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Add support for multi site replication (#12880)
This commit is contained in:
Poorna Krishnamoorthy
committed by
GitHub
GitHub
parent
0b8c5a6872
commit
c4373ef290
602
cmd/bucket-replication-utils.go
Normal file
602
cmd/bucket-replication-utils.go
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@@ -0,0 +1,602 @@
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// 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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"bytes"
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"fmt"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/minio/minio/internal/bucket/replication"
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)
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//go:generate msgp -file=$GOFILE
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// replicatedTargetInfo struct represents replication info on a target
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type replicatedTargetInfo struct {
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Arn string
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Size int64
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ReplicationAction replicationAction // full or metadata only
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OpType replication.Type // whether incoming replication, existing object, healing etc..
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ReplicationStatus replication.StatusType
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PrevReplicationStatus replication.StatusType
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VersionPurgeStatus VersionPurgeStatusType
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ResyncTimestamp string
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ReplicationResynced bool // true only if resync attempted for this target
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}
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// Empty returns true for a target if arn is empty
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func (rt replicatedTargetInfo) Empty() bool {
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return rt.Arn == ""
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}
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type replicatedInfos struct {
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ReplicationTimeStamp time.Time
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Targets []replicatedTargetInfo
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}
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func (ri replicatedInfos) CompletedSize() (sz int64) {
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for _, t := range ri.Targets {
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if t.Empty() {
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continue
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}
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if t.ReplicationStatus == replication.Completed && t.PrevReplicationStatus != replication.Completed {
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sz += t.Size
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}
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}
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return sz
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}
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// ReplicationAttempted returns true if replication was attempted on any of the targets for the object version
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// queued
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func (ri replicatedInfos) ReplicationResynced() bool {
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for _, t := range ri.Targets {
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if t.Empty() || !t.ReplicationResynced {
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continue
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}
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return true
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}
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return false
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}
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func (ri replicatedInfos) ReplicationStatusInternal() string {
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b := new(bytes.Buffer)
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for _, t := range ri.Targets {
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if t.Empty() {
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continue
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}
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fmt.Fprintf(b, "%s=%s;", t.Arn, t.ReplicationStatus.String())
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}
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return b.String()
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}
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func (ri replicatedInfos) ReplicationStatus() replication.StatusType {
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if len(ri.Targets) == 0 {
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return replication.StatusType("")
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}
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completed := 0
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for _, v := range ri.Targets {
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switch v.ReplicationStatus {
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case replication.Failed:
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return replication.Failed
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case replication.Completed:
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completed++
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}
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}
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if completed == len(ri.Targets) {
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return replication.Completed
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}
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return replication.Pending
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}
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func (ri replicatedInfos) VersionPurgeStatus() VersionPurgeStatusType {
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if len(ri.Targets) == 0 {
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return VersionPurgeStatusType("")
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}
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completed := 0
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for _, v := range ri.Targets {
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switch v.VersionPurgeStatus {
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case Failed:
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return Failed
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case Complete:
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completed++
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}
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}
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if completed == len(ri.Targets) {
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return Complete
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}
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return Pending
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}
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func (ri replicatedInfos) VersionPurgeStatusInternal() string {
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b := new(bytes.Buffer)
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for _, t := range ri.Targets {
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if t.Empty() {
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continue
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}
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if t.VersionPurgeStatus.Empty() {
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continue
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}
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fmt.Fprintf(b, "%s=%s;", t.Arn, t.VersionPurgeStatus)
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}
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return b.String()
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}
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func (ri replicatedInfos) Action() replicationAction {
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for _, t := range ri.Targets {
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if t.Empty() {
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continue
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}
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// rely on replication action from target that actually performed replication now.
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if t.PrevReplicationStatus != replication.Completed {
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return t.ReplicationAction
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}
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}
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return replicateNone
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}
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var replStatusRegex = regexp.MustCompile(`([^=].*?)=([^,].*?);`)
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// TargetReplicationStatus - returns replication status of a target
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func (o *ObjectInfo) TargetReplicationStatus(arn string) (status replication.StatusType) {
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repStatMatches := replStatusRegex.FindAllStringSubmatch(o.ReplicationStatusInternal, -1)
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for _, repStatMatch := range repStatMatches {
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if len(repStatMatch) != 3 {
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return
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}
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if repStatMatch[1] == arn {
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return replication.StatusType(repStatMatch[2])
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}
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}
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return
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}
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type replicateTargetDecision struct {
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Replicate bool // Replicate to this target
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Synchronous bool // Synchronous replication configured.
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Arn string //ARN of replication target
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ID string
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}
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func (t *replicateTargetDecision) String() string {
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return fmt.Sprintf("%t;%t;%s;%s", t.Replicate, t.Synchronous, t.Arn, t.ID)
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}
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func newReplicateTargetDecision(arn string, replicate bool, sync bool) replicateTargetDecision {
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d := replicateTargetDecision{
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Replicate: replicate,
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Synchronous: sync,
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Arn: arn,
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}
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return d
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}
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// ReplicateDecision represents replication decision for each target
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type ReplicateDecision struct {
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targetsMap map[string]replicateTargetDecision
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}
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// ReplicateAny returns true if atleast one target qualifies for replication
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func (d *ReplicateDecision) ReplicateAny() bool {
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for _, t := range d.targetsMap {
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if t.Replicate {
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return true
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}
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}
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return false
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}
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// Synchronous returns true if atleast one target qualifies for synchronous replication
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func (d *ReplicateDecision) Synchronous() bool {
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for _, t := range d.targetsMap {
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if t.Synchronous {
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return true
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}
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}
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return false
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}
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func (d *ReplicateDecision) String() string {
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b := new(bytes.Buffer)
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for key, value := range d.targetsMap {
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fmt.Fprintf(b, "%s=%s,", key, value.String())
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}
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return strings.TrimSuffix(b.String(), ",")
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}
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// Set updates ReplicateDecision with target's replication decision
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func (d *ReplicateDecision) Set(t replicateTargetDecision) {
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if d.targetsMap == nil {
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d.targetsMap = make(map[string]replicateTargetDecision)
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}
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d.targetsMap[t.Arn] = t
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}
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// PendingStatus returns a stringified representation of internal replication status with all targets marked as `PENDING`
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func (d *ReplicateDecision) PendingStatus() string {
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b := new(bytes.Buffer)
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for _, k := range d.targetsMap {
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if k.Replicate {
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fmt.Fprintf(b, "%s=%s;", k.Arn, replication.Pending.String())
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}
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}
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return b.String()
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}
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// ResyncDecision is a struct representing a map with target's individual resync decisions
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type ResyncDecision struct {
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targets map[string]ResyncTargetDecision
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}
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// Empty returns true if no targets with resync decision present
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func (r *ResyncDecision) Empty() bool {
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return r.targets == nil
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}
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func (r *ResyncDecision) mustResync() bool {
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for _, v := range r.targets {
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if v.Replicate {
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return true
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}
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}
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return false
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}
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func (r *ResyncDecision) mustResyncTarget(tgtArn string) bool {
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if r.targets == nil {
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return false
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}
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v, ok := r.targets[tgtArn]
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if ok && v.Replicate {
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return true
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}
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return false
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}
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// ResyncTargetDecision is struct that represents resync decision for this target
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type ResyncTargetDecision struct {
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Replicate bool
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ResetID string
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ResetBeforeDate time.Time
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}
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var errInvalidReplicateDecisionFormat = fmt.Errorf("ReplicateDecision has invalid format")
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// parse k-v pairs of target ARN to stringified ReplicateTargetDecision delimited by ',' into a
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// ReplicateDecision struct
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func parseReplicateDecision(s string) (r ReplicateDecision, err error) {
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r = ReplicateDecision{
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targetsMap: make(map[string]replicateTargetDecision),
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}
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if len(s) == 0 {
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return
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}
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pairs := strings.Split(s, ",")
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for _, p := range pairs {
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slc := strings.Split(p, "=")
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if len(slc) != 2 {
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return r, errInvalidReplicateDecisionFormat
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}
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tgtStr := strings.TrimPrefix(slc[1], "\"")
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tgtStr = strings.TrimSuffix(tgtStr, "\"")
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tgt := strings.Split(tgtStr, ";")
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if len(tgt) != 4 {
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return r, errInvalidReplicateDecisionFormat
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}
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var replicate, sync bool
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var err error
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replicate, err = strconv.ParseBool(tgt[0])
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if err != nil {
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return r, err
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}
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sync, err = strconv.ParseBool(tgt[1])
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if err != nil {
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return r, err
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}
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r.targetsMap[slc[0]] = replicateTargetDecision{Replicate: replicate, Synchronous: sync, Arn: tgt[2], ID: tgt[3]}
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}
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return
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}
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// ReplicationState represents internal replication state
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type ReplicationState struct {
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ReplicaTimeStamp time.Time // timestamp when last replica update was received
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ReplicaStatus replication.StatusType // replica statusstringis
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DeleteMarker bool // represents DeleteMarker replication state
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ReplicationTimeStamp time.Time // timestamp when last replication activity happened
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ReplicationStatusInternal string // stringified representation of all replication activity
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// VersionPurgeStatusInternal is internally in the format "arn1=PENDING;arn2=COMMPLETED;"
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VersionPurgeStatusInternal string // stringified representation of all version purge statuses
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ReplicateDecisionStr string // stringified representation of replication decision for each target
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Targets map[string]replication.StatusType // map of ARN->replication status for ongoing replication activity
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PurgeTargets map[string]VersionPurgeStatusType // map of ARN->VersionPurgeStatus for all the targets
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ResetStatusesMap map[string]string // map of ARN-> stringified reset id and timestamp for all the targets
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}
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// Equal returns true if replication state is identical for version purge statuses and (replica)tion statuses.
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func (rs *ReplicationState) Equal(o ReplicationState) bool {
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return rs.ReplicaStatus == o.ReplicaStatus &&
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rs.ReplicaTimeStamp.Equal(o.ReplicaTimeStamp) &&
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rs.ReplicationTimeStamp.Equal(o.ReplicationTimeStamp) &&
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rs.ReplicationStatusInternal == o.ReplicationStatusInternal &&
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rs.VersionPurgeStatusInternal == o.VersionPurgeStatusInternal
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}
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// CompositeReplicationStatus returns overall replication status for the object version being replicated.
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func (rs *ReplicationState) CompositeReplicationStatus() (st replication.StatusType) {
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switch {
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case rs.ReplicationStatusInternal != "":
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switch replication.StatusType(rs.ReplicationStatusInternal) {
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case replication.Pending, replication.Completed, replication.Failed, replication.Replica: // for backward compatibility
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return replication.StatusType(rs.ReplicationStatusInternal)
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default:
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replStatus := getCompositeReplicationStatus(rs.Targets)
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// return REPLICA status if replica received timestamp is later than replication timestamp
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// provided object replication completed for all targets.
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if !rs.ReplicaTimeStamp.Equal(timeSentinel) && replStatus == replication.Completed && rs.ReplicaTimeStamp.After(rs.ReplicationTimeStamp) {
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return rs.ReplicaStatus
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}
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return replStatus
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}
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case !rs.ReplicaStatus.Empty():
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return rs.ReplicaStatus
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default:
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return
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}
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}
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// CompositeVersionPurgeStatus returns overall replication purge status for the permanent delete being replicated.
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func (rs *ReplicationState) CompositeVersionPurgeStatus() VersionPurgeStatusType {
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switch VersionPurgeStatusType(rs.VersionPurgeStatusInternal) {
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case Pending, Complete, Failed: // for backward compatibility
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return VersionPurgeStatusType(rs.VersionPurgeStatusInternal)
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default:
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return getCompositeVersionPurgeStatus(rs.PurgeTargets)
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}
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}
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// TargetState returns replicatedInfos struct initialized with the previous state of replication
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func (rs *ReplicationState) targetState(arn string) (r replicatedTargetInfo) {
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return replicatedTargetInfo{
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Arn: arn,
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PrevReplicationStatus: rs.Targets[arn],
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VersionPurgeStatus: rs.PurgeTargets[arn],
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ResyncTimestamp: rs.ResetStatusesMap[arn],
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}
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}
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// getReplicationState returns replication state using target replicated info for the targets
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func getReplicationState(rinfos replicatedInfos, prevState ReplicationState, vID string) ReplicationState {
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rs := ReplicationState{
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ReplicateDecisionStr: prevState.ReplicateDecisionStr,
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ResetStatusesMap: prevState.ResetStatusesMap,
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ReplicaTimeStamp: prevState.ReplicaTimeStamp,
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ReplicaStatus: prevState.ReplicaStatus,
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}
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var replStatuses, vpurgeStatuses string
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replStatuses = rinfos.ReplicationStatusInternal()
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rs.Targets = replicationStatusesMap(replStatuses)
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rs.ReplicationStatusInternal = replStatuses
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rs.ReplicationTimeStamp = rinfos.ReplicationTimeStamp
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vpurgeStatuses = rinfos.VersionPurgeStatusInternal()
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rs.VersionPurgeStatusInternal = vpurgeStatuses
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rs.PurgeTargets = versionPurgeStatusesMap(vpurgeStatuses)
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for _, rinfo := range rinfos.Targets {
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if rinfo.ResyncTimestamp != "" {
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rs.ResetStatusesMap[targetResetHeader(rinfo.Arn)] = rinfo.ResyncTimestamp
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}
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}
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return rs
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}
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// constructs a replication status map from string representation
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func replicationStatusesMap(s string) map[string]replication.StatusType {
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targets := make(map[string]replication.StatusType)
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repStatMatches := replStatusRegex.FindAllStringSubmatch(s, -1)
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for _, repStatMatch := range repStatMatches {
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if len(repStatMatch) != 3 {
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continue
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}
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status := replication.StatusType(repStatMatch[2])
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targets[repStatMatch[1]] = status
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}
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return targets
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}
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// constructs a version purge status map from string representation
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func versionPurgeStatusesMap(s string) map[string]VersionPurgeStatusType {
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targets := make(map[string]VersionPurgeStatusType)
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purgeStatusMatches := replStatusRegex.FindAllStringSubmatch(s, -1)
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for _, purgeStatusMatch := range purgeStatusMatches {
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if len(purgeStatusMatch) != 3 {
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continue
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}
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targets[purgeStatusMatch[1]] = VersionPurgeStatusType(purgeStatusMatch[2])
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}
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return targets
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}
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// return the overall replication status for all the targets
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func getCompositeReplicationStatus(m map[string]replication.StatusType) replication.StatusType {
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if len(m) == 0 {
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return replication.StatusType("")
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}
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completed := 0
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for _, v := range m {
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switch v {
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case replication.Failed:
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return replication.Failed
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case replication.Completed:
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completed++
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}
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}
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if completed == len(m) {
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return replication.Completed
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}
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return replication.Pending
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}
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// return the overall version purge status for all the targets
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func getCompositeVersionPurgeStatus(m map[string]VersionPurgeStatusType) VersionPurgeStatusType {
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if len(m) == 0 {
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return VersionPurgeStatusType("")
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}
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completed := 0
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for _, v := range m {
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switch v {
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case Failed:
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return Failed
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case Complete:
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completed++
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}
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}
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if completed == len(m) {
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return Complete
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}
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return Pending
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}
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// getHealReplicateObjectInfo returns info needed by heal replication in ReplicateObjectInfo
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func getHealReplicateObjectInfo(objInfo ObjectInfo, rcfg replicationConfig) ReplicateObjectInfo {
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oi := objInfo.Clone()
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if rcfg.Config != nil && rcfg.Config.RoleArn != "" {
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// For backward compatibility of objects pending/failed replication.
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// Save replication related statuses in the new internal representation for
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// compatible behavior.
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if !oi.ReplicationStatus.Empty() {
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oi.ReplicationStatusInternal = fmt.Sprintf("%s=%s;", rcfg.Config.RoleArn, oi.ReplicationStatus)
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}
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if !oi.VersionPurgeStatus.Empty() {
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||||
oi.VersionPurgeStatusInternal = fmt.Sprintf("%s=%s;", rcfg.Config.RoleArn, oi.VersionPurgeStatus)
|
||||
}
|
||||
for k, v := range oi.UserDefined {
|
||||
switch {
|
||||
case strings.EqualFold(k, ReservedMetadataPrefixLower+ReplicationReset):
|
||||
delete(oi.UserDefined, k)
|
||||
oi.UserDefined[targetResetHeader(rcfg.Config.RoleArn)] = v
|
||||
}
|
||||
}
|
||||
}
|
||||
var dsc ReplicateDecision
|
||||
var tgtStatuses map[string]replication.StatusType
|
||||
if oi.DeleteMarker {
|
||||
dsc = checkReplicateDelete(GlobalContext, oi.Bucket, ObjectToDelete{
|
||||
ObjectName: oi.Name,
|
||||
VersionID: oi.VersionID,
|
||||
}, oi, ObjectOptions{}, nil)
|
||||
} else {
|
||||
dsc = mustReplicate(GlobalContext, oi.Bucket, oi.Name, getMustReplicateOptions(ObjectInfo{
|
||||
UserDefined: oi.UserDefined,
|
||||
}, replication.HealReplicationType, ObjectOptions{}))
|
||||
}
|
||||
tgtStatuses = replicationStatusesMap(oi.ReplicationStatusInternal)
|
||||
|
||||
existingObjResync := rcfg.Resync(GlobalContext, oi, &dsc, tgtStatuses)
|
||||
|
||||
return ReplicateObjectInfo{
|
||||
ObjectInfo: oi,
|
||||
OpType: replication.HealReplicationType,
|
||||
Dsc: dsc,
|
||||
ExistingObjResync: existingObjResync,
|
||||
TargetStatuses: tgtStatuses,
|
||||
}
|
||||
}
|
||||
|
||||
// vID here represents the versionID client specified in request - need to distinguish between delete marker and delete marker deletion
|
||||
func (o *ObjectInfo) getReplicationState(dsc string, vID string, heal bool) ReplicationState {
|
||||
rs := ReplicationState{
|
||||
ReplicationStatusInternal: o.ReplicationStatusInternal,
|
||||
VersionPurgeStatusInternal: o.VersionPurgeStatusInternal,
|
||||
ReplicateDecisionStr: dsc,
|
||||
Targets: make(map[string]replication.StatusType),
|
||||
PurgeTargets: make(map[string]VersionPurgeStatusType),
|
||||
ResetStatusesMap: make(map[string]string),
|
||||
}
|
||||
rs.Targets = replicationStatusesMap(o.ReplicationStatusInternal)
|
||||
rs.PurgeTargets = versionPurgeStatusesMap(o.VersionPurgeStatusInternal)
|
||||
for k, v := range o.UserDefined {
|
||||
if strings.HasPrefix(k, ReservedMetadataPrefixLower+ReplicationReset) {
|
||||
arn := strings.TrimPrefix(k, fmt.Sprintf("%s-", ReservedMetadataPrefixLower+ReplicationReset))
|
||||
rs.ResetStatusesMap[arn] = v
|
||||
}
|
||||
}
|
||||
return rs
|
||||
}
|
||||
|
||||
// ReplicationState returns replication state using other internal replication metadata in ObjectToDelete
|
||||
func (o *ObjectToDelete) ReplicationState() ReplicationState {
|
||||
r := ReplicationState{
|
||||
ReplicationStatusInternal: o.DeleteMarkerReplicationStatus,
|
||||
VersionPurgeStatusInternal: o.VersionPurgeStatuses,
|
||||
ReplicateDecisionStr: o.ReplicateDecisionStr,
|
||||
}
|
||||
|
||||
r.Targets = replicationStatusesMap(o.DeleteMarkerReplicationStatus)
|
||||
r.PurgeTargets = versionPurgeStatusesMap(o.VersionPurgeStatuses)
|
||||
return r
|
||||
}
|
||||
|
||||
// VersionPurgeStatus returns a composite version purge status across targets
|
||||
func (d *DeletedObject) VersionPurgeStatus() VersionPurgeStatusType {
|
||||
return d.ReplicationState.CompositeVersionPurgeStatus()
|
||||
}
|
||||
|
||||
// DeleteMarkerReplicationStatus return composite replication status of delete marker across targets
|
||||
func (d *DeletedObject) DeleteMarkerReplicationStatus() replication.StatusType {
|
||||
return d.ReplicationState.CompositeReplicationStatus()
|
||||
}
|
||||
|
||||
// ResyncTargetsInfo holds a slice of targets with resync info per target
|
||||
type ResyncTargetsInfo struct {
|
||||
Targets []ResyncTarget `json:"target,omitempty"`
|
||||
}
|
||||
|
||||
// ResyncTarget is a struct representing the Target reset ID where target is identified by its Arn
|
||||
type ResyncTarget struct {
|
||||
Arn string `json:"arn"`
|
||||
ResetID string `json:"resetid"`
|
||||
}
|
||||
|
||||
// VersionPurgeStatusType represents status of a versioned delete or permanent delete w.r.t bucket replication
|
||||
type VersionPurgeStatusType string
|
||||
|
||||
const (
|
||||
// Pending - versioned delete replication is pending.
|
||||
Pending VersionPurgeStatusType = "PENDING"
|
||||
|
||||
// Complete - versioned delete replication is now complete, erase version on disk.
|
||||
Complete VersionPurgeStatusType = "COMPLETE"
|
||||
|
||||
// Failed - versioned delete replication failed.
|
||||
Failed VersionPurgeStatusType = "FAILED"
|
||||
)
|
||||
|
||||
// Empty returns true if purge status was not set.
|
||||
func (v VersionPurgeStatusType) Empty() bool {
|
||||
return string(v) == ""
|
||||
}
|
||||
|
||||
// Pending returns true if the version is pending purge.
|
||||
func (v VersionPurgeStatusType) Pending() bool {
|
||||
return v == Pending || v == Failed
|
||||
}
|
||||
Reference in New Issue
Block a user