/* * 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" 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 expiryTask struct { objInfo ObjectInfo versionExpiry bool } type expiryState struct { expiryCh chan expiryTask } func (es *expiryState) queueExpiryTask(oi ObjectInfo, rmVersion bool) { select { case es.expiryCh <- expiryTask{objInfo: oi, versionExpiry: rmVersion}: default: } } var ( globalExpiryState *expiryState ) func newExpiryState() *expiryState { es := &expiryState{ expiryCh: make(chan expiryTask, 10000), } go func() { <-GlobalContext.Done() close(es.expiryCh) }() return es } func initBackgroundExpiry(ctx context.Context, objectAPI ObjectLayer) { globalExpiryState = newExpiryState() go func() { for t := range globalExpiryState.expiryCh { applyExpiryRule(ctx, objectAPI, t.objInfo, false, t.versionExpiry) } }() } 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 } if err := transitionObject(ctx, objectAPI, oi); err != nil { logger.LogIf(ctx, err) } } } }() } 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} } if arn.Type != madmin.ILMService { return false, "", BucketRemoteArnTypeInvalid{} } 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, err error) { meta := make(map[string]string) putOpts = miniogo.PutObjectOptions{ UserMetadata: meta, ContentType: objInfo.ContentType, ContentEncoding: objInfo.ContentEncoding, StorageClass: objInfo.StorageClass, Internal: miniogo.AdvancedPutOptions{ SourceVersionID: objInfo.VersionID, SourceMTime: objInfo.ModTime, SourceETag: objInfo.ETag, }, } if objInfo.UserTags != "" { tag, _ := tags.ParseObjectTags(objInfo.UserTags) if tag != nil { putOpts.UserTags = tag.ToMap() } } lkMap := caseInsensitiveMap(objInfo.UserDefined) if lang, ok := lkMap.Lookup(xhttp.ContentLanguage); ok { putOpts.ContentLanguage = lang } if disp, ok := lkMap.Lookup(xhttp.ContentDisposition); ok { putOpts.ContentDisposition = disp } if cc, ok := lkMap.Lookup(xhttp.CacheControl); ok { putOpts.CacheControl = cc } if mode, ok := lkMap.Lookup(xhttp.AmzObjectLockMode); ok { rmode := miniogo.RetentionMode(mode) putOpts.Mode = rmode } if retainDateStr, ok := lkMap.Lookup(xhttp.AmzObjectLockRetainUntilDate); ok { rdate, err := time.Parse(time.RFC3339, retainDateStr) if err != nil { return putOpts, err } putOpts.RetainUntilDate = rdate } if lhold, ok := lkMap.Lookup(xhttp.AmzObjectLockLegalHold); ok { putOpts.LegalHold = miniogo.LegalHoldStatus(lhold) } return putOpts, nil } // 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. // 3. Object is removed through DELETE api call func deleteTransitionedObject(ctx context.Context, objectAPI ObjectLayer, bucket, object string, lcOpts lifecycle.ObjectOpts, restoredObject, isDeleteTierOnly bool) error { if lcOpts.TransitionStatus == "" && !isDeleteTierOnly { 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 = lcOpts.VersionID if restoredObject { // 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 = lcOpts.TransitionStatus _, err = objectAPI.DeleteObject(ctx, bucket, object, opts) return err } // When an object is past expiry, delete the data from transitioned tier and // metadata from source if err := tgt.RemoveObject(context.Background(), arn.Bucket, object, miniogo.RemoveObjectOptions{VersionID: lcOpts.VersionID}); err != nil { logger.LogIf(ctx, err) } if isDeleteTierOnly { return nil } objInfo, err := objectAPI.DeleteObject(ctx, bucket, object, opts) if err != nil { return err } eventName := event.ObjectRemovedDelete if lcOpts.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 { gr.Close() return nil } putOpts, err := putTransitionOpts(oi) if err != nil { gr.Close() return err } if _, err = tgt.PutObject(ctx, arn.Bucket, oi.Name, gr, oi.Size, putOpts); err != nil { gr.Close() return err } gr.Close() var opts ObjectOptions opts.Versioned = globalBucketVersioningSys.Enabled(oi.Bucket) opts.VersionID = oi.VersionID opts.TransitionStatus = lifecycle.TransitionComplete eventName := event.ObjectTransitionComplete objInfo, err = objectAPI.DeleteObject(ctx, oi.Bucket, oi.Name, opts) if err != nil { eventName = event.ObjectTransitionFailed } // Notify object deleted event. sendEvent(eventArgs{ EventName: eventName, BucketName: objInfo.Bucket, Object: objInfo, Host: "Internal: [ILM-Transition]", }) return err } // 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 != xhttp.AmzEncryptionAES { 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[xhttp.AmzServerSideEncryption] = xhttp.AmzEncryptionAES } 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 }