forked from TrueCloudLab/frostfs-node
501 lines
13 KiB
Go
501 lines
13 KiB
Go
package tree
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import (
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"context"
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"crypto/sha256"
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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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"sync"
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"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/pkg/tracing"
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"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/pilorama"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/netmap"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network"
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cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
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netmapSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
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"github.com/panjf2000/ants/v2"
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"go.uber.org/zap"
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"golang.org/x/sync/errgroup"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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)
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// ErrNotInContainer is returned when operation could not be performed
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// because the node is not included in the container.
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var ErrNotInContainer = errors.New("node is not in container")
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const defaultSyncWorkerCount = 20
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// synchronizeAllTrees synchronizes all the trees of the container. It fetches
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// tree IDs from the other container nodes. Returns ErrNotInContainer if the node
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// is not included in the container.
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func (s *Service) synchronizeAllTrees(ctx context.Context, cid cid.ID) error {
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nodes, pos, err := s.getContainerNodes(cid)
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if err != nil {
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return fmt.Errorf("can't get container nodes: %w", err)
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}
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if pos < 0 {
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return ErrNotInContainer
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}
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nodes = randomizeNodeOrder(nodes, pos)
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if len(nodes) == 0 {
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return nil
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}
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rawCID := make([]byte, sha256.Size)
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cid.Encode(rawCID)
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req := &TreeListRequest{
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Body: &TreeListRequest_Body{
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ContainerId: rawCID,
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},
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}
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err = SignMessage(req, s.key)
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if err != nil {
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return fmt.Errorf("could not sign request: %w", err)
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}
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var resp *TreeListResponse
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var treesToSync []string
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var outErr error
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err = s.forEachNode(ctx, nodes, func(c TreeServiceClient) bool {
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resp, outErr = c.TreeList(ctx, req)
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if outErr != nil {
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return false
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}
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treesToSync = resp.GetBody().GetIds()
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return true
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})
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if err != nil {
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outErr = err
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}
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if outErr != nil {
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return fmt.Errorf("could not fetch tree ID list: %w", outErr)
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}
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for _, tid := range treesToSync {
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h, err := s.forest.TreeLastSyncHeight(ctx, cid, tid)
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if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
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s.log.Warn(logs.TreeCouldNotGetLastSynchronizedHeightForATree,
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zap.Stringer("cid", cid),
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zap.String("tree", tid))
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continue
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}
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newHeight := s.synchronizeTree(ctx, cid, h, tid, nodes)
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if h < newHeight {
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if err := s.forest.TreeUpdateLastSyncHeight(ctx, cid, tid, newHeight); err != nil {
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s.log.Warn(logs.TreeCouldNotUpdateLastSynchronizedHeightForATree,
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zap.Stringer("cid", cid),
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zap.String("tree", tid))
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}
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}
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}
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return nil
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}
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// SynchronizeTree tries to synchronize log starting from the last stored height.
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func (s *Service) SynchronizeTree(ctx context.Context, cid cid.ID, treeID string) error {
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nodes, pos, err := s.getContainerNodes(cid)
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if err != nil {
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return fmt.Errorf("can't get container nodes: %w", err)
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}
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if pos < 0 {
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return ErrNotInContainer
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}
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nodes = randomizeNodeOrder(nodes, pos)
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if len(nodes) == 0 {
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return nil
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}
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s.synchronizeTree(ctx, cid, 0, treeID, nodes)
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return nil
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}
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// mergeOperationStreams performs merge sort for node operation streams to one stream.
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func mergeOperationStreams(streams []chan *pilorama.Move, merged chan<- *pilorama.Move) uint64 {
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defer close(merged)
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ms := make([]*pilorama.Move, len(streams))
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for i := range streams {
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ms[i] = <-streams[i]
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}
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// Merging different node streams shuffles incoming operations like that:
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//
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// x - operation from the stream A
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// o - operation from the stream B
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//
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// --o---o--x--x--x--o---x--x------> t
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// ^
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// If all ops have been successfully applied, we must start from the last
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// operation height from the stream B. This height is stored in minStreamedLastHeight.
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var minStreamedLastHeight uint64 = math.MaxUint64
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for {
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var minTimeMoveTime uint64 = math.MaxUint64
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minTimeMoveIndex := -1
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for i, m := range ms {
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if m != nil && minTimeMoveTime > m.Time {
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minTimeMoveTime = m.Time
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minTimeMoveIndex = i
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}
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}
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if minTimeMoveIndex == -1 {
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break
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}
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merged <- ms[minTimeMoveIndex]
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height := ms[minTimeMoveIndex].Time
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if ms[minTimeMoveIndex] = <-streams[minTimeMoveIndex]; ms[minTimeMoveIndex] == nil {
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if minStreamedLastHeight > height {
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minStreamedLastHeight = height
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}
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}
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}
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return minStreamedLastHeight
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}
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func (s *Service) applyOperationStream(ctx context.Context, cid cid.ID, treeID string,
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operationStream <-chan *pilorama.Move) uint64 {
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errGroup, _ := errgroup.WithContext(ctx)
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const workersCount = 1024
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errGroup.SetLimit(workersCount)
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// We run TreeApply concurrently for the operation batch. Let's consider two operations
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// in the batch m1 and m2 such that m1.Time < m2.Time. The engine may apply m2 and fail
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// on m1. That means the service must start sync from m1.Time in the next iteration and
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// this height is stored in unappliedOperationHeight.
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var unappliedOperationHeight uint64 = math.MaxUint64
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var heightMtx sync.Mutex
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var prev *pilorama.Move
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for m := range operationStream {
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m := m
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// skip already applied op
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if prev != nil && prev.Time == m.Time {
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continue
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}
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prev = m
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errGroup.Go(func() error {
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if err := s.forest.TreeApply(ctx, cid, treeID, m, true); err != nil {
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heightMtx.Lock()
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if m.Time < unappliedOperationHeight {
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unappliedOperationHeight = m.Time
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}
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heightMtx.Unlock()
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return err
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}
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return nil
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})
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}
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_ = errGroup.Wait()
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return unappliedOperationHeight
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}
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func (s *Service) startStream(ctx context.Context, cid cid.ID, treeID string,
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height uint64, treeClient TreeServiceClient, opsCh chan<- *pilorama.Move) (uint64, error) {
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rawCID := make([]byte, sha256.Size)
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cid.Encode(rawCID)
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for {
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newHeight := height
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req := &GetOpLogRequest{
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Body: &GetOpLogRequest_Body{
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ContainerId: rawCID,
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TreeId: treeID,
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Height: newHeight,
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},
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}
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if err := SignMessage(req, s.key); err != nil {
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return 0, err
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}
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c, err := treeClient.GetOpLog(ctx, req)
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if err != nil {
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return 0, fmt.Errorf("can't initialize client: %w", err)
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}
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res, err := c.Recv()
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for ; err == nil; res, err = c.Recv() {
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lm := res.GetBody().GetOperation()
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m := &pilorama.Move{
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Parent: lm.ParentId,
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Child: lm.ChildId,
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}
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if err := m.Meta.FromBytes(lm.Meta); err != nil {
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return 0, err
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}
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opsCh <- m
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}
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if height == newHeight || err != nil && !errors.Is(err, io.EOF) {
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return newHeight, err
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}
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height = newHeight
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}
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}
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// synchronizeTree synchronizes operations getting them from different nodes.
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// Each available node does stream operations to a separate stream. These streams
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// are merged into one big stream ordered by operation time. This way allows to skip
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// already applied operation and keep good batching.
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// The method returns a height that service should start sync from in the next time.
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func (s *Service) synchronizeTree(ctx context.Context, cid cid.ID, from uint64,
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treeID string, nodes []netmapSDK.NodeInfo) uint64 {
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s.log.Debug(logs.TreeSynchronizeTree,
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zap.Stringer("cid", cid),
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zap.String("tree", treeID),
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zap.Uint64("from", from))
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errGroup, egCtx := errgroup.WithContext(ctx)
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const workersCount = 1024
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errGroup.SetLimit(workersCount)
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nodeOperationStreams := make([]chan *pilorama.Move, len(nodes))
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for i := range nodeOperationStreams {
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nodeOperationStreams[i] = make(chan *pilorama.Move)
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}
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merged := make(chan *pilorama.Move)
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var minStreamedLastHeight uint64
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errGroup.Go(func() error {
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minStreamedLastHeight = mergeOperationStreams(nodeOperationStreams, merged)
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return nil
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})
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var minUnappliedHeight uint64
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errGroup.Go(func() error {
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minUnappliedHeight = s.applyOperationStream(ctx, cid, treeID, merged)
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return nil
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})
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for i, n := range nodes {
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i := i
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n := n
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errGroup.Go(func() error {
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height := from
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n.IterateNetworkEndpoints(func(addr string) bool {
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var a network.Address
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if err := a.FromString(addr); err != nil {
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return false
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}
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cc, err := grpc.DialContext(egCtx, a.URIAddr(),
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grpc.WithChainUnaryInterceptor(
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tracing.NewGRPCUnaryClientInteceptor(),
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),
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grpc.WithChainStreamInterceptor(
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tracing.NewGRPCStreamClientInterceptor(),
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),
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grpc.WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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// Failed to connect, try the next address.
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return false
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}
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defer cc.Close()
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treeClient := NewTreeServiceClient(cc)
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for {
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h, err := s.startStream(egCtx, cid, treeID, from, treeClient, nodeOperationStreams[i])
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if height < h {
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height = h
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}
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if err != nil || h <= height {
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// Error with the response, try the next node.
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return true
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}
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}
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})
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close(nodeOperationStreams[i])
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return nil
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})
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}
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if err := errGroup.Wait(); err != nil {
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s.log.Warn(logs.TreeFailedToRunTreeSynchronizationOverAllNodes, zap.Error(err))
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}
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newHeight := minStreamedLastHeight
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if newHeight > minUnappliedHeight {
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newHeight = minUnappliedHeight
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} else {
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newHeight++
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}
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return newHeight
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}
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// ErrAlreadySyncing is returned when a service synchronization has already
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// been started.
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var ErrAlreadySyncing = errors.New("service is being synchronized")
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// ErrShuttingDown is returned when the service is shitting down and could not
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// accept any calls.
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var ErrShuttingDown = errors.New("service is shutting down")
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// SynchronizeAll forces tree service to synchronize all the trees according to
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// netmap information. Must not be called before Service.Start.
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// Returns ErrAlreadySyncing if synchronization has been started and blocked
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// by another routine.
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// Note: non-blocking operation.
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func (s *Service) SynchronizeAll() error {
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select {
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case <-s.closeCh:
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return ErrShuttingDown
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default:
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}
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select {
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case s.syncChan <- struct{}{}:
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return nil
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default:
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return ErrAlreadySyncing
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}
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}
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func (s *Service) syncLoop(ctx context.Context) {
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for {
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select {
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case <-s.closeCh:
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return
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case <-ctx.Done():
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return
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case <-s.syncChan:
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ctx, span := tracing.StartSpanFromContext(ctx, "TreeService.sync")
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s.log.Debug(logs.TreeSyncingTrees)
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cnrs, err := s.cfg.cnrSource.List()
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if err != nil {
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s.log.Error(logs.TreeCouldNotFetchContainers, zap.Error(err))
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span.End()
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continue
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}
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newMap, cnrsToSync := s.containersToSync(cnrs)
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s.syncContainers(ctx, cnrsToSync)
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s.removeContainers(ctx, newMap)
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s.log.Debug(logs.TreeTreesHaveBeenSynchronized)
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span.End()
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}
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}
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}
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func (s *Service) syncContainers(ctx context.Context, cnrs []cid.ID) {
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ctx, span := tracing.StartSpanFromContext(ctx, "TreeService.syncContainers")
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defer span.End()
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// sync new containers
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var wg sync.WaitGroup
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for _, cnr := range cnrs {
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wg.Add(1)
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cnr := cnr
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err := s.syncPool.Submit(func() {
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defer wg.Done()
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s.log.Debug(logs.TreeSyncingContainerTrees, zap.Stringer("cid", cnr))
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err := s.synchronizeAllTrees(ctx, cnr)
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if err != nil {
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s.log.Error(logs.TreeCouldNotSyncTrees, zap.Stringer("cid", cnr), zap.Error(err))
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return
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}
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s.log.Debug(logs.TreeContainerTreesHaveBeenSynced, zap.Stringer("cid", cnr))
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})
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if err != nil {
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wg.Done()
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s.log.Error(logs.TreeCouldNotQueryTreesForSynchronization,
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zap.Stringer("cid", cnr),
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zap.Error(err))
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if errors.Is(err, ants.ErrPoolClosed) {
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return
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}
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}
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}
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wg.Wait()
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}
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func (s *Service) removeContainers(ctx context.Context, newContainers map[cid.ID]struct{}) {
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ctx, span := tracing.StartSpanFromContext(ctx, "TreeService.removeContainers")
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defer span.End()
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s.cnrMapMtx.Lock()
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defer s.cnrMapMtx.Unlock()
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var removed []cid.ID
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for cnr := range s.cnrMap {
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if _, ok := newContainers[cnr]; ok {
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continue
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}
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removed = append(removed, cnr)
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}
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for i := range removed {
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delete(s.cnrMap, removed[i])
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}
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for _, cnr := range removed {
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s.log.Debug(logs.TreeRemovingRedundantTrees, zap.Stringer("cid", cnr))
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err := s.DropTree(ctx, cnr, "")
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if err != nil {
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s.log.Error(logs.TreeCouldNotRemoveRedundantTree,
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zap.Stringer("cid", cnr),
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zap.Error(err))
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}
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}
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}
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func (s *Service) containersToSync(cnrs []cid.ID) (map[cid.ID]struct{}, []cid.ID) {
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newMap := make(map[cid.ID]struct{}, len(s.cnrMap))
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cnrsToSync := make([]cid.ID, 0, len(cnrs))
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for _, cnr := range cnrs {
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_, pos, err := s.getContainerNodes(cnr)
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if err != nil {
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s.log.Error(logs.TreeCouldNotCalculateContainerNodes,
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zap.Stringer("cid", cnr),
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zap.Error(err))
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continue
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}
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if pos < 0 {
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// node is not included in the container.
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continue
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}
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newMap[cnr] = struct{}{}
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cnrsToSync = append(cnrsToSync, cnr)
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}
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return newMap, cnrsToSync
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}
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// randomizeNodeOrder shuffles nodes and removes not a `pos` index.
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// It is assumed that 0 <= pos < len(nodes).
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func randomizeNodeOrder(cnrNodes []netmap.NodeInfo, pos int) []netmap.NodeInfo {
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if len(cnrNodes) == 1 {
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return nil
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}
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nodes := make([]netmap.NodeInfo, len(cnrNodes)-1)
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n := copy(nodes, cnrNodes[:pos])
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copy(nodes[n:], cnrNodes[pos+1:])
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rand.Shuffle(len(nodes), func(i, j int) {
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nodes[i], nodes[j] = nodes[j], nodes[i]
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})
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return nodes
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}
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