X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/5836e576fe0b78c50383cf56e1c4fb4521daeca1..e62dc0ffea0983f6a17ef16b368a0dceb62b98ea:/services/keepstore/s3_volume.go

diff --git a/services/keepstore/s3_volume.go b/services/keepstore/s3_volume.go
index bdab58927b..fb978fe2ba 100644
--- a/services/keepstore/s3_volume.go
+++ b/services/keepstore/s3_volume.go
@@ -7,6 +7,7 @@ package main
 import (
 	"bytes"
 	"context"
+	"crypto/sha256"
 	"encoding/base64"
 	"encoding/hex"
 	"flag"
@@ -235,6 +236,10 @@ func (v *S3Volume) Start() error {
 	}
 
 	client := s3.New(auth, region)
+	if region.EC2Endpoint.Signer == aws.V4Signature {
+		// Currently affects only eu-central-1
+		client.Signature = aws.V4Signature
+	}
 	client.ConnectTimeout = time.Duration(v.ConnectTimeout)
 	client.ReadTimeout = time.Duration(v.ReadTimeout)
 	v.bucket = &s3bucket{
@@ -398,6 +403,14 @@ func (v *S3Volume) Put(ctx context.Context, loc string, block []byte) error {
 			return err
 		}
 		opts.ContentMD5 = base64.StdEncoding.EncodeToString(md5)
+		// In AWS regions that use V4 signatures, we need to
+		// provide ContentSHA256 up front. Otherwise, the S3
+		// library reads the request body (from our buffer)
+		// into another new buffer in order to compute the
+		// SHA256 before sending the request -- which would
+		// mean consuming 128 MiB of memory for the duration
+		// of a 64 MiB write.
+		opts.ContentSHA256 = fmt.Sprintf("%x", sha256.Sum256(block))
 	}
 
 	// Send the block data through a pipe, so that (if we need to)
@@ -497,16 +510,15 @@ func (v *S3Volume) IndexTo(prefix string, writer io.Writer) error {
 		Bucket:   v.bucket.Bucket,
 		Prefix:   prefix,
 		PageSize: v.IndexPageSize,
+		Stats:    &v.bucket.stats,
 	}
 	recentL := s3Lister{
 		Bucket:   v.bucket.Bucket,
 		Prefix:   "recent/" + prefix,
 		PageSize: v.IndexPageSize,
+		Stats:    &v.bucket.stats,
 	}
-	v.bucket.stats.Tick(&v.bucket.stats.Ops, &v.bucket.stats.ListOps)
-	v.bucket.stats.Tick(&v.bucket.stats.Ops, &v.bucket.stats.ListOps)
-	for data, recent := dataL.First(), recentL.First(); data != nil; data = dataL.Next() {
-		v.bucket.stats.Tick(&v.bucket.stats.Ops, &v.bucket.stats.ListOps)
+	for data, recent := dataL.First(), recentL.First(); data != nil && dataL.Error() == nil; data = dataL.Next() {
 		if data.Key >= "g" {
 			// Conveniently, "recent/*" and "trash/*" are
 			// lexically greater than all hex-encoded data
@@ -525,15 +537,13 @@ func (v *S3Volume) IndexTo(prefix string, writer io.Writer) error {
 		stamp := data
 
 		// Advance to the corresponding recent/X marker, if any
-		for recent != nil {
+		for recent != nil && recentL.Error() == nil {
 			if cmp := strings.Compare(recent.Key[7:], data.Key); cmp < 0 {
 				recent = recentL.Next()
-				v.bucket.stats.Tick(&v.bucket.stats.Ops, &v.bucket.stats.ListOps)
 				continue
 			} else if cmp == 0 {
 				stamp = recent
 				recent = recentL.Next()
-				v.bucket.stats.Tick(&v.bucket.stats.Ops, &v.bucket.stats.ListOps)
 				break
 			} else {
 				// recent/X marker is missing: we'll
@@ -542,13 +552,16 @@ func (v *S3Volume) IndexTo(prefix string, writer io.Writer) error {
 				break
 			}
 		}
+		if err := recentL.Error(); err != nil {
+			return err
+		}
 		t, err := time.Parse(time.RFC3339, stamp.LastModified)
 		if err != nil {
 			return err
 		}
 		fmt.Fprintf(writer, "%s+%d %d\n", data.Key, data.Size, t.UnixNano())
 	}
-	return nil
+	return dataL.Error()
 }
 
 // Trash a Keep block.
@@ -620,8 +633,10 @@ func (v *S3Volume) safeCopy(dst, src string) error {
 		MetadataDirective: "REPLACE",
 	}, v.bucket.Name+"/"+src)
 	err = v.translateError(err)
-	if err != nil {
+	if os.IsNotExist(err) {
 		return err
+	} else if err != nil {
+		return fmt.Errorf("PutCopy(%q ← %q): %s", dst, v.bucket.Name+"/"+src, err)
 	}
 	if t, err := time.Parse(time.RFC3339Nano, resp.LastModified); err != nil {
 		return fmt.Errorf("PutCopy succeeded but did not return a timestamp: %q: %s", resp.LastModified, err)
@@ -867,6 +882,7 @@ func (v *S3Volume) EmptyTrash() {
 		Bucket:   v.bucket.Bucket,
 		Prefix:   "trash/",
 		PageSize: v.IndexPageSize,
+		Stats:    &v.bucket.stats,
 	}
 	for trash := trashL.First(); trash != nil; trash = trashL.Next() {
 		todo <- trash
@@ -884,6 +900,7 @@ type s3Lister struct {
 	Bucket     *s3.Bucket
 	Prefix     string
 	PageSize   int
+	Stats      *s3bucketStats
 	nextMarker string
 	buf        []s3.Key
 	err        error
@@ -912,6 +929,7 @@ func (lister *s3Lister) Error() error {
 }
 
 func (lister *s3Lister) getPage() {
+	lister.Stats.Tick(&lister.Stats.Ops, &lister.Stats.ListOps)
 	resp, err := lister.Bucket.List(lister.Prefix, "", lister.nextMarker, lister.PageSize)
 	lister.nextMarker = ""
 	if err != nil {