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s3_store.go
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/
s3_store.go
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package filestore
import (
"context"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
awssession "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"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/logger"
kotss3 "github.com/replicatedhq/kots/pkg/s3"
)
type S3Store struct {
}
func (s *S3Store) Init() error {
if strings.HasPrefix(os.Getenv("STORAGE_BASEURI"), "docker://") {
return nil
}
if os.Getenv("S3_BUCKET_NAME") == "ship-pacts" {
log.Println("Not creating bucket because the desired name is ship-pacts. Consider using a different bucket name to make this work.")
return errors.New("bad bucket name")
}
if os.Getenv("S3_SKIP_ENSURE_BUCKET") == "1" {
log.Println("Not creating bucket because S3_SKIP_ENSURE_BUCKET was set.")
return nil
}
newSession := awssession.New(kotss3.GetConfig())
s3Client := s3.New(newSession)
_, err := s3Client.HeadBucket(&s3.HeadBucketInput{
Bucket: aws.String(os.Getenv("S3_BUCKET_NAME")),
})
if err == nil {
return nil
}
_, err = s3Client.CreateBucket(&s3.CreateBucketInput{
Bucket: aws.String(os.Getenv("S3_BUCKET_NAME")),
})
if err != nil {
return errors.Wrap(err, "failed to create bucket")
}
return nil
}
func (s *S3Store) WaitForReady(ctx context.Context) error {
if strings.HasPrefix(os.Getenv("STORAGE_BASEURI"), "docker://") {
return nil
}
if os.Getenv("S3_BUCKET_NAME") == "ship-pacts" {
log.Println("Not creating bucket because the desired name is ship-pacts. Consider using a different bucket name to make this work.")
return errors.New("bad bucket name")
}
if os.Getenv("S3_SKIP_ENSURE_BUCKET") == "1" {
log.Println("Not creating bucket because S3_SKIP_ENSURE_BUCKET was set.")
return nil
}
logger.Debug("waiting for object store to be ready")
newSession := awssession.New(kotss3.GetConfig())
s3Client := s3.New(newSession)
period := 1 * time.Second // TOOD: backoff
for {
_, err := s3Client.HeadBucket(&s3.HeadBucketInput{
Bucket: aws.String(os.Getenv("S3_BUCKET_NAME")),
})
if err == nil {
logger.Debug("object store is ready")
return nil
}
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "NotFound" {
logger.Debug("object store is ready")
return nil
}
select {
case <-time.After(period):
continue
case <-ctx.Done():
return errors.Errorf("failed to find valid object store: %s, last error: %s", ctx.Err(), err)
}
}
}
func (s *S3Store) WriteArchive(outputPath string, body io.ReadSeeker) error {
newSession := awssession.New(kotss3.GetConfig())
s3Client := s3.New(newSession)
_, err := s3Client.PutObject(&s3.PutObjectInput{
Body: body,
Bucket: aws.String(os.Getenv("S3_BUCKET_NAME")),
Key: aws.String(outputPath),
})
if err != nil {
return errors.Wrap(err, "failed to upload to s3")
}
return nil
}
func (s *S3Store) ReadArchive(path string) (string, error) {
tmpDir, err := ioutil.TempDir("", "kotsadm")
if err != nil {
return "", errors.Wrap(err, "failed to create temp dir")
}
parts := strings.Split(path, string(os.PathSeparator))
outputFilePath := filepath.Join(tmpDir, parts[len(parts)-1])
outputFile, err := os.Create(outputFilePath)
if err != nil {
return "", errors.Wrap(err, "failed to open file")
}
defer outputFile.Close()
newSession := awssession.New(kotss3.GetConfig())
downloader := s3manager.NewDownloader(newSession)
_, err = downloader.Download(outputFile,
&s3.GetObjectInput{
Bucket: aws.String(os.Getenv("S3_BUCKET_NAME")),
Key: aws.String(path),
})
if err != nil {
return "", errors.Wrapf(err, "failed to download key %q from bucket %q", path, os.Getenv("S3_BUCKET_NAME"))
}
return outputFilePath, nil
}
func (s *S3Store) DeleteArchive(path string) error {
newSession := awssession.New(kotss3.GetConfig())
s3Client := s3.New(newSession)
iter := s3manager.NewDeleteListIterator(s3Client, &s3.ListObjectsInput{
Bucket: aws.String(os.Getenv("S3_BUCKET_NAME")),
Prefix: aws.String(path),
})
if err := s3manager.NewBatchDeleteWithClient(s3Client).Delete(aws.BackgroundContext(), iter); err != nil {
return errors.Wrap(err, "failed to delete from s3")
}
return nil
}