ValidateDelete() error {
+	// TODO(user): fill in your validation logic upon object deletion.
+	return nil
+}

chart/jenkins-operator/templates/jenkins.yaml

@@ -146,6 +146,7 @@ spec:
     {{- toYaml . | nindent 6 }}
     {{- end }}
   {{- with .Values.jenkins.seedJobs }}
+  ValidateSecurityWarnings: {{ .Values.jenkins.ValidateSecurityWarnings }}
   seedJobs: {{- toYaml . | nindent 4 }}
   {{- end }}
 {{- end }}

chart/jenkins-operator/values.yaml

@@ -47,6 +47,10 @@ jenkins:
   # See https://github.com/jenkinsci/kubernetes-operator/pull/193 for more info
   disableCSRFProtection: false
 
+
+  # ValidateSecurityWarnings enables or disables validating potential security warnings in Jenkins plugins via admission webhooks.
+  ValidateSecurityWarnings: false
+  
   # imagePullSecrets is used if you want to pull images from private repository
   # See https://jenkinsci.github.io/kubernetes-operator/docs/getting-started/latest/configuration/#pulling-docker-images-from-private-repositories for more info
   imagePullSecrets: []

config/crd/bases/jenkins.io_jenkins.yaml

@@ -35,6 +35,10 @@ spec:
           spec:
             description: Spec defines the desired state of the Jenkins
             properties:
+              ValidateSecurityWarnings:
+                description: ValidateSecurityWarnings enables or disables validating
+                  potential security warnings in Jenkins plugins via admission webhooks.
+                type: boolean
               backup:
                 description: 'Backup defines configuration of Jenkins backup More
                   info: https://jenkinsci.github.io/kubernetes-operator/docs/getting-started/latest/configure-backup-and-restore/'

config/webhook/manifests.yaml

@@ -0,0 +1,29 @@
+
+---
+apiVersion: admissionregistration.k8s.io/v1
+kind: ValidatingWebhookConfiguration
+metadata:
+  creationTimestamp: null
+  name: validating-webhook-configuration
+webhooks:
+- admissionReviewVersions:
+  - v1
+  - v1beta1
+  clientConfig:
+    service:
+      name: webhook-service
+      namespace: system
+      path: /validate-jenkins-io-jenkins-io-v1alpha2-jenkins
+  failurePolicy: Fail
+  name: vjenkins.kb.io
+  rules:
+  - apiGroups:
+    - jenkins.io.jenkins.io
+    apiVersions:
+    - v1alpha2
+    operations:
+    - CREATE
+    - UPDATE
+    resources:
+    - jenkins
+  sideEffects: None

config/webhook/service.yaml

@@ -0,0 +1,12 @@
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: webhook-service
+  namespace: system
+spec:
+  ports:
+    - port: 443
+      targetPort: 9443
+  selector:
+    control-plane: controller-manager

main.go

@@ -169,6 +169,9 @@ func main() {
 		fatal(errors.Wrap(err, "unable to create Jenkins controller"), *debug)
 	}
 
+	if err = (&v1alpha2.Jenkins{}).SetupWebhookWithManager(mgr); err != nil {
+		fatal(errors.Wrap(err, "unable to create Webhook"), *debug)
+	}
 	// +kubebuilder:scaffold:builder
 
 	if err := mgr.AddHealthzCheck("health", healthz.Ping); err != nil {

webhook/all_in_one_v1alpha2.yaml

@@ -0,0 +1,357 @@
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: jenkins-operator
+---
+# permissions to do leader election.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: leader-election-role
+rules:
+- apiGroups:
+  - ""
+  - coordination.k8s.io
+  resources:
+  - configmaps
+  - leases
+  verbs:
+  - get
+  - list
+  - watch
+  - create
+  - update
+  - patch
+  - delete
+- apiGroups:
+  - ""
+  resources:
+  - events
+  verbs:
+  - create
+  - patch
+---
+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: jenkins-operator
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: jenkins-operator
+rules:
+- apiGroups:
+  - apps
+  resources:
+  - daemonsets
+  - deployments
+  - replicasets
+  - statefulsets
+  verbs:
+  - '*'
+- apiGroups:
+  - apps
+  - jenkins-operator
+  resources:
+  - deployments/finalizers
+  verbs:
+  - update
+- apiGroups:
+  - build.openshift.io
+  resources:
+  - buildconfigs
+  - builds
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - configmaps
+  - secrets
+  - services
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - events
+  verbs:
+  - create
+  - get
+  - list
+  - patch
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - persistentvolumeclaims
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - pods
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - pods
+  - pods/exec
+  verbs:
+  - '*'
+- apiGroups:
+  - ""
+  resources:
+  - pods/log
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - pods/portforward
+  verbs:
+  - create
+- apiGroups:
+  - ""
+  resources:
+  - serviceaccounts
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+- apiGroups:
+  - image.openshift.io
+  resources:
+  - imagestreams
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - jenkins.io
+  resources:
+  - '*'
+  verbs:
+  - '*'
+- apiGroups:
+  - jenkins.io
+  resources:
+  - jenkins
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
+- apiGroups:
+  - jenkins.io
+  resources:
+  - jenkins/finalizers
+  verbs:
+  - update
+- apiGroups:
+  - jenkins.io
+  resources:
+  - jenkins/status
+  verbs:
+  - get
+  - patch
+  - update
+- apiGroups:
+  - rbac.authorization.k8s.io
+  resources:
+  - rolebindings
+  - roles
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+- apiGroups:
+  - route.openshift.io
+  resources:
+  - routes
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: manager-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: jenkins-operator
+subjects:
+- kind: ServiceAccount
+  name: jenkins-operator
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: jenkins-operator
+  labels:
+    control-plane: controller-manager
+spec:
+  selector:
+    matchLabels:
+      control-plane: controller-manager
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        control-plane: controller-manager
+    spec:
+      serviceAccountName: jenkins-operator
+      securityContext:
+        runAsUser: 65532
+      containers:
+      - command:
+        - /manager
+        args:
+        - --leader-elect
+        image: jenkins-operator:6f33fe82-dirty
+        name: jenkins-operator
+        imagePullPolicy: IfNotPresent
+        securityContext:
+          allowPrivilegeEscalation: false
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: 8081
+          initialDelaySeconds: 15
+          periodSeconds: 20
+        readinessProbe:
+          httpGet:
+            path: /readyz
+            port: 8081
+          initialDelaySeconds: 5
+          periodSeconds: 10
+        resources:
+          limits:
+            cpu: 100m
+            memory: 30Mi
+          requests:
+            cpu: 100m
+            memory: 20Mi
+        env:
+          - name: WATCH_NAMESPACE
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace
+        volumeMounts:
+          - mountPath: /tmp/k8s-webhook-server/serving-certs
+            name: cert
+            readOnly: true
+      volumes:
+      - name: cert
+        secret:
+          defaultMode: 420
+          secretName: webhook-server-cert  
+      terminationGracePeriodSeconds: 10
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: webhook-certificate
+  namespace: default
+spec:
+  duration: 2160h 
+  renewBefore: 360h
+  secretName: webhook-server-cert
+  dnsNames:
+  - webhook-service.default.svc
+  - webhook-service.default.svc.cluster.local
+  issuerRef:
+    kind: Issuer
+    name: selfsigned
+
+---
+apiVersion: cert-manager.io/v1
+kind: Issuer
+metadata:
+  name: selfsigned
+  namespace: default
+spec:
+  selfSigned: {}
+
+---
+apiVersion: admissionregistration.k8s.io/v1
+kind: ValidatingWebhookConfiguration
+metadata:
+  creationTimestamp: null
+  name: validating-webhook-configuration
+  annotations:
+    cert-manager.io/inject-ca-from: default/webhook-certificate
+webhooks:
+- admissionReviewVersions:
+  - v1
+  - v1beta1
+  clientConfig:
+    service:
+      name: webhook-service
+      namespace: default
+      path: /validate-jenkins-io-v1alpha2-jenkins
+  failurePolicy: Fail
+  name: vjenkins.kb.io
+  rules:
+  - apiGroups:
+    - jenkins.io
+    apiVersions:
+    - v1alpha2
+    operations:
+    - CREATE
+    - UPDATE
+    resources:
+    - jenkins
+  sideEffects: None
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: webhook-service
+  namespace: default
+spec:
+  ports:
+    - port: 443
+      targetPort: 9443
+  selector:
+    control-plane: controller-manager
+---

webhook/cert-manager.yaml

@@ -0,0 +1,26 @@
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: webhook-certificate
+  namespace: default
+spec:
+  duration: 2160h 
+  renewBefore: 360h
+  secretName: webhook-server-cert
+  dnsNames:
+  - webhook-service.default.svc
+  - webhook-service.default.svc.cluster.local
+  issuerRef:
+    kind: Issuer
+    name: selfsigned
+
+---
+apiVersion: cert-manager.io/v1
+kind: Issuer
+metadata:
+  name: selfsigned
+  namespace: default
+spec:
+  selfSigned: {}
+
+---

webhook/operator.yaml

@@ -0,0 +1,64 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: jenkins-operator
+  labels:
+    control-plane: controller-manager
+spec:
+  selector:
+    matchLabels:
+      control-plane: controller-manager
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        control-plane: controller-manager
+    spec:
+      serviceAccountName: jenkins-operator
+      securityContext:
+        runAsUser: 65532
+      containers:
+      - command:
+        - /manager
+        args:
+        - --leader-elect
+        image: {DOCKER_REGISTRY}:{GITCOMMIT}
+        name: jenkins-operator
+        imagePullPolicy: IfNotPresent
+        securityContext:
+          allowPrivilegeEscalation: false
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: 8081
+          initialDelaySeconds: 15
+          periodSeconds: 20
+        readinessProbe:
+          httpGet:
+            path: /readyz
+            port: 8081
+          initialDelaySeconds: 5
+          periodSeconds: 10
+        resources:
+          limits:
+            cpu: 100m
+            memory: 30Mi
+          requests:
+            cpu: 100m
+            memory: 20Mi
+        env:
+          - name: WATCH_NAMESPACE
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace
+        volumeMounts:
+          - mountPath: /tmp/k8s-webhook-server/serving-certs
+            name: cert
+            readOnly: true
+      volumes:
+      - name: cert
+        secret:
+          defaultMode: 420
+          secretName: webhook-server-cert  
+      terminationGracePeriodSeconds: 10
+---

webhook/rbac.yaml

@@ -0,0 +1,224 @@
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: jenkins-operator
+---
+# permissions to do leader election.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: leader-election-role
+rules:
+- apiGroups:
+  - ""
+  - coordination.k8s.io
+  resources:
+  - configmaps
+  - leases
+  verbs:
+  - get
+  - list
+  - watch
+  - create
+  - update
+  - patch
+  - delete
+- apiGroups:
+  - ""
+  resources:
+  - events
+  verbs:
+  - create
+  - patch
+---
+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: jenkins-operator
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: jenkins-operator
+rules:
+- apiGroups:
+  - apps
+  resources:
+  - daemonsets
+  - deployments
+  - replicasets
+  - statefulsets
+  verbs:
+  - '*'
+- apiGroups:
+  - apps
+  - jenkins-operator
+  resources:
+  - deployments/finalizers
+  verbs:
+  - update
+- apiGroups:
+  - build.openshift.io
+  resources:
+  - buildconfigs
+  - builds
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - configmaps
+  - secrets
+  - services
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - events
+  verbs:
+  - create
+  - get
+  - list
+  - patch
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - persistentvolumeclaims
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - pods
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - pods
+  - pods/exec
+  verbs:
+  - '*'
+- apiGroups:
+  - ""
+  resources:
+  - pods/log
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - ""
+  resources:
+  - pods/portforward
+  verbs:
+  - create
+- apiGroups:
+  - ""
+  resources:
+  - serviceaccounts
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+- apiGroups:
+  - image.openshift.io
+  resources:
+  - imagestreams
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - jenkins.io
+  resources:
+  - '*'
+  verbs:
+  - '*'
+- apiGroups:
+  - jenkins.io
+  resources:
+  - jenkins
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
+- apiGroups:
+  - jenkins.io
+  resources:
+  - jenkins/finalizers
+  verbs:
+  - update
+- apiGroups:
+  - jenkins.io
+  resources:
+  - jenkins/status
+  verbs:
+  - get
+  - patch
+  - update
+- apiGroups:
+  - rbac.authorization.k8s.io
+  resources:
+  - rolebindings
+  - roles
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+- apiGroups:
+  - route.openshift.io
+  resources:
+  - routes
+  verbs:
+  - create
+  - get
+  - list
+  - update
+  - watch
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: manager-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: jenkins-operator
+subjects:
+- kind: ServiceAccount
+  name: jenkins-operator
+---

webhook/webhook.yaml

@@ -0,0 +1,43 @@
+apiVersion: admissionregistration.k8s.io/v1
+kind: ValidatingWebhookConfiguration
+metadata:
+  creationTimestamp: null
+  name: validating-webhook-configuration
+  annotations:
+    cert-manager.io/inject-ca-from: default/webhook-certificate
+webhooks:
+- admissionReviewVersions:
+  - v1
+  - v1beta1
+  clientConfig:
+    service:
+      name: webhook-service
+      namespace: default
+      path: /validate-jenkins-io-v1alpha2-jenkins
+  failurePolicy: Fail
+  name: vjenkins.kb.io
+  rules:
+  - apiGroups:
+    - jenkins.io
+    apiVersions:
+    - v1alpha2
+    operations:
+    - CREATE
+    - UPDATE
+    resources:
+    - jenkins
+  sideEffects: None
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: webhook-service
+  namespace: default
+spec:
+  ports:
+    - port: 443
+      targetPort: 9443
+  selector:
+    control-plane: controller-manager
+---