/
create_machine_image_manifest_driver.go
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/
create_machine_image_manifest_driver.go
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package driver
import (
"bytes"
"encoding/xml"
"errors"
"fmt"
"io"
"github.com/jevyzhu/light-stemcell-builder/config"
"github.com/jevyzhu/light-stemcell-builder/driver/manifests"
"github.com/jevyzhu/light-stemcell-builder/resources"
"log"
"math"
"os"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
)
const gbInBytes = 1 << 30
// The SDKCreateMachineImageManifestDriver uploads a machine image to S3 and creates an import volume manifest
type SDKCreateMachineImageManifestDriver struct {
s3Client *s3.S3
logger *log.Logger
genManifest bool
}
// NewCreateMachineImageManifestDriver creates a MachineImageDriver machine image manifest generation
func NewCreateMachineImageManifestDriver(logDest io.Writer, creds config.Credentials) *SDKCreateMachineImageManifestDriver {
logger := log.New(logDest, "SDKCreateMachineImageManifestDriver ", log.LstdFlags)
awsConfig := aws.NewConfig().
WithCredentials(awsCreds(creds)).
WithRegion(creds.Region).
WithLogger(newDriverLogger(logger))
s3Retryer := S3Retryer{}
s3Retryer.NumMaxRetries = 50
awsConfig.Retryer = s3Retryer
s3Session := session.New(awsConfig)
s3Client := s3.New(s3Session)
return &SDKCreateMachineImageManifestDriver{
s3Client: s3Client,
logger: logger,
}
}
// Create uploads a machine image to S3 and returns a presigned URL to an import volume manifest
func (d *SDKCreateMachineImageManifestDriver) Create(driverConfig resources.MachineImageDriverConfig) (resources.MachineImage, error) {
createStartTime := time.Now()
defer func(startTime time.Time) {
d.logger.Printf("completed Create() in %f minutes\n", time.Since(startTime).Minutes())
}(createStartTime)
d.logger.Printf("opening image for upload to S3: %s\n", driverConfig.MachineImagePath)
f, err := os.Open(driverConfig.MachineImagePath)
if err != nil {
return resources.MachineImage{}, fmt.Errorf("opening machine image for upload: %s", err)
}
keyName := fmt.Sprintf("bosh-machine-image-%d", time.Now().UnixNano())
d.logger.Printf("uploading image to s3://%s/%s\n", driverConfig.BucketName, keyName)
uploadStartTime := time.Now()
uploader := s3manager.NewUploaderWithClient(d.s3Client)
input := &s3manager.UploadInput{
Body: f,
Bucket: aws.String(driverConfig.BucketName),
Key: aws.String(keyName),
}
if driverConfig.ServerSideEncryption != "" {
input.ServerSideEncryption = aws.String(driverConfig.ServerSideEncryption)
}
_, err = uploader.Upload(input)
if err != nil {
return resources.MachineImage{}, fmt.Errorf("uploading machine image to S3: %s", err)
}
d.logger.Printf("finished uploaded image to s3 after %f minutes\n", time.Since(uploadStartTime).Minutes())
headReqOutput, err := d.s3Client.HeadObject(&s3.HeadObjectInput{
Bucket: aws.String(driverConfig.BucketName),
Key: aws.String(keyName),
})
if err != nil {
return resources.MachineImage{}, fmt.Errorf("fetching properties for uploaded machine image: %s in bucket: %s: %s", keyName, driverConfig.BucketName, err)
}
sizeInBytesPtr := headReqOutput.ContentLength
if sizeInBytesPtr == nil {
return resources.MachineImage{}, errors.New("size in bytes nil")
}
volumeSizeGB := driverConfig.VolumeSizeGB
if volumeSizeGB == 0 {
// default to size of image if VolumeSize is not provided
volumeSizeGB = int64(math.Ceil(float64(*sizeInBytesPtr) / gbInBytes))
}
m, err := d.generateManifest(driverConfig.BucketName, keyName, *sizeInBytesPtr, volumeSizeGB, driverConfig.FileFormat)
if err != nil {
return resources.MachineImage{}, fmt.Errorf("Failed to generate machine image manifest: %s", err)
}
manifestURL, err := d.uploadManifest(driverConfig.BucketName, driverConfig.ServerSideEncryption, m)
machineImage := resources.MachineImage{
GetURL: manifestURL,
DeleteURLs: []string{m.SelfDestructURL, m.Parts.Part.DeleteURL},
}
return machineImage, nil
}
func (d *SDKCreateMachineImageManifestDriver) generateManifest(bucketName string, keyName string, sizeInBytes int64, volumeSizeGB int64, fileFormat string) (*manifests.ImportVolumeManifest, error) {
// Generate presigned GET request
req, _ := d.s3Client.GetObjectRequest(&s3.GetObjectInput{
Bucket: aws.String(bucketName),
Key: aws.String(keyName),
})
presignedGetURL, err := req.Presign(2 * time.Hour)
if err != nil {
return nil, fmt.Errorf("failed to sign request: %s", err)
}
d.logger.Printf("generated presigned GET URL %s\n", presignedGetURL)
// Generate presigned HEAD request for the machine image
req, _ = d.s3Client.HeadObjectRequest(&s3.HeadObjectInput{
Bucket: aws.String(bucketName),
Key: aws.String(keyName),
})
presignedHeadURL, err := req.Presign(1 * time.Hour)
if err != nil {
return nil, fmt.Errorf("failed to sign request: %s", err)
}
d.logger.Printf("generated presigned HEAD URL %s\n", presignedHeadURL)
// Generate presigned DELETE request for the machine image
req, _ = d.s3Client.DeleteObjectRequest(&s3.DeleteObjectInput{
Bucket: aws.String(bucketName),
Key: aws.String(keyName),
})
presignedDeleteURL, err := req.Presign(1 * time.Hour)
if err != nil {
return nil, fmt.Errorf("failed to sign request: %s", err)
}
d.logger.Printf("generated presigned DELETE URL %s\n", presignedDeleteURL)
imageProps := manifests.MachineImageProperties{
KeyName: keyName,
HeadURL: presignedHeadURL,
GetURL: presignedGetURL,
DeleteURL: presignedDeleteURL,
SizeBytes: sizeInBytes,
VolumeSizeGB: volumeSizeGB,
FileFormat: fileFormat,
}
return manifests.New(imageProps), nil
}
func (d *SDKCreateMachineImageManifestDriver) uploadManifest(bucketName, serverSideEncryption string, m *manifests.ImportVolumeManifest) (string, error) {
manifestKey := fmt.Sprintf("bosh-machine-image-manifest-%d", time.Now().UnixNano())
// create presigned GET request for the manifest
getReq, _ := d.s3Client.GetObjectRequest(&s3.GetObjectInput{
Bucket: aws.String(bucketName),
Key: aws.String(manifestKey),
})
manifestGetURL, err := getReq.Presign(1 * time.Hour)
if err != nil {
return "", fmt.Errorf("failed to sign manifest GET request: %s", err)
}
d.logger.Printf("generated presigned manifest GET URL %s\n", manifestGetURL)
// create presigned DELETE request for the manifest
deleteReq, _ := d.s3Client.DeleteObjectRequest(&s3.DeleteObjectInput{
Bucket: aws.String(bucketName),
Key: aws.String(manifestKey),
})
manifestDeleteURL, err := deleteReq.Presign(2 * time.Hour)
if err != nil {
return "", fmt.Errorf("failed to sign manifest delete request: %s", err)
}
d.logger.Printf("generated presigned manifest DELETE URL %s\n", manifestDeleteURL)
m.SelfDestructURL = manifestDeleteURL
manifestBytes, err := xml.Marshal(m)
if err != nil {
return "", fmt.Errorf("serializing machine image manifest: %s", err)
}
manifestReader := bytes.NewReader(manifestBytes)
uploadStartTime := time.Now()
uploader := s3manager.NewUploaderWithClient(d.s3Client)
input := &s3manager.UploadInput{
Body: manifestReader,
Bucket: aws.String(bucketName),
Key: aws.String(manifestKey),
}
if serverSideEncryption != "" {
input.ServerSideEncryption = aws.String(serverSideEncryption)
}
_, err = uploader.Upload(input)
if err != nil {
return "", fmt.Errorf("uploading machine image manifest to S3: %s", err)
}
d.logger.Printf("finished uploaded machine image manifest to s3 after %f seconds\n", time.Since(uploadStartTime).Seconds())
return manifestGetURL, nil
}