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/*
* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"context"
"encoding/xml"
"fmt"
"io"
"net/http"
"runtime"
"strings"
"time"
miniogo "github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/tags"
"github.com/minio/minio/cmd/crypto"
xhttp "github.com/minio/minio/cmd/http"
"github.com/minio/minio/cmd/logger"
sse "github.com/minio/minio/pkg/bucket/encryption"
"github.com/minio/minio/pkg/bucket/lifecycle"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/hash"
"github.com/minio/minio/pkg/madmin"
"github.com/minio/minio/pkg/s3select"
)
const (
// Disabled means the lifecycle rule is inactive
Disabled = "Disabled"
)
// LifecycleSys - Bucket lifecycle subsystem.
type LifecycleSys struct{}
// Get - gets lifecycle config associated to a given bucket name.
func (sys *LifecycleSys) Get(bucketName string) (lc *lifecycle.Lifecycle, err error) {
if globalIsGateway {
objAPI := newObjectLayerFn()
if objAPI == nil {
return nil, errServerNotInitialized
}
return nil, BucketLifecycleNotFound{Bucket: bucketName}
}
return globalBucketMetadataSys.GetLifecycleConfig(bucketName)
}
// NewLifecycleSys - creates new lifecycle system.
func NewLifecycleSys() *LifecycleSys {
return &LifecycleSys{}
}
type transitionState struct {
// add future metrics here
transitionCh chan ObjectInfo
}
func (t *transitionState) queueTransitionTask(oi ObjectInfo) {
select {
case t.transitionCh <- oi:
default:
}
}
var (
globalTransitionState *transitionState
globalTransitionConcurrent = runtime.GOMAXPROCS(0) / 2
)
func newTransitionState() *transitionState {
// fix minimum concurrent transition to 1 for single CPU setup
if globalTransitionConcurrent == 0 {
globalTransitionConcurrent = 1
}
ts := &transitionState{
transitionCh: make(chan ObjectInfo, 10000),
}
go func() {
<-GlobalContext.Done()
close(ts.transitionCh)
}()
return ts
}
// addWorker creates a new worker to process tasks
func (t *transitionState) addWorker(ctx context.Context, objectAPI ObjectLayer) {
// Add a new worker.
go func() {
for {
select {
case <-ctx.Done():
return
case oi, ok := <-t.transitionCh:
if !ok {
return
}
transitionObject(ctx, objectAPI, oi)
}
}
}()
}
func initBackgroundTransition(ctx context.Context, objectAPI ObjectLayer) {
if globalTransitionState == nil {
return
}
// Start with globalTransitionConcurrent.
for i := 0; i < globalTransitionConcurrent; i++ {
globalTransitionState.addWorker(ctx, objectAPI)
}
}
func validateLifecycleTransition(ctx context.Context, bucket string, lfc *lifecycle.Lifecycle) error {
for _, rule := range lfc.Rules {
if rule.Transition.StorageClass != "" {
sameTarget, destbucket, err := validateTransitionDestination(ctx, bucket, rule.Transition.StorageClass)
if err != nil {
return err
}
if sameTarget && destbucket == bucket {
return fmt.Errorf("Transition destination cannot be the same as the source bucket")
}
}
}
return nil
}
// validateTransitionDestination returns error if transition destination bucket missing or not configured
// It also returns true if transition destination is same as this server.
func validateTransitionDestination(ctx context.Context, bucket string, targetLabel string) (bool, string, error) {
tgt := globalBucketTargetSys.GetRemoteTargetWithLabel(ctx, bucket, targetLabel)
if tgt == nil {
return false, "", BucketRemoteTargetNotFound{Bucket: bucket}
}
arn, err := madmin.ParseARN(tgt.Arn)
if err != nil {
return false, "", BucketRemoteTargetNotFound{Bucket: bucket}
}
clnt := globalBucketTargetSys.GetRemoteTargetClient(ctx, tgt.Arn)
if clnt == nil {
return false, "", BucketRemoteTargetNotFound{Bucket: bucket}
}
if found, _ := clnt.BucketExists(ctx, arn.Bucket); !found {
return false, "", BucketRemoteDestinationNotFound{Bucket: arn.Bucket}
}
sameTarget, _ := isLocalHost(clnt.EndpointURL().Hostname(), clnt.EndpointURL().Port(), globalMinioPort)
return sameTarget, arn.Bucket, nil
}
// transitionSC returns storage class label for this bucket
func transitionSC(ctx context.Context, bucket string) string {
cfg, err := globalBucketMetadataSys.GetLifecycleConfig(bucket)
if err != nil {
return ""
}
for _, rule := range cfg.Rules {
if rule.Status == Disabled {
continue
}
if rule.Transition.StorageClass != "" {
return rule.Transition.StorageClass
}
}
return ""
}
// return true if ARN representing transition storage class is present in a active rule
// for the lifecycle configured on this bucket
func transitionSCInUse(ctx context.Context, lfc *lifecycle.Lifecycle, bucket, arnStr string) bool {
tgtLabel := globalBucketTargetSys.GetRemoteLabelWithArn(ctx, bucket, arnStr)
if tgtLabel == "" {
return false
}
for _, rule := range lfc.Rules {
if rule.Status == Disabled {
continue
}
if rule.Transition.StorageClass != "" && rule.Transition.StorageClass == tgtLabel {
return true
}
}
return false
}
// set PutObjectOptions for PUT operation to transition data to target cluster
func putTransitionOpts(objInfo ObjectInfo) (putOpts miniogo.PutObjectOptions) {
meta := make(map[string]string)
tag, err := tags.ParseObjectTags(objInfo.UserTags)
if err != nil {
return
}
putOpts = miniogo.PutObjectOptions{
UserMetadata: meta,
UserTags: tag.ToMap(),
ContentType: objInfo.ContentType,
ContentEncoding: objInfo.ContentEncoding,
StorageClass: objInfo.StorageClass,
Internal: miniogo.AdvancedPutOptions{
SourceVersionID: objInfo.VersionID,
SourceMTime: objInfo.ModTime,
SourceETag: objInfo.ETag,
},
}
if mode, ok := objInfo.UserDefined[xhttp.AmzObjectLockMode]; ok {
rmode := miniogo.RetentionMode(mode)
putOpts.Mode = rmode
}
if retainDateStr, ok := objInfo.UserDefined[xhttp.AmzObjectLockRetainUntilDate]; ok {
rdate, err := time.Parse(time.RFC3339, retainDateStr)
if err != nil {
return
}
putOpts.RetainUntilDate = rdate
}
if lhold, ok := objInfo.UserDefined[xhttp.AmzObjectLockLegalHold]; ok {
putOpts.LegalHold = miniogo.LegalHoldStatus(lhold)
}
return
}
// handle deletes of transitioned objects or object versions when one of the following is true:
// 1. temporarily restored copies of objects (restored with the PostRestoreObject API) expired.
// 2. life cycle expiry date is met on the object.
func deleteTransitionedObject(ctx context.Context, objectAPI ObjectLayer, bucket, object string, objInfo ObjectInfo, lcOpts lifecycle.ObjectOpts, action lifecycle.Action) error {
if objInfo.TransitionStatus == "" {
return nil
}
lc, err := globalLifecycleSys.Get(bucket)
if err != nil {
return err
}
arn := getLifecycleTransitionTargetArn(ctx, lc, bucket, lcOpts)
if arn == nil {
return fmt.Errorf("remote target not configured")
}
tgt := globalBucketTargetSys.GetRemoteTargetClient(ctx, arn.String())
if tgt == nil {
return fmt.Errorf("remote target not configured")
}
var opts ObjectOptions
opts.Versioned = globalBucketVersioningSys.Enabled(bucket)
opts.VersionID = objInfo.VersionID
switch action {
case lifecycle.DeleteRestoredAction, lifecycle.DeleteRestoredVersionAction:
// delete locally restored copy of object or object version
// from the source, while leaving metadata behind. The data on
// transitioned tier lies untouched and still accessible
opts.TransitionStatus = objInfo.TransitionStatus
_, err = objectAPI.DeleteObject(ctx, bucket, object, opts)
return err
case lifecycle.DeleteAction, lifecycle.DeleteVersionAction:
// When an object is past expiry, delete the data from transitioned tier and
// metadata from source
if err := tgt.RemoveObject(ctx, arn.Bucket, object, miniogo.RemoveObjectOptions{VersionID: objInfo.VersionID}); err != nil {
logger.LogIf(ctx, err)
}
_, err = objectAPI.DeleteObject(ctx, bucket, object, opts)
if err != nil {
return err
}
eventName := event.ObjectRemovedDelete
if objInfo.DeleteMarker {
eventName = event.ObjectRemovedDeleteMarkerCreated
}
// Notify object deleted event.
sendEvent(eventArgs{
EventName: eventName,
BucketName: bucket,
Object: objInfo,
Host: "Internal: [ILM-EXPIRY]",
})
}
// should never reach here
return nil
}
// transition object to target specified by the transition ARN. When an object is transitioned to another
// storage specified by the transition ARN, the metadata is left behind on source cluster and original content
// is moved to the transition tier. Note that in the case of encrypted objects, entire encrypted stream is moved
// to the transition tier without decrypting or re-encrypting.
func transitionObject(ctx context.Context, objectAPI ObjectLayer, objInfo ObjectInfo) error {
lc, err := globalLifecycleSys.Get(objInfo.Bucket)
if err != nil {
return err
}
lcOpts := lifecycle.ObjectOpts{
Name: objInfo.Name,
UserTags: objInfo.UserTags,
}
arn := getLifecycleTransitionTargetArn(ctx, lc, objInfo.Bucket, lcOpts)
if arn == nil {
return fmt.Errorf("remote target not configured")
}
tgt := globalBucketTargetSys.GetRemoteTargetClient(ctx, arn.String())
if tgt == nil {
return fmt.Errorf("remote target not configured")
}
gr, err := objectAPI.GetObjectNInfo(ctx, objInfo.Bucket, objInfo.Name, nil, http.Header{}, readLock, ObjectOptions{
VersionID: objInfo.VersionID,
TransitionStatus: lifecycle.TransitionPending,
})
if err != nil {
return err
}
oi := gr.ObjInfo
if oi.TransitionStatus == lifecycle.TransitionComplete {
return nil
}
putOpts := putTransitionOpts(oi)
if _, err = tgt.PutObject(ctx, arn.Bucket, oi.Name, gr, oi.Size, "", "", putOpts); err != nil {
return err
}
gr.Close()
var opts ObjectOptions
opts.Versioned = globalBucketVersioningSys.Enabled(oi.Bucket)
opts.VersionID = oi.VersionID
opts.TransitionStatus = lifecycle.TransitionComplete
if _, err = objectAPI.DeleteObject(ctx, oi.Bucket, oi.Name, opts); err != nil {
return err
}
return nil
}
// getLifecycleTransitionTargetArn returns transition ARN for storage class specified in the config.
func getLifecycleTransitionTargetArn(ctx context.Context, lc *lifecycle.Lifecycle, bucket string, obj lifecycle.ObjectOpts) *madmin.ARN {
for _, rule := range lc.FilterActionableRules(obj) {
if rule.Transition.StorageClass != "" {
return globalBucketTargetSys.GetRemoteArnWithLabel(ctx, bucket, rule.Transition.StorageClass)
}
}
return nil
}
// getTransitionedObjectReader returns a reader from the transitioned tier.
func getTransitionedObjectReader(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, oi ObjectInfo, opts ObjectOptions) (gr *GetObjectReader, err error) {
var lc *lifecycle.Lifecycle
lc, err = globalLifecycleSys.Get(bucket)
if err != nil {
return nil, err
}
arn := getLifecycleTransitionTargetArn(ctx, lc, bucket, lifecycle.ObjectOpts{
Name: object,
UserTags: oi.UserTags,
ModTime: oi.ModTime,
VersionID: oi.VersionID,
DeleteMarker: oi.DeleteMarker,
IsLatest: oi.IsLatest,
})
if arn == nil {
return nil, fmt.Errorf("remote target not configured")
}
tgt := globalBucketTargetSys.GetRemoteTargetClient(ctx, arn.String())
if tgt == nil {
return nil, fmt.Errorf("remote target not configured")
}
fn, off, length, err := NewGetObjectReader(rs, oi, opts)
if err != nil {
return nil, ErrorRespToObjectError(err, bucket, object)
}
gopts := miniogo.GetObjectOptions{VersionID: opts.VersionID}
// get correct offsets for encrypted object
if off >= 0 && length >= 0 {
if err := gopts.SetRange(off, off+length-1); err != nil {
return nil, ErrorRespToObjectError(err, bucket, object)
}
}
reader, _, _, err := tgt.GetObject(ctx, arn.Bucket, object, gopts)
if err != nil {
return nil, err
}
closeReader := func() { reader.Close() }
return fn(reader, h, opts.CheckPrecondFn, closeReader)
}
// RestoreRequestType represents type of restore.
type RestoreRequestType string
const (
// SelectRestoreRequest specifies select request. This is the only valid value
SelectRestoreRequest RestoreRequestType = "SELECT"
)
// Encryption specifies encryption setting on restored bucket
type Encryption struct {
EncryptionType sse.SSEAlgorithm `xml:"EncryptionType"`
KMSContext string `xml:"KMSContext,omitempty"`
KMSKeyID string `xml:"KMSKeyId,omitempty"`
}
// MetadataEntry denotes name and value.
type MetadataEntry struct {
Name string `xml:"Name"`
Value string `xml:"Value"`
}
// S3Location specifies s3 location that receives result of a restore object request
type S3Location struct {
BucketName string `xml:"BucketName,omitempty"`
Encryption Encryption `xml:"Encryption,omitempty"`
Prefix string `xml:"Prefix,omitempty"`
StorageClass string `xml:"StorageClass,omitempty"`
Tagging *tags.Tags `xml:"Tagging,omitempty"`
UserMetadata []MetadataEntry `xml:"UserMetadata"`
}
// OutputLocation specifies bucket where object needs to be restored
type OutputLocation struct {
S3 S3Location `xml:"S3,omitempty"`
}
// IsEmpty returns true if output location not specified.
func (o *OutputLocation) IsEmpty() bool {
return o.S3.BucketName == ""
}
// SelectParameters specifies sql select parameters
type SelectParameters struct {
s3select.S3Select
}
// IsEmpty returns true if no select parameters set
func (sp *SelectParameters) IsEmpty() bool {
return sp == nil || sp.S3Select == s3select.S3Select{}
}
var (
selectParamsXMLName = "SelectParameters"
)
// UnmarshalXML - decodes XML data.
func (sp *SelectParameters) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Essentially the same as S3Select barring the xml name.
if start.Name.Local == selectParamsXMLName {
start.Name = xml.Name{Space: "", Local: "SelectRequest"}
}
return sp.S3Select.UnmarshalXML(d, start)
}
// RestoreObjectRequest - xml to restore a transitioned object
type RestoreObjectRequest struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ RestoreRequest" json:"-"`
Days int `xml:"Days,omitempty"`
Type RestoreRequestType `xml:"Type,omitempty"`
Tier string `xml:"Tier,-"`
Description string `xml:"Description,omitempty"`
SelectParameters *SelectParameters `xml:"SelectParameters,omitempty"`
OutputLocation OutputLocation `xml:"OutputLocation,omitempty"`
}
// Maximum 2MiB size per restore object request.
const maxRestoreObjectRequestSize = 2 << 20
// parseRestoreRequest parses RestoreObjectRequest from xml
func parseRestoreRequest(reader io.Reader) (*RestoreObjectRequest, error) {
req := RestoreObjectRequest{}
if err := xml.NewDecoder(io.LimitReader(reader, maxRestoreObjectRequestSize)).Decode(&req); err != nil {
return nil, err
}
return &req, nil
}
// validate a RestoreObjectRequest as per AWS S3 spec https://docs.aws.amazon.com/AmazonS3/latest/API/API_RestoreObject.html
func (r *RestoreObjectRequest) validate(ctx context.Context, objAPI ObjectLayer) error {
if r.Type != SelectRestoreRequest && !r.SelectParameters.IsEmpty() {
return fmt.Errorf("Select parameters can only be specified with SELECT request type")
}
if r.Type == SelectRestoreRequest && r.SelectParameters.IsEmpty() {
return fmt.Errorf("SELECT restore request requires select parameters to be specified")
}
if r.Type != SelectRestoreRequest && !r.OutputLocation.IsEmpty() {
return fmt.Errorf("OutputLocation required only for SELECT request type")
}
if r.Type == SelectRestoreRequest && r.OutputLocation.IsEmpty() {
return fmt.Errorf("OutputLocation required for SELECT requests")
}
if r.Days != 0 && r.Type == SelectRestoreRequest {
return fmt.Errorf("Days cannot be specified with SELECT restore request")
}
if r.Days == 0 && r.Type != SelectRestoreRequest {
return fmt.Errorf("restoration days should be at least 1")
}
// Check if bucket exists.
if !r.OutputLocation.IsEmpty() {
if _, err := objAPI.GetBucketInfo(ctx, r.OutputLocation.S3.BucketName); err != nil {
return err
}
if r.OutputLocation.S3.Prefix == "" {
return fmt.Errorf("Prefix is a required parameter in OutputLocation")
}
if r.OutputLocation.S3.Encryption.EncryptionType != crypto.SSEAlgorithmAES256 {
return NotImplemented{}
}
}
return nil
}
// set ObjectOptions for PUT call to restore temporary copy of transitioned data
func putRestoreOpts(bucket, object string, rreq *RestoreObjectRequest, objInfo ObjectInfo) (putOpts ObjectOptions) {
meta := make(map[string]string)
sc := rreq.OutputLocation.S3.StorageClass
if sc == "" {
sc = objInfo.StorageClass
}
meta[strings.ToLower(xhttp.AmzStorageClass)] = sc
if rreq.Type == SelectRestoreRequest {
for _, v := range rreq.OutputLocation.S3.UserMetadata {
if !strings.HasPrefix("x-amz-meta", strings.ToLower(v.Name)) {
meta["x-amz-meta-"+v.Name] = v.Value
continue
}
meta[v.Name] = v.Value
}
meta[xhttp.AmzObjectTagging] = rreq.OutputLocation.S3.Tagging.String()
if rreq.OutputLocation.S3.Encryption.EncryptionType != "" {
meta[crypto.SSEHeader] = crypto.SSEAlgorithmAES256
}
return ObjectOptions{
Versioned: globalBucketVersioningSys.Enabled(bucket),
VersionSuspended: globalBucketVersioningSys.Suspended(bucket),
UserDefined: meta,
}
}
for k, v := range objInfo.UserDefined {
meta[k] = v
}
meta[xhttp.AmzObjectTagging] = objInfo.UserTags
return ObjectOptions{
Versioned: globalBucketVersioningSys.Enabled(bucket),
VersionSuspended: globalBucketVersioningSys.Suspended(bucket),
UserDefined: meta,
VersionID: objInfo.VersionID,
MTime: objInfo.ModTime,
Expires: objInfo.Expires,
}
}
var (
errRestoreHDRMissing = fmt.Errorf("x-amz-restore header not found")
errRestoreHDRMalformed = fmt.Errorf("x-amz-restore header malformed")
)
// parse x-amz-restore header from user metadata to get the status of ongoing request and expiry of restoration
// if any. This header value is of format: ongoing-request=true|false, expires=time
func parseRestoreHeaderFromMeta(meta map[string]string) (ongoing bool, expiry time.Time, err error) {
restoreHdr, ok := meta[xhttp.AmzRestore]
if !ok {
return ongoing, expiry, errRestoreHDRMissing
}
rslc := strings.SplitN(restoreHdr, ",", 2)
if len(rslc) != 2 {
return ongoing, expiry, errRestoreHDRMalformed
}
rstatusSlc := strings.SplitN(rslc[0], "=", 2)
if len(rstatusSlc) != 2 {
return ongoing, expiry, errRestoreHDRMalformed
}
rExpSlc := strings.SplitN(rslc[1], "=", 2)
if len(rExpSlc) != 2 {
return ongoing, expiry, errRestoreHDRMalformed
}
expiry, err = time.Parse(http.TimeFormat, rExpSlc[1])
if err != nil {
return
}
return rstatusSlc[1] == "true", expiry, nil
}
// restoreTransitionedObject is similar to PostObjectRestore from AWS GLACIER
// storage class. When PostObjectRestore API is called, a temporary copy of the object
// is restored locally to the bucket on source cluster until the restore expiry date.
// The copy that was transitioned continues to reside in the transitioned tier.
func restoreTransitionedObject(ctx context.Context, bucket, object string, objAPI ObjectLayer, objInfo ObjectInfo, rreq *RestoreObjectRequest, restoreExpiry time.Time) error {
var rs *HTTPRangeSpec
gr, err := getTransitionedObjectReader(ctx, bucket, object, rs, http.Header{}, objInfo, ObjectOptions{
VersionID: objInfo.VersionID})
if err != nil {
return err
}
defer gr.Close()
hashReader, err := hash.NewReader(gr, objInfo.Size, "", "", objInfo.Size, globalCLIContext.StrictS3Compat)
if err != nil {
return err
}
pReader := NewPutObjReader(hashReader, nil, nil)
opts := putRestoreOpts(bucket, object, rreq, objInfo)
opts.UserDefined[xhttp.AmzRestore] = fmt.Sprintf("ongoing-request=%t, expiry-date=%s", false, restoreExpiry.Format(http.TimeFormat))
if _, err := objAPI.PutObject(ctx, bucket, object, pReader, opts); err != nil {
return err
}
return nil
}