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ecr.go
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ecr.go
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// Package ecr implements ECR utilities.
package ecr
import (
"encoding/json"
"errors"
"fmt"
"strings"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/endpoints"
"github.com/aws/aws-sdk-go/service/ecr"
"github.com/aws/aws-sdk-go/service/ecr/ecriface"
"github.com/dustin/go-humanize"
"go.uber.org/zap"
)
// Check checks if the specified repository exists, and returns the repository URI + ":" + image tag.
// It returns "true" for "ok" if the repository exists.
func Check(
lg *zap.Logger,
svc ecriface.ECRAPI,
partition string,
repoAccountID string,
repoRegion string,
repoName string,
imageTag string) (img string, ok bool, err error) {
// e.g. 602401143452.dkr.ecr.us-west-2.amazonaws.com/amazon-k8s-cni:v1.6.3
ecrHost := "amazonaws.com"
switch partition {
case endpoints.AwsCnPartitionID:
ecrHost = "amazonaws.com.cn"
default:
}
img = fmt.Sprintf("%s.dkr.ecr.%s.%s/%s:%s", repoAccountID, repoRegion, ecrHost, repoName, imageTag)
lg.Info("describing an ECR repository",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.String("image-tag", imageTag),
zap.String("image", img),
)
repoOut, err := svc.DescribeRepositories(&ecr.DescribeRepositoriesInput{
RegistryId: aws.String(repoAccountID),
RepositoryNames: aws.StringSlice([]string{repoName}),
})
if err != nil {
ev, ok := err.(awserr.Error)
if !ok {
return img, false, err
}
switch ev.Code() {
case "RepositoryNotFoundException":
lg.Warn("ECR repo not found", zap.String("error-code", ev.Code()), zap.Error(err))
ok = false
default:
}
return img, ok, err
}
if len(repoOut.Repositories) != 1 {
return img, true, fmt.Errorf("%q expected 1 ECR repository, got %d", repoName, len(repoOut.Repositories))
}
repo := repoOut.Repositories[0]
repoAccountID2 := aws.StringValue(repo.RegistryId)
repoARN := aws.StringValue(repo.RepositoryArn)
repoName2 := aws.StringValue(repo.RepositoryName)
repoURI := aws.StringValue(repo.RepositoryUri)
img = repoURI + ":" + imageTag
lg.Info(
"described an ECR repository",
zap.String("repo-arn", repoARN),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName2),
zap.String("repo-uri", repoURI),
zap.String("image", img),
)
if repoAccountID2 != repoAccountID {
return img, true, fmt.Errorf("unexpected ECR repository account ID %q (expected %q)", repoAccountID2, repoAccountID)
}
if repoName2 != repoName {
return img, true, fmt.Errorf("unexpected ECR repository name %q", repoName2)
}
if !strings.Contains(repoURI, repoRegion) {
return img, true, fmt.Errorf("region %q not found in URI %q", repoRegion, repoURI)
}
lg.Info("describing images",
zap.String("repo-name", repoName),
zap.String("repo-uri", repoURI),
zap.String("image-tag", imageTag),
)
imgOut, err := svc.DescribeImages(&ecr.DescribeImagesInput{
RegistryId: aws.String(repoAccountID),
RepositoryName: aws.String(repoName),
ImageIds: []*ecr.ImageIdentifier{
{
ImageTag: aws.String(imageTag),
},
},
})
if err != nil {
lg.Warn("failed to describe image", zap.Error(err))
return img, true, err
}
if len(imgOut.ImageDetails) == 0 {
return img, true, fmt.Errorf("image tag %q not found", imageTag)
}
lg.Info("described images",
zap.String("repo-name", repoName),
zap.String("image-tag", imageTag),
zap.Int("images", len(imgOut.ImageDetails)),
)
for i, img := range imgOut.ImageDetails {
lg.Info("found an image",
zap.Int("index", i),
zap.String("requested-tag", imageTag),
zap.Strings("returned-tags", aws.StringValueSlice(img.ImageTags)),
zap.String("digest", aws.StringValue(img.ImageDigest)),
zap.String("pushed-at", fmt.Sprintf("%v", aws.TimeValue(img.ImagePushedAt))),
zap.String("size", humanize.Bytes(uint64(aws.Int64Value(img.ImageSizeInBytes)))),
)
}
return img, true, nil
}
// Create creates an ECR repo if it does not exist.
// If the set policy fails, ECR repo creation is reverted (delete).
func Create(
lg *zap.Logger,
svc ecriface.ECRAPI,
repoAccountID string,
repoRegion string,
repoName string,
imgScanOnPush bool,
imgTagMutability string,
policyTxt string,
setPolicyForce bool) (repoURI string, err error) {
lg.Info("creating an ECR repository",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.Bool("image-scan-on-push", imgScanOnPush),
zap.String("image-tag-mutability", imgTagMutability),
zap.Bool("set-policy-force", setPolicyForce),
)
switch imgTagMutability {
case ecr.ImageTagMutabilityMutable:
case ecr.ImageTagMutabilityImmutable:
default:
return "", fmt.Errorf("invalid image tag mutability %q", imgTagMutability)
}
repoOut, err := svc.DescribeRepositories(&ecr.DescribeRepositoriesInput{
RegistryId: aws.String(repoAccountID),
RepositoryNames: aws.StringSlice([]string{repoName}),
})
if err == nil {
if len(repoOut.Repositories) != 1 {
return "", fmt.Errorf("%q expected 1 ECR repository, got %d", repoName, len(repoOut.Repositories))
}
repo := repoOut.Repositories[0]
repoAccountID2 := aws.StringValue(repo.RegistryId)
repoARN := aws.StringValue(repo.RepositoryArn)
repoName2 := aws.StringValue(repo.RepositoryName)
repoURI = aws.StringValue(repo.RepositoryUri)
lg.Info(
"found an ECR repository",
zap.String("repo-arn", repoARN),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName2),
zap.String("repo-uri", repoURI),
)
if repoAccountID2 != repoAccountID {
return "", fmt.Errorf("unexpected ECR repository account ID %q (expected %q)", repoAccountID2, repoAccountID)
}
if repoName2 != repoName {
return "", fmt.Errorf("unexpected ECR repository name %q", repoName2)
}
if !strings.Contains(repoURI, repoRegion) {
return "", fmt.Errorf("region %q not found in URI %q", repoRegion, repoURI)
}
return repoURI, nil
}
ev, ok := err.(awserr.Error)
if !ok {
return "", err
}
if ev.Code() != "RepositoryNotFoundException" {
return "", err
}
lg.Info("ECR repo not found; creating a new one", zap.String("error-code", ev.Code()), zap.Error(err))
var createOutput *ecr.CreateRepositoryOutput
createOutput, err = svc.CreateRepository(&ecr.CreateRepositoryInput{
ImageScanningConfiguration: &ecr.ImageScanningConfiguration{
ScanOnPush: aws.Bool(imgScanOnPush),
},
ImageTagMutability: aws.String(imgTagMutability),
RepositoryName: aws.String(repoName),
Tags: []*ecr.Tag{
{Key: aws.String("Kind"), Value: aws.String("aws-k8s-tester")},
},
})
if err != nil {
return "", err
}
repo := createOutput.Repository
repoAccountID2 := aws.StringValue(repo.RegistryId)
repoARN := aws.StringValue(repo.RepositoryArn)
repoName2 := aws.StringValue(repo.RepositoryName)
repoURI = aws.StringValue(repo.RepositoryUri)
lg.Info(
"created an ECR repository",
zap.String("repo-arn", repoARN),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName2),
zap.String("repo-uri", repoURI),
)
if repoAccountID2 != repoAccountID {
return "", fmt.Errorf("unexpected ECR repository account ID %q (expected %q)", repoAccountID2, repoAccountID)
}
if repoName2 != repoName {
return "", fmt.Errorf("unexpected ECR repository name %q", repoName2)
}
if !strings.Contains(repoURI, repoRegion) {
return "", fmt.Errorf("region %q not found in URI %q", repoRegion, repoURI)
}
if policyTxt != "" {
if _, jerr := json.Marshal(policyTxt); jerr != nil {
return "", fmt.Errorf("failed to marshal %v", jerr)
}
_, serr := svc.SetRepositoryPolicy(&ecr.SetRepositoryPolicyInput{
RegistryId: aws.String(repoAccountID),
RepositoryName: aws.String(repoName),
Force: aws.Bool(setPolicyForce),
PolicyText: aws.String(policyTxt),
})
if serr != nil {
lg.Warn("failed to set repository policy, reverting ECR repository creation", zap.Error(serr))
if derr := Delete(lg, svc, repoAccountID, repoRegion, repoName, false); derr != nil {
lg.Warn("failed to revert ECR repository creation", zap.Error(derr))
}
return "", fmt.Errorf("failed to set repostiory policy for %q (%v)", repoURI, serr)
}
}
return repoURI, nil
}
// Delete deletes an ECR repo if it exists.
func Delete(
lg *zap.Logger,
svc ecriface.ECRAPI,
repoAccountID string,
repoRegion string,
repoName string,
force bool) (err error) {
lg.Info("deleting an ECR repository",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.Bool("force", force),
)
repoOut, err := svc.DescribeRepositories(&ecr.DescribeRepositoriesInput{
RegistryId: aws.String(repoAccountID),
RepositoryNames: aws.StringSlice([]string{repoName}),
})
if err != nil {
ev, ok := err.(awserr.Error)
if ok && ev.Code() == "RepositoryNotFoundException" {
lg.Info("ECR repository already deleted; skipping",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.Error(err),
)
return nil
}
return err
}
if len(repoOut.Repositories) != 1 {
return fmt.Errorf("%q expected 1 ECR repository, got %d", repoName, len(repoOut.Repositories))
}
repo := repoOut.Repositories[0]
repoAccountID2 := aws.StringValue(repo.RegistryId)
repoARN := aws.StringValue(repo.RepositoryArn)
repoName2 := aws.StringValue(repo.RepositoryName)
repoURI := aws.StringValue(repo.RepositoryUri)
lg.Info(
"found an ECR repository; deleting",
zap.String("repo-arn", repoARN),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName2),
zap.String("repo-uri", repoURI),
)
if repoAccountID2 != repoAccountID {
return fmt.Errorf("unexpected ECR repository account ID %q (expected %q)", repoAccountID2, repoAccountID)
}
if repoName2 != repoName {
return fmt.Errorf("unexpected ECR repository name %q", repoName2)
}
if !strings.Contains(repoURI, repoRegion) {
return fmt.Errorf("region %q not found in URI %q", repoRegion, repoURI)
}
_, err = svc.DeleteRepository(&ecr.DeleteRepositoryInput{
RegistryId: aws.String(repoAccountID),
RepositoryName: aws.String(repoName),
Force: aws.Bool(force),
})
if err != nil {
lg.Warn("failed to delete an ECR repository", zap.Error(err))
return err
}
// confirm ECR deletion
deleted := false
retryStart := time.Now()
for time.Since(retryStart) < 15*time.Minute {
time.Sleep(5 * time.Second)
_, derr := svc.DescribeRepositories(&ecr.DescribeRepositoriesInput{
RegistryId: aws.String(repoAccountID),
RepositoryNames: aws.StringSlice([]string{repoName}),
})
if derr != nil {
ev, ok := derr.(awserr.Error)
if ok && ev.Code() == "RepositoryNotFoundException" {
lg.Info("confirmed ECR repository has been deleted",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.Error(derr),
)
deleted = true
}
if !deleted {
lg.Warn("failed to describe an ECR repository", zap.Error(derr))
}
}
if deleted {
break
}
}
if !deleted {
return fmt.Errorf("ECR %q has not been deleted", repoName)
}
lg.Info("deleted an ECR repository",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.String("repo-uri", repoURI),
zap.Bool("force", force),
)
return nil
}
// SetPolicy updates the policy for an ECR repo.
func SetPolicy(
lg *zap.Logger,
svc ecriface.ECRAPI,
repoAccountID string,
repoRegion string,
repoName string,
policyTxt string,
setPolicyForce bool) (repoURI string, err error) {
if len(policyTxt) == 0 {
return "", errors.New("empty policy")
}
lg.Info("setting policy for an ECR repository",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.Bool("set-policy-force", setPolicyForce),
)
repoOut, err := svc.DescribeRepositories(&ecr.DescribeRepositoriesInput{
RegistryId: aws.String(repoAccountID),
RepositoryNames: aws.StringSlice([]string{repoName}),
})
if err != nil {
ev, ok := err.(awserr.Error)
if !ok {
return "", err
}
if ev.Code() == "RepositoryNotFoundException" {
lg.Warn("repository not found", zap.Error(err))
}
return "", err
}
if len(repoOut.Repositories) != 1 {
return "", fmt.Errorf("%q expected 1 ECR repository, got %d", repoName, len(repoOut.Repositories))
}
repo := repoOut.Repositories[0]
repoAccountID2 := aws.StringValue(repo.RegistryId)
repoARN := aws.StringValue(repo.RepositoryArn)
repoName2 := aws.StringValue(repo.RepositoryName)
repoURI = aws.StringValue(repo.RepositoryUri)
lg.Info(
"found an ECR repository",
zap.String("repo-arn", repoARN),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName2),
zap.String("repo-uri", repoURI),
)
if repoAccountID2 != repoAccountID {
return "", fmt.Errorf("unexpected ECR repository account ID %q (expected %q)", repoAccountID2, repoAccountID)
}
if repoName2 != repoName {
return "", fmt.Errorf("unexpected ECR repository name %q", repoName2)
}
if !strings.Contains(repoURI, repoRegion) {
return "", fmt.Errorf("region %q not found in URI %q", repoRegion, repoURI)
}
if _, jerr := json.Marshal(policyTxt); jerr != nil {
return "", fmt.Errorf("failed to marshal %v", jerr)
}
_, serr := svc.SetRepositoryPolicy(&ecr.SetRepositoryPolicyInput{
RegistryId: aws.String(repoAccountID),
RepositoryName: aws.String(repoName),
Force: aws.Bool(setPolicyForce),
PolicyText: aws.String(policyTxt),
})
if serr != nil {
lg.Warn("failed to set repository policy", zap.Error(serr))
return "", fmt.Errorf("failed to set repostiory policy for %q (%v)", repoURI, serr)
}
lg.Info("set policy for an ECR repository",
zap.String("repo-account-id", repoAccountID),
zap.String("repo-region", repoRegion),
zap.String("repo-name", repoName),
zap.String("repo-uri", repoURI),
zap.Bool("set-policy-force", setPolicyForce),
)
return repoURI, nil
}
// TODO: get auth token
// https://github.com/aws/amazon-ecs-agent/blob/master/agent/dockerclient/dockerauth/ecr.go
// automated docker push