mirror of https://github.com/minio/minio.git
945 lines
26 KiB
Go
945 lines
26 KiB
Go
// Copyright (c) 2015-2022 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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"encoding/binary"
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"errors"
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"fmt"
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"io"
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"math"
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"math/rand"
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"net/http"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/lithammer/shortuuid/v4"
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"github.com/minio/madmin-go/v3"
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"github.com/minio/minio/internal/hash"
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xioutil "github.com/minio/minio/internal/ioutil"
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"github.com/minio/minio/internal/logger"
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"github.com/minio/pkg/v2/env"
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)
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//go:generate msgp -file $GOFILE -unexported
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// rebalanceStats contains per-pool rebalance statistics like number of objects,
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// versions and bytes rebalanced out of a pool
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type rebalanceStats struct {
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InitFreeSpace uint64 `json:"initFreeSpace" msg:"ifs"` // Pool free space at the start of rebalance
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InitCapacity uint64 `json:"initCapacity" msg:"ic"` // Pool capacity at the start of rebalance
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Buckets []string `json:"buckets" msg:"bus"` // buckets being rebalanced or to be rebalanced
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RebalancedBuckets []string `json:"rebalancedBuckets" msg:"rbs"` // buckets rebalanced
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Bucket string `json:"bucket" msg:"bu"` // Last rebalanced bucket
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Object string `json:"object" msg:"ob"` // Last rebalanced object
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NumObjects uint64 `json:"numObjects" msg:"no"` // Number of objects rebalanced
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NumVersions uint64 `json:"numVersions" msg:"nv"` // Number of versions rebalanced
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Bytes uint64 `json:"bytes" msg:"bs"` // Number of bytes rebalanced
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Participating bool `json:"participating" msg:"par"`
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Info rebalanceInfo `json:"info" msg:"inf"`
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}
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func (rs *rebalanceStats) update(bucket string, fi FileInfo) {
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if fi.IsLatest {
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rs.NumObjects++
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}
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rs.NumVersions++
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onDiskSz := int64(0)
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if !fi.Deleted {
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onDiskSz = fi.Size * int64(fi.Erasure.DataBlocks+fi.Erasure.ParityBlocks) / int64(fi.Erasure.DataBlocks)
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}
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rs.Bytes += uint64(onDiskSz)
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rs.Bucket = bucket
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rs.Object = fi.Name
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}
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type rstats []*rebalanceStats
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//go:generate stringer -type=rebalStatus -trimprefix=rebal $GOFILE
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type rebalStatus uint8
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const (
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rebalNone rebalStatus = iota
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rebalStarted
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rebalCompleted
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rebalStopped
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rebalFailed
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)
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type rebalanceInfo struct {
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StartTime time.Time `msg:"startTs"` // Time at which rebalance-start was issued
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EndTime time.Time `msg:"stopTs"` // Time at which rebalance operation completed or rebalance-stop was called
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Status rebalStatus `msg:"status"` // Current state of rebalance operation. One of Started|Stopped|Completed|Failed.
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}
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// rebalanceMeta contains information pertaining to an ongoing rebalance operation.
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type rebalanceMeta struct {
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cancel context.CancelFunc `msg:"-"` // to be invoked on rebalance-stop
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lastRefreshedAt time.Time `msg:"-"`
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StoppedAt time.Time `msg:"stopTs"` // Time when rebalance-stop was issued.
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ID string `msg:"id"` // ID of the ongoing rebalance operation
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PercentFreeGoal float64 `msg:"pf"` // Computed from total free space and capacity at the start of rebalance
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PoolStats []*rebalanceStats `msg:"rss"` // Per-pool rebalance stats keyed by pool index
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}
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var errRebalanceNotStarted = errors.New("rebalance not started")
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func (z *erasureServerPools) loadRebalanceMeta(ctx context.Context) error {
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r := &rebalanceMeta{}
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err := r.load(ctx, z.serverPools[0])
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if err != nil {
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if errors.Is(err, errConfigNotFound) {
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return nil
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}
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return err
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}
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z.rebalMu.Lock()
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if len(r.PoolStats) == len(z.serverPools) {
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z.rebalMeta = r
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} else {
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z.updateRebalanceStats(ctx)
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}
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z.rebalMu.Unlock()
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return nil
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}
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// updates rebalance.bin from let's say 2 pool setup in the middle
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// of a rebalance, was expanded can cause z.rebalMeta to be outdated
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// due to a missing new pool. This function tries to handle this
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// scenario, albeit rare it seems to have occurred in the wild.
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//
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// since we do not explicitly disallow it, but it is okay for them
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// expand and then we continue to rebalance.
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func (z *erasureServerPools) updateRebalanceStats(ctx context.Context) error {
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var ok bool
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for i := range z.serverPools {
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if z.findIndex(i) == -1 {
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// Also ensure to initialize rebalanceStats to indicate
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// its a new pool that can receive rebalanced data.
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z.rebalMeta.PoolStats = append(z.rebalMeta.PoolStats, &rebalanceStats{})
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ok = true
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}
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}
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if ok {
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lock := z.serverPools[0].NewNSLock(minioMetaBucket, rebalMetaName)
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lkCtx, err := lock.GetLock(ctx, globalOperationTimeout)
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if err != nil {
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logger.LogIf(ctx, fmt.Errorf("failed to acquire write lock on %s/%s: %w", minioMetaBucket, rebalMetaName, err))
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return err
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}
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defer lock.Unlock(lkCtx)
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ctx = lkCtx.Context()
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noLockOpts := ObjectOptions{NoLock: true}
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return z.rebalMeta.saveWithOpts(ctx, z.serverPools[0], noLockOpts)
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}
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return nil
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}
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func (z *erasureServerPools) findIndex(index int) int {
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for i := 0; i < len(z.rebalMeta.PoolStats); i++ {
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if i == index {
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return index
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}
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}
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return -1
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}
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// initRebalanceMeta initializes rebalance metadata for a new rebalance
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// operation and saves it in the object store.
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func (z *erasureServerPools) initRebalanceMeta(ctx context.Context, buckets []string) (arn string, err error) {
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r := &rebalanceMeta{
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ID: shortuuid.New(),
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PoolStats: make([]*rebalanceStats, len(z.serverPools)),
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}
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// Fetch disk capacity and available space.
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si := z.StorageInfo(ctx, true)
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diskStats := make([]struct {
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AvailableSpace uint64
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TotalSpace uint64
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}, len(z.serverPools))
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var totalCap, totalFree uint64
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for _, disk := range si.Disks {
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// Ignore invalid.
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if disk.PoolIndex < 0 || len(diskStats) <= disk.PoolIndex {
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// https://github.com/minio/minio/issues/16500
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continue
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}
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totalCap += disk.TotalSpace
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totalFree += disk.AvailableSpace
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diskStats[disk.PoolIndex].AvailableSpace += disk.AvailableSpace
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diskStats[disk.PoolIndex].TotalSpace += disk.TotalSpace
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}
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r.PercentFreeGoal = float64(totalFree) / float64(totalCap)
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now := time.Now()
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for idx := range z.serverPools {
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r.PoolStats[idx] = &rebalanceStats{
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Buckets: make([]string, len(buckets)),
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RebalancedBuckets: make([]string, 0, len(buckets)),
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InitFreeSpace: diskStats[idx].AvailableSpace,
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InitCapacity: diskStats[idx].TotalSpace,
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}
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copy(r.PoolStats[idx].Buckets, buckets)
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if pfi := float64(diskStats[idx].AvailableSpace) / float64(diskStats[idx].TotalSpace); pfi < r.PercentFreeGoal {
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r.PoolStats[idx].Participating = true
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r.PoolStats[idx].Info = rebalanceInfo{
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StartTime: now,
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Status: rebalStarted,
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}
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}
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}
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err = r.save(ctx, z.serverPools[0])
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if err != nil {
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return arn, err
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}
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z.rebalMeta = r
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return r.ID, nil
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}
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func (z *erasureServerPools) updatePoolStats(poolIdx int, bucket string, fi FileInfo) {
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z.rebalMu.Lock()
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defer z.rebalMu.Unlock()
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r := z.rebalMeta
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if r == nil {
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return
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}
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r.PoolStats[poolIdx].update(bucket, fi)
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}
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const (
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rebalMetaName = "rebalance.bin"
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rebalMetaFmt = 1
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rebalMetaVer = 1
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)
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func (z *erasureServerPools) nextRebalBucket(poolIdx int) (string, bool) {
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z.rebalMu.RLock()
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defer z.rebalMu.RUnlock()
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r := z.rebalMeta
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if r == nil {
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return "", false
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}
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ps := r.PoolStats[poolIdx]
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if ps == nil {
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return "", false
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}
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if ps.Info.Status == rebalCompleted || !ps.Participating {
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return "", false
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}
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if len(ps.Buckets) == 0 {
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return "", false
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}
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return ps.Buckets[0], true
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}
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func (z *erasureServerPools) bucketRebalanceDone(bucket string, poolIdx int) {
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z.rebalMu.Lock()
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defer z.rebalMu.Unlock()
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ps := z.rebalMeta.PoolStats[poolIdx]
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if ps == nil {
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return
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}
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for i, b := range ps.Buckets {
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if b == bucket {
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ps.Buckets = append(ps.Buckets[:i], ps.Buckets[i+1:]...)
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ps.RebalancedBuckets = append(ps.RebalancedBuckets, bucket)
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break
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}
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}
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}
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func (r *rebalanceMeta) load(ctx context.Context, store objectIO) error {
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return r.loadWithOpts(ctx, store, ObjectOptions{})
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}
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func (r *rebalanceMeta) loadWithOpts(ctx context.Context, store objectIO, opts ObjectOptions) error {
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data, _, err := readConfigWithMetadata(ctx, store, rebalMetaName, opts)
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if err != nil {
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return err
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}
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if len(data) == 0 {
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return nil
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}
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if len(data) <= 4 {
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return fmt.Errorf("rebalanceMeta: no data")
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}
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// Read header
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switch binary.LittleEndian.Uint16(data[0:2]) {
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case rebalMetaFmt:
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default:
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return fmt.Errorf("rebalanceMeta: unknown format: %d", binary.LittleEndian.Uint16(data[0:2]))
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}
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switch binary.LittleEndian.Uint16(data[2:4]) {
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case rebalMetaVer:
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default:
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return fmt.Errorf("rebalanceMeta: unknown version: %d", binary.LittleEndian.Uint16(data[2:4]))
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}
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// OK, parse data.
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if _, err = r.UnmarshalMsg(data[4:]); err != nil {
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return err
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}
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r.lastRefreshedAt = time.Now()
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return nil
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}
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func (r *rebalanceMeta) saveWithOpts(ctx context.Context, store objectIO, opts ObjectOptions) error {
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data := make([]byte, 4, r.Msgsize()+4)
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// Initialize the header.
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binary.LittleEndian.PutUint16(data[0:2], rebalMetaFmt)
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binary.LittleEndian.PutUint16(data[2:4], rebalMetaVer)
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buf, err := r.MarshalMsg(data)
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if err != nil {
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return err
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}
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return saveConfigWithOpts(ctx, store, rebalMetaName, buf, opts)
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}
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func (r *rebalanceMeta) save(ctx context.Context, store objectIO) error {
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return r.saveWithOpts(ctx, store, ObjectOptions{})
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}
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func (z *erasureServerPools) IsRebalanceStarted() bool {
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z.rebalMu.RLock()
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defer z.rebalMu.RUnlock()
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if r := z.rebalMeta; r != nil {
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if r.StoppedAt.IsZero() {
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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 (z *erasureServerPools) IsPoolRebalancing(poolIndex int) bool {
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z.rebalMu.RLock()
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defer z.rebalMu.RUnlock()
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if r := z.rebalMeta; r != nil {
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if !r.StoppedAt.IsZero() {
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return false
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}
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ps := z.rebalMeta.PoolStats[poolIndex]
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return ps.Participating && ps.Info.Status == rebalStarted
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}
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return false
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}
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func (z *erasureServerPools) rebalanceBuckets(ctx context.Context, poolIdx int) (err error) {
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doneCh := make(chan struct{})
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defer xioutil.SafeClose(doneCh)
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// Save rebalance.bin periodically.
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go func() {
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// Update rebalance.bin periodically once every 5-10s, chosen randomly
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// to avoid multiple pool leaders herding to update around the same
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// time.
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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randSleepFor := func() time.Duration {
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return 5*time.Second + time.Duration(float64(5*time.Second)*r.Float64())
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}
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timer := time.NewTimer(randSleepFor())
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defer timer.Stop()
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var rebalDone bool
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var traceMsg string
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for {
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select {
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case <-doneCh:
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// rebalance completed for poolIdx
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now := time.Now()
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z.rebalMu.Lock()
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z.rebalMeta.PoolStats[poolIdx].Info.Status = rebalCompleted
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z.rebalMeta.PoolStats[poolIdx].Info.EndTime = now
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z.rebalMu.Unlock()
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rebalDone = true
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traceMsg = fmt.Sprintf("completed at %s", now)
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case <-ctx.Done():
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// rebalance stopped for poolIdx
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now := time.Now()
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z.rebalMu.Lock()
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z.rebalMeta.PoolStats[poolIdx].Info.Status = rebalStopped
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z.rebalMeta.PoolStats[poolIdx].Info.EndTime = now
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z.rebalMeta.cancel = nil // remove the already used context.CancelFunc
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z.rebalMu.Unlock()
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rebalDone = true
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traceMsg = fmt.Sprintf("stopped at %s", now)
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case <-timer.C:
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traceMsg = fmt.Sprintf("saved at %s", time.Now())
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}
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stopFn := globalRebalanceMetrics.log(rebalanceMetricSaveMetadata, poolIdx, traceMsg)
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err := z.saveRebalanceStats(ctx, poolIdx, rebalSaveStats)
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stopFn(err)
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logger.LogIf(ctx, err)
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timer.Reset(randSleepFor())
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if rebalDone {
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return
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}
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}
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}()
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for {
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select {
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case <-ctx.Done():
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return
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default:
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}
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bucket, ok := z.nextRebalBucket(poolIdx)
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if !ok {
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// no more buckets to rebalance or target free_space/capacity reached
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break
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}
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stopFn := globalRebalanceMetrics.log(rebalanceMetricRebalanceBucket, poolIdx, bucket)
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err = z.rebalanceBucket(ctx, bucket, poolIdx)
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if err != nil {
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stopFn(err)
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logger.LogIf(ctx, err)
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return
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}
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stopFn(nil)
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z.bucketRebalanceDone(bucket, poolIdx)
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}
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return err
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}
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func (z *erasureServerPools) checkIfRebalanceDone(poolIdx int) bool {
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z.rebalMu.Lock()
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defer z.rebalMu.Unlock()
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// check if enough objects have been rebalanced
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r := z.rebalMeta
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poolStats := r.PoolStats[poolIdx]
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if poolStats.Info.Status == rebalCompleted {
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return true
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}
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pfi := float64(poolStats.InitFreeSpace+poolStats.Bytes) / float64(poolStats.InitCapacity)
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// Mark pool rebalance as done if within 5% from PercentFreeGoal.
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if diff := math.Abs(pfi - r.PercentFreeGoal); diff <= 0.05 {
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r.PoolStats[poolIdx].Info.Status = rebalCompleted
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r.PoolStats[poolIdx].Info.EndTime = time.Now()
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return true
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}
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return false
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}
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|
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// rebalanceBucket rebalances objects under bucket in poolIdx pool
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func (z *erasureServerPools) rebalanceBucket(ctx context.Context, bucket string, poolIdx int) error {
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ctx = logger.SetReqInfo(ctx, &logger.ReqInfo{})
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vc, _ := globalBucketVersioningSys.Get(bucket)
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// Check if the current bucket has a configured lifecycle policy
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lc, _ := globalLifecycleSys.Get(bucket)
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// Check if bucket is object locked.
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lr, _ := globalBucketObjectLockSys.Get(bucket)
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rcfg, _ := getReplicationConfig(ctx, bucket)
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pool := z.serverPools[poolIdx]
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const envRebalanceWorkers = "_MINIO_REBALANCE_WORKERS"
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wStr := env.Get(envRebalanceWorkers, strconv.Itoa(len(pool.sets)))
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workerSize, err := strconv.Atoi(wStr)
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if err != nil {
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logger.LogIf(ctx, fmt.Errorf("invalid %s value: %s err: %v, defaulting to %d", envRebalanceWorkers, wStr, err, len(pool.sets)))
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workerSize = len(pool.sets)
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}
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workers := make(chan struct{}, workerSize)
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var wg sync.WaitGroup
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for _, set := range pool.sets {
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set := set
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disks := set.getOnlineDisks()
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if len(disks) == 0 {
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logger.LogIf(ctx, fmt.Errorf("no online disks found for set with endpoints %s",
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set.getEndpoints()))
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continue
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}
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filterLifecycle := func(bucket, object string, fi FileInfo) bool {
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if lc == nil {
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return false
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}
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versioned := vc != nil && vc.Versioned(object)
|
|
objInfo := fi.ToObjectInfo(bucket, object, versioned)
|
|
|
|
evt := evalActionFromLifecycle(ctx, *lc, lr, rcfg, objInfo)
|
|
if evt.Action.Delete() {
|
|
globalExpiryState.enqueueByDays(objInfo, evt, lcEventSrc_Rebal)
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
rebalanceEntry := func(entry metaCacheEntry) {
|
|
defer func() {
|
|
<-workers
|
|
wg.Done()
|
|
}()
|
|
|
|
if entry.isDir() {
|
|
return
|
|
}
|
|
|
|
// rebalance on poolIdx has reached its goal
|
|
if z.checkIfRebalanceDone(poolIdx) {
|
|
return
|
|
}
|
|
|
|
fivs, err := entry.fileInfoVersions(bucket)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
// We need a reversed order for rebalance,
|
|
// to create the appropriate stack.
|
|
versionsSorter(fivs.Versions).reverse()
|
|
|
|
var rebalanced, expired int
|
|
for _, version := range fivs.Versions {
|
|
// Skip transitioned objects for now. TBD
|
|
if version.IsRemote() {
|
|
continue
|
|
}
|
|
|
|
// Apply lifecycle rules on the objects that are expired.
|
|
if filterLifecycle(bucket, version.Name, version) {
|
|
expired++
|
|
continue
|
|
}
|
|
|
|
// any object with only single DEL marker we don't need
|
|
// to rebalance, just skip it, this also includes
|
|
// any other versions that have already expired.
|
|
remainingVersions := len(fivs.Versions) - expired
|
|
if version.Deleted && remainingVersions == 1 {
|
|
rebalanced++
|
|
continue
|
|
}
|
|
|
|
versionID := version.VersionID
|
|
if versionID == "" {
|
|
versionID = nullVersionID
|
|
}
|
|
|
|
if version.Deleted {
|
|
_, err := z.DeleteObject(ctx,
|
|
bucket,
|
|
version.Name,
|
|
ObjectOptions{
|
|
Versioned: true,
|
|
VersionID: versionID,
|
|
MTime: version.ModTime,
|
|
DeleteReplication: version.ReplicationState,
|
|
DeleteMarker: true, // make sure we create a delete marker
|
|
SkipRebalancing: true, // make sure we skip the decommissioned pool
|
|
})
|
|
var failure bool
|
|
if err != nil && !isErrObjectNotFound(err) && !isErrVersionNotFound(err) {
|
|
logger.LogIf(ctx, err)
|
|
failure = true
|
|
}
|
|
|
|
if !failure {
|
|
z.updatePoolStats(poolIdx, bucket, version)
|
|
rebalanced++
|
|
}
|
|
continue
|
|
}
|
|
|
|
var failure, ignore bool
|
|
for try := 0; try < 3; try++ {
|
|
// GetObjectReader.Close is called by rebalanceObject
|
|
stopFn := globalRebalanceMetrics.log(rebalanceMetricRebalanceObject, poolIdx, bucket, version.Name, version.VersionID)
|
|
gr, err := set.GetObjectNInfo(ctx,
|
|
bucket,
|
|
encodeDirObject(version.Name),
|
|
nil,
|
|
http.Header{},
|
|
ObjectOptions{
|
|
VersionID: versionID,
|
|
NoDecryption: true,
|
|
NoLock: true,
|
|
})
|
|
if isErrObjectNotFound(err) || isErrVersionNotFound(err) {
|
|
// object deleted by the application, nothing to do here we move on.
|
|
ignore = true
|
|
stopFn(nil)
|
|
break
|
|
}
|
|
if err != nil {
|
|
failure = true
|
|
logger.LogIf(ctx, err)
|
|
stopFn(err)
|
|
continue
|
|
}
|
|
|
|
if err = z.rebalanceObject(ctx, bucket, gr); err != nil {
|
|
failure = true
|
|
logger.LogIf(ctx, err)
|
|
stopFn(err)
|
|
continue
|
|
}
|
|
|
|
stopFn(nil)
|
|
failure = false
|
|
break
|
|
}
|
|
if ignore {
|
|
continue
|
|
}
|
|
if failure {
|
|
break // break out on first error
|
|
}
|
|
z.updatePoolStats(poolIdx, bucket, version)
|
|
rebalanced++
|
|
}
|
|
|
|
// if all versions were rebalanced, we can delete the object versions.
|
|
if rebalanced == len(fivs.Versions) {
|
|
stopFn := globalRebalanceMetrics.log(rebalanceMetricRebalanceRemoveObject, poolIdx, bucket, entry.name)
|
|
_, err := set.DeleteObject(ctx,
|
|
bucket,
|
|
encodeDirObject(entry.name),
|
|
ObjectOptions{
|
|
DeletePrefix: true, // use prefix delete to delete all versions at once.
|
|
DeletePrefixObject: true, // use prefix delete on exact object (this is an optimization to avoid fan-out calls)
|
|
},
|
|
)
|
|
stopFn(err)
|
|
auditLogRebalance(ctx, "Rebalance:DeleteObject", bucket, entry.name, "", err)
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
defer wg.Done()
|
|
|
|
listQuorum := (len(disks) + 1) / 2
|
|
|
|
// How to resolve partial results.
|
|
resolver := metadataResolutionParams{
|
|
dirQuorum: listQuorum, // make sure to capture all quorum ratios
|
|
objQuorum: listQuorum, // make sure to capture all quorum ratios
|
|
bucket: bucket,
|
|
}
|
|
err := listPathRaw(ctx, listPathRawOptions{
|
|
disks: disks,
|
|
bucket: bucket,
|
|
recursive: true,
|
|
forwardTo: "",
|
|
minDisks: listQuorum,
|
|
reportNotFound: false,
|
|
agreed: func(entry metaCacheEntry) {
|
|
workers <- struct{}{}
|
|
wg.Add(1)
|
|
go rebalanceEntry(entry)
|
|
},
|
|
partial: func(entries metaCacheEntries, _ []error) {
|
|
entry, ok := entries.resolve(&resolver)
|
|
if ok {
|
|
workers <- struct{}{}
|
|
wg.Add(1)
|
|
go rebalanceEntry(*entry)
|
|
}
|
|
},
|
|
finished: nil,
|
|
})
|
|
logger.LogIf(ctx, err)
|
|
}()
|
|
}
|
|
wg.Wait()
|
|
return nil
|
|
}
|
|
|
|
type rebalSaveOpts uint8
|
|
|
|
const (
|
|
rebalSaveStats rebalSaveOpts = iota
|
|
rebalSaveStoppedAt
|
|
)
|
|
|
|
func (z *erasureServerPools) saveRebalanceStats(ctx context.Context, poolIdx int, opts rebalSaveOpts) error {
|
|
lock := z.serverPools[0].NewNSLock(minioMetaBucket, rebalMetaName)
|
|
lkCtx, err := lock.GetLock(ctx, globalOperationTimeout)
|
|
if err != nil {
|
|
logger.LogIf(ctx, fmt.Errorf("failed to acquire write lock on %s/%s: %w", minioMetaBucket, rebalMetaName, err))
|
|
return err
|
|
}
|
|
defer lock.Unlock(lkCtx)
|
|
|
|
ctx = lkCtx.Context()
|
|
noLockOpts := ObjectOptions{NoLock: true}
|
|
r := &rebalanceMeta{}
|
|
if err := r.loadWithOpts(ctx, z.serverPools[0], noLockOpts); err != nil {
|
|
return err
|
|
}
|
|
|
|
z.rebalMu.Lock()
|
|
defer z.rebalMu.Unlock()
|
|
|
|
switch opts {
|
|
case rebalSaveStoppedAt:
|
|
r.StoppedAt = time.Now()
|
|
case rebalSaveStats:
|
|
r.PoolStats[poolIdx] = z.rebalMeta.PoolStats[poolIdx]
|
|
}
|
|
z.rebalMeta = r
|
|
|
|
return z.rebalMeta.saveWithOpts(ctx, z.serverPools[0], noLockOpts)
|
|
}
|
|
|
|
func auditLogRebalance(ctx context.Context, apiName, bucket, object, versionID string, err error) {
|
|
errStr := ""
|
|
if err != nil {
|
|
errStr = err.Error()
|
|
}
|
|
auditLogInternal(ctx, AuditLogOptions{
|
|
Event: "rebalance",
|
|
APIName: apiName,
|
|
Bucket: bucket,
|
|
Object: object,
|
|
VersionID: versionID,
|
|
Error: errStr,
|
|
})
|
|
}
|
|
|
|
func (z *erasureServerPools) rebalanceObject(ctx context.Context, bucket string, gr *GetObjectReader) (err error) {
|
|
oi := gr.ObjInfo
|
|
|
|
defer func() {
|
|
gr.Close()
|
|
auditLogRebalance(ctx, "RebalanceCopyData", oi.Bucket, oi.Name, oi.VersionID, err)
|
|
}()
|
|
|
|
actualSize, err := oi.GetActualSize()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if oi.isMultipart() {
|
|
res, err := z.NewMultipartUpload(ctx, bucket, oi.Name, ObjectOptions{
|
|
VersionID: oi.VersionID,
|
|
UserDefined: oi.UserDefined,
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("rebalanceObject: NewMultipartUpload() %w", err)
|
|
}
|
|
defer z.AbortMultipartUpload(ctx, bucket, oi.Name, res.UploadID, ObjectOptions{})
|
|
|
|
parts := make([]CompletePart, len(oi.Parts))
|
|
for i, part := range oi.Parts {
|
|
hr, err := hash.NewReader(ctx, io.LimitReader(gr, part.Size), part.Size, "", "", part.ActualSize)
|
|
if err != nil {
|
|
return fmt.Errorf("rebalanceObject: hash.NewReader() %w", err)
|
|
}
|
|
pi, err := z.PutObjectPart(ctx, bucket, oi.Name, res.UploadID,
|
|
part.Number,
|
|
NewPutObjReader(hr),
|
|
ObjectOptions{
|
|
PreserveETag: part.ETag, // Preserve original ETag to ensure same metadata.
|
|
IndexCB: func() []byte {
|
|
return part.Index // Preserve part Index to ensure decompression works.
|
|
},
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("rebalanceObject: PutObjectPart() %w", err)
|
|
}
|
|
parts[i] = CompletePart{
|
|
ETag: pi.ETag,
|
|
PartNumber: pi.PartNumber,
|
|
}
|
|
}
|
|
_, err = z.CompleteMultipartUpload(ctx, bucket, oi.Name, res.UploadID, parts, ObjectOptions{
|
|
DataMovement: true,
|
|
MTime: oi.ModTime,
|
|
})
|
|
if err != nil {
|
|
err = fmt.Errorf("rebalanceObject: CompleteMultipartUpload() %w", err)
|
|
}
|
|
return err
|
|
}
|
|
|
|
hr, err := hash.NewReader(ctx, gr, oi.Size, "", "", actualSize)
|
|
if err != nil {
|
|
return fmt.Errorf("rebalanceObject: hash.NewReader() %w", err)
|
|
}
|
|
|
|
_, err = z.PutObject(ctx,
|
|
bucket,
|
|
oi.Name,
|
|
NewPutObjReader(hr),
|
|
ObjectOptions{
|
|
DataMovement: true,
|
|
VersionID: oi.VersionID,
|
|
MTime: oi.ModTime,
|
|
UserDefined: oi.UserDefined,
|
|
PreserveETag: oi.ETag, // Preserve original ETag to ensure same metadata.
|
|
IndexCB: func() []byte {
|
|
return oi.Parts[0].Index // Preserve part Index to ensure decompression works.
|
|
},
|
|
})
|
|
if err != nil {
|
|
err = fmt.Errorf("rebalanceObject: PutObject() %w", err)
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (z *erasureServerPools) StartRebalance() {
|
|
z.rebalMu.Lock()
|
|
if z.rebalMeta == nil || !z.rebalMeta.StoppedAt.IsZero() { // rebalance not running, nothing to do
|
|
z.rebalMu.Unlock()
|
|
return
|
|
}
|
|
ctx, cancel := context.WithCancel(GlobalContext)
|
|
z.rebalMeta.cancel = cancel // to be used when rebalance-stop is called
|
|
z.rebalMu.Unlock()
|
|
|
|
z.rebalMu.RLock()
|
|
participants := make([]bool, len(z.rebalMeta.PoolStats))
|
|
for i, ps := range z.rebalMeta.PoolStats {
|
|
// skip pools which have completed rebalancing
|
|
if ps.Info.Status != rebalStarted {
|
|
continue
|
|
}
|
|
|
|
participants[i] = ps.Participating
|
|
}
|
|
z.rebalMu.RUnlock()
|
|
|
|
for poolIdx, doRebalance := range participants {
|
|
if !doRebalance {
|
|
continue
|
|
}
|
|
// nothing to do if this node is not pool's first node (i.e pool's rebalance 'leader').
|
|
if !globalEndpoints[poolIdx].Endpoints[0].IsLocal {
|
|
continue
|
|
}
|
|
|
|
go func(idx int) {
|
|
stopfn := globalRebalanceMetrics.log(rebalanceMetricRebalanceBuckets, idx)
|
|
err := z.rebalanceBuckets(ctx, idx)
|
|
stopfn(err)
|
|
}(poolIdx)
|
|
}
|
|
}
|
|
|
|
// StopRebalance signals the rebalance goroutine running on this node (if any)
|
|
// to stop, using the context.CancelFunc(s) saved at the time ofStartRebalance.
|
|
func (z *erasureServerPools) StopRebalance() error {
|
|
z.rebalMu.Lock()
|
|
defer z.rebalMu.Unlock()
|
|
|
|
r := z.rebalMeta
|
|
if r == nil { // rebalance not running in this node, nothing to do
|
|
return nil
|
|
}
|
|
|
|
if cancel := r.cancel; cancel != nil {
|
|
// cancel != nil only on pool leaders
|
|
r.cancel = nil
|
|
cancel()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// for rebalance trace support
|
|
type rebalanceMetrics struct{}
|
|
|
|
var globalRebalanceMetrics rebalanceMetrics
|
|
|
|
//go:generate stringer -type=rebalanceMetric -trimprefix=rebalanceMetric $GOFILE
|
|
type rebalanceMetric uint8
|
|
|
|
const (
|
|
rebalanceMetricRebalanceBuckets rebalanceMetric = iota
|
|
rebalanceMetricRebalanceBucket
|
|
rebalanceMetricRebalanceObject
|
|
rebalanceMetricRebalanceRemoveObject
|
|
rebalanceMetricSaveMetadata
|
|
)
|
|
|
|
func rebalanceTrace(r rebalanceMetric, poolIdx int, startTime time.Time, duration time.Duration, err error, path string) madmin.TraceInfo {
|
|
var errStr string
|
|
if err != nil {
|
|
errStr = err.Error()
|
|
}
|
|
return madmin.TraceInfo{
|
|
TraceType: madmin.TraceRebalance,
|
|
Time: startTime,
|
|
NodeName: globalLocalNodeName,
|
|
FuncName: fmt.Sprintf("rebalance.%s (pool-id=%d)", r.String(), poolIdx),
|
|
Duration: duration,
|
|
Path: path,
|
|
Error: errStr,
|
|
}
|
|
}
|
|
|
|
func (p *rebalanceMetrics) log(r rebalanceMetric, poolIdx int, paths ...string) func(err error) {
|
|
startTime := time.Now()
|
|
return func(err error) {
|
|
duration := time.Since(startTime)
|
|
if globalTrace.NumSubscribers(madmin.TraceRebalance) > 0 {
|
|
globalTrace.Publish(rebalanceTrace(r, poolIdx, startTime, duration, err, strings.Join(paths, " ")))
|
|
}
|
|
}
|
|
}
|