mirror of https://github.com/minio/minio.git
547 lines
15 KiB
Go
547 lines
15 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"fmt"
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"net/url"
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"sync"
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"time"
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jsoniter "github.com/json-iterator/go"
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"github.com/minio/madmin-go"
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"github.com/minio/minio-go/v7"
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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/internal/bucket/replication"
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"github.com/minio/minio/internal/crypto"
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"github.com/minio/minio/internal/kms"
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"github.com/minio/minio/internal/logger"
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)
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const (
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defaultHealthCheckDuration = 5 * time.Second
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// default interval for reload of all remote target endpoints
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defaultHealthCheckReloadDuration = 30 * time.Minute
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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]*TargetClient
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targetsMap map[string][]madmin.BucketTarget
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hMutex sync.RWMutex
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hc map[string]epHealth
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hcClient *madmin.AnonymousClient
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}
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// epHealth struct represents health of a replication target endpoint.
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type epHealth struct {
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Endpoint string
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Scheme string
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Online bool
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}
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// isOffline returns current liveness result of remote target. Add endpoint to
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// healthcheck map if missing and default to online status
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func (sys *BucketTargetSys) isOffline(ep *url.URL) bool {
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sys.hMutex.RLock()
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defer sys.hMutex.RUnlock()
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if h, ok := sys.hc[ep.Host]; ok {
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return !h.Online
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}
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go sys.initHC(ep)
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return false
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}
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func (sys *BucketTargetSys) initHC(ep *url.URL) {
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sys.hMutex.Lock()
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sys.hc[ep.Host] = epHealth{
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Endpoint: ep.Host,
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Scheme: ep.Scheme,
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Online: true,
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}
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sys.hMutex.Unlock()
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}
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// newHCClient initializes an anonymous client for performing health check on the remote endpoints
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func newHCClient() *madmin.AnonymousClient {
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clnt, e := madmin.NewAnonymousClientNoEndpoint()
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if e != nil {
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logger.LogOnceIf(GlobalContext, fmt.Errorf("WARNING: Unable to initialize health check client"), string(replicationSubsystem))
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return nil
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}
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clnt.SetCustomTransport(globalRemoteTargetTransport)
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return clnt
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}
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// heartBeat performs liveness check on remote endpoints.
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func (sys *BucketTargetSys) heartBeat(ctx context.Context) {
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hcTimer := time.NewTimer(defaultHealthCheckDuration)
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defer hcTimer.Stop()
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for {
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select {
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case <-hcTimer.C:
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sys.hMutex.RLock()
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var eps []madmin.ServerProperties
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for _, ep := range sys.hc {
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eps = append(eps, madmin.ServerProperties{Endpoint: ep.Endpoint, Scheme: ep.Scheme})
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}
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sys.hMutex.RUnlock()
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if len(eps) > 0 {
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cctx, cancel := context.WithTimeout(ctx, 30*time.Second)
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m := map[string]epHealth{}
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for result := range sys.hcClient.Alive(cctx, madmin.AliveOpts{}, eps...) {
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var online bool
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if result.Error == nil {
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online = result.Online
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}
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m[result.Endpoint.Host] = epHealth{
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Endpoint: result.Endpoint.Host,
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Scheme: result.Endpoint.Scheme,
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Online: online,
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}
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}
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cancel()
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sys.hMutex.Lock()
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sys.hc = m
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sys.hMutex.Unlock()
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}
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hcTimer.Reset(defaultHealthCheckDuration)
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case <-ctx.Done():
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return
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}
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}
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}
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// periodically rebuild the healthcheck map from list of targets to clear
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// out stale endpoints
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func (sys *BucketTargetSys) reloadHealthCheckers(ctx context.Context) {
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m := make(map[string]epHealth)
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tgts := sys.ListTargets(ctx, "", "")
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for _, t := range tgts {
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if _, ok := m[t.Endpoint]; !ok {
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scheme := "http"
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if t.Secure {
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scheme = "https"
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}
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m[t.Endpoint] = epHealth{
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Online: true,
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Endpoint: t.Endpoint,
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Scheme: scheme,
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}
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}
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}
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sys.hMutex.Lock()
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// swap out the map
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sys.hc = m
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sys.hMutex.Unlock()
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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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// Delete clears targets present for a bucket
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func (sys *BucketTargetSys) Delete(bucket string) {
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sys.Lock()
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defer sys.Unlock()
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tgts, ok := sys.targetsMap[bucket]
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if !ok {
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return
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}
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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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delete(sys.targetsMap, 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, update bool) error {
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if !tgt.Type.IsValid() && !update {
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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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// validate if target credentials are ok
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exists, err := clnt.BucketExists(ctx, tgt.TargetBucket)
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if err != nil {
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if minio.ToErrorResponse(err).Code == "NoSuchBucket" {
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return BucketRemoteTargetNotFound{Bucket: tgt.TargetBucket}
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}
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return RemoteTargetConnectionErr{Bucket: tgt.TargetBucket, Err: err}
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}
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if !exists {
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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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return RemoteTargetConnectionErr{Bucket: tgt.TargetBucket, Err: err}
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}
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if !vcfg.Enabled() {
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return BucketRemoteTargetNotVersioned{Bucket: tgt.TargetBucket}
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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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if !update {
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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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}
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newtgts[idx] = t
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}
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if !found && !update {
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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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sys.updateBandwidthLimit(bucket, tgt.BandwidthLimit)
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return nil
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}
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func (sys *BucketTargetSys) updateBandwidthLimit(bucket string, limit int64) {
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if limit == 0 {
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globalBucketMonitor.DeleteBucket(bucket)
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return
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}
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// Setup bandwidth throttling
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globalBucketMonitor.SetBandwidthLimit(bucket, limit)
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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 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 {
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for _, tgtArn := range rcfg.FilterTargetArns(replication.ObjectOpts{OpType: replication.AllReplicationType}) {
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if err == nil && (tgtArn == arnStr || rcfg.RoleArn == arnStr) {
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sys.RLock()
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_, ok := sys.arnRemotesMap[arnStr]
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sys.RUnlock()
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if 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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}
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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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found := false
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tgts, ok := sys.targetsMap[bucket]
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if !ok {
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return BucketRemoteTargetNotFound{Bucket: bucket}
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}
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targets := make([]madmin.BucketTarget, 0, len(tgts))
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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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sys.updateBandwidthLimit(bucket, 0)
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return nil
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}
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// GetRemoteTargetClient returns minio-go client for replication target instance
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func (sys *BucketTargetSys) GetRemoteTargetClient(ctx context.Context, arn string) *TargetClient {
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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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// GetRemoteBucketTargetByArn returns BucketTarget for a ARN
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func (sys *BucketTargetSys) GetRemoteBucketTargetByArn(ctx context.Context, bucket, arn string) madmin.BucketTarget {
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sys.RLock()
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defer sys.RUnlock()
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var tgt madmin.BucketTarget
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for _, t := range sys.targetsMap[bucket] {
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if t.Arn == arn {
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tgt = t.Clone()
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tgt.Credentials = t.Credentials
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return tgt
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}
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}
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return tgt
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}
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// NewBucketTargetSys - creates new replication system.
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func NewBucketTargetSys(ctx context.Context) *BucketTargetSys {
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sys := &BucketTargetSys{
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arnRemotesMap: make(map[string]*TargetClient),
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targetsMap: make(map[string][]madmin.BucketTarget),
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hc: make(map[string]epHealth),
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hcClient: newHCClient(),
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}
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// reload healthcheck endpoints map periodically to remove stale endpoints from the map.
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go func() {
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rTimer := time.NewTimer(defaultHealthCheckReloadDuration)
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defer rTimer.Stop()
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for {
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select {
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case <-rTimer.C:
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sys.reloadHealthCheckers(ctx)
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rTimer.Reset(defaultHealthCheckReloadDuration)
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case <-ctx.Done():
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return
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}
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}
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}()
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go sys.heartBeat(ctx)
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return sys
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}
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// UpdateAllTargets updates target to reflect metadata updates
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func (sys *BucketTargetSys) UpdateAllTargets(bucket string, tgts *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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// Remove existingtarget 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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delete(sys.targetsMap, bucket)
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}
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// No need for more if not adding anything
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if tgts == nil || tgts.Empty() {
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sys.updateBandwidthLimit(bucket, 0)
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return
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}
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if len(tgts.Targets) > 0 {
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sys.targetsMap[bucket] = tgts.Targets
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}
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for _, tgt := range tgts.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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sys.updateBandwidthLimit(bucket, tgt.BandwidthLimit)
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}
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sys.targetsMap[bucket] = tgts.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) set(bucket BucketInfo, meta BucketMetadata) {
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cfg := meta.bucketTargetConfig
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if cfg == nil || cfg.Empty() {
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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 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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logger.LogIf(GlobalContext, err)
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continue
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}
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sys.arnRemotesMap[tgt.Arn] = tgtClient
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sys.updateBandwidthLimit(bucket.Name, tgt.BandwidthLimit)
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}
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sys.targetsMap[bucket.Name] = cfg.Targets
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}
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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) (*TargetClient, error) {
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config := tcfg.Credentials
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creds := credentials.NewStaticV4(config.AccessKey, config.SecretKey, "")
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api, err := minio.New(tcfg.Endpoint, &miniogo.Options{
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Creds: creds,
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Secure: tcfg.Secure,
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Region: tcfg.Region,
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Transport: globalRemoteTargetTransport,
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})
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if err != nil {
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return nil, err
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}
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hcDuration := defaultHealthCheckDuration
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if tcfg.HealthCheckDuration >= 1 { // require minimum health check duration of 1 sec.
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hcDuration = tcfg.HealthCheckDuration
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}
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tc := &TargetClient{
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Client: api,
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healthCheckDuration: hcDuration,
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replicateSync: tcfg.ReplicationSync,
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Bucket: tcfg.TargetBucket,
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StorageClass: tcfg.StorageClass,
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disableProxy: tcfg.DisableProxy,
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ARN: tcfg.Arn,
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ResetID: tcfg.ResetID,
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Endpoint: tcfg.Endpoint,
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Secure: tcfg.Secure,
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}
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return tc, nil
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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().String() == tgt.URL().String() {
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return tgt.Arn
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}
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}
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if !target.Type.IsValid() {
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return ""
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}
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return generateARN(target)
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}
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// generate ARN that is unique to this target type
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func generateARN(t *madmin.BucketTarget) string {
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arn := madmin.ARN{
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Type: t.Type,
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ID: mustGetUUID(),
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Region: t.Region,
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Bucket: t.TargetBucket,
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}
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return arn.String()
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}
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// Returns parsed target config. If KMS is configured, remote target is decrypted
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func parseBucketTargetConfig(bucket string, cdata, cmetadata []byte) (*madmin.BucketTargets, error) {
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var (
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data []byte
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err error
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t madmin.BucketTargets
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meta map[string]string
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)
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if len(cdata) == 0 {
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return nil, nil
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}
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data = cdata
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json := jsoniter.ConfigCompatibleWithStandardLibrary
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if len(cmetadata) != 0 {
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if err := json.Unmarshal(cmetadata, &meta); err != nil {
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return nil, err
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}
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if crypto.S3.IsEncrypted(meta) {
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if data, err = decryptBucketMetadata(cdata, bucket, meta, kms.Context{
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bucket: bucket,
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bucketTargetsFile: bucketTargetsFile,
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}); err != nil {
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return nil, err
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}
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}
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}
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if err = json.Unmarshal(data, &t); err != nil {
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return nil, err
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}
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return &t, nil
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}
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// TargetClient is the struct for remote target client.
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type TargetClient struct {
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*miniogo.Client
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healthCheckDuration time.Duration
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Bucket string // remote bucket target
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replicateSync bool
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StorageClass string // storage class on remote
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disableProxy bool
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ARN string // ARN to uniquely identify remote target
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ResetID string
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Endpoint string
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Secure bool
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}
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