Merge pull request #1143 from upmc-enterprises/registryCredsPrompt

Allow for addons to prompt for data input

cmd/minikube/cmd/config/prompt.go

+/*
+Copyright 2016 The Kubernetes Authors 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.
+*/
+
+package config
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+)
+
+// AskForYesNoConfirmation asks the user for confirmation. A user must type in "yes" or "no" and
+// then press enter. It has fuzzy matching, so "y", "Y", "yes", "YES", and "Yes" all count as
+// confirmations. If the input is not recognized, it will ask again. The function does not return
+// until it gets a valid response from the user.
+func AskForYesNoConfirmation(s string, posResponses, negResponses []string) bool {
+	reader := bufio.NewReader(os.Stdin)
+
+	for {
+		fmt.Printf("%s [y/n]: ", s)
+
+		response, err := reader.ReadString('\n')
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		response = strings.ToLower(strings.TrimSpace(response))
+
+		if containsString(posResponses, response) {
+			return true
+		} else if containsString(negResponses, response) {
+			return false
+		} else {
+			fmt.Println("Please type yes or no:")
+			return AskForYesNoConfirmation(s, posResponses, negResponses)
+		}
+	}
+}
+
+// AskForStaticValue asks for a single value to enter
+func AskForStaticValue(s string) string {
+	reader := bufio.NewReader(os.Stdin)
+
+	for {
+		fmt.Printf("%s", s)
+
+		response, err := reader.ReadString('\n')
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		response = strings.TrimSpace(response)
+
+		// Can't have zero length
+		if len(response) == 0 {
+			fmt.Println("--Error, please enter a value:")
+			return AskForStaticValue(s)
+		}
+		return response
+	}
+}
+
+// posString returns the first index of element in slice.
+// If slice does not contain element, returns -1.
+func posString(slice []string, element string) int {
+	for index, elem := range slice {
+		if elem == element {
+			return index
+		}
+	}
+	return -1
+}
+
+// containsString returns true iff slice contains element
+func containsString(slice []string, element string) bool {
+	return !(posString(slice, element) == -1)
+}

cmd/minikube/cmd/config/util.go

@@ -18,6 +18,7 @@ package config
 
 import (
 	"fmt"
+	"io/ioutil"
 	"os"
 	"strconv"
 
@@ -28,6 +29,7 @@ import (
 	"k8s.io/minikube/pkg/minikube/cluster"
 	"k8s.io/minikube/pkg/minikube/config"
 	"k8s.io/minikube/pkg/minikube/machine"
+	"k8s.io/minikube/pkg/minikube/service"
 	"k8s.io/minikube/pkg/minikube/sshutil"
 )
 
@@ -88,11 +90,93 @@ func GetClientType() machine.ClientType {
 }
 
 func EnableOrDisableAddon(name string, val string) error {
+
 	enable, err := strconv.ParseBool(val)
 	if err != nil {
 		errors.Wrapf(err, "error attempted to parse enabled/disable value addon %s", name)
 	}
 
+	// allows for additional prompting of information when enabling addons
+	if enable {
+		switch name {
+		case "registry-creds":
+			posResponses := []string{"yes", "y"}
+			negResponses := []string{"no", "n"}
+
+			// Default values
+			awsAccessID := "changeme"
+			awsAccessKey := "changeme"
+			awsRegion := "changeme"
+			awsAccount := "changeme"
+			gcrApplicationDefaultCredentials := "changeme"
+
+			enableAWSECR := AskForYesNoConfirmation("\nDo you want to enable AWS Elastic Container Registry?", posResponses, negResponses)
+			if enableAWSECR {
+				awsAccessID = AskForStaticValue("-- Enter AWS Access Key ID: ")
+				awsAccessKey = AskForStaticValue("-- Enter AWS Secret Access Key: ")
+				awsRegion = AskForStaticValue("-- Enter AWS Region: ")
+				awsAccount = AskForStaticValue("-- Enter 12 digit AWS Account ID: ")
+			}
+
+			enableGCR := AskForYesNoConfirmation("\nDo you want to enable Google Container Registry?", posResponses, negResponses)
+			if enableGCR {
+				gcrPath := AskForStaticValue("-- Enter path to credentials (e.g. /home/user/.config/gcloud/application_default_credentials.json):")
+
+				// Read file from disk
+				dat, err := ioutil.ReadFile(gcrPath)
+
+				if err != nil {
+					fmt.Println("Could not read file for application_default_credentials.json")
+				} else {
+					gcrApplicationDefaultCredentials = string(dat)
+				}
+			}
+
+			// Create ECR Secret
+			err = service.CreateSecret(
+				"kube-system",
+				"registry-creds-ecr",
+				map[string]string{
+					"AWS_ACCESS_KEY_ID":     awsAccessID,
+					"AWS_SECRET_ACCESS_KEY": awsAccessKey,
+					"aws-account":           awsAccount,
+					"aws-region":            awsRegion,
+				},
+				map[string]string{
+					"app":   "registry-creds",
+					"cloud": "ecr",
+					"kubernetes.io/minikube-addons": "registry-creds",
+				})
+
+			if err != nil {
+				fmt.Println("ERROR creating `registry-creds-ecr` secret")
+			}
+
+			// Create GCR Secret
+			err = service.CreateSecret(
+				"kube-system",
+				"registry-creds-gcr",
+				map[string]string{
+					"application_default_credentials.json": gcrApplicationDefaultCredentials,
+				},
+				map[string]string{
+					"app":   "registry-creds",
+					"cloud": "gcr",
+					"kubernetes.io/minikube-addons": "registry-creds",
+				})
+
+			if err != nil {
+				fmt.Println("ERROR creating `registry-creds-gcr` secret")
+			}
+
+			break
+		}
+	} else {
+		// Cleanup existing secrets
+		service.DeleteSecret("kube-system", "registry-creds-ecr")
+		service.DeleteSecret("kube-system", "registry-creds-gcr")
+	}
+
 	//TODO(r2d4): config package should not reference API, pull this out
 	api, err := machine.NewAPIClient(GetClientType())
 	if err != nil {

deploy/addons/registry-creds/registry-creds-rc.yaml

-
 apiVersion: v1
 kind: ReplicationController
 metadata:
   name: registry-creds
   namespace: kube-system
   labels:
-    app: registry-creds
-    version: v1.5
+    version: v1.6
     kubernetes.io/cluster-service: "true"
     kubernetes.io/minikube-addons: registry-creds
 spec:
   replicas: 1
   selector:
-    app: registry-creds
-    version: v1.5
+    name: registry-creds
+    version: v1.6
     kubernetes.io/cluster-service: "true"
   template:
     metadata:
       labels:
-        app: registry-creds
-        version: v1.5
+        name: registry-creds
+        version: v1.6
         kubernetes.io/cluster-service: "true"
     spec:
       containers:
-      - image: upmcenterprises/registry-creds:1.5
+      - image: upmcenterprises/registry-creds:1.6
         name: registry-creds
         imagePullPolicy: Always
         env:
           - name: AWS_ACCESS_KEY_ID
             valueFrom:
               secretKeyRef:
-                name: registry-creds
+                name: registry-creds-ecr
                 key: AWS_ACCESS_KEY_ID
           - name: AWS_SECRET_ACCESS_KEY
             valueFrom:
               secretKeyRef:
-                name: registry-creds
+                name: registry-creds-ecr
                 key: AWS_SECRET_ACCESS_KEY
           - name: awsaccount
             valueFrom:
               secretKeyRef:
-                name: registry-creds
+                name: registry-creds-ecr
                 key: aws-account
+          - name: awsregion
+            valueFrom:
+              secretKeyRef:
+                name: registry-creds-ecr
+                key: aws-region
         volumeMounts:
         - name: gcr-creds
           mountPath: "/root/.config/gcloud"
@@ -49,4 +52,4 @@ spec:
       volumes:
       - name: gcr-creds
         secret:
-          secretName: gcr-secret
+          secretName: registry-creds-gcr
\ No newline at end of file

pkg/minikube/service/service.go

@@ -261,3 +261,69 @@ func getServiceListFromServicesByLabel(services corev1.ServiceInterface, key str
 
 	return serviceList, nil
 }
+
+// CreateSecret creates or modifies secrets
+func CreateSecret(namespace, name string, dataValues map[string]string, labels map[string]string) error {
+	client, err := k8s.GetCoreClient()
+	if err != nil {
+		return &util.RetriableError{Err: err}
+	}
+	secrets := client.Secrets(namespace)
+	if err != nil {
+		return &util.RetriableError{Err: err}
+	}
+
+	secret, _ := secrets.Get(name)
+
+	// Delete existing secret
+	if len(secret.Name) > 0 {
+		err = DeleteSecret(namespace, name)
+		if err != nil {
+			return &util.RetriableError{Err: err}
+		}
+	}
+
+	// convert strings to data secrets
+	data := map[string][]byte{}
+	for key, value := range dataValues {
+		data[key] = []byte(value)
+	}
+
+	// Create Secret
+	secretObj := &v1.Secret{
+		ObjectMeta: v1.ObjectMeta{
+			Name:   name,
+			Labels: labels,
+		},
+		Data: data,
+		Type: v1.SecretTypeOpaque,
+	}
+
+	_, err = secrets.Create(secretObj)
+	if err != nil {
+		fmt.Println("err: ", err)
+		return &util.RetriableError{Err: err}
+	}
+
+	return nil
+}
+
+// DeleteSecret deletes a secret from a namespace
+func DeleteSecret(namespace, name string) error {
+	client, err := k8s.GetCoreClient()
+	if err != nil {
+		return &util.RetriableError{Err: err}
+	}
+
+	secrets := client.Secrets(namespace)
+	if err != nil {
+		return &util.RetriableError{Err: err}
+	}
+
+	err = secrets.Delete(name, &kubeapi.DeleteOptions{})
+	if err != nil {
+		return &util.RetriableError{Err: err}
+	}
+
+	return nil
+}