mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-10-01 01:36:09 -04:00
604 lines
20 KiB
Go
604 lines
20 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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// package aws implements uploading os images to aws.
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package aws
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"time"
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awsconfig "github.com/aws/aws-sdk-go-v2/config"
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s3manager "github.com/aws/aws-sdk-go-v2/feature/s3/manager"
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"github.com/aws/aws-sdk-go-v2/service/ec2"
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ec2types "github.com/aws/aws-sdk-go-v2/service/ec2/types"
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"github.com/aws/aws-sdk-go-v2/service/s3"
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"github.com/aws/aws-sdk-go-v2/service/s3/types"
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s3types "github.com/aws/aws-sdk-go-v2/service/s3/types"
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"github.com/aws/smithy-go"
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"github.com/edgelesssys/constellation/v2/internal/api/versionsapi"
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"github.com/edgelesssys/constellation/v2/internal/logger"
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"github.com/edgelesssys/constellation/v2/internal/osimage"
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"github.com/edgelesssys/constellation/v2/internal/osimage/secureboot"
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)
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// Uploader can upload and remove os images on GCP.
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type Uploader struct {
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region string
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bucketName string
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ec2 func(ctx context.Context, region string) (ec2API, error)
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s3 func(ctx context.Context, region string) (s3API, error)
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s3uploader func(ctx context.Context, region string) (s3UploaderAPI, error)
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log *logger.Logger
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}
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// New creates a new Uploader.
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func New(region, bucketName string, log *logger.Logger) (*Uploader, error) {
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return &Uploader{
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region: region,
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bucketName: bucketName,
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ec2: func(ctx context.Context, region string) (ec2API, error) {
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cfg, err := awsconfig.LoadDefaultConfig(ctx, awsconfig.WithRegion(region))
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if err != nil {
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return nil, err
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}
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return ec2.NewFromConfig(cfg), nil
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},
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s3: func(ctx context.Context, region string) (s3API, error) {
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cfg, err := awsconfig.LoadDefaultConfig(ctx, awsconfig.WithRegion(region))
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if err != nil {
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return nil, err
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}
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return s3.NewFromConfig(cfg), nil
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},
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s3uploader: func(ctx context.Context, region string) (s3UploaderAPI, error) {
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cfg, err := awsconfig.LoadDefaultConfig(ctx, awsconfig.WithRegion(region))
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if err != nil {
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return nil, err
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}
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return s3manager.NewUploader(s3.NewFromConfig(cfg)), nil
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},
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log: log,
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}, nil
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}
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// Upload uploads an OS image to AWS.
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func (u *Uploader) Upload(ctx context.Context, req *osimage.UploadRequest) ([]versionsapi.ImageInfoEntry, error) {
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blobName := fmt.Sprintf("image-%s-%s-%d.raw", req.Version.Stream(), req.Version.Version(), req.Timestamp.Unix())
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imageName := imageName(req.Version, req.AttestationVariant, req.Timestamp)
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allRegions := []string{u.region}
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allRegions = append(allRegions, replicationRegions...)
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// TODO(malt3): make this configurable
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publish := true
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amiIDs := make(map[string]string, len(allRegions))
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if err := u.ensureBucket(ctx); err != nil {
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return nil, fmt.Errorf("ensuring bucket %s exists: %w", u.bucketName, err)
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}
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// pre-cleaning
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for _, region := range allRegions {
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if err := u.ensureImageDeleted(ctx, imageName, region); err != nil {
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return nil, fmt.Errorf("pre-cleaning: ensuring no image under the name %s in region %s: %w", imageName, region, err)
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}
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}
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if err := u.ensureSnapshotDeleted(ctx, imageName, u.region); err != nil {
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return nil, fmt.Errorf("pre-cleaning: ensuring no snapshot using the same name exists: %w", err)
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}
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if err := u.ensureBlobDeleted(ctx, blobName); err != nil {
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return nil, fmt.Errorf("pre-cleaning: ensuring no blob using the same name exists: %w", err)
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}
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// create primary image
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if err := u.uploadBlob(ctx, blobName, req.Image); err != nil {
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return nil, fmt.Errorf("uploading image to s3: %w", err)
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}
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defer func() {
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if err := u.ensureBlobDeleted(ctx, blobName); err != nil {
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u.log.Errorf("post-cleaning: deleting temporary blob from s3", err)
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}
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}()
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snapshotID, err := u.importSnapshot(ctx, blobName, imageName)
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if err != nil {
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return nil, fmt.Errorf("importing snapshot: %w", err)
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}
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primaryAMIID, err := u.createImageFromSnapshot(ctx, req.Version, imageName, snapshotID, req.SecureBoot, req.UEFIVarStore)
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if err != nil {
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return nil, fmt.Errorf("creating image from snapshot: %w", err)
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}
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amiIDs[u.region] = primaryAMIID
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if err := u.waitForImage(ctx, primaryAMIID, u.region); err != nil {
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return nil, fmt.Errorf("waiting for primary image to become available: %w", err)
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}
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// replicate image
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for _, region := range replicationRegions {
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amiID, err := u.replicateImage(ctx, imageName, primaryAMIID, region)
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if err != nil {
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return nil, fmt.Errorf("replicating image to region %s: %w", region, err)
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}
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amiIDs[region] = amiID
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}
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// wait for replication, tag, publish
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var imageInfo []versionsapi.ImageInfoEntry
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for _, region := range allRegions {
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if err := u.waitForImage(ctx, amiIDs[region], region); err != nil {
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return nil, fmt.Errorf("waiting for image to become available in region %s: %w", region, err)
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}
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if err := u.tagImageAndSnapshot(ctx, imageName, amiIDs[region], region); err != nil {
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return nil, fmt.Errorf("tagging image in region %s: %w", region, err)
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}
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if !publish {
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continue
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}
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if err := u.publishImage(ctx, amiIDs[region], region); err != nil {
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return nil, fmt.Errorf("publishing image in region %s: %w", region, err)
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}
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imageInfo = append(imageInfo, versionsapi.ImageInfoEntry{
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CSP: "aws",
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AttestationVariant: req.AttestationVariant,
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Reference: amiIDs[region],
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Region: region,
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})
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}
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return imageInfo, nil
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}
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func (u *Uploader) ensureBucket(ctx context.Context) error {
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s3C, err := u.s3(ctx, u.region)
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if err != nil {
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return fmt.Errorf("determining if bucket %s exists: %w", u.bucketName, err)
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}
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_, err = s3C.HeadBucket(ctx, &s3.HeadBucketInput{
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Bucket: &u.bucketName,
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})
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if err == nil {
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u.log.Debugf("Bucket %s exists", u.bucketName)
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return nil
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}
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var noSuchBucketErr *types.NoSuchBucket
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if !errors.As(err, &noSuchBucketErr) {
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return fmt.Errorf("determining if bucket %s exists: %w", u.bucketName, err)
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}
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u.log.Debugf("Creating bucket %s", u.bucketName)
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_, err = s3C.CreateBucket(ctx, &s3.CreateBucketInput{
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Bucket: &u.bucketName,
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})
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if err != nil {
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return fmt.Errorf("creating bucket %s: %w", u.bucketName, err)
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}
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return nil
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}
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func (u *Uploader) uploadBlob(ctx context.Context, blobName string, img io.Reader) error {
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u.log.Debugf("Uploading os image as %s", blobName)
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uploadC, err := u.s3uploader(ctx, u.region)
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if err != nil {
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return err
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}
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_, err = uploadC.Upload(ctx, &s3.PutObjectInput{
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Bucket: &u.bucketName,
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Key: &blobName,
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Body: img,
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ChecksumAlgorithm: s3types.ChecksumAlgorithmSha256,
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})
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return err
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}
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func (u *Uploader) ensureBlobDeleted(ctx context.Context, blobName string) error {
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s3C, err := u.s3(ctx, u.region)
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if err != nil {
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return err
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}
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_, err = s3C.HeadObject(ctx, &s3.HeadObjectInput{
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Bucket: &u.bucketName,
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Key: &blobName,
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})
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var apiError smithy.APIError
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if errors.As(err, &apiError) && apiError.ErrorCode() == "NotFound" {
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u.log.Debugf("Blob %s in %s doesn't exist. Nothing to clean up.", blobName, u.bucketName)
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return nil
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}
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if err != nil {
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return err
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}
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u.log.Debugf("Deleting blob %s", blobName)
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_, err = s3C.DeleteObject(ctx, &s3.DeleteObjectInput{
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Bucket: &u.bucketName,
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Key: &blobName,
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})
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return err
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}
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func (u *Uploader) findSnapshots(ctx context.Context, snapshotName, region string) ([]string, error) {
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return nil, fmt.Errorf("creating ec2 client: %w", err)
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}
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snapshots, err := ec2C.DescribeSnapshots(ctx, &ec2.DescribeSnapshotsInput{
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Filters: []ec2types.Filter{
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{
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Name: toPtr("tag:Name"),
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Values: []string{snapshotName},
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},
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},
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})
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if err != nil {
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return nil, fmt.Errorf("describing snapshots: %w", err)
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}
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var snapshotIDs []string
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for _, s := range snapshots.Snapshots {
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if s.SnapshotId == nil {
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continue
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}
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snapshotIDs = append(snapshotIDs, *s.SnapshotId)
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}
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return snapshotIDs, nil
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}
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func (u *Uploader) importSnapshot(ctx context.Context, blobName, snapshotName string) (string, error) {
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u.log.Debugf("Importing %s as snapshot %s", blobName, snapshotName)
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ec2C, err := u.ec2(ctx, u.region)
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if err != nil {
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return "", fmt.Errorf("creating ec2 client: %w", err)
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}
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importResp, err := ec2C.ImportSnapshot(ctx, &ec2.ImportSnapshotInput{
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ClientData: &ec2types.ClientData{
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Comment: &snapshotName,
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},
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Description: &snapshotName,
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DiskContainer: &ec2types.SnapshotDiskContainer{
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Description: &snapshotName,
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Format: toPtr(string(ec2types.DiskImageFormatRaw)),
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UserBucket: &ec2types.UserBucket{
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S3Bucket: &u.bucketName,
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S3Key: &blobName,
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},
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},
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})
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if err != nil {
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return "", fmt.Errorf("importing snapshot: %w", err)
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}
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if importResp.ImportTaskId == nil {
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return "", fmt.Errorf("importing snapshot: no import task ID returned")
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}
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u.log.Debugf("Waiting for snapshot %s to be ready", snapshotName)
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return waitForSnapshotImport(ctx, ec2C, *importResp.ImportTaskId)
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}
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func (u *Uploader) ensureSnapshotDeleted(ctx context.Context, snapshotName, region string) error {
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return fmt.Errorf("creating ec2 client: %w", err)
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}
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snapshots, err := u.findSnapshots(ctx, snapshotName, region)
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if err != nil {
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return fmt.Errorf("finding snapshots: %w", err)
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}
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for _, snapshot := range snapshots {
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u.log.Debugf("Deleting snapshot %s in %s", snapshot, region)
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_, err = ec2C.DeleteSnapshot(ctx, &ec2.DeleteSnapshotInput{
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SnapshotId: toPtr(snapshot),
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})
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if err != nil {
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return fmt.Errorf("deleting snapshot %s: %w", snapshot, err)
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}
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}
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return nil
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}
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func (u *Uploader) createImageFromSnapshot(ctx context.Context, version versionsapi.Version, imageName, snapshotID string, enableSecureBoot bool, uefiVarStore secureboot.UEFIVarStore) (string, error) {
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u.log.Debugf("Creating image %s in %s", imageName, u.region)
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ec2C, err := u.ec2(ctx, u.region)
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if err != nil {
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return "", fmt.Errorf("creating ec2 client: %w", err)
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}
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var uefiData *string
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if enableSecureBoot {
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awsUEFIData, err := uefiVarStore.ToAWS()
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if err != nil {
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return "", fmt.Errorf("creating uefi data: %w", err)
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}
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uefiData = toPtr(awsUEFIData)
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}
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createReq, err := ec2C.RegisterImage(ctx, &ec2.RegisterImageInput{
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Name: &imageName,
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Architecture: ec2types.ArchitectureValuesX8664,
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BlockDeviceMappings: []ec2types.BlockDeviceMapping{
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{
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DeviceName: toPtr("/dev/xvda"),
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Ebs: &ec2types.EbsBlockDevice{
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DeleteOnTermination: toPtr(true),
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SnapshotId: &snapshotID,
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},
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},
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},
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BootMode: ec2types.BootModeValuesUefi,
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Description: toPtr("Constellation " + version.ShortPath()),
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EnaSupport: toPtr(true),
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RootDeviceName: toPtr("/dev/xvda"),
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TpmSupport: ec2types.TpmSupportValuesV20,
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UefiData: uefiData,
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VirtualizationType: toPtr("hvm"),
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})
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if err != nil {
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return "", fmt.Errorf("creating image: %w", err)
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}
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if createReq.ImageId == nil {
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return "", fmt.Errorf("creating image: no image ID returned")
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}
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return *createReq.ImageId, nil
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}
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func (u *Uploader) replicateImage(ctx context.Context, imageName, amiID string, region string) (string, error) {
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u.log.Debugf("Replicating image %s to %s", imageName, region)
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return "", fmt.Errorf("creating ec2 client: %w", err)
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}
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replicateReq, err := ec2C.CopyImage(ctx, &ec2.CopyImageInput{
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Name: &imageName,
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SourceImageId: &amiID,
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SourceRegion: &u.region,
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})
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if err != nil {
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return "", fmt.Errorf("replicating image: %w", err)
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}
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if replicateReq.ImageId == nil {
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return "", fmt.Errorf("replicating image: no image ID returned")
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}
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return *replicateReq.ImageId, nil
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}
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func (u *Uploader) findImage(ctx context.Context, imageName, region string) (string, error) {
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return "", fmt.Errorf("creating ec2 client: %w", err)
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}
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snapshots, err := ec2C.DescribeImages(ctx, &ec2.DescribeImagesInput{
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Filters: []ec2types.Filter{
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{
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Name: toPtr("name"),
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Values: []string{imageName},
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},
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},
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})
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if err != nil {
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return "", fmt.Errorf("describing images: %w", err)
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}
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if len(snapshots.Images) == 0 {
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return "", errAMIDoesNotExist
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}
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if len(snapshots.Images) != 1 {
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return "", fmt.Errorf("expected 1 image, got %d", len(snapshots.Images))
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}
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if snapshots.Images[0].ImageId == nil {
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return "", fmt.Errorf("image ID is nil")
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}
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return *snapshots.Images[0].ImageId, nil
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}
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func (u *Uploader) waitForImage(ctx context.Context, amiID, region string) error {
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u.log.Debugf("Waiting for image %s in %s to be created", amiID, region)
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return fmt.Errorf("creating ec2 client: %w", err)
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}
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waiter := ec2.NewImageAvailableWaiter(ec2C)
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err = waiter.Wait(ctx, &ec2.DescribeImagesInput{
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ImageIds: []string{amiID},
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}, maxWait)
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if err != nil {
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return fmt.Errorf("waiting for image: %w", err)
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}
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return nil
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}
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func (u *Uploader) tagImageAndSnapshot(ctx context.Context, imageName, amiID, region string) error {
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u.log.Debugf("Tagging backing snapshot of image %s in %s", amiID, region)
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return fmt.Errorf("creating ec2 client: %w", err)
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}
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snapshotID, err := getBackingSnapshotID(ctx, ec2C, amiID)
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if err != nil {
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return fmt.Errorf("getting backing snapshot ID: %w", err)
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}
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_, err = ec2C.CreateTags(ctx, &ec2.CreateTagsInput{
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Resources: []string{amiID, snapshotID},
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Tags: []ec2types.Tag{
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{
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Key: toPtr("Name"),
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Value: toPtr(imageName),
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},
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},
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})
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if err != nil {
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return fmt.Errorf("tagging ami and snapshot: %w", err)
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}
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return nil
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}
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func (u *Uploader) publishImage(ctx context.Context, imageName, region string) error {
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u.log.Debugf("Publishing image %s in %s", imageName, region)
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return fmt.Errorf("creating ec2 client: %w", err)
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}
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_, err = ec2C.ModifyImageAttribute(ctx, &ec2.ModifyImageAttributeInput{
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ImageId: &imageName,
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LaunchPermission: &ec2types.LaunchPermissionModifications{
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Add: []ec2types.LaunchPermission{
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{
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Group: ec2types.PermissionGroupAll,
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},
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},
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},
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})
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if err != nil {
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return fmt.Errorf("publishing image: %w", err)
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}
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return nil
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}
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func (u *Uploader) ensureImageDeleted(ctx context.Context, imageName, region string) error {
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ec2C, err := u.ec2(ctx, region)
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if err != nil {
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return fmt.Errorf("creating ec2 client: %w", err)
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}
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amiID, err := u.findImage(ctx, imageName, region)
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if err == errAMIDoesNotExist {
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u.log.Debugf("Image %s in %s doesn't exist. Nothing to clean up.", imageName, region)
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return nil
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}
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snapshotID, err := getBackingSnapshotID(ctx, ec2C, amiID)
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if err == errAMIDoesNotExist {
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|
u.log.Debugf("Image %s doesn't exist. Nothing to clean up.", amiID)
|
|
return nil
|
|
}
|
|
u.log.Debugf("Deleting image %s in %s with backing snapshot", amiID, region)
|
|
_, err = ec2C.DeregisterImage(ctx, &ec2.DeregisterImageInput{
|
|
ImageId: &amiID,
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("deleting image: %w", err)
|
|
}
|
|
_, err = ec2C.DeleteSnapshot(ctx, &ec2.DeleteSnapshotInput{
|
|
SnapshotId: &snapshotID,
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("deleting snapshot: %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func imageName(version versionsapi.Version, attestationVariant string, timestamp time.Time) string {
|
|
if version.Stream() == "stable" {
|
|
return fmt.Sprintf("constellation-%s-%s", version.Version(), attestationVariant)
|
|
}
|
|
return fmt.Sprintf("constellation-%s-%s-%s-%s", version.Stream(), version.Version(), attestationVariant, timestamp.Format(timestampFormat))
|
|
}
|
|
|
|
func waitForSnapshotImport(ctx context.Context, ec2C ec2API, importTaskID string) (string, error) {
|
|
for {
|
|
taskResp, err := ec2C.DescribeImportSnapshotTasks(ctx, &ec2.DescribeImportSnapshotTasksInput{
|
|
ImportTaskIds: []string{importTaskID},
|
|
})
|
|
if err != nil {
|
|
return "", fmt.Errorf("describing import snapshot task: %w", err)
|
|
}
|
|
if len(taskResp.ImportSnapshotTasks) == 0 {
|
|
return "", fmt.Errorf("describing import snapshot task: no tasks returned")
|
|
}
|
|
if taskResp.ImportSnapshotTasks[0].SnapshotTaskDetail == nil {
|
|
return "", fmt.Errorf("describing import snapshot task: no snapshot task detail returned")
|
|
}
|
|
if taskResp.ImportSnapshotTasks[0].SnapshotTaskDetail.Status == nil {
|
|
return "", fmt.Errorf("describing import snapshot task: no status returned")
|
|
}
|
|
switch *taskResp.ImportSnapshotTasks[0].SnapshotTaskDetail.Status {
|
|
case string(ec2types.SnapshotStateCompleted):
|
|
return *taskResp.ImportSnapshotTasks[0].SnapshotTaskDetail.SnapshotId, nil
|
|
case string(ec2types.SnapshotStateError):
|
|
return "", fmt.Errorf("importing snapshot: task failed")
|
|
}
|
|
time.Sleep(waitInterval)
|
|
}
|
|
}
|
|
|
|
func getBackingSnapshotID(ctx context.Context, ec2C ec2API, amiID string) (string, error) {
|
|
describeResp, err := ec2C.DescribeImages(ctx, &ec2.DescribeImagesInput{
|
|
ImageIds: []string{amiID},
|
|
})
|
|
if err != nil || len(describeResp.Images) == 0 {
|
|
return "", errAMIDoesNotExist
|
|
}
|
|
if len(describeResp.Images) != 1 {
|
|
return "", fmt.Errorf("describing image: expected 1 image, got %d", len(describeResp.Images))
|
|
}
|
|
image := describeResp.Images[0]
|
|
if len(image.BlockDeviceMappings) != 1 {
|
|
return "", fmt.Errorf("found %d block device mappings for image %s, expected 1", len(image.BlockDeviceMappings), amiID)
|
|
}
|
|
if image.BlockDeviceMappings[0].Ebs == nil {
|
|
return "", fmt.Errorf("image %s does not have an EBS block device mapping", amiID)
|
|
}
|
|
ebs := image.BlockDeviceMappings[0].Ebs
|
|
if ebs.SnapshotId == nil {
|
|
return "", fmt.Errorf("image %s does not have an EBS snapshot", amiID)
|
|
}
|
|
return *ebs.SnapshotId, nil
|
|
}
|
|
|
|
type ec2API interface {
|
|
DescribeImages(ctx context.Context, params *ec2.DescribeImagesInput,
|
|
optFns ...func(*ec2.Options),
|
|
) (*ec2.DescribeImagesOutput, error)
|
|
ModifyImageAttribute(ctx context.Context, params *ec2.ModifyImageAttributeInput,
|
|
optFns ...func(*ec2.Options),
|
|
) (*ec2.ModifyImageAttributeOutput, error)
|
|
RegisterImage(ctx context.Context, params *ec2.RegisterImageInput,
|
|
optFns ...func(*ec2.Options),
|
|
) (*ec2.RegisterImageOutput, error)
|
|
CopyImage(ctx context.Context, params *ec2.CopyImageInput, optFns ...func(*ec2.Options),
|
|
) (*ec2.CopyImageOutput, error)
|
|
DeregisterImage(ctx context.Context, params *ec2.DeregisterImageInput,
|
|
optFns ...func(*ec2.Options),
|
|
) (*ec2.DeregisterImageOutput, error)
|
|
ImportSnapshot(ctx context.Context, params *ec2.ImportSnapshotInput,
|
|
optFns ...func(*ec2.Options),
|
|
) (*ec2.ImportSnapshotOutput, error)
|
|
DescribeImportSnapshotTasks(ctx context.Context, params *ec2.DescribeImportSnapshotTasksInput,
|
|
optFns ...func(*ec2.Options),
|
|
) (*ec2.DescribeImportSnapshotTasksOutput, error)
|
|
DescribeSnapshots(ctx context.Context, params *ec2.DescribeSnapshotsInput,
|
|
optFns ...func(*ec2.Options),
|
|
) (*ec2.DescribeSnapshotsOutput, error)
|
|
DeleteSnapshot(ctx context.Context, params *ec2.DeleteSnapshotInput, optFns ...func(*ec2.Options),
|
|
) (*ec2.DeleteSnapshotOutput, error)
|
|
CreateTags(ctx context.Context, params *ec2.CreateTagsInput, optFns ...func(*ec2.Options),
|
|
) (*ec2.CreateTagsOutput, error)
|
|
}
|
|
|
|
type s3API interface {
|
|
HeadBucket(ctx context.Context, params *s3.HeadBucketInput, optFns ...func(*s3.Options),
|
|
) (*s3.HeadBucketOutput, error)
|
|
CreateBucket(ctx context.Context, params *s3.CreateBucketInput, optFns ...func(*s3.Options),
|
|
) (*s3.CreateBucketOutput, error)
|
|
HeadObject(ctx context.Context, params *s3.HeadObjectInput, optFns ...func(*s3.Options),
|
|
) (*s3.HeadObjectOutput, error)
|
|
DeleteObject(ctx context.Context, params *s3.DeleteObjectInput, optFns ...func(*s3.Options),
|
|
) (*s3.DeleteObjectOutput, error)
|
|
}
|
|
|
|
type s3UploaderAPI interface {
|
|
Upload(ctx context.Context, input *s3.PutObjectInput, opts ...func(*s3manager.Uploader),
|
|
) (*s3manager.UploadOutput, error)
|
|
}
|
|
|
|
func toPtr[T any](v T) *T {
|
|
return &v
|
|
}
|
|
|
|
const (
|
|
waitInterval = 15 * time.Second
|
|
maxWait = 30 * time.Minute
|
|
timestampFormat = "20060102150405"
|
|
)
|
|
|
|
var (
|
|
errAMIDoesNotExist = errors.New("ami does not exist")
|
|
replicationRegions = []string{"eu-west-1", "eu-west-3", "us-east-2", "ap-south-1"}
|
|
)
|