// NewStore returns a new store. It is useful to create a store inside
// storage pkg. It should only be used for testing externally.
func NewStore(b backend.Backend, le lease.Lessor) *store {
s := &store{
b: b,
kvindex: newTreeIndex(),
le: le,
currentRev: revision{main: 1},
compactMainRev: -1,
fifoSched: schedule.NewFIFOScheduler(),
stopc: make(chan struct{}),
}
if s.le != nil {
s.le.SetRangeDeleter(s)
}
tx := s.b.BatchTx()
tx.Lock()
tx.UnsafeCreateBucket(keyBucketName)
tx.UnsafeCreateBucket(metaBucketName)
tx.Unlock()
s.b.ForceCommit()
if err := s.restore(); err != nil {
// TODO: return the error instead of panic here?
panic("failed to recover store from backend")
}
return s
}
func (s *EtcdServer) run() {
snap, err := s.r.raftStorage.Snapshot()
if err != nil {
plog.Panicf("get snapshot from raft storage error: %v", err)
}
s.r.start(s)
// asynchronously accept apply packets, dispatch progress in-order
sched := schedule.NewFIFOScheduler()
ep := etcdProgress{
confState: snap.Metadata.ConfState,
snapi: snap.Metadata.Index,
appliedi: snap.Metadata.Index,
}
defer func() {
s.r.stop()
sched.Stop()
// kv, lessor and backend can be nil if running without v3 enabled
// or running unit tests.
if s.lessor != nil {
s.lessor.Stop()
}
if s.kv != nil {
s.kv.Close()
}
if s.be != nil {
s.be.Close()
}
close(s.done)
}()
var expiredLeaseC <-chan []*lease.Lease
if s.lessor != nil {
expiredLeaseC = s.lessor.ExpiredLeasesC()
}
for {
select {
case ap := <-s.r.apply():
f := func(context.Context) { s.applyAll(&ep, &ap) }
sched.Schedule(f)
case leases := <-expiredLeaseC:
go func() {
for _, l := range leases {
s.LeaseRevoke(context.TODO(), &pb.LeaseRevokeRequest{ID: int64(l.ID)})
}
}()
case err := <-s.errorc:
plog.Errorf("%s", err)
plog.Infof("the data-dir used by this member must be removed.")
return
case <-s.stop:
return
}
}
}
func (s *store) Restore(b backend.Backend) error {
s.mu.Lock()
defer s.mu.Unlock()
close(s.stopc)
s.fifoSched.Stop()
s.b = b
s.kvindex = newTreeIndex()
s.currentRev = revision{main: 1}
s.compactMainRev = -1
s.tx = b.BatchTx()
s.txnID = -1
s.fifoSched = schedule.NewFIFOScheduler()
s.stopc = make(chan struct{})
return s.restore()
}
func newFakeStore() *store {
b := &fakeBackend{&fakeBatchTx{
Recorder: &testutil.RecorderBuffered{},
rangeRespc: make(chan rangeResp, 5)}}
fi := &fakeIndex{
Recorder: &testutil.RecorderBuffered{},
indexGetRespc: make(chan indexGetResp, 1),
indexRangeRespc: make(chan indexRangeResp, 1),
indexRangeEventsRespc: make(chan indexRangeEventsResp, 1),
indexCompactRespc: make(chan map[revision]struct{}, 1),
}
return &store{
b: b,
le: &lease.FakeLessor{},
kvindex: fi,
currentRev: revision{},
compactMainRev: -1,
fifoSched: schedule.NewFIFOScheduler(),
stopc: make(chan struct{}),
}
}
func (s *EtcdServer) run() {
snap, err := s.r.raftStorage.Snapshot()
if err != nil {
plog.Panicf("get snapshot from raft storage error: %v", err)
}
var (
smu sync.RWMutex
syncC <-chan time.Time
)
setSyncC := func(ch <-chan time.Time) {
smu.Lock()
syncC = ch
smu.Unlock()
}
getSyncC := func() (ch <-chan time.Time) {
smu.RLock()
ch = syncC
smu.RUnlock()
return
}
rh := &raftReadyHandler{
leadershipUpdate: func() {
if !s.isLeader() {
if s.lessor != nil {
s.lessor.Demote()
}
if s.compactor != nil {
s.compactor.Pause()
}
setSyncC(nil)
} else {
setSyncC(s.SyncTicker)
}
// TODO: remove the nil checking
// current test utility does not provide the stats
if s.stats != nil {
s.stats.BecomeLeader()
}
if s.compactor != nil {
s.compactor.Resume()
}
if s.r.td != nil {
s.r.td.Reset()
}
},
}
s.r.start(rh)
// asynchronously accept apply packets, dispatch progress in-order
sched := schedule.NewFIFOScheduler()
ep := etcdProgress{
confState: snap.Metadata.ConfState,
snapi: snap.Metadata.Index,
appliedi: snap.Metadata.Index,
}
defer func() {
s.wgMu.Lock() // block concurrent waitgroup adds in goAttach while stopping
close(s.stopping)
s.wgMu.Unlock()
sched.Stop()
// wait for gouroutines before closing raft so wal stays open
s.wg.Wait()
// must stop raft after scheduler-- etcdserver can leak rafthttp pipelines
// by adding a peer after raft stops the transport
s.r.stop()
// kv, lessor and backend can be nil if running without v3 enabled
// or running unit tests.
if s.lessor != nil {
s.lessor.Stop()
}
if s.kv != nil {
s.kv.Close()
}
if s.be != nil {
s.be.Close()
}
if s.compactor != nil {
s.compactor.Stop()
}
close(s.done)
}()
var expiredLeaseC <-chan []*lease.Lease
if s.lessor != nil {
expiredLeaseC = s.lessor.ExpiredLeasesC()
}
for {
select {
case ap := <-s.r.apply():
var ci uint64
if len(ap.entries) != 0 {
ci = ap.entries[len(ap.entries)-1].Index
}
if ap.snapshot.Metadata.Index > ci {
ci = ap.snapshot.Metadata.Index
}
if ci != 0 {
s.setCommittedIndex(ci)
}
f := func(context.Context) { s.applyAll(&ep, &ap) }
sched.Schedule(f)
case leases := <-expiredLeaseC:
s.goAttach(func() {
// Increases throughput of expired leases deletion process through parallelization
c := make(chan struct{}, maxPendingRevokes)
for _, lease := range leases {
select {
case c <- struct{}{}:
case <-s.stopping:
return
}
lid := lease.ID
s.goAttach(func() {
s.LeaseRevoke(context.TODO(), &pb.LeaseRevokeRequest{ID: int64(lid)})
<-c
})
}
})
case err := <-s.errorc:
plog.Errorf("%s", err)
plog.Infof("the data-dir used by this member must be removed.")
return
case <-getSyncC():
s.sync(s.Cfg.ReqTimeout())
case <-s.stop:
return
}
}
}
func (s *EtcdServer) run() {
snap, err := s.r.raftStorage.Snapshot()
if err != nil {
plog.Panicf("get snapshot from raft storage error: %v", err)
}
s.r.start(s)
// asynchronously accept apply packets, dispatch progress in-order
sched := schedule.NewFIFOScheduler()
ep := etcdProgress{
confState: snap.Metadata.ConfState,
snapi: snap.Metadata.Index,
appliedi: snap.Metadata.Index,
}
defer func() {
close(s.stopping)
sched.Stop()
// wait for gouroutines before closing raft so wal stays open
s.wg.Wait()
// must stop raft after scheduler-- etcdserver can leak rafthttp pipelines
// by adding a peer after raft stops the transport
s.r.stop()
// kv, lessor and backend can be nil if running without v3 enabled
// or running unit tests.
if s.lessor != nil {
s.lessor.Stop()
}
if s.kv != nil {
s.kv.Close()
}
if s.be != nil {
s.be.Close()
}
if s.compactor != nil {
s.compactor.Stop()
}
close(s.done)
}()
var expiredLeaseC <-chan []*lease.Lease
if s.lessor != nil {
expiredLeaseC = s.lessor.ExpiredLeasesC()
}
for {
select {
case ap := <-s.r.apply():
var ci uint64
if len(ap.entries) != 0 {
ci = ap.entries[len(ap.entries)-1].Index
}
if ap.snapshot.Metadata.Index > ci {
ci = ap.snapshot.Metadata.Index
}
if ci != 0 {
s.setCommittedIndex(ci)
}
f := func(context.Context) { s.applyAll(&ep, &ap) }
sched.Schedule(f)
case leases := <-expiredLeaseC:
s.goAttach(func() {
// Increases throughput of expired leases deletion process through parallelization
c := make(chan struct{}, maxPendingRevokes)
for _, lease := range leases {
select {
case c <- struct{}{}:
case <-s.stopping:
return
}
lid := lease.ID
s.goAttach(func() {
s.LeaseRevoke(context.TODO(), &pb.LeaseRevokeRequest{ID: int64(lid)})
<-c
})
}
})
case err := <-s.errorc:
plog.Errorf("%s", err)
plog.Infof("the data-dir used by this member must be removed.")
return
case <-s.stop:
return
}
}
}
