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coordinator_test.go
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coordinator_test.go
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// Copyright 2016 TiKV Project Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cluster
import (
"context"
"math/rand"
"sync"
"testing"
"time"
. "github.com/pingcap/check"
"github.com/pingcap/failpoint"
"github.com/pingcap/kvproto/pkg/eraftpb"
"github.com/pingcap/kvproto/pkg/metapb"
"github.com/pingcap/kvproto/pkg/pdpb"
"github.com/tikv/pd/pkg/mock/mockhbstream"
"github.com/tikv/pd/pkg/testutil"
"github.com/tikv/pd/pkg/typeutil"
"github.com/tikv/pd/server/config"
"github.com/tikv/pd/server/core"
"github.com/tikv/pd/server/core/storelimit"
"github.com/tikv/pd/server/schedule"
"github.com/tikv/pd/server/schedule/hbstream"
"github.com/tikv/pd/server/schedule/operator"
"github.com/tikv/pd/server/schedulers"
"github.com/tikv/pd/server/statistics"
"github.com/tikv/pd/server/storage"
)
func newTestOperator(regionID uint64, regionEpoch *metapb.RegionEpoch, kind operator.OpKind, steps ...operator.OpStep) *operator.Operator {
return operator.NewTestOperator(regionID, regionEpoch, kind, steps...)
}
func (c *testCluster) AllocPeer(storeID uint64) (*metapb.Peer, error) {
id, err := c.GetAllocator().Alloc()
if err != nil {
return nil, err
}
return &metapb.Peer{Id: id, StoreId: storeID}, nil
}
func (c *testCluster) addRegionStore(storeID uint64, regionCount int, regionSizes ...uint64) error {
var regionSize uint64
if len(regionSizes) == 0 {
regionSize = uint64(regionCount) * 10
} else {
regionSize = regionSizes[0]
}
stats := &pdpb.StoreStats{}
stats.Capacity = 100 * (1 << 30)
stats.UsedSize = regionSize * (1 << 20)
stats.Available = stats.Capacity - stats.UsedSize
newStore := core.NewStoreInfo(&metapb.Store{Id: storeID},
core.SetStoreStats(stats),
core.SetRegionCount(regionCount),
core.SetRegionSize(int64(regionSize)),
core.SetLastHeartbeatTS(time.Now()),
)
c.SetStoreLimit(storeID, storelimit.AddPeer, 60)
c.SetStoreLimit(storeID, storelimit.RemovePeer, 60)
c.Lock()
defer c.Unlock()
return c.putStoreLocked(newStore)
}
func (c *testCluster) addLeaderRegion(regionID uint64, leaderStoreID uint64, followerStoreIDs ...uint64) error {
region := newTestRegionMeta(regionID)
leader, _ := c.AllocPeer(leaderStoreID)
region.Peers = []*metapb.Peer{leader}
for _, followerStoreID := range followerStoreIDs {
peer, _ := c.AllocPeer(followerStoreID)
region.Peers = append(region.Peers, peer)
}
regionInfo := core.NewRegionInfo(region, leader, core.SetApproximateSize(10), core.SetApproximateKeys(10))
return c.putRegion(regionInfo)
}
func (c *testCluster) updateLeaderCount(storeID uint64, leaderCount int) error {
store := c.GetStore(storeID)
newStore := store.Clone(
core.SetLeaderCount(leaderCount),
core.SetLeaderSize(int64(leaderCount)*10),
)
c.Lock()
defer c.Unlock()
return c.putStoreLocked(newStore)
}
func (c *testCluster) addLeaderStore(storeID uint64, leaderCount int) error {
stats := &pdpb.StoreStats{}
newStore := core.NewStoreInfo(&metapb.Store{Id: storeID},
core.SetStoreStats(stats),
core.SetLeaderCount(leaderCount),
core.SetLeaderSize(int64(leaderCount)*10),
core.SetLastHeartbeatTS(time.Now()),
)
c.SetStoreLimit(storeID, storelimit.AddPeer, 60)
c.SetStoreLimit(storeID, storelimit.RemovePeer, 60)
c.Lock()
defer c.Unlock()
return c.putStoreLocked(newStore)
}
func (c *testCluster) setStoreDown(storeID uint64) error {
store := c.GetStore(storeID)
newStore := store.Clone(
core.UpStore(),
core.SetLastHeartbeatTS(time.Time{}),
)
c.Lock()
defer c.Unlock()
return c.putStoreLocked(newStore)
}
func (c *testCluster) setStoreOffline(storeID uint64) error {
store := c.GetStore(storeID)
newStore := store.Clone(core.OfflineStore(false))
c.Lock()
defer c.Unlock()
return c.putStoreLocked(newStore)
}
func (c *testCluster) LoadRegion(regionID uint64, followerStoreIDs ...uint64) error {
// regions load from etcd will have no leader
region := newTestRegionMeta(regionID)
region.Peers = []*metapb.Peer{}
for _, id := range followerStoreIDs {
peer, _ := c.AllocPeer(id)
region.Peers = append(region.Peers, peer)
}
return c.putRegion(core.NewRegionInfo(region, nil))
}
var _ = Suite(&testCoordinatorSuite{})
type testCoordinatorSuite struct {
ctx context.Context
cancel context.CancelFunc
}
func (s *testCoordinatorSuite) SetUpSuite(c *C) {
s.ctx, s.cancel = context.WithCancel(context.Background())
c.Assert(failpoint.Enable("github.com/tikv/pd/server/schedule/unexpectedOperator", "return(true)"), IsNil)
}
func (s *testCoordinatorSuite) TearDownSuite(c *C) {
s.cancel()
}
func (s *testCoordinatorSuite) TestBasic(c *C) {
tc, co, cleanup := prepare(nil, nil, nil, c)
defer cleanup()
oc := co.opController
c.Assert(tc.addLeaderRegion(1, 1), IsNil)
op1 := newTestOperator(1, tc.GetRegion(1).GetRegionEpoch(), operator.OpLeader)
oc.AddWaitingOperator(op1)
c.Assert(oc.OperatorCount(operator.OpLeader), Equals, uint64(1))
c.Assert(oc.GetOperator(1).RegionID(), Equals, op1.RegionID())
// Region 1 already has an operator, cannot add another one.
op2 := newTestOperator(1, tc.GetRegion(1).GetRegionEpoch(), operator.OpRegion)
oc.AddWaitingOperator(op2)
c.Assert(oc.OperatorCount(operator.OpRegion), Equals, uint64(0))
// Remove the operator manually, then we can add a new operator.
c.Assert(oc.RemoveOperator(op1), IsTrue)
op3 := newTestOperator(1, tc.GetRegion(1).GetRegionEpoch(), operator.OpRegion)
oc.AddWaitingOperator(op3)
c.Assert(oc.OperatorCount(operator.OpRegion), Equals, uint64(1))
c.Assert(oc.GetOperator(1).RegionID(), Equals, op3.RegionID())
}
func (s *testCoordinatorSuite) TestDispatch(c *C) {
tc, co, cleanup := prepare(nil, nil, nil, c)
defer cleanup()
co.prepareChecker.isPrepared = true
// Transfer peer from store 4 to store 1.
c.Assert(tc.addRegionStore(4, 40), IsNil)
c.Assert(tc.addRegionStore(3, 30), IsNil)
c.Assert(tc.addRegionStore(2, 20), IsNil)
c.Assert(tc.addRegionStore(1, 10), IsNil)
c.Assert(tc.addLeaderRegion(1, 2, 3, 4), IsNil)
// Transfer leader from store 4 to store 2.
c.Assert(tc.updateLeaderCount(4, 50), IsNil)
c.Assert(tc.updateLeaderCount(3, 50), IsNil)
c.Assert(tc.updateLeaderCount(2, 20), IsNil)
c.Assert(tc.updateLeaderCount(1, 10), IsNil)
c.Assert(tc.addLeaderRegion(2, 4, 3, 2), IsNil)
co.run()
// Wait for schedule and turn off balance.
waitOperator(c, co, 1)
testutil.CheckTransferPeer(c, co.opController.GetOperator(1), operator.OpKind(0), 4, 1)
c.Assert(co.removeScheduler(schedulers.BalanceRegionName), IsNil)
waitOperator(c, co, 2)
testutil.CheckTransferLeader(c, co.opController.GetOperator(2), operator.OpKind(0), 4, 2)
c.Assert(co.removeScheduler(schedulers.BalanceLeaderName), IsNil)
stream := mockhbstream.NewHeartbeatStream()
// Transfer peer.
region := tc.GetRegion(1).Clone()
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitAddLearner(c, stream, region, 1)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitPromoteLearner(c, stream, region, 1)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitRemovePeer(c, stream, region, 4)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
// Transfer leader.
region = tc.GetRegion(2).Clone()
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitTransferLeader(c, stream, region, 2)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
}
func dispatchHeartbeat(co *coordinator, region *core.RegionInfo, stream hbstream.HeartbeatStream) error {
co.hbStreams.BindStream(region.GetLeader().GetStoreId(), stream)
if err := co.cluster.putRegion(region.Clone()); err != nil {
return err
}
co.opController.Dispatch(region, schedule.DispatchFromHeartBeat)
return nil
}
func (s *testCoordinatorSuite) TestCollectMetrics(c *C) {
tc, co, cleanup := prepare(nil, func(tc *testCluster) {
tc.regionStats = statistics.NewRegionStatistics(tc.GetOpts(), nil)
}, func(co *coordinator) { co.run() }, c)
defer cleanup()
// Make sure there are no problem when concurrent write and read
var wg sync.WaitGroup
count := 10
wg.Add(count + 1)
for i := 0; i <= count; i++ {
go func(i int) {
defer wg.Done()
for j := 0; j < 1000; j++ {
c.Assert(tc.addRegionStore(uint64(i%5), rand.Intn(200)), IsNil)
}
}(i)
}
for i := 0; i < 1000; i++ {
co.collectHotSpotMetrics()
co.collectSchedulerMetrics()
co.cluster.collectClusterMetrics()
}
co.resetHotSpotMetrics()
co.resetSchedulerMetrics()
co.cluster.resetClusterMetrics()
wg.Wait()
}
func prepare(setCfg func(*config.ScheduleConfig), setTc func(*testCluster), run func(*coordinator), c *C) (*testCluster, *coordinator, func()) {
ctx, cancel := context.WithCancel(context.Background())
cfg, opt, err := newTestScheduleConfig()
c.Assert(err, IsNil)
if setCfg != nil {
setCfg(cfg)
}
tc := newTestCluster(ctx, opt)
hbStreams := hbstream.NewTestHeartbeatStreams(ctx, tc.getClusterID(), tc, true /* need to run */)
if setTc != nil {
setTc(tc)
}
co := newCoordinator(ctx, tc.RaftCluster, hbStreams)
if run != nil {
run(co)
}
return tc, co, func() {
co.stop()
co.wg.Wait()
hbStreams.Close()
cancel()
}
}
func (s *testCoordinatorSuite) checkRegion(c *C, tc *testCluster, co *coordinator, regionID uint64, expectAddOperator int) {
ops := co.checkers.CheckRegion(tc.GetRegion(regionID))
if ops == nil {
c.Assert(expectAddOperator, Equals, 0)
} else {
c.Assert(co.opController.AddWaitingOperator(ops...), Equals, expectAddOperator)
}
}
func (s *testCoordinatorSuite) TestCheckRegion(c *C) {
tc, co, cleanup := prepare(nil, nil, nil, c)
hbStreams, opt := co.hbStreams, tc.opt
defer cleanup()
c.Assert(tc.addRegionStore(4, 4), IsNil)
c.Assert(tc.addRegionStore(3, 3), IsNil)
c.Assert(tc.addRegionStore(2, 2), IsNil)
c.Assert(tc.addRegionStore(1, 1), IsNil)
c.Assert(tc.addLeaderRegion(1, 2, 3), IsNil)
s.checkRegion(c, tc, co, 1, 1)
testutil.CheckAddPeer(c, co.opController.GetOperator(1), operator.OpReplica, 1)
s.checkRegion(c, tc, co, 1, 0)
r := tc.GetRegion(1)
p := &metapb.Peer{Id: 1, StoreId: 1, Role: metapb.PeerRole_Learner}
r = r.Clone(
core.WithAddPeer(p),
core.WithPendingPeers(append(r.GetPendingPeers(), p)),
)
c.Assert(tc.putRegion(r), IsNil)
s.checkRegion(c, tc, co, 1, 0)
tc = newTestCluster(s.ctx, opt)
co = newCoordinator(s.ctx, tc.RaftCluster, hbStreams)
c.Assert(tc.addRegionStore(4, 4), IsNil)
c.Assert(tc.addRegionStore(3, 3), IsNil)
c.Assert(tc.addRegionStore(2, 2), IsNil)
c.Assert(tc.addRegionStore(1, 1), IsNil)
c.Assert(tc.putRegion(r), IsNil)
s.checkRegion(c, tc, co, 1, 0)
r = r.Clone(core.WithPendingPeers(nil))
c.Assert(tc.putRegion(r), IsNil)
s.checkRegion(c, tc, co, 1, 1)
op := co.opController.GetOperator(1)
c.Assert(op.Len(), Equals, 1)
c.Assert(op.Step(0).(operator.PromoteLearner).ToStore, Equals, uint64(1))
s.checkRegion(c, tc, co, 1, 0)
}
func (s *testCoordinatorSuite) TestCheckerIsBusy(c *C) {
tc, co, cleanup := prepare(func(cfg *config.ScheduleConfig) {
cfg.ReplicaScheduleLimit = 0 // ensure replica checker is busy
cfg.MergeScheduleLimit = 10
}, nil, nil, c)
defer cleanup()
c.Assert(tc.addRegionStore(1, 0), IsNil)
num := 1 + typeutil.MaxUint64(tc.opt.GetReplicaScheduleLimit(), tc.opt.GetMergeScheduleLimit())
var operatorKinds = []operator.OpKind{
operator.OpReplica, operator.OpRegion | operator.OpMerge,
}
for i, operatorKind := range operatorKinds {
for j := uint64(0); j < num; j++ {
regionID := j + uint64(i+1)*num
c.Assert(tc.addLeaderRegion(regionID, 1), IsNil)
switch operatorKind {
case operator.OpReplica:
op := newTestOperator(regionID, tc.GetRegion(regionID).GetRegionEpoch(), operatorKind)
c.Assert(co.opController.AddWaitingOperator(op), Equals, 1)
case operator.OpRegion | operator.OpMerge:
if regionID%2 == 1 {
ops, err := operator.CreateMergeRegionOperator("merge-region", co.cluster, tc.GetRegion(regionID), tc.GetRegion(regionID-1), operator.OpMerge)
c.Assert(err, IsNil)
c.Assert(co.opController.AddWaitingOperator(ops...), Equals, len(ops))
}
}
}
}
s.checkRegion(c, tc, co, num, 0)
}
func (s *testCoordinatorSuite) TestReplica(c *C) {
tc, co, cleanup := prepare(func(cfg *config.ScheduleConfig) {
// Turn off balance.
cfg.LeaderScheduleLimit = 0
cfg.RegionScheduleLimit = 0
}, nil, func(co *coordinator) { co.run() }, c)
defer cleanup()
c.Assert(tc.addRegionStore(1, 1), IsNil)
c.Assert(tc.addRegionStore(2, 2), IsNil)
c.Assert(tc.addRegionStore(3, 3), IsNil)
c.Assert(tc.addRegionStore(4, 4), IsNil)
stream := mockhbstream.NewHeartbeatStream()
// Add peer to store 1.
c.Assert(tc.addLeaderRegion(1, 2, 3), IsNil)
region := tc.GetRegion(1)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitAddLearner(c, stream, region, 1)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitPromoteLearner(c, stream, region, 1)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
// Peer in store 3 is down, remove peer in store 3 and add peer to store 4.
c.Assert(tc.setStoreDown(3), IsNil)
downPeer := &pdpb.PeerStats{
Peer: region.GetStorePeer(3),
DownSeconds: 24 * 60 * 60,
}
region = region.Clone(
core.WithDownPeers(append(region.GetDownPeers(), downPeer)),
)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitAddLearner(c, stream, region, 4)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitPromoteLearner(c, stream, region, 4)
region = region.Clone(core.WithDownPeers(nil))
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
// Remove peer from store 4.
c.Assert(tc.addLeaderRegion(2, 1, 2, 3, 4), IsNil)
region = tc.GetRegion(2)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitRemovePeer(c, stream, region, 4)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
// Remove offline peer directly when it's pending.
c.Assert(tc.addLeaderRegion(3, 1, 2, 3), IsNil)
c.Assert(tc.setStoreOffline(3), IsNil)
region = tc.GetRegion(3)
region = region.Clone(core.WithPendingPeers([]*metapb.Peer{region.GetStorePeer(3)}))
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
}
func (s *testCoordinatorSuite) TestCheckCache(c *C) {
tc, co, cleanup := prepare(func(cfg *config.ScheduleConfig) {
// Turn off replica scheduling.
cfg.ReplicaScheduleLimit = 0
}, nil, nil, c)
defer cleanup()
c.Assert(tc.addRegionStore(1, 0), IsNil)
c.Assert(tc.addRegionStore(2, 0), IsNil)
c.Assert(tc.addRegionStore(3, 0), IsNil)
// Add a peer with two replicas.
c.Assert(tc.addLeaderRegion(1, 2, 3), IsNil)
c.Assert(failpoint.Enable("github.com/tikv/pd/server/cluster/break-patrol", `return`), IsNil)
// case 1: operator cannot be created due to replica-schedule-limit restriction
co.wg.Add(1)
co.patrolRegions()
c.Assert(co.checkers.GetWaitingRegions(), HasLen, 1)
// cancel the replica-schedule-limit restriction
opt := tc.GetOpts()
cfg := opt.GetScheduleConfig()
cfg.ReplicaScheduleLimit = 10
tc.GetOpts().SetScheduleConfig(cfg)
co.wg.Add(1)
co.patrolRegions()
oc := co.opController
c.Assert(oc.GetOperators(), HasLen, 1)
c.Assert(co.checkers.GetWaitingRegions(), HasLen, 0)
// case 2: operator cannot be created due to store limit restriction
oc.RemoveOperator(oc.GetOperator(1))
tc.SetStoreLimit(1, storelimit.AddPeer, 0)
co.wg.Add(1)
co.patrolRegions()
c.Assert(co.checkers.GetWaitingRegions(), HasLen, 1)
// cancel the store limit restriction
tc.SetStoreLimit(1, storelimit.AddPeer, 10)
time.Sleep(1 * time.Second)
co.wg.Add(1)
co.patrolRegions()
c.Assert(oc.GetOperators(), HasLen, 1)
c.Assert(co.checkers.GetWaitingRegions(), HasLen, 0)
co.wg.Wait()
c.Assert(failpoint.Disable("github.com/tikv/pd/server/cluster/break-patrol"), IsNil)
}
func (s *testCoordinatorSuite) TestPeerState(c *C) {
tc, co, cleanup := prepare(nil, nil, func(co *coordinator) { co.run() }, c)
defer cleanup()
// Transfer peer from store 4 to store 1.
c.Assert(tc.addRegionStore(1, 10), IsNil)
c.Assert(tc.addRegionStore(2, 10), IsNil)
c.Assert(tc.addRegionStore(3, 10), IsNil)
c.Assert(tc.addRegionStore(4, 40), IsNil)
c.Assert(tc.addLeaderRegion(1, 2, 3, 4), IsNil)
stream := mockhbstream.NewHeartbeatStream()
// Wait for schedule.
waitOperator(c, co, 1)
testutil.CheckTransferPeer(c, co.opController.GetOperator(1), operator.OpKind(0), 4, 1)
region := tc.GetRegion(1).Clone()
// Add new peer.
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitAddLearner(c, stream, region, 1)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitPromoteLearner(c, stream, region, 1)
// If the new peer is pending, the operator will not finish.
region = region.Clone(core.WithPendingPeers(append(region.GetPendingPeers(), region.GetStorePeer(1))))
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
c.Assert(co.opController.GetOperator(region.GetID()), NotNil)
// The new peer is not pending now, the operator will finish.
// And we will proceed to remove peer in store 4.
region = region.Clone(core.WithPendingPeers(nil))
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitRemovePeer(c, stream, region, 4)
c.Assert(tc.addLeaderRegion(1, 1, 2, 3), IsNil)
region = tc.GetRegion(1).Clone()
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitNoResponse(c, stream)
}
func (s *testCoordinatorSuite) TestShouldRun(c *C) {
tc, co, cleanup := prepare(nil, nil, nil, c)
tc.RaftCluster.coordinator = co
defer cleanup()
c.Assert(tc.addLeaderStore(1, 5), IsNil)
c.Assert(tc.addLeaderStore(2, 2), IsNil)
c.Assert(tc.addLeaderStore(3, 0), IsNil)
c.Assert(tc.addLeaderStore(4, 0), IsNil)
c.Assert(tc.LoadRegion(1, 1, 2, 3), IsNil)
c.Assert(tc.LoadRegion(2, 1, 2, 3), IsNil)
c.Assert(tc.LoadRegion(3, 1, 2, 3), IsNil)
c.Assert(tc.LoadRegion(4, 1, 2, 3), IsNil)
c.Assert(tc.LoadRegion(5, 1, 2, 3), IsNil)
c.Assert(tc.LoadRegion(6, 2, 1, 4), IsNil)
c.Assert(tc.LoadRegion(7, 2, 1, 4), IsNil)
c.Assert(co.shouldRun(), IsFalse)
c.Assert(tc.core.Regions.GetStoreRegionCount(4), Equals, 2)
tbl := []struct {
regionID uint64
shouldRun bool
}{
{1, false},
{2, false},
{3, false},
{4, false},
{5, false},
// store4 needs collect two region
{6, false},
{7, true},
}
for _, t := range tbl {
r := tc.GetRegion(t.regionID)
nr := r.Clone(core.WithLeader(r.GetPeers()[0]))
c.Assert(tc.processRegionHeartbeat(nr), IsNil)
c.Assert(co.shouldRun(), Equals, t.shouldRun)
}
nr := &metapb.Region{Id: 6, Peers: []*metapb.Peer{}}
newRegion := core.NewRegionInfo(nr, nil)
c.Assert(tc.processRegionHeartbeat(newRegion), NotNil)
c.Assert(co.prepareChecker.sum, Equals, 7)
}
func (s *testCoordinatorSuite) TestShouldRunWithNonLeaderRegions(c *C) {
tc, co, cleanup := prepare(nil, nil, nil, c)
tc.RaftCluster.coordinator = co
defer cleanup()
c.Assert(tc.addLeaderStore(1, 10), IsNil)
c.Assert(tc.addLeaderStore(2, 0), IsNil)
c.Assert(tc.addLeaderStore(3, 0), IsNil)
for i := 0; i < 10; i++ {
c.Assert(tc.LoadRegion(uint64(i+1), 1, 2, 3), IsNil)
}
c.Assert(co.shouldRun(), IsFalse)
c.Assert(tc.core.Regions.GetStoreRegionCount(1), Equals, 10)
tbl := []struct {
regionID uint64
shouldRun bool
}{
{1, false},
{2, false},
{3, false},
{4, false},
{5, false},
{6, false},
{7, false},
{8, true},
}
for _, t := range tbl {
r := tc.GetRegion(t.regionID)
nr := r.Clone(core.WithLeader(r.GetPeers()[0]))
c.Assert(tc.processRegionHeartbeat(nr), IsNil)
c.Assert(co.shouldRun(), Equals, t.shouldRun)
}
nr := &metapb.Region{Id: 8, Peers: []*metapb.Peer{}}
newRegion := core.NewRegionInfo(nr, nil)
c.Assert(tc.processRegionHeartbeat(newRegion), NotNil)
c.Assert(co.prepareChecker.sum, Equals, 8)
// Now, after server is prepared, there exist some regions with no leader.
c.Assert(tc.GetRegion(9).GetLeader().GetStoreId(), Equals, uint64(0))
c.Assert(tc.GetRegion(10).GetLeader().GetStoreId(), Equals, uint64(0))
}
func (s *testCoordinatorSuite) TestAddScheduler(c *C) {
tc, co, cleanup := prepare(nil, nil, func(co *coordinator) { co.run() }, c)
defer cleanup()
c.Assert(co.schedulers, HasLen, 3)
c.Assert(co.removeScheduler(schedulers.BalanceLeaderName), IsNil)
c.Assert(co.removeScheduler(schedulers.BalanceRegionName), IsNil)
c.Assert(co.removeScheduler(schedulers.HotRegionName), IsNil)
c.Assert(co.schedulers, HasLen, 0)
stream := mockhbstream.NewHeartbeatStream()
// Add stores 1,2,3
c.Assert(tc.addLeaderStore(1, 1), IsNil)
c.Assert(tc.addLeaderStore(2, 1), IsNil)
c.Assert(tc.addLeaderStore(3, 1), IsNil)
// Add regions 1 with leader in store 1 and followers in stores 2,3
c.Assert(tc.addLeaderRegion(1, 1, 2, 3), IsNil)
// Add regions 2 with leader in store 2 and followers in stores 1,3
c.Assert(tc.addLeaderRegion(2, 2, 1, 3), IsNil)
// Add regions 3 with leader in store 3 and followers in stores 1,2
c.Assert(tc.addLeaderRegion(3, 3, 1, 2), IsNil)
oc := co.opController
gls, err := schedule.CreateScheduler(schedulers.GrantLeaderType, oc, storage.NewStorageWithMemoryBackend(), schedule.ConfigSliceDecoder(schedulers.GrantLeaderType, []string{"0"}))
c.Assert(err, IsNil)
c.Assert(co.addScheduler(gls), NotNil)
c.Assert(co.removeScheduler(gls.GetName()), NotNil)
gls, err = schedule.CreateScheduler(schedulers.GrantLeaderType, oc, storage.NewStorageWithMemoryBackend(), schedule.ConfigSliceDecoder(schedulers.GrantLeaderType, []string{"1"}))
c.Assert(err, IsNil)
c.Assert(co.addScheduler(gls), IsNil)
// Transfer all leaders to store 1.
waitOperator(c, co, 2)
region2 := tc.GetRegion(2)
c.Assert(dispatchHeartbeat(co, region2, stream), IsNil)
region2 = waitTransferLeader(c, stream, region2, 1)
c.Assert(dispatchHeartbeat(co, region2, stream), IsNil)
waitNoResponse(c, stream)
waitOperator(c, co, 3)
region3 := tc.GetRegion(3)
c.Assert(dispatchHeartbeat(co, region3, stream), IsNil)
region3 = waitTransferLeader(c, stream, region3, 1)
c.Assert(dispatchHeartbeat(co, region3, stream), IsNil)
waitNoResponse(c, stream)
}
func (s *testCoordinatorSuite) TestPersistScheduler(c *C) {
tc, co, cleanup := prepare(nil, nil, func(co *coordinator) { co.run() }, c)
hbStreams := co.hbStreams
defer cleanup()
// Add stores 1,2
c.Assert(tc.addLeaderStore(1, 1), IsNil)
c.Assert(tc.addLeaderStore(2, 1), IsNil)
c.Assert(co.schedulers, HasLen, 3)
oc := co.opController
storage := tc.RaftCluster.storage
gls1, err := schedule.CreateScheduler(schedulers.GrantLeaderType, oc, storage, schedule.ConfigSliceDecoder(schedulers.GrantLeaderType, []string{"1"}))
c.Assert(err, IsNil)
c.Assert(co.addScheduler(gls1, "1"), IsNil)
evict, err := schedule.CreateScheduler(schedulers.EvictLeaderType, oc, storage, schedule.ConfigSliceDecoder(schedulers.EvictLeaderType, []string{"2"}))
c.Assert(err, IsNil)
c.Assert(co.addScheduler(evict, "2"), IsNil)
c.Assert(co.schedulers, HasLen, 5)
sches, _, err := storage.LoadAllScheduleConfig()
c.Assert(err, IsNil)
c.Assert(sches, HasLen, 5)
c.Assert(co.removeScheduler(schedulers.BalanceLeaderName), IsNil)
c.Assert(co.removeScheduler(schedulers.BalanceRegionName), IsNil)
c.Assert(co.removeScheduler(schedulers.HotRegionName), IsNil)
c.Assert(co.schedulers, HasLen, 2)
c.Assert(co.cluster.opt.Persist(storage), IsNil)
co.stop()
co.wg.Wait()
// make a new coordinator for testing
// whether the schedulers added or removed in dynamic way are recorded in opt
_, newOpt, err := newTestScheduleConfig()
c.Assert(err, IsNil)
_, err = schedule.CreateScheduler(schedulers.ShuffleRegionType, oc, storage, schedule.ConfigJSONDecoder([]byte("null")))
c.Assert(err, IsNil)
// suppose we add a new default enable scheduler
config.DefaultSchedulers = append(config.DefaultSchedulers, config.SchedulerConfig{Type: "shuffle-region"})
defer func() {
config.DefaultSchedulers = config.DefaultSchedulers[:len(config.DefaultSchedulers)-1]
}()
c.Assert(newOpt.GetSchedulers(), HasLen, 3)
c.Assert(newOpt.Reload(storage), IsNil)
// only remains 3 items with independent config.
sches, _, err = storage.LoadAllScheduleConfig()
c.Assert(err, IsNil)
c.Assert(sches, HasLen, 3)
// option have 6 items because the default scheduler do not remove.
c.Assert(newOpt.GetSchedulers(), HasLen, 6)
c.Assert(newOpt.Persist(storage), IsNil)
tc.RaftCluster.opt = newOpt
co = newCoordinator(s.ctx, tc.RaftCluster, hbStreams)
co.run()
c.Assert(co.schedulers, HasLen, 3)
co.stop()
co.wg.Wait()
// suppose restart PD again
_, newOpt, err = newTestScheduleConfig()
c.Assert(err, IsNil)
c.Assert(newOpt.Reload(storage), IsNil)
tc.RaftCluster.opt = newOpt
co = newCoordinator(s.ctx, tc.RaftCluster, hbStreams)
co.run()
c.Assert(co.schedulers, HasLen, 3)
bls, err := schedule.CreateScheduler(schedulers.BalanceLeaderType, oc, storage, schedule.ConfigSliceDecoder(schedulers.BalanceLeaderType, []string{"", ""}))
c.Assert(err, IsNil)
c.Assert(co.addScheduler(bls), IsNil)
brs, err := schedule.CreateScheduler(schedulers.BalanceRegionType, oc, storage, schedule.ConfigSliceDecoder(schedulers.BalanceRegionType, []string{"", ""}))
c.Assert(err, IsNil)
c.Assert(co.addScheduler(brs), IsNil)
c.Assert(co.schedulers, HasLen, 5)
// the scheduler option should contain 6 items
// the `hot scheduler` are disabled
c.Assert(co.cluster.opt.GetSchedulers(), HasLen, 6)
c.Assert(co.removeScheduler(schedulers.GrantLeaderName), IsNil)
// the scheduler that is not enable by default will be completely deleted
c.Assert(co.cluster.opt.GetSchedulers(), HasLen, 5)
c.Assert(co.schedulers, HasLen, 4)
c.Assert(co.cluster.opt.Persist(co.cluster.storage), IsNil)
co.stop()
co.wg.Wait()
_, newOpt, err = newTestScheduleConfig()
c.Assert(err, IsNil)
c.Assert(newOpt.Reload(co.cluster.storage), IsNil)
tc.RaftCluster.opt = newOpt
co = newCoordinator(s.ctx, tc.RaftCluster, hbStreams)
co.run()
c.Assert(co.schedulers, HasLen, 4)
c.Assert(co.removeScheduler(schedulers.EvictLeaderName), IsNil)
c.Assert(co.schedulers, HasLen, 3)
}
func (s *testCoordinatorSuite) TestRemoveScheduler(c *C) {
tc, co, cleanup := prepare(func(cfg *config.ScheduleConfig) {
cfg.ReplicaScheduleLimit = 0
}, nil, func(co *coordinator) { co.run() }, c)
hbStreams := co.hbStreams
defer cleanup()
// Add stores 1,2
c.Assert(tc.addLeaderStore(1, 1), IsNil)
c.Assert(tc.addLeaderStore(2, 1), IsNil)
c.Assert(co.schedulers, HasLen, 3)
oc := co.opController
storage := tc.RaftCluster.storage
gls1, err := schedule.CreateScheduler(schedulers.GrantLeaderType, oc, storage, schedule.ConfigSliceDecoder(schedulers.GrantLeaderType, []string{"1"}))
c.Assert(err, IsNil)
c.Assert(co.addScheduler(gls1, "1"), IsNil)
c.Assert(co.schedulers, HasLen, 4)
sches, _, err := storage.LoadAllScheduleConfig()
c.Assert(err, IsNil)
c.Assert(sches, HasLen, 4)
// remove all schedulers
c.Assert(co.removeScheduler(schedulers.BalanceLeaderName), IsNil)
c.Assert(co.removeScheduler(schedulers.BalanceRegionName), IsNil)
c.Assert(co.removeScheduler(schedulers.HotRegionName), IsNil)
c.Assert(co.removeScheduler(schedulers.GrantLeaderName), IsNil)
// all removed
sches, _, err = storage.LoadAllScheduleConfig()
c.Assert(err, IsNil)
c.Assert(sches, HasLen, 0)
c.Assert(co.schedulers, HasLen, 0)
c.Assert(co.cluster.opt.Persist(co.cluster.storage), IsNil)
co.stop()
co.wg.Wait()
// suppose restart PD again
_, newOpt, err := newTestScheduleConfig()
c.Assert(err, IsNil)
c.Assert(newOpt.Reload(tc.storage), IsNil)
tc.RaftCluster.opt = newOpt
co = newCoordinator(s.ctx, tc.RaftCluster, hbStreams)
co.run()
c.Assert(co.schedulers, HasLen, 0)
// the option remains default scheduler
c.Assert(co.cluster.opt.GetSchedulers(), HasLen, 3)
co.stop()
co.wg.Wait()
}
func (s *testCoordinatorSuite) TestRestart(c *C) {
tc, co, cleanup := prepare(func(cfg *config.ScheduleConfig) {
// Turn off balance, we test add replica only.
cfg.LeaderScheduleLimit = 0
cfg.RegionScheduleLimit = 0
}, nil, func(co *coordinator) { co.run() }, c)
hbStreams := co.hbStreams
defer cleanup()
// Add 3 stores (1, 2, 3) and a region with 1 replica on store 1.
c.Assert(tc.addRegionStore(1, 1), IsNil)
c.Assert(tc.addRegionStore(2, 2), IsNil)
c.Assert(tc.addRegionStore(3, 3), IsNil)
c.Assert(tc.addLeaderRegion(1, 1), IsNil)
region := tc.GetRegion(1)
co.prepareChecker.collect(region)
// Add 1 replica on store 2.
stream := mockhbstream.NewHeartbeatStream()
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitAddLearner(c, stream, region, 2)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitPromoteLearner(c, stream, region, 2)
co.stop()
co.wg.Wait()
// Recreate coordinator then add another replica on store 3.
co = newCoordinator(s.ctx, tc.RaftCluster, hbStreams)
co.prepareChecker.collect(region)
co.run()
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
region = waitAddLearner(c, stream, region, 3)
c.Assert(dispatchHeartbeat(co, region, stream), IsNil)
waitPromoteLearner(c, stream, region, 3)
}
func BenchmarkPatrolRegion(b *testing.B) {
mergeLimit := uint64(4100)
regionNum := 10000
tc, co, cleanup := prepare(func(cfg *config.ScheduleConfig) {
cfg.MergeScheduleLimit = mergeLimit
}, nil, nil, &C{})
defer cleanup()
tc.opt.SetSplitMergeInterval(time.Duration(0))
for i := 1; i < 4; i++ {
if err := tc.addRegionStore(uint64(i), regionNum, 96); err != nil {
return
}
}
for i := 0; i < regionNum; i++ {
if err := tc.addLeaderRegion(uint64(i), 1, 2, 3); err != nil {
return
}
}
listen := make(chan int)
go func() {
oc := co.opController
listen <- 0
for {
if oc.OperatorCount(operator.OpMerge) == mergeLimit {
co.cancel()
return
}
}
}()
<-listen
co.wg.Add(1)
b.ResetTimer()
co.patrolRegions()
}
func waitOperator(c *C, co *coordinator, regionID uint64) {
testutil.WaitUntil(c, func() bool {
return co.opController.GetOperator(regionID) != nil
})
}
var _ = Suite(&testOperatorControllerSuite{})
type testOperatorControllerSuite struct {
ctx context.Context
cancel context.CancelFunc
}
func (s *testOperatorControllerSuite) SetUpSuite(c *C) {
s.ctx, s.cancel = context.WithCancel(context.Background())
c.Assert(failpoint.Enable("github.com/tikv/pd/server/schedule/unexpectedOperator", "return(true)"), IsNil)
}
func (s *testOperatorControllerSuite) TearDownSuite(c *C) {
s.cancel()
}
func (s *testOperatorControllerSuite) TestOperatorCount(c *C) {
tc, co, cleanup := prepare(nil, nil, nil, c)
defer cleanup()
oc := co.opController
c.Assert(oc.OperatorCount(operator.OpLeader), Equals, uint64(0))
c.Assert(oc.OperatorCount(operator.OpRegion), Equals, uint64(0))
c.Assert(tc.addLeaderRegion(1, 1), IsNil)
c.Assert(tc.addLeaderRegion(2, 2), IsNil)
{
op1 := newTestOperator(1, tc.GetRegion(1).GetRegionEpoch(), operator.OpLeader)
oc.AddWaitingOperator(op1)
c.Assert(oc.OperatorCount(operator.OpLeader), Equals, uint64(1)) // 1:leader
op2 := newTestOperator(2, tc.GetRegion(2).GetRegionEpoch(), operator.OpLeader)
oc.AddWaitingOperator(op2)
c.Assert(oc.OperatorCount(operator.OpLeader), Equals, uint64(2)) // 1:leader, 2:leader
c.Assert(oc.RemoveOperator(op1), IsTrue)
c.Assert(oc.OperatorCount(operator.OpLeader), Equals, uint64(1)) // 2:leader
}
{
op1 := newTestOperator(1, tc.GetRegion(1).GetRegionEpoch(), operator.OpRegion)
oc.AddWaitingOperator(op1)
c.Assert(oc.OperatorCount(operator.OpRegion), Equals, uint64(1)) // 1:region 2:leader
c.Assert(oc.OperatorCount(operator.OpLeader), Equals, uint64(1))
op2 := newTestOperator(2, tc.GetRegion(2).GetRegionEpoch(), operator.OpRegion)
op2.SetPriorityLevel(core.HighPriority)
oc.AddWaitingOperator(op2)
c.Assert(oc.OperatorCount(operator.OpRegion), Equals, uint64(2)) // 1:region 2:region
c.Assert(oc.OperatorCount(operator.OpLeader), Equals, uint64(0))
}
}
func (s *testOperatorControllerSuite) TestStoreOverloaded(c *C) {
tc, co, cleanup := prepare(nil, nil, nil, c)
defer cleanup()
oc := co.opController
lb, err := schedule.CreateScheduler(schedulers.BalanceRegionType, oc, tc.storage, schedule.ConfigSliceDecoder(schedulers.BalanceRegionType, []string{"", ""}))
c.Assert(err, IsNil)
opt := tc.GetOpts()
c.Assert(tc.addRegionStore(4, 100), IsNil)
c.Assert(tc.addRegionStore(3, 100), IsNil)
c.Assert(tc.addRegionStore(2, 100), IsNil)
c.Assert(tc.addRegionStore(1, 10), IsNil)
c.Assert(tc.addLeaderRegion(1, 2, 3, 4), IsNil)
region := tc.GetRegion(1).Clone(core.SetApproximateSize(60))
tc.putRegion(region)
start := time.Now()
{
ops := lb.Schedule(tc)
c.Assert(ops, HasLen, 1)
op1 := ops[0]
c.Assert(op1, NotNil)
c.Assert(oc.AddOperator(op1), IsTrue)
c.Assert(oc.RemoveOperator(op1), IsTrue)
}
for {
time.Sleep(time.Millisecond * 10)
ops := lb.Schedule(tc)
if time.Since(start) > time.Second {
break
}
c.Assert(ops, IsNil)
}
// reset all stores' limit
// scheduling one time needs 1/10 seconds
opt.SetAllStoresLimit(storelimit.AddPeer, 600)
opt.SetAllStoresLimit(storelimit.RemovePeer, 600)
time.Sleep(time.Second)
for i := 0; i < 10; i++ {
ops := lb.Schedule(tc)
c.Assert(ops, HasLen, 1)
op := ops[0]
c.Assert(oc.AddOperator(op), IsTrue)
c.Assert(oc.RemoveOperator(op), IsTrue)
}
// sleep 1 seconds to make sure that the token is filled up
time.Sleep(time.Second)
for i := 0; i < 100; i++ {
c.Assert(lb.Schedule(tc), NotNil)
}
}