addressing pr comments

This reverts commit a5f4a7a0c1.

Makefile

@@ -11,7 +11,9 @@ versionFile = $(CURDIR)/.VERSION
 curVersion := $(shell cat $(versionFile) | sed 's/^v//')
 
 OPERATOR_NAME := onepassword-connect-operator
-DOCKER_IMG_TAG ?= $(OPERATOR_NAME):v$(curVersion)
+INJECTOR_NAME := onepassword-secrets-injector
+OPERATOR_DOCKER_IMG_TAG ?= $(OPERATOR_NAME):v$(curVersion)
+INJECTOR_DOCKER_IMG_TAG ?= $(INJECTOR_NAME):v$(curVersion)
 
 test:	## Run test suite
 	go test ./...
@@ -20,18 +22,31 @@ test/coverage:	## Run test suite with coverage report
 	go test -v ./... -cover
 
 build/operator:	## Build operator Docker image
-	@docker build -f operator/Dockerfile --build-arg operator_version=$(curVersion) -t $(DOCKER_IMG_TAG) .
+	@docker build -f operator/Dockerfile --build-arg operator_version=$(curVersion) -t $(OPERATOR_DOCKER_IMG_TAG) .
 	@echo "Successfully built and tagged image."
-	@echo "Tag: $(DOCKER_IMG_TAG)"
+	@echo "Tag: $(OPERATOR_DOCKER_IMG_TAG)"
 
 build/operator/local:	## Build local version of the operator Docker image 
-	@docker build -f operator/Dockerfile -t local/$(DOCKER_IMG_TAG) .
+	@docker build -f operator/Dockerfile -t local/$(OPERATOR_DOCKER_IMG_TAG) .
 
 build/operator/binary: clean	## Build operator binary
 	@mkdir -p dist
 	@go build -mod vendor -a -o manager ./operator/cmd/manager/main.go
 	@mv manager ./dist
 
+build/secret-injector:	## Build secret-injector Docker image
+	@docker build -f secret-injector/Dockerfile --build-arg operator_version=$(curVersion) -t $(INJECTOR_DOCKER_IMG_TAG) .
+	@echo "Successfully built and tagged image."
+	@echo "Tag: $(INJECTOR_DOCKER_IMG_TAG)"
+
+build/secret-injector/local:	## Build local version of the secret-injector Docker image 
+	@docker build -f secret-injector/Dockerfile -t local/$(INJECTOR_DOCKER_IMG_TAG) .
+
+build/secret-injector/binary: clean	## Build secret-injector binary
+	@mkdir -p dist
+	@go build -mod vendor -a -o manager ./secret-injector/cmd/manager/main.go
+	@mv manager ./dist
+
 clean:
 	rm -rf ./dist
 

README.md

@@ -12,6 +12,12 @@ The 1Password Connect Kubernetes Operator will continually check for updates fro
 
 [Click here for more details on the 1Password Kubernetes Operator](operator/README.md)
 
+## 1Password Secrets Injector for Kubernetes
+
+The 1Password Secrets Injector implements a mutating webhook to inject 1Password secrets as environment variables into a pod or deployment. Unlike the 1Password Kubernetes Operator, the Secrets Injector does not create a Kubernetes Secret when assigning secrets to your resource.
+
+[Click here for more details on the 1Password Secrets Injector for Kubernetes](secret-injector/README.md)
+
 
 # Security
 

go.mod

@@ -4,6 +4,7 @@ go 1.13
 
 require (
 	github.com/1Password/connect-sdk-go v1.0.1
+	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/operator-framework/operator-sdk v0.19.0
 	github.com/prometheus/common v0.14.0 // indirect
 	github.com/spf13/pflag v1.0.5

go.sum

@@ -370,6 +370,7 @@ github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
 github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
 github.com/golang-migrate/migrate/v4 v4.6.2/go.mod h1:JYi6reN3+Z734VZ0akNuyOJNcrg45ZL7LDBMW3WGJL0=
 github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef h1:veQD95Isof8w9/WXiA+pa3tz3fJXkt5B7QaRBrM62gk=
@@ -1331,6 +1332,7 @@ k8s.io/apimachinery v0.18.2/go.mod h1:9SnR/e11v5IbyPCGbvJViimtJ0SwHG4nfZFjU77ftc
 k8s.io/apiserver v0.0.0-20190918160949-bfa5e2e684ad/go.mod h1:XPCXEwhjaFN29a8NldXA901ElnKeKLrLtREO9ZhFyhg=
 k8s.io/apiserver v0.0.0-20191122221311-9d521947b1e1/go.mod h1:RbsZY5zzBIWnz4KbctZsTVjwIuOpTp4Z8oCgFHN4kZQ=
 k8s.io/apiserver v0.18.0/go.mod h1:3S2O6FeBBd6XTo0njUrLxiqk8GNy6wWOftjhJcXYnjw=
+k8s.io/apiserver v0.18.2 h1:fwKxdTWwwYhxvtjo0UUfX+/fsitsNtfErPNegH2x9ic=
 k8s.io/apiserver v0.18.2/go.mod h1:Xbh066NqrZO8cbsoenCwyDJ1OSi8Ag8I2lezeHxzwzw=
 k8s.io/autoscaler v0.0.0-20190607113959-1b4f1855cb8e/go.mod h1:QEXezc9uKPT91dwqhSJq3GNI3B1HxFRQHiku9kmrsSA=
 k8s.io/cli-runtime v0.18.0/go.mod h1:1eXfmBsIJosjn9LjEBUd2WVPoPAY9XGTqTFcPMIBsUQ=
@@ -1343,6 +1345,7 @@ k8s.io/code-generator v0.18.2/go.mod h1:+UHX5rSbxmR8kzS+FAv7um6dtYrZokQvjHpDSYRV
 k8s.io/component-base v0.0.0-20190918160511-547f6c5d7090/go.mod h1:933PBGtQFJky3TEwYx4aEPZ4IxqhWh3R6DCmzqIn1hA=
 k8s.io/component-base v0.0.0-20191122220729-2684fb322cb9/go.mod h1:NFuUusy/X4Tk21m21tcNUihnmp4OI7lXU7/xA+rYXkc=
 k8s.io/component-base v0.18.0/go.mod h1:u3BCg0z1uskkzrnAKFzulmYaEpZF7XC9Pf/uFyb1v2c=
+k8s.io/component-base v0.18.2 h1:SJweNZAGcUvsypLGNPNGeJ9UgPZQ6+bW+gEHe8uyh/Y=
 k8s.io/component-base v0.18.2/go.mod h1:kqLlMuhJNHQ9lz8Z7V5bxUUtjFZnrypArGl58gmDfUM=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/gengo v0.0.0-20190822140433-26a664648505/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
@@ -1367,6 +1370,7 @@ k8s.io/kube-state-metrics v1.7.2/go.mod h1:U2Y6DRi07sS85rmVPmBFlmv+2peBcL8IWGjM+
 k8s.io/kubectl v0.18.0/go.mod h1:LOkWx9Z5DXMEg5KtOjHhRiC1fqJPLyCr3KtQgEolCkU=
 k8s.io/kubectl v0.18.2 h1:9jnGSOC2DDVZmMUTMi0D1aed438mfQcgqa5TAzVjA1k=
 k8s.io/kubectl v0.18.2/go.mod h1:OdgFa3AlsPKRpFFYE7ICTwulXOcMGXHTc+UKhHKvrb4=
+k8s.io/kubernetes v1.13.0 h1:qTfB+u5M92k2fCCCVP2iuhgwwSOv1EkAkvQY1tQODD8=
 k8s.io/kubernetes v1.13.0/go.mod h1:ocZa8+6APFNC2tX1DZASIbocyYT5jHzqFVsY5aoB7Jk=
 k8s.io/metrics v0.18.0/go.mod h1:8aYTW18koXqjLVKL7Ds05RPMX9ipJZI3mywYvBOxXd4=
 k8s.io/metrics v0.18.2/go.mod h1:qga8E7QfYNR9Q89cSCAjinC9pTZ7yv1XSVGUB0vJypg=

operator/pkg/onepassword/items.go

@@ -13,6 +13,14 @@ var logger = logf.Log.WithName("retrieve_item")
 
 const secretReferencePrefix = "op://"
 
+type InvalidOPFormatError struct {
+	Reference string
+}
+
+func (e *InvalidOPFormatError) Error() string {
+	return fmt.Sprintf("Invalid secret reference : %s. Secret references should start with op://", e.Reference)
+}
+
 func GetOnePasswordItemByPath(opConnectClient connect.Client, path string) (*onepassword.Item, error) {
 	vaultValue, itemValue, err := ParseVaultAndItemFromPath(path)
 	if err != nil {
@@ -37,7 +45,7 @@ func GetOnePasswordItemByPath(opConnectClient connect.Client, path string) (*one
 
 func ParseReference(reference string) (string, string, error) {
 	if !strings.HasPrefix(reference, secretReferencePrefix) {
-		return "", "", fmt.Errorf("secret reference should start with `op://`")
+		return "", "", &InvalidOPFormatError{Reference: reference}
 	}
 	path := strings.TrimPrefix(reference, secretReferencePrefix)
 

operator/pkg/onepassword/onepassword_item.go

@@ -2,12 +2,13 @@ package onepassword
 
 import (
 	"context"
+	"errors"
 	"fmt"
 
 	"github.com/1Password/connect-sdk-go/connect"
 	onepasswordv1 "github.com/1Password/onepassword-operator/operator/pkg/apis/onepassword/v1"
 	"github.com/1Password/onepassword-operator/operator/pkg/utils"
-	"k8s.io/apimachinery/pkg/api/errors"
+	k8sErrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
 
@@ -41,6 +42,10 @@ func CreateOnePasswordCRSecretsFromContainer(opClient connect.Client, kubeClient
 		// if value is not of format op://<vault>/<item>/<field> then ignore
 		vault, item, err := ParseReference(env.Value)
 		if err != nil {
+			var ev *InvalidOPFormatError
+			if !errors.As(err, &ev) {
+				return err
+			}
 			continue
 		}
 		// create a one password item custom resource to track updates for injected secrets
@@ -64,7 +69,7 @@ func CreateOnePasswordCRSecretFromReference(opClient connect.Client, kubeClient
 
 	currentOnepassworditem := &onepasswordv1.OnePasswordItem{}
 	err = kubeClient.Get(context.Background(), types.NamespacedName{Name: onepassworditem.Name, Namespace: onepassworditem.Namespace}, currentOnepassworditem)
-	if err != nil && errors.IsNotFound(err) {
+	if k8sErrors.IsNotFound(err) {
 		log.Info(fmt.Sprintf("Creating OnePasswordItem CR %v at namespace '%v'", onepassworditem.Name, onepassworditem.Namespace))
 		return kubeClient.Create(context.Background(), onepassworditem)
 	} else if err != nil {

operator/pkg/onepassword/onepassword_item_test.go

@@ -0,0 +1,234 @@
+package onepassword
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/1Password/onepassword-operator/operator/pkg/mocks"
+
+	"github.com/1Password/connect-sdk-go/onepassword"
+	onepasswordv1 "github.com/1Password/onepassword-operator/operator/pkg/apis/onepassword/v1"
+	"github.com/stretchr/testify/assert"
+	appsv1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	errors2 "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubectl/pkg/scheme"
+	"sigs.k8s.io/controller-runtime/pkg/client/fake"
+)
+
+type onepassworditemInjections struct {
+	testName           string
+	existingDeployment *appsv1.Deployment
+	existingNamespace  *corev1.Namespace
+	expectedError      error
+	expectedEvents     []string
+	opItem             map[string]string
+	expectedOPItem     *onepasswordv1.OnePasswordItem
+}
+
+var onepassworditemTests = []onepassworditemInjections{
+	{
+		testName:          "Try to Create OnePasswordItem with container with valid op reference",
+		existingNamespace: defaultNamespace,
+		existingDeployment: &appsv1.Deployment{
+			TypeMeta: metav1.TypeMeta{
+				Kind:       deploymentKind,
+				APIVersion: deploymentAPIVersion,
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      name,
+				Namespace: namespace,
+			},
+			Spec: appsv1.DeploymentSpec{
+				Template: corev1.PodTemplateSpec{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      name,
+						Namespace: namespace,
+						Annotations: map[string]string{
+							ContainerInjectAnnotation: "test-app",
+						},
+					},
+					Spec: corev1.PodSpec{
+						Containers: []corev1.Container{
+							{
+								Name: "test-app",
+								Env: []corev1.EnvVar{
+									{
+										Name:  name,
+										Value: fmt.Sprintf("op://%s/%s/test", vaultId, itemId),
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+		expectedError: nil,
+		opItem: map[string]string{
+			userKey: username,
+			passKey: password,
+		},
+		expectedOPItem: &onepasswordv1.OnePasswordItem{
+			TypeMeta: metav1.TypeMeta{
+				Kind:       "OnePasswordItem",
+				APIVersion: "onepassword.com/v1",
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      injectedOnePasswordItemName,
+				Namespace: namespace,
+				Annotations: map[string]string{
+					InjectedAnnotation: "true",
+					VersionAnnotation:  "old",
+				},
+			},
+			Spec: onepasswordv1.OnePasswordItemSpec{
+				ItemPath: itemPath,
+			},
+		},
+	},
+	{
+		testName:          "Container with no op:// reference does not create OnePasswordItem",
+		existingNamespace: defaultNamespace,
+		existingDeployment: &appsv1.Deployment{
+			TypeMeta: metav1.TypeMeta{
+				Kind:       deploymentKind,
+				APIVersion: deploymentAPIVersion,
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      name,
+				Namespace: namespace,
+			},
+			Spec: appsv1.DeploymentSpec{
+				Template: corev1.PodTemplateSpec{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      name,
+						Namespace: namespace,
+						Annotations: map[string]string{
+							ContainerInjectAnnotation: "test-app",
+						},
+					},
+					Spec: corev1.PodSpec{
+						Containers: []corev1.Container{
+							{
+								Name: "test-app",
+								Env: []corev1.EnvVar{
+									{
+										Name:  name,
+										Value: fmt.Sprintf("some value"),
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+		expectedError: nil,
+		opItem: map[string]string{
+			userKey: username,
+			passKey: password,
+		},
+		expectedOPItem: nil,
+	},
+	{
+		testName:          "Container with op:// reference missing vault and item does not create OnePasswordItem and returns error",
+		existingNamespace: defaultNamespace,
+		existingDeployment: &appsv1.Deployment{
+			TypeMeta: metav1.TypeMeta{
+				Kind:       deploymentKind,
+				APIVersion: deploymentAPIVersion,
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      name,
+				Namespace: namespace,
+			},
+			Spec: appsv1.DeploymentSpec{
+				Template: corev1.PodTemplateSpec{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      name,
+						Namespace: namespace,
+						Annotations: map[string]string{
+							ContainerInjectAnnotation: "test-app",
+						},
+					},
+					Spec: corev1.PodSpec{
+						Containers: []corev1.Container{
+							{
+								Name: "test-app",
+								Env: []corev1.EnvVar{
+									{
+										Name:  name,
+										Value: fmt.Sprintf("op://"),
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+		expectedError: fmt.Errorf("Invalid secret reference : %s. Secret references should match op://<vault>/<item>/<field>", "op://"),
+		opItem: map[string]string{
+			userKey: username,
+			passKey: password,
+		},
+		expectedOPItem: nil,
+	},
+}
+
+func TestOnePasswordItemSecretInjected(t *testing.T) {
+	for _, testData := range onepassworditemTests {
+		t.Run(testData.testName, func(t *testing.T) {
+
+			// Register operator types with the runtime scheme.
+			s := scheme.Scheme
+			s.AddKnownTypes(appsv1.SchemeGroupVersion, &onepasswordv1.OnePasswordItem{}, &onepasswordv1.OnePasswordItemList{}, &appsv1.Deployment{})
+
+			// Objects to track in the fake client.
+			objs := []runtime.Object{
+				testData.existingDeployment,
+				testData.existingNamespace,
+			}
+
+			// Create a fake client to mock API calls.
+			cl := fake.NewFakeClientWithScheme(s, objs...)
+
+			opConnectClient := &mocks.TestClient{}
+			mocks.GetGetItemFunc = func(uuid string, vaultUUID string) (*onepassword.Item, error) {
+
+				item := onepassword.Item{}
+				item.Fields = generateFields(testData.opItem["username"], testData.opItem["password"])
+				item.Version = itemVersion
+				item.Vault.ID = vaultUUID
+				item.ID = uuid
+				return &item, nil
+			}
+
+			injectedContainers := testData.existingDeployment.Spec.Template.ObjectMeta.Annotations[ContainerInjectAnnotation]
+			parsedInjectedContainers := strings.Split(injectedContainers, ",")
+			err := CreateOnePasswordItemResourceFromDeployment(opConnectClient, cl, testData.existingDeployment, parsedInjectedContainers)
+
+			assert.Equal(t, testData.expectedError, err)
+
+			// Check if Secret has been created and has the correct data
+			opItemCR := &onepasswordv1.OnePasswordItem{}
+			err = cl.Get(context.TODO(), types.NamespacedName{Name: injectedOnePasswordItemName, Namespace: namespace}, opItemCR)
+
+			if testData.expectedOPItem == nil {
+				assert.Error(t, err)
+				assert.True(t, errors2.IsNotFound(err))
+			} else {
+				assert.Equal(t, testData.expectedOPItem.Spec.ItemPath, opItemCR.Spec.ItemPath)
+				assert.Equal(t, testData.expectedOPItem.Name, opItemCR.Name)
+				assert.Equal(t, testData.expectedOPItem.Annotations[InjectedAnnotation], opItemCR.Annotations[InjectedAnnotation])
+			}
+
+		})
+	}
+}

operator/pkg/onepassword/secret_update_handler.go

@@ -162,14 +162,14 @@ func (h *SecretUpdateHandler) updateInjectedSecrets() (map[string]map[string]*on
 	onepasswordItems := &onepasswordv1.OnePasswordItemList{}
 	err := h.client.List(context.Background(), onepasswordItems)
 	if err != nil {
-		log.Error(err, "Failed to list OneOasswordItems")
+		log.Error(err, "Failed to list OnePasswordItems")
 		return nil, err
 	}
 
 	updatedItems := map[string]map[string]*onepasswordv1.OnePasswordItem{}
 	for _, item := range onepasswordItems.Items {
 
-		// if onepassworditem was generated by injecting a secret into a deployment then ignore
+		// if onepassworditem was not generated by injecting a secret into a deployment then ignore
 		_, injected := item.Annotations[InjectedAnnotation]
 		if !injected {
 			continue

secret-injector/Dockerfile

@@ -0,0 +1,30 @@
+# Build the manager binary
+FROM golang:1.17 as builder
+
+WORKDIR /workspace
+# Copy the Go Modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+
+# Copy the go source
+COPY secret-injector/cmd/main.go secret-injector/main.go
+COPY secret-injector/pkg/ secret-injector/pkg/
+COPY vendor/ vendor/
+# Build
+ARG secret_injector_version=dev
+RUN CGO_ENABLED=0 \
+    GO111MODULE=on \
+    go build \
+    -ldflags "-X \"github.com/1Password/onepassword-operator/secret-injector/version.Version=$secret_injector_version\"" \
+    -mod vendor \
+    -a -o injector secret-injector/main.go
+
+# Use distroless as minimal base image to package the secret-injector binary
+# Refer to https://github.com/GoogleContainerTools/distroless for more details
+FROM gcr.io/distroless/static:nonroot
+WORKDIR /
+COPY --from=builder /workspace/injector .
+USER nonroot:nonroot
+
+ENTRYPOINT ["/injector"]
+

secret-injector/README.md

@@ -0,0 +1,123 @@
+# 1Password Secrets Injector for Kubernetes
+The 1Password Secrets Injector implements a mutating webhook to inject 1Password secrets as environment variables into a pod or deployment. Unlike the 1Password Kubernetes Operator, the Secrets Injector does not create a Kubernetes Secret when assigning secrets to your resource.
+
+## Use with the 1Password Kubernetes Operator
+The 1Password Secrets Injector for Kubernetes can be used in conjuction with the 1Password Kubernetes Operator in order to provide automatic deployment restarts when a 1Password item being used by your deployment has been updated.
+
+
+[Click here for more details on the 1Password Kubernetes Operator](../operator/README.md)
+
+## Setup and Deployment
+
+The 1Password Secrets Injector for Kubernetes uses a webhook server in order to inject secrets into pods and deployments. Admission to the webhook server must be a secure operation, thus communication with the webhook server requires a TLS certificate signed by a Kubernetes CA.
+
+For managing TLS certifcates for your cluster please see the [official documentation](https://kubernetes.io/docs/tasks/tls/managing-tls-in-a-cluster/). The certificate and key generated in the offical documentation must be set in the [deployment](deploy/deployment.yaml) arguments (`tlsCertFile` and `tlsKeyFile` respectively) for the Secret injector.
+
+In additon to setting the tlsCert and tlsKey for the Secret Injector service, we must also create a webhook configuration  for the service. An example of the confiugration can be found [here](deploy/mutatingwebhook.yaml). In the provided example you may notice that the caBundle is not set. Please replace this value with your caBundle. This can be generated with the Kubernetes apiserver's default caBundle with the following command
+
+```export CA_BUNDLE=$(kubectl get configmap -n kube-system extension-apiserver-authentication -o=jsonpath='{.data.client-ca-file}' | base64 | tr -d '\n')```
+
+```
+apiVersion: admissionregistration.k8s.io/v1beta1
+kind: MutatingWebhookConfiguration
+metadata:
+  name: op-secret-injector-webhook-config
+  labels:
+    app: op-secret-injector
+webhooks:
+- name: op-secret-injector.1password
+  failurePolicy: Fail
+  clientConfig:
+    service:
+      name: op-secret-injector-webhook-service
+      namespace: op-secret-injector
+      path: "/inject"
+    caBundle: ${CA_BUNDLE} //replace this with your own CA Bundle
+  rules:
+  - operations: ["CREATE", "UPDATE"]
+    apiGroups: [""]
+    apiVersions: ["v1"]
+    resources: ["pods"]
+  namespaceSelector:
+    matchLabels:
+      op-secret-injection: enabled
+```
+
+You can automate this step using the script by [morvencao](https://github.com/morvencao/kube-mutating-webhook-tutorial). 
+
+```
+cat deploy/mutatingwebhook.yaml | \
+    deploy/webhook-patch-ca-bundle.sh > \
+    deploy/mutatingwebhook-ca-bundle.yaml
+```
+
+Lastly, we must apply the deployment, service, and mutating webhook configuration to kubernetes:
+
+```
+kubectl create -f deploy/deployment.yaml
+kubectl create -f deploy/service.yaml
+kubectl create -f deploy/mutatingwebhook-ca-bundle.yaml
+```
+
+## Usage
+
+For every namespace you want the 1Password Secret Injector to inject secrets for, you must add the label `op-secret-injection=enabled` label to the namespace:
+
+```
+kubectl label namespace <namespace> op-secret-injection=enabled
+```
+
+To inject a 1Password secret as an environment variable, your pod or deployment you must add an environment variable to the resource with a value referencing your 1Password item in the format `op://<vault>/<item>[/section]/<field>`. You must also annotate your pod/deployment spec with `operator.1password.io/inject` which expects a comma separated list of the names of the containers to that will be mutated and have secrets injected.
+
+Note: You must also include the command needed to run the container as the secret injector prepends a script to this command in order to allow for secret injection.
+
+```
+#example
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: app-example
+spec:
+  selector:
+    matchLabels:
+      app: app-example
+  template:
+    metadata:
+      annotations:
+        operator.1password.io/inject: "app-example,another-example" 
+      labels:
+        app: app-example
+    spec:
+      containers:
+        - name: app-example
+          image: my-image
+          command: ["./example"]
+          env:
+          - name: DB_USERNAME
+            value: op://my-vault/my-item/sql/username
+          - name: DB_PASSWORD
+            value: op://my-vault/my-item/sql/password
+        - name: another-example
+          image: my-image
+          env:
+          - name: DB_USERNAME
+            value: op://my-vault/my-item/sql/username
+          - name: DB_PASSWORD
+            value: op://my-vault/my-item/sql/password
+        - name: my-app //because my-app is not listed in the inject annotation above this container will not be injected with secrets
+          image: my-image
+          env:
+          - name: DB_USERNAME
+            value: op://my-vault/my-item/sql/username
+          - name: DB_PASSWORD
+            value: op://my-vault/my-item/sql/password
+```
+## Troubleshooting
+
+If you are trouble getting secrets injected in your pod, check the following:
+
+1. Check that that the namespace of your pod has the `op-secret-injection=enabled` label
+2. Check that the `caBundle` in `mutatingwebhookconfiguration.yaml` is set with a correct value
+3. Ensure that the 1Password Secret Injector webhook is running (`op-secret-injector` by default).
+4. Check that your container has a `command` field specifying the command to run the app in your container

secret-injector/cmd/main.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"context"
+	"crypto/tls"
+	"flag"
+	"fmt"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/1Password/onepassword-operator/secret-injector/pkg/webhook"
+	"github.com/golang/glog"
+)
+
+const (
+	connectTokenSecretKeyEnv  = "OP_CONNECT_TOKEN_KEY"
+	connectTokenSecretNameEnv = "OP_CONNECT_TOKEN_NAME"
+	connectHostEnv            = "OP_CONNECT_HOST"
+)
+
+func main() {
+	var parameters webhook.SecretInjectorParameters
+
+	glog.Info("Starting webhook")
+	// get command line parameters
+	flag.IntVar(&parameters.Port, "port", 8443, "Webhook server port.")
+	flag.StringVar(&parameters.CertFile, "tlsCertFile", "/etc/webhook/certs/cert.pem", "File containing the x509 Certificate for HTTPS.")
+	flag.StringVar(&parameters.KeyFile, "tlsKeyFile", "/etc/webhook/certs/key.pem", "File containing the x509 private key to --tlsCertFile.")
+	flag.Parse()
+
+	pair, err := tls.LoadX509KeyPair(parameters.CertFile, parameters.KeyFile)
+	if err != nil {
+		glog.Errorf("Failed to load key pair: %v", err)
+		os.Exit(1)
+	}
+
+	connectHost, present := os.LookupEnv(connectHostEnv)
+	if !present || connectHost == "" {
+		glog.Error("Connect host not set")
+	}
+
+	connectTokenName, present := os.LookupEnv(connectTokenSecretNameEnv)
+	if !present || connectTokenName == "" {
+		glog.Error("Connect token name not set")
+	}
+
+	connectTokenKey, present := os.LookupEnv(connectTokenSecretKeyEnv)
+	if !present || connectTokenKey == "" {
+		glog.Error("Connect token key not set")
+	}
+
+	webhookConfig := webhook.Config{
+		ConnectHost:      connectHost,
+		ConnectTokenName: connectTokenName,
+		ConnectTokenKey:  connectTokenKey,
+	}
+	secretInjector := &webhook.SecretInjector{
+		Config: webhookConfig,
+		Server: &http.Server{
+			Addr:      fmt.Sprintf(":%v", parameters.Port),
+			TLSConfig: &tls.Config{Certificates: []tls.Certificate{pair}},
+		},
+	}
+
+	// define http server and server handler
+	mux := http.NewServeMux()
+	mux.HandleFunc("/inject", secretInjector.Serve)
+	secretInjector.Server.Handler = mux
+
+	// start webhook server in new rountine
+	go func() {
+		if err := secretInjector.Server.ListenAndServeTLS("", ""); err != nil {
+			glog.Errorf("Failed to listen and serve webhook server: %v", err)
+			os.Exit(1)
+		}
+	}()
+
+	// listening OS shutdown singal
+	signalChan := make(chan os.Signal, 1)
+	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
+	<-signalChan
+
+	glog.Infof("Got OS shutdown signal, shutting down webhook server gracefully...")
+	secretInjector.Server.Shutdown(context.Background())
+}

secret-injector/deploy/deployment.yaml

@@ -0,0 +1,42 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: op-secret-injector-webhook-deployment
+  namespace: op-secret-injector
+  labels:
+    app: op-secret-injector
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: op-secret-injector
+  template:
+    metadata:
+      labels:
+        app: op-secret-injector
+    spec:
+      containers:
+        - name: op-secret-injector
+          image: local/onepassword-secrets-injector:v1.1.0
+          imagePullPolicy: Never
+          args:
+          - -tlsCertFile=/etc/webhook/certs/cert.pem
+          - -tlsKeyFile=/etc/webhook/certs/key.pem
+          - -alsologtostderr
+          - -v=4
+          - 2>&1
+          env:
+          - name: OP_CONNECT_HOST
+            value: http://onepassword-connect:8080/
+          - name: OP_CONNECT_TOKEN_NAME
+            value: onepassword-token
+          - name: OP_CONNECT_TOKEN_KEY
+            value: token
+          volumeMounts:
+          - name: webhook-certs
+            mountPath: /etc/webhook/certs
+            readOnly: true
+      volumes:
+      - name: webhook-certs
+        secret:
+          secretName: op-secret-injector-webhook-certs

secret-injector/deploy/mutatingwebhook.yaml

@@ -0,0 +1,23 @@
+apiVersion: admissionregistration.k8s.io/v1beta1
+kind: MutatingWebhookConfiguration
+metadata:
+  name: op-secret-injector-webhook-config
+  labels:
+    app: op-secret-injector
+webhooks:
+- name: op-secret-injector.1password
+  failurePolicy: Fail
+  clientConfig:
+    service:
+      name: op-secret-injector-webhook-service
+      namespace: op-secret-injector
+      path: "/inject"
+    caBundle: ${CA_BUNDLE}
+  rules:
+  - operations: ["CREATE", "UPDATE"]
+    apiGroups: [""]
+    apiVersions: ["v1"]
+    resources: ["pods"]
+  namespaceSelector:
+    matchLabels:
+      op-secret-injection: enabled

secret-injector/deploy/service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: op-secret-injector-webhook-service
+  namespace: op-secret-injector
+  labels:
+    app: op-secret-injector
+spec:
+  ports:
+  - port: 443
+    targetPort: 8443
+  selector:
+    app: op-secret-injector

secret-injector/pkg/webhook/webhook.go

@@ -0,0 +1,494 @@
+package webhook
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+
+	"github.com/golang/glog"
+	"k8s.io/api/admission/v1beta1"
+	admissionregistrationv1beta1 "k8s.io/api/admissionregistration/v1beta1"
+	v1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/serializer"
+)
+
+const (
+	// binVolumeName is the name of the volume where the OP CLI binary is stored.
+	binVolumeName = "op-bin"
+
+	// binVolumeMountPath is the mount path where the OP CLI binary can be found.
+	binVolumeMountPath = "/op/bin/"
+
+	connectTokenEnv = "OP_CONNECT_TOKEN"
+	connectHostEnv  = "OP_CONNECT_HOST"
+)
+
+// binVolume is the shared, in-memory volume where the OP CLI binary lives.
+var binVolume = corev1.Volume{
+	Name: binVolumeName,
+	VolumeSource: corev1.VolumeSource{
+		EmptyDir: &corev1.EmptyDirVolumeSource{
+			Medium: corev1.StorageMediumMemory,
+		},
+	},
+}
+
+// binVolumeMount is the shared volume mount where the OP CLI binary lives.
+var binVolumeMount = corev1.VolumeMount{
+	Name:      binVolumeName,
+	MountPath: binVolumeMountPath,
+	ReadOnly:  true,
+}
+
+var (
+	runtimeScheme = runtime.NewScheme()
+	codecs        = serializer.NewCodecFactory(runtimeScheme)
+	deserializer  = codecs.UniversalDeserializer()
+
+	// (https://github.com/kubernetes/kubernetes/issues/57982)
+	defaulter = runtime.ObjectDefaulter(runtimeScheme)
+)
+
+const (
+	injectionStatus   = "operator.1password.io/status"
+	injectAnnotation  = "operator.1password.io/inject"
+	versionAnnotation = "operator.1password.io/version"
+)
+
+type SecretInjector struct {
+	Config Config
+	Server *http.Server
+}
+
+// the command line parameters for configuraing the webhook
+type SecretInjectorParameters struct {
+	Port     int    // webhook server port
+	CertFile string // path to the x509 certificate for https
+	KeyFile  string // path to the x509 private key matching `CertFile`
+}
+
+type Config struct {
+	ConnectHost      string // the host in which a connect server is running
+	ConnectTokenName string // the token name of the secret that stores the connect token
+	ConnectTokenKey  string // the name of the data field in the secret the stores the connect token
+}
+
+type patchOperation struct {
+	Op    string      `json:"op"`
+	Path  string      `json:"path"`
+	Value interface{} `json:"value,omitempty"`
+}
+
+func init() {
+	_ = corev1.AddToScheme(runtimeScheme)
+	_ = admissionregistrationv1beta1.AddToScheme(runtimeScheme)
+	_ = v1.AddToScheme(runtimeScheme)
+}
+
+func applyDefaultsWorkaround(containers []corev1.Container, volumes []corev1.Volume) {
+	defaulter.Default(&corev1.Pod{
+		Spec: corev1.PodSpec{
+			Containers: containers,
+			Volumes:    volumes,
+		},
+	})
+}
+
+// Check if the pod should have secrets injected
+func mutationRequired(metadata *metav1.ObjectMeta) bool {
+
+	annotations := metadata.GetAnnotations()
+	if annotations == nil {
+		annotations = map[string]string{}
+	}
+
+	status := annotations[injectionStatus]
+	_, enabled := annotations[injectAnnotation]
+
+	// if pod has not already been injected and injection has been enabled mark the pod for injection
+	required := false
+	if strings.ToLower(status) != "injected" && enabled {
+		required = true
+	}
+
+	glog.Infof("Pod %v at namepspace %v. Secret injection status: %v Secret Injection Enabled:%v", metadata.Name, metadata.Namespace, status, required)
+	return required
+}
+
+func addContainers(target, added []corev1.Container, basePath string) (patch []patchOperation) {
+	first := len(target) == 0
+	var value interface{}
+	for _, add := range added {
+		value = add
+		path := basePath
+		if first {
+			first = false
+			value = []corev1.Container{add}
+		} else {
+			path = path + "/-"
+		}
+		patch = append(patch, patchOperation{
+			Op:    "add",
+			Path:  path,
+			Value: value,
+		})
+	}
+	return patch
+}
+
+func addVolume(target, added []corev1.Volume, basePath string) (patch []patchOperation) {
+	first := len(target) == 0
+	var value interface{}
+	for _, add := range added {
+		value = add
+		path := basePath
+		if first {
+			first = false
+			value = []corev1.Volume{add}
+		} else {
+			path = path + "/-"
+		}
+		patch = append(patch, patchOperation{
+			Op:    "add",
+			Path:  path,
+			Value: value,
+		})
+	}
+	return patch
+}
+
+func updateAnnotation(target map[string]string, added map[string]string) (patch []patchOperation) {
+	for key, value := range added {
+		if target == nil || target[key] == "" {
+			target = map[string]string{}
+			patch = append(patch, patchOperation{
+				Op:   "add",
+				Path: "/metadata/annotations",
+				Value: map[string]string{
+					key: value,
+				},
+			})
+		} else {
+			patch = append(patch, patchOperation{
+				Op:    "replace",
+				Path:  "/metadata/annotations/" + key,
+				Value: value,
+			})
+		}
+	}
+	return patch
+}
+
+// mutation process for injecting secrets into pods
+func (s *SecretInjector) mutate(ar *v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
+	ctx := context.Background()
+	req := ar.Request
+	var pod corev1.Pod
+	if err := json.Unmarshal(req.Object.Raw, &pod); err != nil {
+		glog.Errorf("Could not unmarshal raw object: %v", err)
+		return &v1beta1.AdmissionResponse{
+			Result: &metav1.Status{
+				Message: err.Error(),
+			},
+		}
+	}
+
+	glog.Infof("Checking if secret injection is needed for %v %s at namespace %v",
+		req.Kind, pod.Name, req.Namespace)
+
+	// determine whether to inject secrets
+	if !mutationRequired(&pod.ObjectMeta) {
+		glog.Infof("Secret injection not required for %s at namespace %s", pod.Name, pod.Namespace)
+		return &v1beta1.AdmissionResponse{
+			Allowed: true,
+		}
+	}
+
+	containersStr := pod.Annotations[injectAnnotation]
+
+	containers := map[string]struct{}{}
+
+	if containersStr == "" {
+		glog.Infof("No containers set for secret injection for %s/%s", pod.Namespace, pod.Name)
+		return &v1beta1.AdmissionResponse{
+			Allowed: true,
+		}
+	}
+	for _, container := range strings.Split(containersStr, ",") {
+		containers[container] = struct{}{}
+	}
+
+	version, ok := pod.Annotations[versionAnnotation]
+	if !ok {
+		version = "2.0.0-beta.4"
+	}
+
+	mutated := false
+
+	var patch []patchOperation
+	for i, c := range pod.Spec.InitContainers {
+		_, mutate := containers[c.Name]
+		if !mutate {
+			continue
+		}
+		c, didMutate, initContainerPatch, err := s.mutateContainer(ctx, &c, i)
+		if err != nil {
+			return &v1beta1.AdmissionResponse{
+				Result: &metav1.Status{
+					Message: err.Error(),
+				},
+			}
+		}
+		if didMutate {
+			mutated = true
+			pod.Spec.InitContainers[i] = *c
+		}
+		patch = append(patch, initContainerPatch...)
+	}
+
+	for i, c := range pod.Spec.Containers {
+		_, mutate := containers[c.Name]
+		if !mutate {
+			continue
+		}
+
+		c, didMutate, containerPatch, err := s.mutateContainer(ctx, &c, i)
+		if err != nil {
+			glog.Error("Error occured mutating container for secret injection: ", err)
+			return &v1beta1.AdmissionResponse{
+				Result: &metav1.Status{
+					Message: err.Error(),
+				},
+			}
+		}
+		patch = append(patch, containerPatch...)
+		if didMutate {
+			mutated = true
+			pod.Spec.Containers[i] = *c
+		}
+	}
+
+	if !mutated {
+		glog.Infof("No containers set for secret injection for %s/%s", pod.Namespace, pod.Name)
+		return &v1beta1.AdmissionResponse{
+			Allowed: true,
+		}
+	}
+
+	// binInitContainer is the container that pulls the OP CLI
+	// into a shared volume mount.
+	var binInitContainer = corev1.Container{
+		Name:            "copy-op-bin",
+		Image:           "1password/op" + ":" + version,
+		ImagePullPolicy: corev1.PullIfNotPresent,
+		Command: []string{"sh", "-c",
+			fmt.Sprintf("cp /usr/local/bin/op %s", binVolumeMountPath)},
+		VolumeMounts: []corev1.VolumeMount{
+			{
+				Name:      binVolumeName,
+				MountPath: binVolumeMountPath,
+			},
+		},
+	}
+
+	patchBytes, err := createOPCLIPatch(&pod, []corev1.Container{binInitContainer}, patch)
+	if err != nil {
+		return &v1beta1.AdmissionResponse{
+			Result: &metav1.Status{
+				Message: err.Error(),
+			},
+		}
+	}
+
+	glog.Infof("AdmissionResponse: patch=%v\n", string(patchBytes))
+	return &v1beta1.AdmissionResponse{
+		Allowed: true,
+		Patch:   patchBytes,
+		PatchType: func() *v1beta1.PatchType {
+			pt := v1beta1.PatchTypeJSONPatch
+			return &pt
+		}(),
+	}
+}
+
+// create mutation patch for resoures
+func createOPCLIPatch(pod *corev1.Pod, containers []corev1.Container, patch []patchOperation) ([]byte, error) {
+
+	annotations := map[string]string{injectionStatus: "injected"}
+	patch = append(patch, addVolume(pod.Spec.Volumes, []corev1.Volume{binVolume}, "/spec/volumes")...)
+	patch = append(patch, addContainers(pod.Spec.InitContainers, containers, "/spec/initContainers")...)
+	patch = append(patch, updateAnnotation(pod.Annotations, annotations)...)
+
+	return json.Marshal(patch)
+}
+
+func createOPConnectPatch(container *corev1.Container, containerIndex int, host, tokenSecretName, tokenSecretKey string) []patchOperation {
+	var patch []patchOperation
+	envs := []corev1.EnvVar{}
+
+	// if connect configuration is already set in the container do not overwrite it
+	hostConfig, tokenConfig := isConnectConfigurationSet(container)
+
+	if !hostConfig {
+		connectHostEnvVar := corev1.EnvVar{
+			Name:  "OP_CONNECT_HOST",
+			Value: host,
+		}
+		envs = append(envs, connectHostEnvVar)
+	}
+
+	if !tokenConfig {
+		connectTokenEnvVar := corev1.EnvVar{
+			Name: "OP_CONNECT_TOKEN",
+			ValueFrom: &corev1.EnvVarSource{
+				SecretKeyRef: &corev1.SecretKeySelector{
+					Key: tokenSecretKey,
+					LocalObjectReference: corev1.LocalObjectReference{
+						Name: tokenSecretName,
+					},
+				},
+			},
+		}
+		envs = append(envs, connectTokenEnvVar)
+	}
+
+	patch = append(patch, setEnvironment(*container, containerIndex, envs, "/spec/containers")...)
+
+	return patch
+}
+
+func isConnectConfigurationSet(container *corev1.Container) (bool, bool) {
+
+	hostConfig := false
+	tokenConfig := false
+
+	for _, env := range container.Env {
+		if env.Name == connectHostEnv {
+			hostConfig = true
+		}
+
+		if env.Name == connectTokenEnv {
+			tokenConfig = true
+		}
+
+		if tokenConfig && hostConfig {
+			break
+		}
+	}
+	return hostConfig, tokenConfig
+}
+
+// mutates the container to allow for secrets to be injected into the container via the op cli
+func (s *SecretInjector) mutateContainer(_ context.Context, container *corev1.Container, containerIndex int) (*corev1.Container, bool, []patchOperation, error) {
+	//  prepending op run command to the container command so that secrets are injected before the main process is started
+	if len(container.Command) == 0 {
+		return container, false, nil, fmt.Errorf("not attaching OP to the container %s: the podspec does not define a command", container.Name)
+	}
+
+	// Prepend the command with op run --
+	container.Command = append([]string{binVolumeMountPath + "op", "run", "--"}, container.Command...)
+
+	var patch []patchOperation
+
+	// adding the cli to the container using a volume mount
+	path := fmt.Sprintf("%s/%d/volumeMounts", "/spec/containers", containerIndex)
+	patch = append(patch, patchOperation{
+		Op:    "add",
+		Path:  path,
+		Value: []corev1.VolumeMount{binVolumeMount},
+	})
+
+	// replacing the container command with a command prepended with op run
+	path = fmt.Sprintf("%s/%d/command", "/spec/containers", containerIndex)
+	patch = append(patch, patchOperation{
+		Op:    "replace",
+		Path:  path,
+		Value: container.Command,
+	})
+
+	//creating patch for adding connect environment variables to container. If they are already set in the container then this will be skipped
+	patch = append(patch, createOPConnectPatch(container, containerIndex, s.Config.ConnectHost, s.Config.ConnectTokenName, s.Config.ConnectTokenKey)...)
+	return container, true, patch, nil
+}
+
+func setEnvironment(container corev1.Container, containerIndex int, addedEnv []corev1.EnvVar, basePath string) (patch []patchOperation) {
+	first := len(container.Env) == 0
+	var value interface{}
+	for _, add := range addedEnv {
+		path := fmt.Sprintf("%s/%d/env", basePath, containerIndex)
+		value = add
+		if first {
+			first = false
+			value = []corev1.EnvVar{add}
+		} else {
+			path = path + "/-"
+		}
+		patch = append(patch, patchOperation{
+			Op:    "add",
+			Path:  path,
+			Value: value,
+		})
+	}
+	return patch
+}
+
+// Serve method for secrets injector webhook
+func (s *SecretInjector) Serve(w http.ResponseWriter, r *http.Request) {
+	var body []byte
+	if r.Body != nil {
+		if data, err := ioutil.ReadAll(r.Body); err == nil {
+			body = data
+		}
+	}
+	if len(body) == 0 {
+		glog.Error("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" {
+		glog.Errorf("Content-Type=%s, expect application/json", contentType)
+		http.Error(w, "invalid Content-Type, expect `application/json`", http.StatusUnsupportedMediaType)
+		return
+	}
+
+	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 = s.mutate(&ar)
+	}
+
+	admissionReview := v1beta1.AdmissionReview{}
+	if admissionResponse != nil {
+		admissionReview.Response = admissionResponse
+		if ar.Request != nil {
+			admissionReview.Response.UID = ar.Request.UID
+		}
+	}
+
+	resp, err := json.Marshal(admissionReview)
+	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)
+	}
+}

secret-injector/version/version.go

@@ -0,0 +1,5 @@
+package version
+
+var (
+	Version = "0.0.1"
+)

vendor/github.com/golang/glog/LICENSE

@@ -0,0 +1,191 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+"License" shall mean the terms and conditions for use, reproduction, and
+distribution as defined by Sections 1 through 9 of this document.
+
+"Licensor" shall mean the copyright owner or entity authorized by the copyright
+owner that is granting the License.
+
+"Legal Entity" shall mean the union of the acting entity and all other entities
+that control, are controlled by, or are under common control with that entity.
+For the purposes of this definition, "control" means (i) the power, direct or
+indirect, to cause the direction or management of such entity, whether by
+contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the
+outstanding shares, or (iii) beneficial ownership of such entity.
+
+"You" (or "Your") shall mean an individual or Legal Entity exercising
+permissions granted by this License.
+
+"Source" form shall mean the preferred form for making modifications, including
+but not limited to software source code, documentation source, and configuration
+files.
+
+"Object" form shall mean any form resulting from mechanical transformation or
+translation of a Source form, including but not limited to compiled object code,
+generated documentation, and conversions to other media types.
+
+"Work" shall mean the work of authorship, whether in Source or Object form, made
+available under the License, as indicated by a copyright notice that is included
+in or attached to the work (an example is provided in the Appendix below).
+
+"Derivative Works" shall mean any work, whether in Source or Object form, that
+is based on (or derived from) the Work and for which the editorial revisions,
+annotations, elaborations, or other modifications represent, as a whole, an
+original work of authorship. For the purposes of this License, Derivative Works
+shall not include works that remain separable from, or merely link (or bind by
+name) to the interfaces of, the Work and Derivative Works thereof.
+
+"Contribution" shall mean any work of authorship, including the original version
+of the Work and any modifications or additions to that Work or Derivative Works
+thereof, that is intentionally submitted to Licensor for inclusion in the Work
+by the copyright owner or by an individual or Legal Entity authorized to submit
+on behalf of the copyright owner. For the purposes of this definition,
+"submitted" means any form of electronic, verbal, or written communication sent
+to the Licensor or its representatives, including but not limited to
+communication on electronic mailing lists, source code control systems, and
+issue tracking systems that are managed by, or on behalf of, the Licensor for
+the purpose of discussing and improving the Work, but excluding communication
+that is conspicuously marked or otherwise designated in writing by the copyright
+owner as "Not a Contribution."
+
+"Contributor" shall mean Licensor and any individual or Legal Entity on behalf
+of whom a Contribution has been received by Licensor and subsequently
+incorporated within the Work.
+
+2. Grant of Copyright License.
+
+Subject to the terms and conditions of this License, each Contributor hereby
+grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
+irrevocable copyright license to reproduce, prepare Derivative Works of,
+publicly display, publicly perform, sublicense, and distribute the Work and such
+Derivative Works in Source or Object form.
+
+3. Grant of Patent License.
+
+Subject to the terms and conditions of this License, each Contributor hereby
+grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
+irrevocable (except as stated in this section) patent license to make, have
+made, use, offer to sell, sell, import, and otherwise transfer the Work, where
+such license applies only to those patent claims licensable by such Contributor
+that are necessarily infringed by their Contribution(s) alone or by combination
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+submitted. If You institute patent litigation against any entity (including a
+cross-claim or counterclaim in a lawsuit) alleging that the Work or a
+Contribution incorporated within the Work constitutes direct or contributory
+patent infringement, then any patent licenses granted to You under this License
+for that Work shall terminate as of the date such litigation is filed.
+
+4. Redistribution.
+
+You may reproduce and distribute copies of the Work or Derivative Works thereof
+in any medium, with or without modifications, and in Source or Object form,
+provided that You meet the following conditions:
+
+You must give any other recipients of the Work or Derivative Works a copy of
+this License; and
+You must cause any modified files to carry prominent notices stating that You
+changed the files; and
+You must retain, in the Source form of any Derivative Works that You distribute,
+all copyright, patent, trademark, and attribution notices from the Source form
+of the Work, excluding those notices that do not pertain to any part of the
+Derivative Works; and
+If the Work includes a "NOTICE" text file as part of its distribution, then any
+Derivative Works that You distribute must include a readable copy of the
+attribution notices contained within such NOTICE file, excluding those notices
+that do not pertain to any part of the Derivative Works, in at least one of the
+following places: within a NOTICE text file distributed as part of the
+Derivative Works; within the Source form or documentation, if provided along
+with the Derivative Works; or, within a display generated by the Derivative
+Works, if and wherever such third-party notices normally appear. The contents of
+the NOTICE file are for informational purposes only and do not modify the
+License. You may add Your own attribution notices within Derivative Works that
+You distribute, alongside or as an addendum to the NOTICE text from the Work,
+provided that such additional attribution notices cannot be construed as
+modifying the License.
+You may add Your own copyright statement to Your modifications and may provide
+additional or different license terms and conditions for use, reproduction, or
+distribution of Your modifications, or for any such Derivative Works as a whole,
+provided Your use, reproduction, and distribution of the Work otherwise complies
+with the conditions stated in this License.
+
+5. Submission of Contributions.
+
+Unless You explicitly state otherwise, any Contribution intentionally submitted
+for inclusion in the Work by You to the Licensor shall be under the terms and
+conditions of this License, without any additional terms or conditions.
+Notwithstanding the above, nothing herein shall supersede or modify the terms of
+any separate license agreement you may have executed with Licensor regarding
+such Contributions.
+
+6. Trademarks.
+
+This License does not grant permission to use the trade names, trademarks,
+service marks, or product names of the Licensor, except as required for
+reasonable and customary use in describing the origin of the Work and
+reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty.
+
+Unless required by applicable law or agreed to in writing, Licensor provides the
+Work (and each Contributor provides its Contributions) on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
+including, without limitation, any warranties or conditions of TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are
+solely responsible for determining the appropriateness of using or
+redistributing the Work and assume any risks associated with Your exercise of
+permissions under this License.
+
+8. Limitation of Liability.
+
+In no event and under no legal theory, whether in tort (including negligence),
+contract, or otherwise, unless required by applicable law (such as deliberate
+and grossly negligent acts) or agreed to in writing, shall any Contributor be
+liable to You for damages, including any direct, indirect, special, incidental,
+or consequential damages of any character arising as a result of this License or
+out of the use or inability to use the Work (including but not limited to
+damages for loss of goodwill, work stoppage, computer failure or malfunction, or
+any and all other commercial damages or losses), even if such Contributor has
+been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability.
+
+While redistributing the Work or Derivative Works thereof, You may choose to
+offer, and charge a fee for, acceptance of support, warranty, indemnity, or
+other liability obligations and/or rights consistent with this License. However,
+in accepting such obligations, You may act only on Your own behalf and on Your
+sole responsibility, not on behalf of any other Contributor, and only if You
+agree to indemnify, defend, and hold each Contributor harmless for any liability
+incurred by, or claims asserted against, such Contributor by reason of your
+accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work
+
+To apply the Apache License to your work, attach the following boilerplate
+notice, with the fields enclosed by brackets "[]" replaced with your own
+identifying information. (Don't include the brackets!) The text should be
+enclosed in the appropriate comment syntax for the file format. We also
+recommend that a file or class name and description of purpose be included on
+the same "printed page" as the copyright notice for easier identification within
+third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   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.

vendor/github.com/golang/glog/README

@@ -0,0 +1,44 @@
+glog
+====
+
+Leveled execution logs for Go.
+
+This is an efficient pure Go implementation of leveled logs in the
+manner of the open source C++ package
+	https://github.com/google/glog
+
+By binding methods to booleans it is possible to use the log package
+without paying the expense of evaluating the arguments to the log.
+Through the -vmodule flag, the package also provides fine-grained
+control over logging at the file level.
+
+The comment from glog.go introduces the ideas:
+
+	Package glog implements logging analogous to the Google-internal
+	C++ INFO/ERROR/V setup.  It provides functions Info, Warning,
+	Error, Fatal, plus formatting variants such as Infof. It
+	also provides V-style logging controlled by the -v and
+	-vmodule=file=2 flags.
+	
+	Basic examples:
+	
+		glog.Info("Prepare to repel boarders")
+	
+		glog.Fatalf("Initialization failed: %s", err)
+	
+	See the documentation for the V function for an explanation
+	of these examples:
+	
+		if glog.V(2) {
+			glog.Info("Starting transaction...")
+		}
+	
+		glog.V(2).Infoln("Processed", nItems, "elements")
+
+
+The repository contains an open source version of the log package
+used inside Google. The master copy of the source lives inside
+Google, not here. The code in this repo is for export only and is not itself
+under development. Feature requests will be ignored.
+
+Send bug reports to golang-nuts@googlegroups.com.

vendor/github.com/golang/glog/glog_file.go

@@ -0,0 +1,124 @@
+// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
+//
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// 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.
+
+// File I/O for logs.
+
+package glog
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+	"os/user"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
+)
+
+// MaxSize is the maximum size of a log file in bytes.
+var MaxSize uint64 = 1024 * 1024 * 1800
+
+// logDirs lists the candidate directories for new log files.
+var logDirs []string
+
+// If non-empty, overrides the choice of directory in which to write logs.
+// See createLogDirs for the full list of possible destinations.
+var logDir = flag.String("log_dir", "", "If non-empty, write log files in this directory")
+
+func createLogDirs() {
+	if *logDir != "" {
+		logDirs = append(logDirs, *logDir)
+	}
+	logDirs = append(logDirs, os.TempDir())
+}
+
+var (
+	pid      = os.Getpid()
+	program  = filepath.Base(os.Args[0])
+	host     = "unknownhost"
+	userName = "unknownuser"
+)
+
+func init() {
+	h, err := os.Hostname()
+	if err == nil {
+		host = shortHostname(h)
+	}
+
+	current, err := user.Current()
+	if err == nil {
+		userName = current.Username
+	}
+
+	// Sanitize userName since it may contain filepath separators on Windows.
+	userName = strings.Replace(userName, `\`, "_", -1)
+}
+
+// shortHostname returns its argument, truncating at the first period.
+// For instance, given "www.google.com" it returns "www".
+func shortHostname(hostname string) string {
+	if i := strings.Index(hostname, "."); i >= 0 {
+		return hostname[:i]
+	}
+	return hostname
+}
+
+// logName returns a new log file name containing tag, with start time t, and
+// the name for the symlink for tag.
+func logName(tag string, t time.Time) (name, link string) {
+	name = fmt.Sprintf("%s.%s.%s.log.%s.%04d%02d%02d-%02d%02d%02d.%d",
+		program,
+		host,
+		userName,
+		tag,
+		t.Year(),
+		t.Month(),
+		t.Day(),
+		t.Hour(),
+		t.Minute(),
+		t.Second(),
+		pid)
+	return name, program + "." + tag
+}
+
+var onceLogDirs sync.Once
+
+// create creates a new log file and returns the file and its filename, which
+// contains tag ("INFO", "FATAL", etc.) and t.  If the file is created
+// successfully, create also attempts to update the symlink for that tag, ignoring
+// errors.
+func create(tag string, t time.Time) (f *os.File, filename string, err error) {
+	onceLogDirs.Do(createLogDirs)
+	if len(logDirs) == 0 {
+		return nil, "", errors.New("log: no log dirs")
+	}
+	name, link := logName(tag, t)
+	var lastErr error
+	for _, dir := range logDirs {
+		fname := filepath.Join(dir, name)
+		f, err := os.Create(fname)
+		if err == nil {
+			symlink := filepath.Join(dir, link)
+			os.Remove(symlink)        // ignore err
+			os.Symlink(name, symlink) // ignore err
+			return f, fname, nil
+		}
+		lastErr = err
+	}
+	return nil, "", fmt.Errorf("log: cannot create log: %v", lastErr)
+}

vendor/modules.txt

@@ -36,6 +36,8 @@ github.com/go-logr/zapr
 # github.com/gogo/protobuf v1.3.1
 github.com/gogo/protobuf/proto
 github.com/gogo/protobuf/sortkeys
+# github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
+github.com/golang/glog
 # github.com/golang/groupcache v0.0.0-20191027212112-611e8accdfc9
 github.com/golang/groupcache/lru
 # github.com/golang/protobuf v1.4.2