961e841bd7
errs.Class should not contain "error" in the name, since that causes a
lot of stutter in the error logs. As an example a log line could end up
looking like:
ERROR node stats service error: satellitedbs error: node stats database error: no rows
Whereas something like:
ERROR nodestats service: satellitedbs: nodestatsdb: no rows
Would contain all the necessary information without the stutter.
Change-Id: I7b7cb7e592ebab4bcfadc1eef11122584d2b20e0
587 lines
21 KiB
Go
587 lines
21 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package checker
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import (
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"context"
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"time"
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"github.com/spacemonkeygo/monkit/v3"
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"github.com/zeebo/errs"
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"go.uber.org/zap"
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"golang.org/x/sync/errgroup"
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"storj.io/common/errs2"
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"storj.io/common/pb"
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"storj.io/common/storj"
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"storj.io/common/sync2"
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"storj.io/storj/satellite/internalpb"
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"storj.io/storj/satellite/metabase"
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"storj.io/storj/satellite/metabase/metaloop"
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"storj.io/storj/satellite/metainfo"
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"storj.io/storj/satellite/overlay"
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"storj.io/storj/satellite/repair"
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"storj.io/storj/satellite/repair/irreparable"
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"storj.io/storj/satellite/repair/queue"
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)
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// Error is a standard error class for this package.
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var (
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Error = errs.Class("repair checker")
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mon = monkit.Package()
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)
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// Checker contains the information needed to do checks for missing pieces.
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//
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// architecture: Chore
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type Checker struct {
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logger *zap.Logger
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repairQueue queue.RepairQueue
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irrdb irreparable.DB
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metabase metainfo.MetabaseDB
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metaLoop *metaloop.Service
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nodestate *ReliabilityCache
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statsCollector *statsCollector
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repairOverrides RepairOverridesMap
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nodeFailureRate float64
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Loop *sync2.Cycle
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IrreparableLoop *sync2.Cycle
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}
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// NewChecker creates a new instance of checker.
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func NewChecker(logger *zap.Logger, repairQueue queue.RepairQueue, irrdb irreparable.DB, metabase metainfo.MetabaseDB, metaLoop *metaloop.Service, overlay *overlay.Service, config Config) *Checker {
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return &Checker{
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logger: logger,
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repairQueue: repairQueue,
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irrdb: irrdb,
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metabase: metabase,
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metaLoop: metaLoop,
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nodestate: NewReliabilityCache(overlay, config.ReliabilityCacheStaleness),
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statsCollector: newStatsCollector(),
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repairOverrides: config.RepairOverrides.GetMap(),
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nodeFailureRate: config.NodeFailureRate,
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Loop: sync2.NewCycle(config.Interval),
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IrreparableLoop: sync2.NewCycle(config.IrreparableInterval),
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}
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}
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// Run the checker loop.
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func (checker *Checker) Run(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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group, ctx := errgroup.WithContext(ctx)
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group.Go(func() error {
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return checker.Loop.Run(ctx, checker.IdentifyInjuredSegments)
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})
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group.Go(func() error {
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return checker.IrreparableLoop.Run(ctx, checker.IrreparableProcess)
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})
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return group.Wait()
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}
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// getNodesEstimate updates the estimate of the total number of nodes. It is guaranteed
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// to return a number greater than 0 when the error is nil.
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//
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// We can't calculate this upon first starting a Checker, because there may not be any
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// nodes yet. We expect that there will be nodes before there are segments, though.
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func (checker *Checker) getNodesEstimate(ctx context.Context) (int, error) {
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// this should be safe to call frequently; it is an efficient caching lookup.
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totalNumNodes, err := checker.nodestate.NumNodes(ctx)
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if err != nil {
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// We could proceed here by returning the last good value, or by returning a fallback
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// constant estimate, like "20000", and we'd probably be fine, but it would be better
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// not to have that happen silently for too long. Also, if we can't get this from the
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// database, we probably can't modify the injured segments queue, so it won't help to
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// proceed with this repair operation.
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return 0, err
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}
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if totalNumNodes == 0 {
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return 0, Error.New("segment health is meaningless: there are no nodes")
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}
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return totalNumNodes, nil
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}
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// RefreshReliabilityCache forces refreshing node online status cache.
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func (checker *Checker) RefreshReliabilityCache(ctx context.Context) error {
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return checker.nodestate.Refresh(ctx)
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}
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// Close halts the Checker loop.
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func (checker *Checker) Close() error {
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checker.Loop.Close()
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return nil
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}
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// IdentifyInjuredSegments checks for missing pieces off of the metainfo and overlay.
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func (checker *Checker) IdentifyInjuredSegments(ctx context.Context) (err error) {
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defer mon.Task()(&ctx)(&err)
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startTime := time.Now()
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observer := &checkerObserver{
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repairQueue: checker.repairQueue,
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irrdb: checker.irrdb,
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nodestate: checker.nodestate,
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statsCollector: checker.statsCollector,
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monStats: aggregateStats{},
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repairOverrides: checker.repairOverrides,
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nodeFailureRate: checker.nodeFailureRate,
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getNodesEstimate: checker.getNodesEstimate,
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log: checker.logger,
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}
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err = checker.metaLoop.Join(ctx, observer)
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if err != nil {
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if !errs2.IsCanceled(err) {
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checker.logger.Error("IdentifyInjuredSegments error", zap.Error(err))
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}
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return err
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}
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// remove all segments which were not seen as unhealthy by this checker iteration
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healthyDeleted, err := checker.repairQueue.Clean(ctx, startTime)
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if err != nil {
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return Error.Wrap(err)
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}
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checker.statsCollector.collectAggregates()
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mon.IntVal("remote_files_checked").Observe(observer.monStats.objectsChecked) //mon:locked
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mon.IntVal("remote_segments_checked").Observe(observer.monStats.remoteSegmentsChecked) //mon:locked
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mon.IntVal("remote_segments_failed_to_check").Observe(observer.monStats.remoteSegmentsFailedToCheck) //mon:locked
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mon.IntVal("remote_segments_needing_repair").Observe(observer.monStats.remoteSegmentsNeedingRepair) //mon:locked
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mon.IntVal("new_remote_segments_needing_repair").Observe(observer.monStats.newRemoteSegmentsNeedingRepair) //mon:locked
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mon.IntVal("remote_segments_lost").Observe(observer.monStats.remoteSegmentsLost) //mon:locked
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mon.IntVal("remote_files_lost").Observe(int64(len(observer.monStats.remoteSegmentInfo))) //mon:locked
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mon.IntVal("remote_segments_over_threshold_1").Observe(observer.monStats.remoteSegmentsOverThreshold[0]) //mon:locked
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mon.IntVal("remote_segments_over_threshold_2").Observe(observer.monStats.remoteSegmentsOverThreshold[1]) //mon:locked
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mon.IntVal("remote_segments_over_threshold_3").Observe(observer.monStats.remoteSegmentsOverThreshold[2]) //mon:locked
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mon.IntVal("remote_segments_over_threshold_4").Observe(observer.monStats.remoteSegmentsOverThreshold[3]) //mon:locked
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mon.IntVal("remote_segments_over_threshold_5").Observe(observer.monStats.remoteSegmentsOverThreshold[4]) //mon:locked
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mon.IntVal("healthy_segments_removed_from_queue").Observe(healthyDeleted) //mon:locked
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allUnhealthy := observer.monStats.remoteSegmentsNeedingRepair + observer.monStats.remoteSegmentsFailedToCheck
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allChecked := observer.monStats.remoteSegmentsChecked
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allHealthy := allChecked - allUnhealthy
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mon.FloatVal("remote_segments_healthy_percentage").Observe(100 * float64(allHealthy) / float64(allChecked)) //mon:locked
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return nil
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}
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// checks for a object location in slice.
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func containsObjectLocation(a []metabase.ObjectLocation, x metabase.ObjectLocation) bool {
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for _, n := range a {
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if x == n {
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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 (checker *Checker) updateIrreparableSegmentStatus(ctx context.Context, key metabase.SegmentKey, redundancy storj.RedundancyScheme, creationDate time.Time, pieces metabase.Pieces) (err error) {
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defer mon.Task()(&ctx)(&err)
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if len(pieces) == 0 {
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checker.logger.Debug("no pieces on remote segment")
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return nil
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}
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missingPieces, err := checker.nodestate.MissingPieces(ctx, creationDate, pieces)
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if err != nil {
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return errs.Combine(Error.New("error getting missing pieces"), err)
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}
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numHealthy := int32(len(pieces) - len(missingPieces))
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repairThreshold := int32(redundancy.RepairShares)
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pbRedundancy := &pb.RedundancyScheme{
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MinReq: int32(redundancy.RequiredShares),
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RepairThreshold: int32(redundancy.RepairShares),
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SuccessThreshold: int32(redundancy.OptimalShares),
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Total: int32(redundancy.TotalShares),
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}
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overrideValue := checker.repairOverrides.GetOverrideValuePB(pbRedundancy)
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if overrideValue != 0 {
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repairThreshold = overrideValue
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}
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totalNumNodes, err := checker.getNodesEstimate(ctx)
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if err != nil {
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return Error.New("could not get estimate of total number of nodes: %w", err)
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}
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// we repair when the number of healthy pieces is less than or equal to the repair threshold and is greater or equal to
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// minimum required pieces in redundancy
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// except for the case when the repair and success thresholds are the same (a case usually seen during testing)
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//
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// If the segment is suddenly entirely healthy again, we don't need to repair and we don't need to
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// keep it in the irreparabledb queue either.
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if numHealthy >= int32(redundancy.RequiredShares) && numHealthy <= repairThreshold && numHealthy < int32(redundancy.OptimalShares) {
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segmentHealth := repair.SegmentHealth(int(numHealthy), int(redundancy.RequiredShares), totalNumNodes, checker.nodeFailureRate)
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_, err = checker.repairQueue.Insert(ctx, &internalpb.InjuredSegment{
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Path: key,
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LostPieces: missingPieces,
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InsertedTime: time.Now().UTC(),
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}, segmentHealth)
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if err != nil {
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return errs.Combine(Error.New("error adding injured segment to queue"), err)
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}
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// delete always returns nil when something was deleted and also when element didn't exists
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err = checker.irrdb.Delete(ctx, key)
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if err != nil {
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checker.logger.Error("error deleting entry from irreparable db: ", zap.Error(err))
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}
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} else if numHealthy < int32(redundancy.RequiredShares) && numHealthy < repairThreshold {
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// make an entry into the irreparable table
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segmentInfo := &internalpb.IrreparableSegment{
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Path: key,
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LostPieces: int32(len(missingPieces)),
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LastRepairAttempt: time.Now().Unix(),
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RepairAttemptCount: int64(1),
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}
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// add the entry if new or update attempt count if already exists
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err := checker.irrdb.IncrementRepairAttempts(ctx, segmentInfo)
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if err != nil {
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return errs.Combine(Error.New("error handling irreparable segment to queue"), err)
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}
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} else if numHealthy > repairThreshold || numHealthy >= int32(redundancy.OptimalShares) {
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err = checker.irrdb.Delete(ctx, key)
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if err != nil {
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return Error.New("error removing segment from irreparable queue: %v", err)
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}
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}
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return nil
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}
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var _ metaloop.Observer = (*checkerObserver)(nil)
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// checkerObserver implements the metainfo loop Observer interface.
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//
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// architecture: Observer
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type checkerObserver struct {
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repairQueue queue.RepairQueue
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irrdb irreparable.DB
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nodestate *ReliabilityCache
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statsCollector *statsCollector
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monStats aggregateStats // TODO(cam): once we verify statsCollector reports data correctly, remove this
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repairOverrides RepairOverridesMap
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nodeFailureRate float64
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getNodesEstimate func(ctx context.Context) (int, error)
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log *zap.Logger
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// we need to delay counting objects to ensure they get associated with the correct redundancy only once
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objectCounted bool
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}
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func (obs *checkerObserver) getStatsByRS(redundancy storj.RedundancyScheme) *stats {
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rsString := getRSString(obs.loadRedundancy(redundancy))
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return obs.statsCollector.getStatsByRS(rsString)
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}
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func (obs *checkerObserver) loadRedundancy(redundancy storj.RedundancyScheme) (int, int, int, int) {
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repair := int(redundancy.RepairShares)
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overrideValue := obs.repairOverrides.GetOverrideValue(redundancy)
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if overrideValue != 0 {
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repair = int(overrideValue)
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}
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return int(redundancy.RequiredShares), repair, int(redundancy.OptimalShares), int(redundancy.TotalShares)
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}
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// LoopStarted is called at each start of a loop.
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func (obs *checkerObserver) LoopStarted(context.Context, metaloop.LoopInfo) (err error) {
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return nil
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}
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func (obs *checkerObserver) RemoteSegment(ctx context.Context, segment *metaloop.Segment) (err error) {
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defer mon.Task()(&ctx)(&err)
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// ignore segment if expired
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if segment.Expired(time.Now()) {
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return nil
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}
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stats := obs.getStatsByRS(segment.Redundancy)
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if !obs.objectCounted {
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obs.objectCounted = true
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stats.iterationAggregates.objectsChecked++
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}
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obs.monStats.remoteSegmentsChecked++
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stats.iterationAggregates.remoteSegmentsChecked++
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// ensure we get values, even if only zero values, so that redash can have an alert based on this
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mon.Counter("checker_segments_below_min_req").Inc(0) //mon:locked
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stats.segmentsBelowMinReq.Inc(0)
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pieces := segment.Pieces
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if len(pieces) == 0 {
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obs.log.Debug("no pieces on remote segment")
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return nil
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}
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pbPieces := make([]*pb.RemotePiece, len(pieces))
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for i, piece := range pieces {
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pbPieces[i] = &pb.RemotePiece{
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PieceNum: int32(piece.Number),
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NodeId: piece.StorageNode,
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}
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}
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totalNumNodes, err := obs.getNodesEstimate(ctx)
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if err != nil {
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return Error.New("could not get estimate of total number of nodes: %w", err)
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}
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createdAt := time.Time{}
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if segment.CreatedAt != nil {
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createdAt = *segment.CreatedAt
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}
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repairedAt := time.Time{}
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if segment.RepairedAt != nil {
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repairedAt = *segment.RepairedAt
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}
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missingPieces, err := obs.nodestate.MissingPieces(ctx, createdAt, segment.Pieces)
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if err != nil {
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obs.monStats.remoteSegmentsFailedToCheck++
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stats.iterationAggregates.remoteSegmentsFailedToCheck++
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return errs.Combine(Error.New("error getting missing pieces"), err)
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}
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numHealthy := len(pieces) - len(missingPieces)
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mon.IntVal("checker_segment_total_count").Observe(int64(len(pieces))) //mon:locked
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stats.segmentTotalCount.Observe(int64(len(pieces)))
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mon.IntVal("checker_segment_healthy_count").Observe(int64(numHealthy)) //mon:locked
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stats.segmentHealthyCount.Observe(int64(numHealthy))
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segmentAge := time.Since(createdAt)
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mon.IntVal("checker_segment_age").Observe(int64(segmentAge.Seconds())) //mon:locked
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stats.segmentAge.Observe(int64(segmentAge.Seconds()))
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required, repairThreshold, successThreshold, _ := obs.loadRedundancy(segment.Redundancy)
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segmentHealth := repair.SegmentHealth(numHealthy, required, totalNumNodes, obs.nodeFailureRate)
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mon.FloatVal("checker_segment_health").Observe(segmentHealth) //mon:locked
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stats.segmentHealth.Observe(segmentHealth)
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key := segment.Location.Encode()
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// we repair when the number of healthy pieces is less than or equal to the repair threshold and is greater or equal to
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// minimum required pieces in redundancy
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// except for the case when the repair and success thresholds are the same (a case usually seen during testing)
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if numHealthy >= required && numHealthy <= repairThreshold && numHealthy < successThreshold {
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mon.FloatVal("checker_injured_segment_health").Observe(segmentHealth) //mon:locked
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stats.injuredSegmentHealth.Observe(segmentHealth)
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obs.monStats.remoteSegmentsNeedingRepair++
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stats.iterationAggregates.remoteSegmentsNeedingRepair++
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alreadyInserted, err := obs.repairQueue.Insert(ctx, &internalpb.InjuredSegment{
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Path: key,
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LostPieces: missingPieces,
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InsertedTime: time.Now().UTC(),
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}, segmentHealth)
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if err != nil {
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obs.log.Error("error adding injured segment to queue", zap.Error(err))
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return nil
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}
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if !alreadyInserted {
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obs.monStats.newRemoteSegmentsNeedingRepair++
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stats.iterationAggregates.newRemoteSegmentsNeedingRepair++
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}
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// delete always returns nil when something was deleted and also when element didn't exists
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err = obs.irrdb.Delete(ctx, key)
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if err != nil {
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obs.log.Error("error deleting entry from irreparable db", zap.Error(err))
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return nil
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}
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} else if numHealthy < required && numHealthy < repairThreshold {
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lostSegInfo := segment.Location.Object()
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if !containsObjectLocation(obs.monStats.remoteSegmentInfo, lostSegInfo) {
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obs.monStats.remoteSegmentInfo = append(obs.monStats.remoteSegmentInfo, lostSegInfo)
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}
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if !containsObjectLocation(stats.iterationAggregates.remoteSegmentInfo, lostSegInfo) {
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stats.iterationAggregates.remoteSegmentInfo = append(stats.iterationAggregates.remoteSegmentInfo, lostSegInfo)
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}
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var segmentAge time.Duration
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if createdAt.Before(repairedAt) {
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segmentAge = time.Since(repairedAt)
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} else {
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segmentAge = time.Since(createdAt)
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}
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mon.IntVal("checker_segment_time_until_irreparable").Observe(int64(segmentAge.Seconds())) //mon:locked
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stats.segmentTimeUntilIrreparable.Observe(int64(segmentAge.Seconds()))
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obs.monStats.remoteSegmentsLost++
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stats.iterationAggregates.remoteSegmentsLost++
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mon.Counter("checker_segments_below_min_req").Inc(1) //mon:locked
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stats.segmentsBelowMinReq.Inc(1)
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// make an entry into the irreparable table
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segmentInfo := &internalpb.IrreparableSegment{
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Path: key,
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LostPieces: int32(len(missingPieces)),
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LastRepairAttempt: time.Now().Unix(),
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RepairAttemptCount: int64(1),
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}
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// add the entry if new or update attempt count if already exists
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err := obs.irrdb.IncrementRepairAttempts(ctx, segmentInfo)
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if err != nil {
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obs.log.Error("error handling irreparable segment to queue", zap.Error(err))
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return nil
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}
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} else {
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if numHealthy > repairThreshold && numHealthy <= (repairThreshold+len(obs.monStats.remoteSegmentsOverThreshold)) {
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|
// record metrics for segments right above repair threshold
|
|
// numHealthy=repairThreshold+1 through numHealthy=repairThreshold+5
|
|
for i := range obs.monStats.remoteSegmentsOverThreshold {
|
|
if numHealthy == (repairThreshold + i + 1) {
|
|
obs.monStats.remoteSegmentsOverThreshold[i]++
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if numHealthy > repairThreshold && numHealthy <= (repairThreshold+len(stats.iterationAggregates.remoteSegmentsOverThreshold)) {
|
|
// record metrics for segments right above repair threshold
|
|
// numHealthy=repairThreshold+1 through numHealthy=repairThreshold+5
|
|
for i := range stats.iterationAggregates.remoteSegmentsOverThreshold {
|
|
if numHealthy == (repairThreshold + i + 1) {
|
|
stats.iterationAggregates.remoteSegmentsOverThreshold[i]++
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (obs *checkerObserver) Object(ctx context.Context, object *metaloop.Object) (err error) {
|
|
defer mon.Task()(&ctx)(&err)
|
|
|
|
obs.monStats.objectsChecked++
|
|
|
|
// TODO: check for expired objects
|
|
|
|
if object.SegmentCount == 0 {
|
|
stats := obs.getStatsByRS(storj.RedundancyScheme{})
|
|
stats.iterationAggregates.objectsChecked++
|
|
return nil
|
|
}
|
|
obs.objectCounted = false
|
|
|
|
return nil
|
|
}
|
|
|
|
func (obs *checkerObserver) InlineSegment(ctx context.Context, segment *metaloop.Segment) (err error) {
|
|
defer mon.Task()(&ctx)(&err)
|
|
|
|
// TODO: check for expired segments
|
|
|
|
if !obs.objectCounted {
|
|
// Note: this may give false stats when an object starts with a inline segment.
|
|
obs.objectCounted = true
|
|
stats := obs.getStatsByRS(storj.RedundancyScheme{})
|
|
stats.iterationAggregates.objectsChecked++
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// IrreparableProcess iterates over all items in the irreparabledb. If an item can
|
|
// now be repaired then it is added to a worker queue.
|
|
func (checker *Checker) IrreparableProcess(ctx context.Context) (err error) {
|
|
defer mon.Task()(&ctx)(&err)
|
|
const limit = 1000
|
|
lastSeenSegmentKey := metabase.SegmentKey{}
|
|
|
|
for {
|
|
segments, err := checker.irrdb.GetLimited(ctx, limit, lastSeenSegmentKey)
|
|
if err != nil {
|
|
return errs.Combine(Error.New("error reading segment from the queue"), err)
|
|
}
|
|
|
|
// zero segments returned with nil err
|
|
if len(segments) == 0 {
|
|
break
|
|
}
|
|
|
|
lastSeenSegmentKey = metabase.SegmentKey(segments[len(segments)-1].Path)
|
|
|
|
for _, segment := range segments {
|
|
var redundancy storj.RedundancyScheme
|
|
var pieces metabase.Pieces
|
|
var createAt time.Time
|
|
if segment.SegmentDetail == (&pb.Pointer{}) {
|
|
// TODO IrreparableDB will be removed in a future so we shouldn't care too much about performance
|
|
location, err := metabase.ParseSegmentKey(metabase.SegmentKey(segment.GetPath()))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
object, err := checker.metabase.GetObjectLatestVersion(ctx, metabase.GetObjectLatestVersion{
|
|
ObjectLocation: location.Object(),
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
createAt = object.CreatedAt
|
|
|
|
segment, err := checker.metabase.GetSegmentByPosition(ctx, metabase.GetSegmentByPosition{
|
|
StreamID: object.StreamID,
|
|
Position: location.Position,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
redundancy = segment.Redundancy
|
|
} else {
|
|
// skip inline segments
|
|
if segment.SegmentDetail.Remote == nil {
|
|
return nil
|
|
}
|
|
|
|
createAt = segment.SegmentDetail.CreationDate
|
|
|
|
pbRedundancy := segment.SegmentDetail.Remote.Redundancy
|
|
redundancy = storj.RedundancyScheme{
|
|
RequiredShares: int16(pbRedundancy.MinReq),
|
|
RepairShares: int16(pbRedundancy.RepairThreshold),
|
|
OptimalShares: int16(pbRedundancy.SuccessThreshold),
|
|
TotalShares: int16(pbRedundancy.Total),
|
|
ShareSize: pbRedundancy.ErasureShareSize,
|
|
}
|
|
pieces = make(metabase.Pieces, len(segment.SegmentDetail.Remote.RemotePieces))
|
|
for _, piece := range segment.SegmentDetail.Remote.RemotePieces {
|
|
pieces = append(pieces, metabase.Piece{
|
|
Number: uint16(piece.PieceNum),
|
|
StorageNode: piece.NodeId,
|
|
})
|
|
}
|
|
}
|
|
|
|
err = checker.updateIrreparableSegmentStatus(ctx,
|
|
metabase.SegmentKey(segment.GetPath()),
|
|
redundancy,
|
|
createAt,
|
|
pieces,
|
|
)
|
|
if err != nil {
|
|
checker.logger.Error("irrepair segment checker failed: ", zap.Error(err))
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|