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dr-autosync: add recover timeout (tikv#6295)
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ref tikv#4399

Signed-off-by: husharp <[email protected]>
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@disksing @ti-chi-bot
disksing authored and ti-chi-bot committed Nov 10, 2023
1 parent e0ab17c commit 1fb4741
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Showing 3 changed files with 62 additions and 28 deletions.
15 changes: 8 additions & 7 deletions server/config/config.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1430,13 +1430,14 @@ func NormalizeReplicationMode(m string) string {

// DRAutoSyncReplicationConfig is the configuration for auto sync mode between 2 data centers.
type DRAutoSyncReplicationConfig struct {
LabelKey string `toml:"label-key" json:"label-key"`
Primary string `toml:"primary" json:"primary"`
DR string `toml:"dr" json:"dr"`
PrimaryReplicas int `toml:"primary-replicas" json:"primary-replicas"`
DRReplicas int `toml:"dr-replicas" json:"dr-replicas"`
WaitStoreTimeout typeutil.Duration `toml:"wait-store-timeout" json:"wait-store-timeout"`
PauseRegionSplit bool `toml:"pause-region-split" json:"pause-region-split,string"`
LabelKey string `toml:"label-key" json:"label-key"`
Primary string `toml:"primary" json:"primary"`
DR string `toml:"dr" json:"dr"`
PrimaryReplicas int `toml:"primary-replicas" json:"primary-replicas"`
DRReplicas int `toml:"dr-replicas" json:"dr-replicas"`
WaitStoreTimeout typeutil.Duration `toml:"wait-store-timeout" json:"wait-store-timeout"`
WaitRecoverTimeout typeutil.Duration `toml:"wait-recover-timeout" json:"wait-recover-timeout"`
PauseRegionSplit bool `toml:"pause-region-split" json:"pause-region-split,string"`
}

func (c *DRAutoSyncReplicationConfig) adjust(meta *configMetaData) {
Expand Down
15 changes: 13 additions & 2 deletions server/replication/replication_mode.go
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Original file line number Diff line number Diff line change
Expand Up @@ -212,6 +212,7 @@ const (
type drAutoSyncStatus struct {
State string `json:"state,omitempty"`
StateID uint64 `json:"state_id,omitempty"`
AsyncStartTime *time.Time `json:"async_start,omitempty"`
RecoverStartTime *time.Time `json:"recover_start,omitempty"`
TotalRegions int `json:"total_regions,omitempty"`
SyncedRegions int `json:"synced_regions,omitempty"`
Expand Down Expand Up @@ -262,7 +263,8 @@ func (m *ModeManager) drSwitchToAsyncWithLock(availableStores []uint64) error {
log.Warn("failed to switch to async state", zap.String("replicate-mode", modeDRAutoSync), errs.ZapError(err))
return err
}
dr := drAutoSyncStatus{State: drStateAsync, StateID: id, AvailableStores: availableStores}
now := time.Now()
dr := drAutoSyncStatus{State: drStateAsync, StateID: id, AvailableStores: availableStores, AsyncStartTime: &now}
if err := m.storage.SaveReplicationStatus(modeDRAutoSync, dr); err != nil {
log.Warn("failed to switch to async state", zap.String("replicate-mode", modeDRAutoSync), errs.ZapError(err))
return err
Expand All @@ -272,6 +274,15 @@ func (m *ModeManager) drSwitchToAsyncWithLock(availableStores []uint64) error {
return nil
}

func (m *ModeManager) drDurationSinceAsyncStart() time.Duration {
m.RLock()
defer m.RUnlock()
if m.drAutoSync.AsyncStartTime == nil {
return 0
}
return time.Since(*m.drAutoSync.AsyncStartTime)
}

func (m *ModeManager) drSwitchToSyncRecover() error {
m.Lock()
defer m.Unlock()
Expand Down Expand Up @@ -471,7 +482,7 @@ func (m *ModeManager) tickUpdateState() {
m.drSwitchToAsync(storeIDs[primaryUp])
}
case drStateAsync:
if canSync {
if canSync && m.drDurationSinceAsyncStart() > m.config.DRAutoSync.WaitRecoverTimeout.Duration {
m.drSwitchToSyncRecover()
break
}
Expand Down
60 changes: 41 additions & 19 deletions server/replication/replication_mode_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ package replication

import (
"context"
"encoding/json"
"errors"
"fmt"
"testing"
Expand Down Expand Up @@ -158,6 +159,20 @@ func newMockReplicator(ids []uint64) *mockFileReplicator {
}
}

func assertLastData(t *testing.T, data string, state string, stateID uint64, availableStores []uint64) {
type status struct {
State string `json:"state"`
StateID uint64 `json:"state_id"`
AvailableStores []uint64 `json:"available_stores"`
}
var s status
err := json.Unmarshal([]byte(data), &s)
require.NoError(t, err)
require.Equal(t, state, s.State)
require.Equal(t, stateID, s.StateID)
require.Equal(t, availableStores, s.AvailableStores)
}

func TestStateSwitch(t *testing.T) {
re := require.New(t)
ctx, cancel := context.WithCancel(context.Background())
Expand Down Expand Up @@ -189,7 +204,7 @@ func TestStateSwitch(t *testing.T) {
stateID := rep.drAutoSync.StateID
re.NotEqual(uint64(0), stateID)
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"sync","state_id":%d}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "sync", stateID, nil)
assertStateIDUpdate := func() {
re.NotEqual(stateID, rep.drAutoSync.StateID)
stateID = rep.drAutoSync.StateID
Expand All @@ -206,7 +221,7 @@ func TestStateSwitch(t *testing.T) {
re.Equal(drStateAsyncWait, rep.drGetState())
assertStateIDUpdate()
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async_wait", stateID, []uint64{1, 2, 3, 4})

re.False(rep.GetReplicationStatus().GetDrAutoSync().GetPauseRegionSplit())
conf.DRAutoSync.PauseRegionSplit = true
Expand All @@ -217,7 +232,7 @@ func TestStateSwitch(t *testing.T) {
rep.tickUpdateState()
assertStateIDUpdate()
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async","state_id":%d,"available_stores":[1,2,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async", stateID, []uint64{1, 2, 3, 4})

// add new store in dr zone.
cluster.AddLabelsStore(5, 1, map[string]string{"zone": "zone2"})
Expand Down Expand Up @@ -267,18 +282,19 @@ func TestStateSwitch(t *testing.T) {
rep.tickUpdateState()
re.Equal(drStateAsyncWait, rep.drGetState())
assertStateIDUpdate()

rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async_wait", stateID, []uint64{1, 2, 3, 4})
setStoreState(cluster, "down", "up", "up", "up", "down", "down")
rep.tickUpdateState()
assertStateIDUpdate()
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[2,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async_wait", stateID, []uint64{2, 3, 4})
setStoreState(cluster, "up", "down", "up", "up", "down", "down")
rep.tickUpdateState()
assertStateIDUpdate()
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async_wait", stateID, []uint64{1, 3, 4})

// async_wait -> async
rep.tickUpdateState()
Expand All @@ -290,26 +306,32 @@ func TestStateSwitch(t *testing.T) {
rep.tickUpdateState()
assertStateIDUpdate()
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async","state_id":%d,"available_stores":[1,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async", stateID, []uint64{1, 3, 4})

// async -> async
setStoreState(cluster, "up", "up", "up", "up", "down", "down")
rep.tickUpdateState()
// store 2 won't be available before it syncs status.
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async","state_id":%d,"available_stores":[1,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async", stateID, []uint64{1, 3, 4})
syncStoreStatus(1, 2, 3, 4)
rep.tickUpdateState()
assertStateIDUpdate()
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async","state_id":%d,"available_stores":[1,2,3,4]}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async", stateID, []uint64{1, 2, 3, 4})

// async -> sync_recover
setStoreState(cluster, "up", "up", "up", "up", "up", "up")
rep.tickUpdateState()
re.Equal(drStateSyncRecover, rep.drGetState())
assertStateIDUpdate()

rep.drSwitchToAsync([]uint64{1, 2, 3, 4, 5})
rep.config.DRAutoSync.WaitRecoverTimeout = typeutil.NewDuration(time.Hour)
rep.tickUpdateState()
re.Equal(drStateAsync, rep.drGetState()) // wait recover timeout

rep.config.DRAutoSync.WaitRecoverTimeout = typeutil.NewDuration(0)
setStoreState(cluster, "down", "up", "up", "up", "up", "up")
rep.tickUpdateState()
re.Equal(drStateSyncRecover, rep.drGetState())
Expand Down Expand Up @@ -386,27 +408,27 @@ func TestReplicateState(t *testing.T) {
stateID := rep.drAutoSync.StateID
// replicate after initialized
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"sync","state_id":%d}`, stateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "sync", stateID, nil)

// repliate state to new member
replicator.memberIDs = append(replicator.memberIDs, 2, 3)
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"sync","state_id":%d}`, stateID), replicator.lastData[2])
re.Equal(fmt.Sprintf(`{"state":"sync","state_id":%d}`, stateID), replicator.lastData[3])
assertLastData(t, replicator.lastData[2], "sync", stateID, nil)
assertLastData(t, replicator.lastData[3], "sync", stateID, nil)

// inject error
replicator.errors[2] = errors.New("failed to persist")
rep.tickUpdateState() // switch async_wait since there is only one zone
newStateID := rep.drAutoSync.StateID
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2]}`, newStateID), replicator.lastData[1])
re.Equal(fmt.Sprintf(`{"state":"sync","state_id":%d}`, stateID), replicator.lastData[2])
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2]}`, newStateID), replicator.lastData[3])
assertLastData(t, replicator.lastData[1], "async_wait", newStateID, []uint64{1, 2})
assertLastData(t, replicator.lastData[2], "sync", stateID, nil)
assertLastData(t, replicator.lastData[3], "async_wait", newStateID, []uint64{1, 2})

// clear error, replicate to node 2 next time
delete(replicator.errors, 2)
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2]}`, newStateID), replicator.lastData[2])
assertLastData(t, replicator.lastData[2], "async_wait", newStateID, []uint64{1, 2})
}

func TestAsynctimeout(t *testing.T) {
Expand Down Expand Up @@ -636,7 +658,7 @@ func TestComplexPlacementRules(t *testing.T) {
rep.tickUpdateState()
re.Equal(drStateAsyncWait, rep.drGetState())
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2,3,4,5,6]}`, rep.drAutoSync.StateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async_wait", rep.drAutoSync.StateID, []uint64{1, 2, 3, 4, 5, 6})

// reset to sync
setStoreState(cluster, "up", "up", "up", "up", "up", "up", "up", "up", "up", "up")
Expand Down Expand Up @@ -697,7 +719,7 @@ func TestComplexPlacementRules2(t *testing.T) {
rep.tickUpdateState()
re.Equal(drStateAsyncWait, rep.drGetState())
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2,3,4]}`, rep.drAutoSync.StateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async_wait", rep.drAutoSync.StateID, []uint64{1, 2, 3, 4})
}

func TestComplexPlacementRules3(t *testing.T) {
Expand Down Expand Up @@ -736,7 +758,7 @@ func TestComplexPlacementRules3(t *testing.T) {
rep.tickUpdateState()
re.Equal(drStateAsyncWait, rep.drGetState())
rep.tickReplicateStatus()
re.Equal(fmt.Sprintf(`{"state":"async_wait","state_id":%d,"available_stores":[1,2,3,4]}`, rep.drAutoSync.StateID), replicator.lastData[1])
assertLastData(t, replicator.lastData[1], "async_wait", rep.drAutoSync.StateID, []uint64{1, 2, 3, 4})
}

func genRegions(cluster *mockcluster.Cluster, stateID uint64, n int) []*core.RegionInfo {
Expand Down

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