Fix certificate generation script arguments

.github/workflows/release-chart.yaml

@@ -4,9 +4,9 @@ on:
   push:
     branches:
       - main
-      - release/legacy-csr
+# TODO: add this back
-    paths:
+#    paths:
-      - 'charts/**'
+#      - 'helm/**'
 
 jobs:
   release:
@@ -14,6 +14,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v1
+        with:
+          ref: main
 
       - name: Configure Git
         run: |
@@ -46,6 +48,8 @@ jobs:
 
       - name: Run chart-releaser
         if: steps.helm_version_checker.outcome == 'success'
-        uses: helm/chart-releaser-action@v1.2.1
+        uses: helm/chart-releaser-action@master
+        with:
+          charts_dir: 'helm'
         env:
-          CR_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
+          CR_TOKEN: '${{ secrets.CR_TOKEN }}'

.github/workflows/release-docker.yaml

@@ -4,7 +4,6 @@ on:
   push:
     branches:
       - main
-      - devel
 
 jobs:
   release:
@@ -13,7 +12,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v1
         with:
-          ref: ${{ github.ref }}
+          ref: main
 
       - name: Configure Git
         run: |
@@ -21,10 +20,10 @@ jobs:
           git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
 
       - name: Build and push docker images (make image)
-        run: make docker-image
+        run: make image
         env:
-          DOCKER_USER: ${GITHUB_ACTOR}
+          DOCKER_USER: '${{ secrets.DOCKER_USER }}'
-          DOCKER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          DOCKER_TOKEN: '${{ secrets.DOCKER_TOKEN }}'
 
       - name: Logout from dockerhub (make docker-logout)
         run: make docker-logout

Makefile

@@ -1,9 +1,9 @@
 # Image URL to use all building/pushing image targets;
 # Use your own docker registry and image name for dev/test by overridding the
 # IMAGE_REPO, IMAGE_NAME and IMAGE_TAG environment variable.
-REPOSITORY_BASE ?= ghcr.io
+IMAGE_REPO ?= marshallmarshall
-IMAGE_REPO ?= $(REPOSITORY_BASE)/ysoftdevs/imagepullsecret-injector
 IMAGE_NAME ?= imagepullsecret-injector
+GENERATOR_IMAGE_NAME ?= webhook-cert-generator
 
 # Github host to use for checking the source tree;
 GIT_HOST ?= github.com/ysoftdevs
@@ -32,7 +32,7 @@ else
     $(error "This system's OS $(LOCAL_OS) isn't recognized/supported")
 endif
 
-all: fmt lint test build docker-image
+all: fmt lint test build image
 
 ifeq (,$(wildcard go.mod))
 ifneq ("$(realpath $(DEST))", "$(realpath $(PWD))")
@@ -66,10 +66,6 @@ test:
 # build section
 ############################################################
 
-vendor:
-	@echo "Vendoring..."
-	@go mod vendor
-
 build:
 	@echo "Building the $(IMAGE_NAME) binary..."
 	@CGO_ENABLED=0 go build -o build/_output/bin/$(IMAGE_NAME) ./cmd/
@@ -79,49 +75,32 @@ build-linux:
 	@GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o build/_output/linux/bin/$(IMAGE_NAME) ./cmd/
 
 ############################################################
-# Containerd image section
+# image section
 ############################################################
 
-containerd-image: containerd-build containerd-login containerd-push
+image: docker-login build-image push-image
-
-containerd-login:
-	@echo "$(DOCKER_TOKEN)" | nerdctl login -u "$(DOCKER_USER)" --password-stdin "$(REPOSITORY_BASE)"
-
-containerd-logout:
-	@docker logout
-
-containerd-build:
-	@echo "Building the docker image: $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG)..."
-	@nerdctl build -t $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG) -f build/Dockerfile .
-
-containerd-push: containerd-build-image
-	@echo "Pushing the docker image for $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG) and $(IMAGE_REPO)/$(IMAGE_NAME):latest..."
-	@nerdctl tag $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG) $(IMAGE_REPO)/$(IMAGE_NAME):latest
-	@nerdctl push $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG)
-	@nerdctl push $(IMAGE_REPO)/$(IMAGE_NAME):latest
-
-
-############################################################
-# Docker image section
-############################################################
-
-docker-image: docker-build docker-login docker-push
 
 docker-login:
-	@echo "$(DOCKER_TOKEN)" | docker login -u "$(DOCKER_USER)" --password-stdin "$(REPOSITORY_BASE)"
+	@echo ${DOCKER_TOKEN} | docker login -u ${DOCKER_USER} --password-stdin
 
 docker-logout:
 	@docker logout
 
-docker-build:
+build-image:
 	@echo "Building the docker image: $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG)..."
 	@docker build -t $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG) -f build/Dockerfile .
+	@echo "Building the docker image: $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):$(IMAGE_TAG)..."
+	@docker build -t $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):$(IMAGE_TAG) -f build/Dockerfile.cert-generator .
 
-docker-push: docker-build
+push-image: build-image
 	@echo "Pushing the docker image for $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG) and $(IMAGE_REPO)/$(IMAGE_NAME):latest..."
 	@docker tag $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG) $(IMAGE_REPO)/$(IMAGE_NAME):latest
 	@docker push $(IMAGE_REPO)/$(IMAGE_NAME):$(IMAGE_TAG)
 	@docker push $(IMAGE_REPO)/$(IMAGE_NAME):latest
+	@echo "Pushing the docker image for $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):$(IMAGE_TAG) and $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):latest..."
+	@docker tag $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):$(IMAGE_TAG) $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):latest
+	@docker push $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):$(IMAGE_TAG)
+	@docker push $(IMAGE_REPO)/$(GENERATOR_IMAGE_NAME):latest
 
 
 ############################################################
@@ -130,4 +109,4 @@ docker-push: docker-build
 clean:
 	@rm -rf build/_output
 
-.PHONY: all fmt lint check test build docker-image containerd-image clean
+.PHONY: all fmt lint check test build image clean

README.md

@@ -3,8 +3,10 @@
 The responsibility of this webhook is to patch all newly created/updated service account and make sure they all contained proper imagepullsecret configuration. 
 
 This repo produces one helm chart available via helm repository https://ysoftdevs.github.io/imagepullsecret-injector. There are also 2 docker images:
-- `ghcr.io/ysoftdevs/imagepullsecret-injector/imagepullsecret-injector` - the image containing the webhook itself
+- `marshallmarshall/imagepullsecret-injector` - the image containing the webhook itself
-- `ghcr.io/ysoftdevs/imagepullsecret-injector/webhook-cert-generator` - helper image responsible for (re)generating the certificates
+- `marshallmarshall/webhook-cert-generator` - helper image responsible for (re)generating the certificates
+
+
 
 ## Helm description
 The helm chart consists of 2 parts: the certificate generator and the webhook configuration itself.
@@ -40,7 +42,7 @@ Of note is also a fact that the chart runs a lookup to the connected cluster to
     make build-image
     helm upgrade -i imagepullsecret-injector \
         -n imagepullsecret-injector \
-        charts/imagepullsecret-injector
+        helm/imagepullsecret-injector
     ```
     Alternatively, you can use the pre-built, publicly available helm chart and docker images:
     ```bash
@@ -57,6 +59,3 @@ Of note is also a fact that the chart runs a lookup to the connected cluster to
     kubectl get sa -n yolo default -ojsonpath='{.imagePullSecrets}'
     ```
     The `get` command should display _some_ non-empty result.
-
-## Releasing locally
-To authenticate to the docker registry to push the images manually, you will need your own Github Personal Access Token. For more information follow this guide https://docs.github.com/en/packages/guides/migrating-to-github-container-registry-for-docker-images#authenticating-with-the-container-registry

VERSION

@@ -1 +1 @@
-0.0.26
+0.0.9

build/Dockerfile

@@ -1,13 +1,10 @@
-FROM golang:1.19.0 AS builder
+FROM golang:1.15 AS builder
 
 WORKDIR /go/src/github.com/ysoftdevs/imagepullsecret-injector
 COPY . .
-RUN make vendor build
+RUN make build
 
-FROM alpine:3.16.2 as base
+FROM alpine:3.13.4 as base
 COPY --from=builder /go/src/github.com/ysoftdevs/imagepullsecret-injector/build/_output/bin/imagepullsecret-injector /usr/local/bin/imagepullsecret-injector
 
-RUN addgroup -S imagepullsecret-injector-group && adduser -S imagepullsecret-injector-user -G imagepullsecret-injector-group
-USER imagepullsecret-injector-user
-
 ENTRYPOINT ["imagepullsecret-injector"]

build/Dockerfile.cert-generator

@@ -0,0 +1,6 @@
+FROM alpine:3.13.4
+
+RUN apk add bash curl openssl \
+    && curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" \
+    && chmod 755 ./kubectl \
+    && mv ./kubectl /usr/bin/kubectl

charts/imagepullsecret-injector/templates/cert.yaml

@@ -1,13 +0,0 @@
-apiVersion: cert-manager.io/v1
-kind: Certificate
-metadata:
-  name: {{ include "imagepullsecret-injector.certificateName" . }}
-spec:
-  commonName: {{ include "imagepullsecret-injector.serviceName" . }}.{{ .Release.Namespace }}.svc
-  dnsNames:
-    - {{ include "imagepullsecret-injector.serviceName" . }}.{{ .Release.Namespace }}.svc.cluster.local
-    - {{ include "imagepullsecret-injector.serviceName" . }}.{{ .Release.Namespace }}.svc
-  issuerRef:
-    kind: ClusterIssuer
-    name: {{ .Values.clusterIssuer }}
-  secretName: {{ include "imagepullsecret-injector.certificateSecretName" . | quote }}

cmd/main.go

@@ -1,27 +1,48 @@
 package main
 
 import (
+	"context"
 	"crypto/tls"
 	"flag"
 	"fmt"
 	"net/http"
 	"os"
 	"os/signal"
+	"strconv"
 	"syscall"
 
-	log "github.com/sirupsen/logrus"
+	"github.com/golang/glog"
 )
 
-func initLogger() *log.Logger {
+func LookupStringEnv(envName string, defVal string) string {
-	logger := log.New()
+	if envVal, exists := os.LookupEnv(envName); exists {
-	logger.SetFormatter(&log.JSONFormatter{})
+		return envVal
+	}
 
-	return logger
+	return defVal
+}
+
+func LookupBoolEnv(envName string, defVal bool) bool {
+	if envVal, exists := os.LookupEnv(envName); exists {
+		if boolVal, err := strconv.ParseBool(envVal); err == nil {
+			return boolVal
+		}
+	}
+
+	return defVal
+}
+
+func LookupIntEnv(envName string, defVal int) int {
+	if envVal, exists := os.LookupEnv(envName); exists {
+		if intVal, err := strconv.Atoi(envVal); err == nil {
+			return intVal
+		}
+	}
+
+	return defVal
 }
 
 func main() {
-	logger := initLogger()
-
 	parameters := DefaultParametersObject()
 
 	// get command line parameters
@@ -37,24 +58,19 @@ func main() {
 	flag.BoolVar(&parameters.ignoreSecretCreationError, "ignoreSecretCreationError", LookupBoolEnv("CONFIG_IGNORE_SECRET_CREATION_ERROR", parameters.ignoreSecretCreationError), "If true, failed creation/update of secrets in the target namespace will not cause the webhook to fail")
 	flag.Parse()
 
-	logger.Infof("Running with config: %+v", parameters)
+	glog.Infof("Running with config: %+v", parameters)
 
-	whsvr, err := NewWebhookServer(
+	whsvr := &WebhookServer{
-		&parameters,
+		config: &parameters,
-		&http.Server{
+		server: &http.Server{
 			Addr: fmt.Sprintf(":%v", parameters.port),
 			// This is quite inefficient as it loads file contents on every TLS ClientHello, but ¯\_(ツ)_/¯
 			TLSConfig: &tls.Config{GetCertificate: func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
-				logger.Infof("Loading certificates")
+				glog.Infof("Loading certificates")
 				cert, err := tls.LoadX509KeyPair(parameters.certFile, parameters.keyFile)
 				return &cert, err
 			}},
 		},
-		logger,
-	)
-	if err != nil {
-		logger.Panicf("Could not create the Webhook server: %v", err)
-		logger.Exit(1)
 	}
 
 	// define http server and server handler
@@ -62,32 +78,20 @@ func main() {
 	mux.HandleFunc("/mutate", whsvr.serve)
 	whsvr.server.Handler = mux
 
-	// define the channel for shutting down the main process
+	// start webhook server in new rountine
-	endSignal := make(chan bool, 1)
-
-	// wait for the system interrupts in a separate routine
-	go func() {
-		signalChan := make(chan os.Signal, 1)
-		signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
-		sig := <-signalChan
-
-		logger.Infof(fmt.Sprintf("Got OS signal \"%+v\", shutting down webhook server gracefully...", sig))
-
-		endSignal <- true
-	}()
-
-	// start the webhook server in a separate routine
 	go func() {
 		if err := whsvr.server.ListenAndServeTLS(parameters.certFile, parameters.keyFile); err != nil {
-			logger.Errorf("Failed to listen and serve webhook server: %v", err)
+			glog.Errorf("Failed to listen and serve webhook server: %v", err)
 		}
-
-		endSignal <- true
 	}()
 
-	<-endSignal
+	// listening OS shutdown singal
-	logger.Infof("Received the end signal, stopping the main process")
+	signalChan := make(chan os.Signal, 1)
-	if err := whsvr.Shutdown(); err != nil {
+	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
-		logger.Errorf("Error while shutting down: %v", err)
+	<-signalChan
+
+	glog.Infof("Got OS shutdown signal, shutting down webhook server gracefully...")
+	if err := whsvr.server.Shutdown(context.Background()); err != nil {
+		glog.Errorf("Error while shutting down: %v", err)
 	}
 }

cmd/utils.go

@@ -1,55 +0,0 @@
-package main
-
-import (
-	"io/ioutil"
-	"os"
-	"strconv"
-	"strings"
-)
-
-// LookupStringEnv either returns the the value of the env variable, or the provided default value, if the env doesn't exist
-func LookupStringEnv(envName string, defVal string) string {
-	if envVal, exists := os.LookupEnv(envName); exists {
-		return envVal
-	}
-
-	return defVal
-}
-
-// LookupBoolEnv either returns the the value of the env variable, or the provided default value, if the env doesn't exist
-func LookupBoolEnv(envName string, defVal bool) bool {
-	if envVal, exists := os.LookupEnv(envName); exists {
-		if boolVal, err := strconv.ParseBool(envVal); err == nil {
-			return boolVal
-		}
-	}
-
-	return defVal
-}
-
-// LookupIntEnv either returns the the value of the env variable, or the provided default value, if the env doesn't exist
-func LookupIntEnv(envName string, defVal int) int {
-	if envVal, exists := os.LookupEnv(envName); exists {
-		if intVal, err := strconv.Atoi(envVal); err == nil {
-			return intVal
-		}
-	}
-
-	return defVal
-}
-
-func getCurrentNamespace() string {
-	// Check whether we have overridden the namespace
-	if ns, ok := os.LookupEnv("POD_NAMESPACE"); ok {
-		return ns
-	}
-
-	// Fall back to the namespace associated with the service account token, if available (this should exist if running in a K8S pod)
-	if data, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace"); err == nil {
-		if ns := strings.TrimSpace(string(data)); len(ns) > 0 {
-			return ns
-		}
-	}
-
-	return "default"
-}

cmd/webhook.go

@@ -1,15 +1,15 @@
 package main
 
 import (
-	"context"
 	"encoding/json"
 	"fmt"
-	log "github.com/sirupsen/logrus"
 	"io/ioutil"
 	"k8s.io/apimachinery/pkg/api/errors"
 	"net/http"
+	"os"
 	"strings"
 
+	"github.com/golang/glog"
 	"k8s.io/api/admission/v1beta1"
 	admissionregistrationv1beta1 "k8s.io/api/admissionregistration/v1beta1"
 	"k8s.io/api/core/v1"
@@ -28,19 +28,15 @@ var (
 )
 
 type WebhookServer struct {
-	logger *log.Logger
+	server *http.Server
-
+	config *WhSvrParameters
-	server  *http.Server
-	config  *WhSvrParameters
-	client  *kubernetes.Clientset
-	context context.Context
 }
 
-// WhSvrParameters represents all configuration options available though cmd parameters or env variables
+// Webhook Server parameters
 type WhSvrParameters struct {
-	port                           int
+	port                           int    // webhook server port
-	certFile                       string
+	certFile                       string // path to the x509 certificate for https
-	keyFile                        string
+	keyFile                        string // path to the x509 private key matching `CertFile`
 	excludeNamespaces              string
 	serviceAccounts                string
 	allServiceAccounts             bool
@@ -61,31 +57,6 @@ var (
 	}
 )
 
-// NewWebhookServer constructor for WebhookServer
-func NewWebhookServer(parameters *WhSvrParameters, server *http.Server, logger *log.Logger) (*WebhookServer, error) {
-	config, err := rest.InClusterConfig()
-	if err != nil {
-		logger.Errorf("Could not create k8s client: %v", err)
-		return nil, err
-	}
-	clientset, err := kubernetes.NewForConfig(config)
-	if err != nil {
-		logger.Errorf("Could not create k8s clientset: %v", err)
-		return nil, err
-	}
-
-	return &WebhookServer{
-		logger: logger,
-
-		config:  parameters,
-		server:  server,
-		client:  clientset,
-		context: context.Background(),
-	}, nil
-
-}
-
-// DefaultParametersObject returns a parameters object with the default values
 func DefaultParametersObject() WhSvrParameters {
 	return WhSvrParameters{
 		port:                           8443,
@@ -136,62 +107,82 @@ func addImagePullSecret(target, added []corev1.LocalObjectReference, basePath st
 	return patch
 }
 
-// ensureSecrets looks up the source secret and makes sure the namespace the patched SA is in contains it too
+func getCurrentNamespace() string {
-func (whsvr *WebhookServer) ensureSecrets(ar *v1beta1.AdmissionReview) error {
+	// This way assumes you've set the POD_NAMESPACE environment variable using the downward API.
-	whsvr.logger.Infof("Ensuring existing secrets")
+	// This check has to be done first for backwards compatibility with the way InClusterConfig was originally set up
-	targetNamespace := ar.Request.Namespace
+	if ns, ok := os.LookupEnv("POD_NAMESPACE"); ok {
+		return ns
+	}
 
+	// Fall back to the namespace associated with the service account token, if available
+	if data, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace"); err == nil {
+		if ns := strings.TrimSpace(string(data)); len(ns) > 0 {
+			return ns
+		}
+	}
+
+	return "default"
+}
+
+func (whsvr *WebhookServer) ensureSecrets(ar *v1beta1.AdmissionReview) error {
+	glog.Infof("Ensuring existing secrets")
+	namespace := ar.Request.Namespace
+
+	config, err := rest.InClusterConfig()
+	if err != nil {
+		glog.Errorf("Could not create k8s client: %v", err)
+		return err
+	}
+	clientset, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		glog.Errorf("Could not create k8s clientset: %v", err)
+		return err
+	}
 	currentNamespace := getCurrentNamespace()
 
-	whsvr.logger.Infof("Looking for the source secret")
+	glog.Infof("Looking for the source secret")
-	sourceSecret, err := whsvr.client.CoreV1().Secrets(whsvr.config.sourceImagePullSecretNamespace).Get(whsvr.context, whsvr.config.sourceImagePullSecretName, metav1.GetOptions{})
+	sourceSecret, err := clientset.CoreV1().Secrets(whsvr.config.sourceImagePullSecretNamespace).Get(whsvr.config.sourceImagePullSecretName, metav1.GetOptions{})
 	if err != nil {
-		whsvr.logger.Errorf("Could not fetch source secret %s in namespace %s: %v", whsvr.config.sourceImagePullSecretName, currentNamespace, err)
+		glog.Errorf("Could not fetch source secret %s in namespace %s: %v", whsvr.config.sourceImagePullSecretName, currentNamespace, err)
 		return err
 	}
-	if sourceSecret.Type != corev1.SecretTypeDockerConfigJson {
+	glog.Infof("Source secret found")
-		err := fmt.Errorf("source secret %s in namespace %s exists, but has incorrect type (is %s, should be %s)", whsvr.config.sourceImagePullSecretName, currentNamespace, sourceSecret.Type, corev1.SecretTypeDockerConfigJson)
-		whsvr.logger.Errorf("%v", err)
-		return err
-	}
-	whsvr.logger.Infof("Source secret found")
 
-	whsvr.logger.Infof("Looking for the existing target secret")
+	glog.Infof("Looking for the existing target secret")
-	secret, err := whsvr.client.CoreV1().Secrets(targetNamespace).Get(whsvr.context, whsvr.config.targetImagePullSecretName, metav1.GetOptions{})
+	secret, err := clientset.CoreV1().Secrets(namespace).Get(whsvr.config.targetImagePullSecretName, metav1.GetOptions{})
 	if err != nil && !errors.IsNotFound(err) {
-		whsvr.logger.Errorf("Could not fetch secret %s in namespace %s: %v", whsvr.config.targetImagePullSecretName, targetNamespace, err)
+		glog.Errorf("Could not fetch secret %s in namespace %s: %v", whsvr.config.targetImagePullSecretName, namespace, err)
 		return err
 	}
 
 	if err != nil && errors.IsNotFound(err) {
-		whsvr.logger.Infof("Target secret not found, creating a new one")
+		glog.Infof("Target secret not found, creating a new one")
-		if _, createErr := whsvr.client.CoreV1().Secrets(targetNamespace).Create(whsvr.context, &corev1.Secret{
+		if _, createErr := clientset.CoreV1().Secrets(namespace).Create(&corev1.Secret{
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      whsvr.config.targetImagePullSecretName,
-				Namespace: targetNamespace,
+				Namespace: namespace,
 			},
 			Data: sourceSecret.Data,
 			Type: sourceSecret.Type,
-		}, metav1.CreateOptions{}); createErr != nil {
+		}); createErr != nil {
-			whsvr.logger.Errorf("Could not create secret %s in namespace %s: %v", whsvr.config.targetImagePullSecretName, targetNamespace, err)
+			glog.Errorf("Could not create secret %s in namespace %s: %v", whsvr.config.targetImagePullSecretName, namespace, err)
 			return err
 		}
-		whsvr.logger.Infof("Target secret created successfully")
+		glog.Infof("Target secret created successfully")
 		return nil
 	}
 
-	whsvr.logger.Infof("Target secret found, updating")
+	glog.Infof("Target secret found, updating")
 	secret.Data = sourceSecret.Data
-	if _, err := whsvr.client.CoreV1().Secrets(targetNamespace).Update(whsvr.context, secret, metav1.UpdateOptions{}); err != nil {
+	if _, err := clientset.CoreV1().Secrets(namespace).Update(secret); err != nil {
-		whsvr.logger.Errorf("Could not update secret %s in namespace %s: %v", whsvr.config.targetImagePullSecretName, targetNamespace, err)
+		glog.Errorf("Could not update secret %s in namespace %s: %v", whsvr.config.targetImagePullSecretName, namespace, err)
 		return err
 	}
-	whsvr.logger.Infof("Target secret updated successfully")
+	glog.Infof("Target secret updated successfully")
 
 	return nil
 }
 
-// shouldMutate goes through all filters and determines whether the incoming SA matches them
 func (whsvr *WebhookServer) shouldMutate(sa corev1.ServiceAccount) bool {
 	for _, excludedNamespace := range strings.Split(whsvr.config.excludeNamespaces, ",") {
 		if sa.Namespace == excludedNamespace {
@@ -212,13 +203,12 @@ func (whsvr *WebhookServer) shouldMutate(sa corev1.ServiceAccount) bool {
 	return false
 }
 
-// mutateServiceAccount contains the whole mutation logic
 func (whsvr *WebhookServer) mutateServiceAccount(ar *v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
 	req := ar.Request
-	whsvr.logger.Infof("Unmarshalling the ServiceAccount object from request")
+	glog.Infof("Unmarshalling the ServiceAccount object from request")
 	var sa corev1.ServiceAccount
 	if err := json.Unmarshal(req.Object.Raw, &sa); err != nil {
-		whsvr.logger.Errorf("Could not unmarshal raw object: %v", err)
+		glog.Errorf("Could not unmarshal raw object: %v", err)
 		return &v1beta1.AdmissionResponse{
 			Result: &metav1.Status{
 				Message: err.Error(),
@@ -226,34 +216,21 @@ func (whsvr *WebhookServer) mutateServiceAccount(ar *v1beta1.AdmissionReview) *v
 		}
 	}
 
-	whsvr.logger.Infof("AdmissionReview for Kind=%v, Namespace=%v Name=%v (%v) UID=%v patchOperation=%v UserInfo=%v",
+	glog.Infof("AdmissionReview for Kind=%v, Namespace=%v Name=%v (%v) UID=%v patchOperation=%v UserInfo=%v",
 		req.Kind, req.Namespace, req.Name, sa.Name, req.UID, req.Operation, req.UserInfo)
 
 	if !whsvr.shouldMutate(sa) {
-		whsvr.logger.Infof("Conditions for mutation not met, skipping")
+		glog.Infof("Conditions for mutation not met, skipping")
 		return &v1beta1.AdmissionResponse{
 			Allowed: true,
 		}
 	}
 
-	// Make sure the secrets are present
+	// Check whether we already have the imagePullSecretName present
-	if err := whsvr.ensureSecrets(ar); err != nil {
-		whsvr.logger.Errorf("Could not ensure existence of the imagePullSecret")
-		if !whsvr.config.ignoreSecretCreationError {
-			whsvr.logger.Errorf("Failing the mutation process")
-			return &v1beta1.AdmissionResponse{
-				Result: &metav1.Status{
-					Message: err.Error(),
-				},
-			}
-		}
-		whsvr.logger.Infof("ignoreSecretCreationError is true, ignoring")
-	}
-
 	if sa.ImagePullSecrets != nil {
+		glog.Infof("ServiceAccount is already in the correct state, skipping")
 		for _, lor := range sa.ImagePullSecrets {
 			if whsvr.config.targetImagePullSecretName == lor.Name {
-				whsvr.logger.Infof("ServiceAccount is already in the correct state, skipping the patch")
 				return &v1beta1.AdmissionResponse{
 					Allowed: true,
 				}
@@ -261,13 +238,13 @@ func (whsvr *WebhookServer) mutateServiceAccount(ar *v1beta1.AdmissionReview) *v
 		}
 	}
 
-	whsvr.logger.Infof("ServiceAccount is missing ImagePullSecrets configuration, creating a patch")
+	glog.Infof("ServiceAccount is missing ImagePullSecrets configuration, creating a patch")
 
 	var patch []patchOperation
 	patch = append(patch, addImagePullSecret(sa.ImagePullSecrets, []corev1.LocalObjectReference{{Name: whsvr.config.targetImagePullSecretName}}, "/imagePullSecrets")...)
 	patchBytes, err := json.Marshal(patch)
 	if err != nil {
-		whsvr.logger.Errorf("Could not marshal patch object: %v", err)
+		glog.Errorf("Could not marshal patch object: %v", err)
 		return &v1beta1.AdmissionResponse{
 			Result: &metav1.Status{
 				Message: err.Error(),
@@ -275,6 +252,19 @@ func (whsvr *WebhookServer) mutateServiceAccount(ar *v1beta1.AdmissionReview) *v
 		}
 	}
 
+	if err := whsvr.ensureSecrets(ar); err != nil {
+		glog.Errorf("Could not ensure existence of the imagePullSecret")
+		if !whsvr.config.ignoreSecretCreationError {
+			glog.Errorf("Failing the mutation process")
+			return &v1beta1.AdmissionResponse{
+				Result: &metav1.Status{
+					Message: err.Error(),
+				},
+			}
+		}
+		glog.Infof("ignoreSecretCreationError is true, ignoring")
+	}
+
 	return &v1beta1.AdmissionResponse{
 		Allowed: true,
 		Patch:   patchBytes,
@@ -285,8 +275,8 @@ func (whsvr *WebhookServer) mutateServiceAccount(ar *v1beta1.AdmissionReview) *v
 	}
 }
 
-func (whsvr *WebhookServer) parseIncomingRequest(r *http.Request) (v1beta1.AdmissionReview, *errors.StatusError) {
+// Serve method for webhook server
-	var ar v1beta1.AdmissionReview
+func (whsvr *WebhookServer) serve(w http.ResponseWriter, r *http.Request) {
 	var body []byte
 	if r.Body != nil {
 		if data, err := ioutil.ReadAll(r.Body); err == nil {
@@ -294,73 +284,50 @@ func (whsvr *WebhookServer) parseIncomingRequest(r *http.Request) (v1beta1.Admis
 		}
 	}
 	if len(body) == 0 {
-		whsvr.logger.Error("Empty body")
+		glog.Error("empty body")
-		return ar, errors.NewBadRequest("Empty body")
+		http.Error(w, "empty body", http.StatusBadRequest)
+		return
 	}
 
 	// verify the content type is accurate
 	contentType := r.Header.Get("Content-Type")
 	if contentType != "application/json" {
-		whsvr.logger.Errorf("Content-Type=%s, expect application/json", contentType)
+		glog.Errorf("Content-Type=%s, expect application/json", contentType)
-		err := &errors.StatusError{ErrStatus: metav1.Status{
+		http.Error(w, "invalid Content-Type, expect `application/json`", http.StatusUnsupportedMediaType)
-			Status:  metav1.StatusFailure,
-			Message: fmt.Sprintf("Content-Type=%s, expect application/json", contentType),
-			Reason:  metav1.StatusReasonUnsupportedMediaType,
-			Code:    http.StatusUnsupportedMediaType,
-		}}
-		return ar, err
-	}
-
-	if _, _, err := deserializer.Decode(body, nil, &ar); err != nil {
-		whsvr.logger.Error("Could not parse the request body")
-		return ar, errors.NewBadRequest(fmt.Sprintf("Could not parse the request body: %+v", err))
-	}
-
-	return ar, nil
-}
-
-func (whsvr *WebhookServer) sendResponse(w http.ResponseWriter, admissionReview v1beta1.AdmissionReview) error {
-	resp, err := json.Marshal(admissionReview)
-	if err != nil {
-		whsvr.logger.Errorf("Can't encode response: %v", err)
-		http.Error(w, fmt.Sprintf("could not encode response: %v", err), http.StatusInternalServerError)
-		return err
-	}
-	whsvr.logger.Infof("Writing response")
-	if _, err := w.Write(resp); err != nil {
-		whsvr.logger.Errorf("Can't write response: %v", err)
-		http.Error(w, fmt.Sprintf("could not write response: %v", err), http.StatusInternalServerError)
-		return err
-	}
-
-	return nil
-}
-
-// serve parses the raw incoming request, calls the mutation logic and sends the proper response
-func (whsvr *WebhookServer) serve(w http.ResponseWriter, r *http.Request) {
-	admissionReviewIn, statusErr := whsvr.parseIncomingRequest(r)
-	if statusErr != nil {
-		http.Error(w, statusErr.ErrStatus.Message, int(statusErr.ErrStatus.Code))
 		return
 	}
 
-	admissionResponse := whsvr.mutateServiceAccount(&admissionReviewIn)
+	var admissionResponse *v1beta1.AdmissionResponse
+	ar := v1beta1.AdmissionReview{}
+	if _, _, err := deserializer.Decode(body, nil, &ar); err != nil {
+		glog.Errorf("Can't decode body: %v", err)
+		admissionResponse = &v1beta1.AdmissionResponse{
+			Result: &metav1.Status{
+				Message: err.Error(),
+			},
+		}
+	} else {
+		admissionResponse = whsvr.mutateServiceAccount(&ar)
+	}
 
-	admissionReviewOut := v1beta1.AdmissionReview{
+	admissionReview := v1beta1.AdmissionReview{
 		TypeMeta: metav1.TypeMeta{Kind: "AdmissionReview", APIVersion: "admission.k8s.io/v1"},
 	}
 	if admissionResponse != nil {
-		admissionReviewOut.Response = admissionResponse
+		admissionReview.Response = admissionResponse
-		if admissionReviewIn.Request != nil {
+		if ar.Request != nil {
-			admissionReviewOut.Response.UID = admissionReviewIn.Request.UID
+			admissionReview.Response.UID = ar.Request.UID
 		}
 	}
 
-	if err := whsvr.sendResponse(w, admissionReviewOut); err != nil {
+	resp, err := json.Marshal(admissionReview)
-		whsvr.logger.Errorf("Could not send response %v", err)
+	if err != nil {
+		glog.Errorf("Can't encode response: %v", err)
+		http.Error(w, fmt.Sprintf("could not encode response: %v", err), http.StatusInternalServerError)
+	}
+	glog.Infof("Ready to write reponse ...")
+	if _, err := w.Write(resp); err != nil {
+		glog.Errorf("Can't write response: %v", err)
+		http.Error(w, fmt.Sprintf("could not write response: %v", err), http.StatusInternalServerError)
 	}
 }
-
-func (whsvr *WebhookServer) Shutdown() error {
-	return whsvr.server.Shutdown(context.Background())
-}

go.mod

@@ -1,48 +1,11 @@
 module github.com/ysoftdevs/imagepullsecret-injector
 
 require (
-	github.com/sirupsen/logrus v1.9.0
+	github.com/ghodss/yaml v0.0.0-20150909031657-73d445a93680
-	k8s.io/api v0.24.1
+	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	k8s.io/apimachinery v0.24.1
+	k8s.io/api v0.17.0
-	k8s.io/client-go v0.24.1
+	k8s.io/apimachinery v0.17.0
+	k8s.io/client-go v0.17.0
 )
 
-require (
+go 1.15
-	github.com/PuerkitoBio/purell v1.1.1 // indirect
-	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/emicklei/go-restful v2.9.5+incompatible // indirect
-	github.com/go-logr/logr v1.2.0 // indirect
-	github.com/go-openapi/jsonpointer v0.19.5 // indirect
-	github.com/go-openapi/jsonreference v0.19.5 // indirect
-	github.com/go-openapi/swag v0.19.14 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/gnostic v0.5.7-v3refs // indirect
-	github.com/google/gofuzz v1.1.0 // indirect
-	github.com/josharian/intern v1.0.0 // indirect
-	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/mailru/easyjson v0.7.6 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
-	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
-	golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect
-	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
-	golang.org/x/text v0.3.7 // indirect
-	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
-	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
-	gopkg.in/inf.v0 v0.9.1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
-	k8s.io/klog/v2 v2.60.1 // indirect
-	k8s.io/kube-openapi v0.0.0-20220328201542-3ee0da9b0b42 // indirect
-	k8s.io/utils v0.0.0-20220210201930-3a6ce19ff2f9 // indirect
-	sigs.k8s.io/json v0.0.0-20211208200746-9f7c6b3444d2 // indirect
-	sigs.k8s.io/structured-merge-diff/v4 v4.2.1 // indirect
-	sigs.k8s.io/yaml v1.2.0 // indirect
-)
-
-go 1.19

go.sum

@@ -9,113 +9,166 @@ cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6T
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
 cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
 cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
-cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
-cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
-cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg=
-cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8=
-cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
-cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
-cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
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 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
 cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
 cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
-cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
-cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
-github.com/Azure/go-autorest/autorest v0.11.18/go.mod h1:dSiJPy22c3u0OtOKDNttNgqpNFY/GeWa7GH/Pz56QRA=
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-github.com/Azure/go-autorest/autorest/adal v0.9.13/go.mod h1:W/MM4U6nLxnIskrw4UwWzlHfGjwUS50aOsc/I3yuU8M=
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 github.com/Azure/go-autorest/autorest/mocks v0.4.1/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
-github.com/Azure/go-autorest/logger v0.2.1/go.mod h1:T9E3cAhj2VqvPOtCYAvby9aBXkZmbF5NWuPV8+WeEW8=
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 github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBpUA79WCAKPPZVC2DeU=
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 github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
-github.com/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
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+github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
+github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 h1:d+Bc7a5rLufV/sSk/8dngufqelfh6jnri85riMAaF/M=
 github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
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@@ -283,7 +437,6 @@ golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHl
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@@ -292,12 +445,16 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
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@@ -316,65 +476,47 @@ golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -489,26 +597,13 @@ google.golang.org/api v0.14.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsb
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helm/imagepullsecret-injector/Chart.yaml

@@ -15,9 +15,9 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.0.29
+version: 0.0.10
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
-appVersion: 0.0.26
+appVersion: 0.0.9

helm/imagepullsecret-injector/scripts/create-signed-cert.sh

@@ -0,0 +1,137 @@
+#!/bin/bash
+
+set -e
+
+usage() {
+    cat <<EOF
+Generate certificate suitable for use with an imagepullsecret-injector webhook service.
+
+This script uses k8s' CertificateSigningRequest API to a generate a
+certificate signed by k8s CA suitable for use with imagepullsecret-injector webhook
+services. This requires permissions to create and approve CSR. See
+https://kubernetes.io/docs/tasks/tls/managing-tls-in-a-cluster for
+detailed explanation and additional instructions.
+
+The server key/cert k8s CA cert are stored in a k8s secret.
+
+usage: ${0} [OPTIONS]
+
+The following flags are required.
+
+       --service          Service name of webhook.
+       --namespace        Namespace where webhook service and secret reside.
+       --secret           Secret name for CA certificate and server certificate/key pair.
+EOF
+    exit 1
+}
+
+while [[ $# -gt 0 ]]; do
+    case ${1} in
+        --service)
+            service="$2"
+            shift
+            ;;
+        --secret)
+            secret="$2"
+            shift
+            ;;
+        --namespace)
+            namespace="$2"
+            shift
+            ;;
+        *)
+            usage
+            ;;
+    esac
+    shift
+done
+
+[ -z "${service}" ] && service=ips-injector-svc
+[ -z "${secret}" ] && secret=imagepullsecret-injector-webhook-certs
+[ -z "${namespace}" ] && namespace=imagepullsecret-injector
+
+if [ ! -x "$(command -v openssl)" ]; then
+    echo "openssl not found"
+    exit 1
+fi
+
+csrName=${service}.${namespace}
+tmpdir=$(mktemp -d)
+echo "Creating certs in tmpdir ${tmpdir}"
+
+cat <<EOF >> "${tmpdir}"/csr.conf
+[req]
+req_extensions = v3_req
+distinguished_name = req_distinguished_name
+[req_distinguished_name]
+[ v3_req ]
+basicConstraints = CA:FALSE
+keyUsage = nonRepudiation, digitalSignature, keyEncipherment
+extendedKeyUsage = serverAuth
+subjectAltName = @alt_names
+[alt_names]
+DNS.1 = ${service}
+DNS.2 = ${service}.${namespace}
+DNS.3 = ${service}.${namespace}.svc
+EOF
+
+openssl genrsa -out "${tmpdir}"/server-key.pem 2048
+openssl req -new -key "${tmpdir}"/server-key.pem -subj "/O=system:nodes/CN=system:node:${service}.${namespace}.svc" -out "${tmpdir}"/server.csr -config "${tmpdir}"/csr.conf
+
+# clean-up any previously created CSR for our service. Ignore errors if not present.
+echo "Deleting old CertificateSigningRequests"
+kubectl delete csr ${csrName} 2>/dev/null || true
+
+echo "Creating new CertificateSigningRequests"
+# create  server cert/key CSR and  send to k8s API
+cat <<EOF | kubectl create -f -
+apiVersion: certificates.k8s.io/v1
+kind: CertificateSigningRequest
+metadata:
+  name: ${csrName}
+spec:
+  signerName: kubernetes.io/kubelet-serving
+  groups:
+  - system:authenticated
+  request: $(< "${tmpdir}"/server.csr base64 | tr -d '\n')
+  usages:
+  - digital signature
+  - key encipherment
+  - server auth
+EOF
+
+# verify CSR has been created
+while true; do
+    if kubectl get csr ${csrName}; then
+        break
+    else
+        sleep 1
+    fi
+done
+
+echo "Approving CertificateSigningRequests"
+# approve and fetch the signed certificate
+kubectl certificate approve ${csrName}
+
+echo "Fetching certificate from approved CertificateSigningRequests"
+# verify certificate has been signed
+for _ in $(seq 10); do
+    serverCert=$(kubectl get csr ${csrName} -o jsonpath='{.status.certificate}')
+    if [[ ${serverCert} != '' ]]; then
+        break
+    fi
+    sleep 1
+done
+if [[ ${serverCert} == '' ]]; then
+    echo "ERROR: After approving csr ${csrName}, the signed certificate did not appear on the resource. Giving up after 10 attempts." >&2
+    exit 1
+fi
+echo "${serverCert}" | openssl base64 -d -A -out "${tmpdir}"/server-cert.pem
+
+echo "Creating secret $secret based on the retrieved certificate"
+# create the secret with CA cert and server cert/key
+kubectl create secret generic ${secret} \
+        --from-file=key.pem="${tmpdir}"/server-key.pem \
+        --from-file=cert.pem="${tmpdir}"/server-cert.pem \
+        --dry-run=client -o yaml |
+    kubectl -n ${namespace} apply -f -

helm/imagepullsecret-injector/templates/_helpers.tpl

@@ -10,14 +10,20 @@ Expand the name of the chart.
 ips-injector-svc
 {{- end }}
 
-{{- define "imagepullsecret-injector.certificateName" -}}
-{{ include "imagepullsecret-injector.name" . }}-webhook-cert
-{{- end }}
-
 {{- define "imagepullsecret-injector.certificateSecretName" -}}
 {{ include "imagepullsecret-injector.name" . }}-webhook-certs
 {{- end }}
 
+{{- define "imagepullsecret-injector.lookupCaBundle" -}}
+{{- /* Find the name of the secret corresponding to the default SA in the default namespace */ -}}
+{{- /* Equivalent to `kubectl get sa -n default default -ojsonpath='{.secrets[0].name}'` */ -}}
+{{- $defaultSecretName := ((lookup "v1" "ServiceAccount" "default" "default").secrets | first).name -}}
+{{- /* Fetch the ca.crt from the default secret (still base64-encoded)*/ -}}
+{{- /* Equivalent to `kubectl get secret -n default $defaultSecretName -ojsonpath='{.data.ca\.crt}'` */ -}}
+{{- $caBundle := get (lookup "v1" "Secret" "default" $defaultSecretName ).data "ca.crt" -}}
+{{- $caBundle -}}
+{{- end }}
+
 {{/*
 Create a default fully qualified app name.
 We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).

helm/imagepullsecret-injector/templates/certificate-gen/configmap-certigicate-gen.yaml

@@ -0,0 +1,9 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: imagepullsecret-injector-cert-gen-entrypoint
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "imagepullsecret-injector.labels" . | nindent 4 }}
+data:
+  entrypoint.sh: | {{ .Files.Get "scripts/create-signed-cert.sh" | nindent 4 }}

helm/imagepullsecret-injector/templates/certificate-gen/cronjob-certificate-gen.yaml

@@ -0,0 +1,37 @@
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+  name: "{{ .Release.Name }}"
+  labels:
+    {{- include "imagepullsecret-injector.labels" . | nindent 4 }}
+spec:
+  schedule: '* * * * *'
+  jobTemplate:
+    metadata:
+      name: "{{ .Release.Name }}"
+      labels:
+        {{- include "imagepullsecret-injector.labels" . | nindent 8 }}
+    spec:
+      template:
+        spec:
+          serviceAccountName: imagepullsecret-injector-cert-gen
+          restartPolicy: Never
+          containers:
+            - name: pre-install-job
+              image: "{{ .Values.certificateGeneratorImage.registry }}/{{ .Values.certificateGeneratorImage.repository }}:{{ .Values.certificateGeneratorImage.tag | default .Chart.AppVersion }}"
+              command: ["/entrypoint/entrypoint.sh"]
+              args:
+                - --service "{{ include "imagepullsecret-injector.serviceName" . }}"
+                - --namespace "{{ .Release.Namespace }}"
+                - --secret "{{ include "imagepullsecret-injector.certificateSecretName" . }}"
+              volumeMounts:
+                - mountPath: "/entrypoint"
+                  name: entrypoint
+          volumes:
+            - name: entrypoint
+              configMap:
+                name: imagepullsecret-injector-cert-gen-entrypoint
+                items:
+                  - key: entrypoint.sh
+                    path: entrypoint.sh
+                    mode: 0755

helm/imagepullsecret-injector/templates/certificate-gen/job-certificate-gen.yaml

@@ -0,0 +1,30 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: "{{ .Release.Name }}"
+  labels:
+    {{- include "imagepullsecret-injector.labels" . | nindent 4 }}
+spec:
+  template:
+    spec:
+      serviceAccountName: imagepullsecret-injector-cert-gen
+      restartPolicy: Never
+      containers:
+        - name: pre-install-job
+          image: "{{ .Values.certificateGeneratorImage.registry }}/{{ .Values.certificateGeneratorImage.repository }}:{{ .Values.certificateGeneratorImage.tag | default .Chart.AppVersion }}"
+          command: ["/entrypoint/entrypoint.sh"]
+          args:
+            - --service "{{ include "imagepullsecret-injector.serviceName" . }}"
+            - --namespace "{{ .Release.Namespace }}"
+            - --secret "{{ include "imagepullsecret-injector.certificateSecretName" . }}"
+          volumeMounts:
+            - mountPath: "/entrypoint"
+              name: entrypoint
+      volumes:
+        - name: entrypoint
+          configMap:
+            name: imagepullsecret-injector-cert-gen-entrypoint
+            items:
+              - key: entrypoint.sh
+                path: entrypoint.sh
+                mode: 0755

helm/imagepullsecret-injector/templates/certificate-gen/rbac-certificate-gen.yaml

@@ -0,0 +1,68 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: imagepullsecret-injector-cert-gen
+  namespace : {{ .Release.Namespace }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    k8s-app: imagepullsecret-injector-cert-gen
+  name: imagepullsecret-injector-cert-gen
+rules:
+  - apiGroups:
+      - ""
+    resources:
+      - secrets
+      - serviceaccounts
+    verbs:
+      - list
+      - patch
+      - create
+      - get
+      - delete
+  - apiGroups:
+      - ""
+    resources:
+      - namespaces
+    verbs:
+      - list
+      - get
+  - apiGroups:
+      - "certificates.k8s.io/v1"
+    resources:
+      - certificatesigningrequests
+    verbs:
+      - create
+      - list
+      - get
+  - apiGroups:
+      - "certificates.k8s.io/v1"
+    resources:
+      - certificatesigningrequests/approval
+    verbs:
+      - update
+  - apiGroups:
+      - certificates.k8s.io
+    resources:
+      - signers
+    resourceNames:
+      - kubernetes.io/kubelet-serving
+    verbs:
+      - approve
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: imagepullsecret-injector-cert-gen
+  labels:
+    {{- include "imagepullsecret-injector.labels" . | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: imagepullsecret-injector-cert-gen
+subjects:
+  - kind: ServiceAccount
+    name: imagepullsecret-injector-cert-gen
+    namespace : {{ .Release.Namespace }}

helm/imagepullsecret-injector/templates/cm.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: tmp
+  namespace: {{ .Release.Namespace }}
+data:
+  caBundle: {{ include "imagepullsecret-injector.lookupCaBundle" . | quote }}

helm/imagepullsecret-injector/templates/deployment.yaml

@@ -22,14 +22,16 @@ spec:
           image: "{{ .Values.image.registry }}/{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
           imagePullPolicy: IfNotPresent
           args:
+          - -alsologtostderr
+          - -v=4
           - 2>&1
           env:
             - name: CONFIG_PORT
               value: "8443"
             - name: CONFIG_CERT_PATH
-              value: "/etc/webhook/certs/tls.crt"
+              value: "/etc/webhook/certs/cert.pem"
             - name: CONFIG_KEY_PATH
-              value: "/etc/webhook/certs/tls.key"
+              value: "/etc/webhook/certs/key.pem"
             - name: CONFIG_EXCLUDE_NAMESPACES
               value: {{ join "," .Values.imagepullsecretInjector.excludeNamespaces | quote }}
             - name: CONFIG_SERVICE_ACCOUNTS

helm/imagepullsecret-injector/templates/mutatingwebhook.yaml

@@ -6,8 +6,6 @@ metadata:
   labels:
     app: imagepullsecret-injector
     {{- include "imagepullsecret-injector.labels" . | nindent 4 }}
-  annotations:
-    cert-manager.io/inject-ca-from: {{ .Release.Namespace }}/{{ include "imagepullsecret-injector.certificateName" . }}
 webhooks:
 - name: imagepullsecret-injector.ysoftdevs.github.com
   clientConfig:
@@ -15,7 +13,7 @@ webhooks:
       name: {{ include "imagepullsecret-injector.serviceName" . }}
       namespace : {{ .Release.Namespace }}
       path: "/mutate"
-    caBundle: "Cg=="
+    caBundle: {{ include "imagepullsecret-injector.lookupCaBundle" . }}
   rules:
   - operations: ["CREATE", "UPDATE"]
     apiGroups: [""]
@@ -23,5 +21,3 @@ webhooks:
     resources: ["serviceaccounts"]
   admissionReviewVersions: ["v1", "v1beta1"]
   sideEffects: None
-  # The default "Fail" option prevents Gardener cluster to be hibernated
-  failurePolicy: Ignore

helm/imagepullsecret-injector/templates/rbac.yaml

@@ -25,7 +25,6 @@ rules:
       - create
       - get
       - delete
-      - update
   - apiGroups:
       - ""
     resources:

helm/imagepullsecret-injector/values.yaml

@@ -1,10 +1,15 @@
 image:
-  registry: ghcr.io/ysoftdevs/imagepullsecret-injector
+  registry: marshallmarshall
   repository: imagepullsecret-injector
   pullPolicy: Always
   # Overrides the image tag whose default is the chart appVersion.
   tag: ""
 
+certificateGeneratorImage:
+  registry: marshallmarshall
+  repository: webhook-cert-generator
+  tag: ""
+
 imagepullsecretInjector:
   dockerconfigjsonRef:
     secretName: acr-dockerconfigjson-source
@@ -19,8 +24,3 @@ imagepullsecretInjector:
     - kube-system
     - traefik
     - datadog
-
-certificateGenerator:
-  cronJobSchedule: '0 0 * * 0' # At 00:00 on Sunday
-
-clusterIssuer: "webhook-issuer"