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312 lines
8.7 KiB
312 lines
8.7 KiB
/*
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* MinIO Cloud Storage, (C) 2020 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"net/http"
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"sync"
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miniogo "github.com/minio/minio-go/v7"
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"github.com/minio/minio-go/v7/pkg/credentials"
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"github.com/minio/minio/pkg/bucket/versioning"
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"github.com/minio/minio/pkg/madmin"
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)
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// BucketTargetSys represents bucket targets subsystem
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type BucketTargetSys struct {
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sync.RWMutex
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arnRemotesMap map[string]*miniogo.Core
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targetsMap map[string][]madmin.BucketTarget
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clientsCache map[string]*miniogo.Core
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}
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// ListTargets lists bucket targets across tenant or for individual bucket, and returns
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// results filtered by arnType
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func (sys *BucketTargetSys) ListTargets(ctx context.Context, bucket, arnType string) (targets []madmin.BucketTarget) {
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if bucket != "" {
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if ts, err := sys.ListBucketTargets(ctx, bucket); err == nil {
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for _, t := range ts.Targets {
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if string(t.Type) == arnType || arnType == "" {
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targets = append(targets, t.Clone())
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}
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}
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}
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return targets
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}
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sys.RLock()
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defer sys.RUnlock()
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for _, tgts := range sys.targetsMap {
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for _, t := range tgts {
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if string(t.Type) == arnType || arnType == "" {
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targets = append(targets, t.Clone())
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}
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}
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}
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return
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}
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// ListBucketTargets - gets list of bucket targets for this bucket.
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func (sys *BucketTargetSys) ListBucketTargets(ctx context.Context, bucket string) (*madmin.BucketTargets, error) {
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sys.RLock()
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defer sys.RUnlock()
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tgts, ok := sys.targetsMap[bucket]
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if ok {
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return &madmin.BucketTargets{Targets: tgts}, nil
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}
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return nil, BucketRemoteTargetNotFound{Bucket: bucket}
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}
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// SetTarget - sets a new minio-go client target for this bucket.
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func (sys *BucketTargetSys) SetTarget(ctx context.Context, bucket string, tgt *madmin.BucketTarget) error {
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if globalIsGateway {
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return nil
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}
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if !tgt.Type.IsValid() {
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return BucketRemoteArnTypeInvalid{Bucket: bucket}
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}
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clnt, err := sys.getRemoteTargetClient(tgt)
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if err != nil {
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return BucketRemoteTargetNotFound{Bucket: tgt.TargetBucket}
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}
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if tgt.Type == madmin.ReplicationService {
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if !globalBucketVersioningSys.Enabled(bucket) {
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return BucketReplicationSourceNotVersioned{Bucket: bucket}
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}
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vcfg, err := clnt.GetBucketVersioning(ctx, tgt.TargetBucket)
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if err != nil {
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if isErrBucketNotFound(err) {
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return BucketRemoteTargetNotFound{Bucket: tgt.TargetBucket}
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}
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if vcfg.Status != string(versioning.Enabled) {
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return BucketReplicationTargetNotVersioned{Bucket: tgt.TargetBucket}
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}
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return err
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}
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}
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sys.Lock()
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defer sys.Unlock()
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tgts := sys.targetsMap[bucket]
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newtgts := make([]madmin.BucketTarget, len(tgts))
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found := false
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for idx, t := range tgts {
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if t.Type == tgt.Type {
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if t.Arn == tgt.Arn {
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return BucketRemoteAlreadyExists{Bucket: t.TargetBucket}
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}
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newtgts[idx] = *tgt
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found = true
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continue
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}
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newtgts[idx] = t
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}
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if !found {
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newtgts = append(newtgts, *tgt)
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}
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sys.targetsMap[bucket] = newtgts
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sys.arnRemotesMap[tgt.Arn] = clnt
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if _, ok := sys.clientsCache[clnt.EndpointURL().String()]; !ok {
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sys.clientsCache[clnt.EndpointURL().String()] = clnt
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}
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return nil
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}
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// RemoveTarget - removes a remote bucket target for this source bucket.
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func (sys *BucketTargetSys) RemoveTarget(ctx context.Context, bucket, arnStr string) error {
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if globalIsGateway {
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return nil
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}
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if arnStr == "" {
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return BucketRemoteArnInvalid{Bucket: bucket}
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}
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arn, err := madmin.ParseARN(arnStr)
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if err != nil {
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return BucketRemoteArnInvalid{Bucket: bucket}
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}
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if arn.Type == madmin.ReplicationService {
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// reject removal of remote target if replication configuration is present
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rcfg, err := getReplicationConfig(ctx, bucket)
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if err == nil && rcfg.RoleArn == arnStr {
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if _, ok := sys.arnRemotesMap[arnStr]; ok {
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return BucketRemoteRemoveDisallowed{Bucket: bucket}
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}
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}
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}
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// delete ARN type from list of matching targets
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sys.Lock()
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defer sys.Unlock()
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targets := make([]madmin.BucketTarget, 0)
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found := false
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tgts := sys.targetsMap[bucket]
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for _, tgt := range tgts {
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if tgt.Arn != arnStr {
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targets = append(targets, tgt)
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continue
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}
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found = true
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}
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if !found {
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return BucketRemoteTargetNotFound{Bucket: bucket}
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}
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sys.targetsMap[bucket] = targets
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delete(sys.arnRemotesMap, arnStr)
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return nil
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}
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// GetReplicationTargetClient returns minio-go client for replication target instance
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func (sys *BucketTargetSys) GetReplicationTargetClient(ctx context.Context, arn string) *miniogo.Core {
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sys.RLock()
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defer sys.RUnlock()
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return sys.arnRemotesMap[arn]
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}
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// NewBucketTargetSys - creates new replication system.
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func NewBucketTargetSys() *BucketTargetSys {
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return &BucketTargetSys{
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arnRemotesMap: make(map[string]*miniogo.Core),
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targetsMap: make(map[string][]madmin.BucketTarget),
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clientsCache: make(map[string]*miniogo.Core),
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}
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}
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// Init initializes the bucket targets subsystem for buckets which have targets configured.
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func (sys *BucketTargetSys) Init(ctx context.Context, buckets []BucketInfo, objAPI ObjectLayer) error {
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if objAPI == nil {
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return errServerNotInitialized
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}
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// In gateway mode, bucket targets is not supported.
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if globalIsGateway {
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return nil
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}
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// Load bucket targets once during boot in background.
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go sys.load(ctx, buckets, objAPI)
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return nil
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}
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// UpdateTarget updates target to reflect metadata updates
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func (sys *BucketTargetSys) UpdateTarget(bucket string, cfg *madmin.BucketTargets) {
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if sys == nil {
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return
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}
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sys.Lock()
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defer sys.Unlock()
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if cfg == nil || cfg.Empty() {
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// remove target and arn association
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if tgts, ok := sys.targetsMap[bucket]; ok {
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for _, t := range tgts {
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delete(sys.arnRemotesMap, t.Arn)
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}
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}
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delete(sys.targetsMap, bucket)
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return
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}
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if len(cfg.Targets) > 0 {
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sys.targetsMap[bucket] = cfg.Targets
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}
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for _, tgt := range cfg.Targets {
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tgtClient, err := sys.getRemoteTargetClient(&tgt)
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if err != nil {
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continue
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}
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sys.arnRemotesMap[tgt.Arn] = tgtClient
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if _, ok := sys.clientsCache[tgtClient.EndpointURL().String()]; !ok {
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sys.clientsCache[tgtClient.EndpointURL().String()] = tgtClient
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}
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}
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sys.targetsMap[bucket] = cfg.Targets
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}
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// create minio-go clients for buckets having remote targets
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func (sys *BucketTargetSys) load(ctx context.Context, buckets []BucketInfo, objAPI ObjectLayer) {
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for _, bucket := range buckets {
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cfg, err := globalBucketMetadataSys.GetBucketTargetsConfig(bucket.Name)
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if err != nil {
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continue
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}
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if cfg == nil || cfg.Empty() {
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continue
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}
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if len(cfg.Targets) > 0 {
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sys.targetsMap[bucket.Name] = cfg.Targets
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}
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for _, tgt := range cfg.Targets {
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tgtClient, err := sys.getRemoteTargetClient(&tgt)
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if err != nil {
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continue
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}
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sys.arnRemotesMap[tgt.Arn] = tgtClient
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if _, ok := sys.clientsCache[tgtClient.EndpointURL().String()]; !ok {
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sys.clientsCache[tgtClient.EndpointURL().String()] = tgtClient
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}
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}
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sys.targetsMap[bucket.Name] = cfg.Targets
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}
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}
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// getRemoteTargetInstanceTransport contains a singleton roundtripper.
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var getRemoteTargetInstanceTransport http.RoundTripper
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var getRemoteTargetInstanceTransportOnce sync.Once
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// Returns a minio-go Client configured to access remote host described in replication target config.
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func (sys *BucketTargetSys) getRemoteTargetClient(tcfg *madmin.BucketTarget) (*miniogo.Core, error) {
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if clnt, ok := sys.clientsCache[tcfg.Endpoint]; ok {
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return clnt, nil
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}
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config := tcfg.Credentials
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creds := credentials.NewStaticV4(config.AccessKey, config.SecretKey, "")
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getRemoteTargetInstanceTransportOnce.Do(func() {
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getRemoteTargetInstanceTransport = NewGatewayHTTPTransport()
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})
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core, err := miniogo.NewCore(tcfg.Endpoint, &miniogo.Options{
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Creds: creds,
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Secure: tcfg.Secure,
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Transport: getRemoteTargetInstanceTransport,
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})
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return core, err
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}
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// getRemoteARN gets existing ARN for an endpoint or generates a new one.
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func (sys *BucketTargetSys) getRemoteARN(bucket string, target *madmin.BucketTarget) string {
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if target == nil {
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return ""
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}
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tgts := sys.targetsMap[bucket]
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for _, tgt := range tgts {
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if tgt.Type == target.Type && tgt.TargetBucket == target.TargetBucket && target.URL() == tgt.URL() {
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return tgt.Arn
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}
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}
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if !madmin.ServiceType(target.Type).IsValid() {
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return ""
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}
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arn := madmin.ARN{
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Type: target.Type,
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ID: mustGetUUID(),
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Region: target.Region,
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Bucket: target.TargetBucket,
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}
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return arn.String()
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}
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