Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/pkg/credentialprovider/aws/aws_credentials.go

@@ -0,0 +1,233 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package credentials
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ecr"
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/credentialprovider"
+)
+
+// AWSRegions is the complete list of regions known to the AWS cloudprovider
+// and credentialprovider.
+var AWSRegions = [...]string{
+	"us-east-1",
+	"us-east-2",
+	"us-west-1",
+	"us-west-2",
+	"eu-west-1",
+	"eu-central-1",
+	"ap-south-1",
+	"ap-southeast-1",
+	"ap-southeast-2",
+	"ap-northeast-1",
+	"ap-northeast-2",
+	"cn-north-1",
+	"us-gov-west-1",
+	"sa-east-1",
+}
+
+const registryURLTemplate = "*.dkr.ecr.%s.amazonaws.com"
+
+// awsHandlerLogger is a handler that logs all AWS SDK requests
+// Copied from pkg/cloudprovider/providers/aws/log_handler.go
+func awsHandlerLogger(req *request.Request) {
+	service := req.ClientInfo.ServiceName
+	region := req.Config.Region
+
+	name := "?"
+	if req.Operation != nil {
+		name = req.Operation.Name
+	}
+
+	glog.V(3).Infof("AWS request: %s:%s in %s", service, name, *region)
+}
+
+// An interface for testing purposes.
+type tokenGetter interface {
+	GetAuthorizationToken(input *ecr.GetAuthorizationTokenInput) (*ecr.GetAuthorizationTokenOutput, error)
+}
+
+// The canonical implementation
+type ecrTokenGetter struct {
+	svc *ecr.ECR
+}
+
+func (p *ecrTokenGetter) GetAuthorizationToken(input *ecr.GetAuthorizationTokenInput) (*ecr.GetAuthorizationTokenOutput, error) {
+	return p.svc.GetAuthorizationToken(input)
+}
+
+// lazyEcrProvider is a DockerConfigProvider that creates on demand an
+// ecrProvider for a given region and then proxies requests to it.
+type lazyEcrProvider struct {
+	region         string
+	regionURL      string
+	actualProvider *credentialprovider.CachingDockerConfigProvider
+}
+
+var _ credentialprovider.DockerConfigProvider = &lazyEcrProvider{}
+
+// ecrProvider is a DockerConfigProvider that gets and refreshes 12-hour tokens
+// from AWS to access ECR.
+type ecrProvider struct {
+	region    string
+	regionURL string
+	getter    tokenGetter
+}
+
+var _ credentialprovider.DockerConfigProvider = &ecrProvider{}
+
+// Init creates a lazy provider for each AWS region, in order to support
+// cross-region ECR access. They have to be lazy because it's unlikely, but not
+// impossible, that we'll use more than one.
+// Not using the package init() function: this module should be initialized only
+// if using the AWS cloud provider. This way, we avoid timeouts waiting for a
+// non-existent provider.
+func Init() {
+	for _, region := range AWSRegions {
+		credentialprovider.RegisterCredentialProvider("aws-ecr-"+region,
+			&lazyEcrProvider{
+				region:    region,
+				regionURL: fmt.Sprintf(registryURLTemplate, region),
+			})
+	}
+
+}
+
+// Enabled implements DockerConfigProvider.Enabled for the lazy provider.
+// Since we perform no checks/work of our own and actualProvider is only created
+// later at image pulling time (if ever), always return true.
+func (p *lazyEcrProvider) Enabled() bool {
+	return true
+}
+
+// LazyProvide implements DockerConfigProvider.LazyProvide. It will be called
+// by the client when attempting to pull an image and it will create the actual
+// provider only when we actually need it the first time.
+func (p *lazyEcrProvider) LazyProvide() *credentialprovider.DockerConfigEntry {
+	if p.actualProvider == nil {
+		glog.V(2).Infof("Creating ecrProvider for %s", p.region)
+		p.actualProvider = &credentialprovider.CachingDockerConfigProvider{
+			Provider: newEcrProvider(p.region, nil),
+			// Refresh credentials a little earlier than expiration time
+			Lifetime: 11*time.Hour + 55*time.Minute,
+		}
+		if !p.actualProvider.Enabled() {
+			return nil
+		}
+	}
+	entry := p.actualProvider.Provide()[p.regionURL]
+	return &entry
+}
+
+// Provide implements DockerConfigProvider.Provide, creating dummy credentials.
+// Client code will call Provider.LazyProvide() at image pulling time.
+func (p *lazyEcrProvider) Provide() credentialprovider.DockerConfig {
+	entry := credentialprovider.DockerConfigEntry{
+		Provider: p,
+	}
+	cfg := credentialprovider.DockerConfig{}
+	cfg[p.regionURL] = entry
+	return cfg
+}
+
+func newEcrProvider(region string, getter tokenGetter) *ecrProvider {
+	return &ecrProvider{
+		region:    region,
+		regionURL: fmt.Sprintf(registryURLTemplate, region),
+		getter:    getter,
+	}
+}
+
+// Enabled implements DockerConfigProvider.Enabled for the AWS token-based implementation.
+// For now, it gets activated only if AWS was chosen as the cloud provider.
+// TODO: figure how to enable it manually for deployments that are not on AWS but still
+// use ECR somehow?
+func (p *ecrProvider) Enabled() bool {
+	if p.region == "" {
+		glog.Errorf("Called ecrProvider.Enabled() with no region set")
+		return false
+	}
+
+	getter := &ecrTokenGetter{svc: ecr.New(session.New(&aws.Config{
+		Credentials: nil,
+		Region:      &p.region,
+	}))}
+	getter.svc.Handlers.Sign.PushFrontNamed(request.NamedHandler{
+		Name: "k8s/logger",
+		Fn:   awsHandlerLogger,
+	})
+	p.getter = getter
+
+	return true
+}
+
+// LazyProvide implements DockerConfigProvider.LazyProvide. Should never be called.
+func (p *ecrProvider) LazyProvide() *credentialprovider.DockerConfigEntry {
+	return nil
+}
+
+// Provide implements DockerConfigProvider.Provide, refreshing ECR tokens on demand
+func (p *ecrProvider) Provide() credentialprovider.DockerConfig {
+	cfg := credentialprovider.DockerConfig{}
+
+	// TODO: fill in RegistryIds?
+	params := &ecr.GetAuthorizationTokenInput{}
+	output, err := p.getter.GetAuthorizationToken(params)
+	if err != nil {
+		glog.Errorf("while requesting ECR authorization token %v", err)
+		return cfg
+	}
+	if output == nil {
+		glog.Errorf("Got back no ECR token")
+		return cfg
+	}
+
+	for _, data := range output.AuthorizationData {
+		if data.ProxyEndpoint != nil &&
+			data.AuthorizationToken != nil {
+			decodedToken, err := base64.StdEncoding.DecodeString(aws.StringValue(data.AuthorizationToken))
+			if err != nil {
+				glog.Errorf("while decoding token for endpoint %v %v", data.ProxyEndpoint, err)
+				return cfg
+			}
+			parts := strings.SplitN(string(decodedToken), ":", 2)
+			user := parts[0]
+			password := parts[1]
+			entry := credentialprovider.DockerConfigEntry{
+				Username: user,
+				Password: password,
+				// ECR doesn't care and Docker is about to obsolete it
+				Email: "not@val.id",
+			}
+
+			glog.V(3).Infof("Adding credentials for user %s in %s", user, p.region)
+			// Add our config entry for this region's registry URLs
+			cfg[p.regionURL] = entry
+
+		}
+	}
+	return cfg
+}