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scheduler: add conflict detect for grant hot leader scheduler (tikv#4903
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ref tikv#4399

Signed-off-by: lhy1024 <[email protected]>
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@lhy1024
lhy1024 authored Sep 25, 2024
1 parent 8e9443a commit 7907679
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Showing 3 changed files with 139 additions and 39 deletions.
38 changes: 38 additions & 0 deletions server/api/scheduler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,9 @@ import (
"github.com/pingcap/errors"
"github.com/pingcap/log"
"github.com/tikv/pd/pkg/errs"
"github.com/tikv/pd/pkg/mcs/utils/constant"
"github.com/tikv/pd/pkg/schedule/types"
"github.com/tikv/pd/pkg/slice"
"github.com/tikv/pd/pkg/utils/apiutil"
"github.com/tikv/pd/server"
"github.com/unrolled/render"
Expand Down Expand Up @@ -143,6 +145,15 @@ func (h *schedulerHandler) CreateScheduler(w http.ResponseWriter, r *http.Reques
}
collector(strconv.FormatUint(limit, 10))
case types.GrantHotRegionScheduler:
isExist, err := h.isSchedulerExist(types.BalanceHotRegionScheduler)
if err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
if isExist {
h.r.JSON(w, http.StatusBadRequest, "balance-hot-region-scheduler is running, please remove it first")
return
}
leaderID, ok := input["store-leader-id"].(string)
if !ok {
h.r.JSON(w, http.StatusBadRequest, "missing leader id")
Expand All @@ -155,6 +166,16 @@ func (h *schedulerHandler) CreateScheduler(w http.ResponseWriter, r *http.Reques
}
collector(leaderID)
collector(peerIDs)
case types.BalanceHotRegionScheduler:
isExist, err := h.isSchedulerExist(types.GrantHotRegionScheduler)
if err != nil {
h.r.JSON(w, http.StatusInternalServerError, err.Error())
return
}
if isExist {
h.r.JSON(w, http.StatusBadRequest, "grant-hot-region-scheduler is running, please remove it first")
return
}
}

if err := h.AddScheduler(tp, args...); err != nil {
Expand Down Expand Up @@ -246,6 +267,23 @@ func (h *schedulerHandler) PauseOrResumeScheduler(w http.ResponseWriter, r *http
h.r.JSON(w, http.StatusOK, "Pause or resume the scheduler successfully.")
}

func (h *schedulerHandler) isSchedulerExist(scheduler types.CheckerSchedulerType) (bool, error) {
rc, err := h.GetRaftCluster()
if err != nil {
return false, err
}
if rc.IsServiceIndependent(constant.SchedulingServiceName) {
handlers := rc.GetSchedulerHandlers()
_, ok := handlers[scheduler.String()]
return ok, nil
}
schedulers := rc.GetSchedulers()
if slice.Contains(schedulers, scheduler.String()) {
return !rc.GetSchedulerConfig().IsSchedulerDisabled(scheduler), nil
}
return false, nil
}

type schedulerConfigHandler struct {
svr *server.Server
rd *render.Render
Expand Down
7 changes: 4 additions & 3 deletions tools/pd-ctl/pdctl/command/scheduler.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -355,9 +355,10 @@ func NewSplitBucketSchedulerCommand() *cobra.Command {
// NewGrantHotRegionSchedulerCommand returns a command to add a grant-hot-region-scheduler.
func NewGrantHotRegionSchedulerCommand() *cobra.Command {
c := &cobra.Command{
Use: "grant-hot-region-scheduler <store_leader_id> <store_leader_id,store_peer_id_1,store_peer_id_2>",
Short: "add a scheduler to grant hot region to fixed stores",
Run: addSchedulerForGrantHotRegionCommandFunc,
Use: "grant-hot-region-scheduler <store_leader_id> <store_leader_id,store_peer_id_1,store_peer_id_2>",
Short: `add a scheduler to grant hot region to fixed stores.
Note: If there is balance-hot-region-scheduler running, please remove it first, otherwise grant-hot-region-scheduler will not work.`,
Run: addSchedulerForGrantHotRegionCommandFunc,
}
return c
}
Expand Down
133 changes: 97 additions & 36 deletions tools/pd-ctl/tests/scheduler/scheduler_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -490,34 +490,6 @@ func (suite *schedulerTestSuite) checkSchedulerConfig(cluster *pdTests.TestClust
"balance-hot-region-scheduler": true,
})

// test grant hot region scheduler config
checkSchedulerCommand(re, cmd, pdAddr, []string{"-u", pdAddr, "scheduler", "add", "grant-hot-region-scheduler", "1", "1,2,3"}, map[string]bool{
"balance-region-scheduler": true,
"balance-leader-scheduler": true,
"balance-hot-region-scheduler": true,
"grant-hot-region-scheduler": true,
})
var conf3 map[string]any
expected3 := map[string]any{
"store-id": []any{float64(1), float64(2), float64(3)},
"store-leader-id": float64(1),
}
mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", "grant-hot-region-scheduler"}, &conf3)
re.Equal(expected3, conf3)

echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", "grant-hot-region-scheduler", "set", "2", "1,2,3"}, nil)
re.Contains(echo, "Success!")
expected3["store-leader-id"] = float64(2)
testutil.Eventually(re, func() bool {
mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", "grant-hot-region-scheduler"}, &conf3)
return reflect.DeepEqual(expected3, conf3)
})
checkSchedulerCommand(re, cmd, pdAddr, []string{"-u", pdAddr, "scheduler", "remove", "grant-hot-region-scheduler"}, map[string]bool{
"balance-region-scheduler": true,
"balance-leader-scheduler": true,
"balance-hot-region-scheduler": true,
})

// test shuffle hot region scheduler
echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "shuffle-hot-region-scheduler"}, nil)
re.Contains(echo, "Success!")
Expand Down Expand Up @@ -587,6 +559,103 @@ func (suite *schedulerTestSuite) checkSchedulerConfig(cluster *pdTests.TestClust
re.Contains(echo, "Success!")
}

func (suite *schedulerTestSuite) TestGrantLeaderScheduler() {
suite.env.RunTestBasedOnMode(suite.checkGrantLeaderScheduler)
}

func (suite *schedulerTestSuite) checkGrantLeaderScheduler(cluster *pdTests.TestCluster) {
re := suite.Require()
pdAddr := cluster.GetConfig().GetClientURL()
cmd := ctl.GetRootCmd()

stores := []*metapb.Store{
{
Id: 1,
State: metapb.StoreState_Up,
LastHeartbeat: time.Now().UnixNano(),
},
{
Id: 2,
State: metapb.StoreState_Up,
LastHeartbeat: time.Now().UnixNano(),
},
{
Id: 3,
State: metapb.StoreState_Up,
LastHeartbeat: time.Now().UnixNano(),
},
{
Id: 4,
State: metapb.StoreState_Up,
LastHeartbeat: time.Now().UnixNano(),
},
}
for _, store := range stores {
pdTests.MustPutStore(re, cluster, store)
}

// note: because pdqsort is an unstable sort algorithm, set ApproximateSize for this region.
pdTests.MustPutRegion(re, cluster, 1, 1, []byte("a"), []byte("b"), core.SetApproximateSize(10))

suite.checkDefaultSchedulers(re, cmd, pdAddr)

// case 1: add grant-hot-region-scheduler when balance-hot-region-scheduler is running
echo := mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "grant-hot-region-scheduler", "1", "1,2,3"}, nil)
re.Contains(echo, "balance-hot-region-scheduler is running, please remove it first")

// case 2: add grant-hot-region-scheduler when balance-hot-region-scheduler is paused
echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "pause", "balance-hot-region-scheduler", "60"}, nil)
re.Contains(echo, "Success!")
suite.checkDefaultSchedulers(re, cmd, pdAddr)
echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "grant-hot-region-scheduler", "1", "1,2,3"}, nil)
re.Contains(echo, "balance-hot-region-scheduler is running, please remove it first")

// case 3: add grant-hot-region-scheduler when balance-hot-region-scheduler is disabled
checkSchedulerCommand(re, cmd, pdAddr, []string{"-u", pdAddr, "scheduler", "remove", "balance-hot-region-scheduler"}, map[string]bool{
"balance-region-scheduler": true,
"balance-leader-scheduler": true,
"evict-slow-store-scheduler": true,
})

checkSchedulerCommand(re, cmd, pdAddr, []string{"-u", pdAddr, "scheduler", "add", "grant-hot-region-scheduler", "1", "1,2,3"}, map[string]bool{
"balance-region-scheduler": true,
"balance-leader-scheduler": true,
"grant-hot-region-scheduler": true,
"evict-slow-store-scheduler": true,
})

// case 4: test grant-hot-region-scheduler config
var conf3 map[string]any
expected3 := map[string]any{
"store-id": []any{float64(1), float64(2), float64(3)},
"store-leader-id": float64(1),
}
mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", "grant-hot-region-scheduler"}, &conf3)
re.Equal(expected3, conf3)

echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", "grant-hot-region-scheduler", "set", "2", "1,2,3"}, nil)
re.Contains(echo, "Success!")
expected3["store-leader-id"] = float64(2)
testutil.Eventually(re, func() bool {
mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", "grant-hot-region-scheduler"}, &conf3)
return reflect.DeepEqual(expected3, conf3)
})

// case 5: remove grant-hot-region-scheduler
echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "balance-hot-region-scheduler"}, nil)
re.Contains(echo, "grant-hot-region-scheduler is running, please remove it first")

checkSchedulerCommand(re, cmd, pdAddr, []string{"-u", pdAddr, "scheduler", "remove", "grant-hot-region-scheduler"}, map[string]bool{
"balance-region-scheduler": true,
"balance-leader-scheduler": true,
"evict-slow-store-scheduler": true,
})

echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "balance-hot-region-scheduler"}, nil)
re.Contains(echo, "Success!")
suite.checkDefaultSchedulers(re, cmd, pdAddr)
}

func (suite *schedulerTestSuite) TestHotRegionSchedulerConfig() {
suite.env.RunTestBasedOnMode(suite.checkHotRegionSchedulerConfig)
}
Expand Down Expand Up @@ -650,14 +719,6 @@ func (suite *schedulerTestSuite) checkHotRegionSchedulerConfig(cluster *pdTests.
return reflect.DeepEqual(expect, conf1)
})
}
// scheduler show command
expected := map[string]bool{
"balance-region-scheduler": true,
"balance-leader-scheduler": true,
"balance-hot-region-scheduler": true,
"evict-slow-store-scheduler": true,
}
checkSchedulerCommand(re, cmd, pdAddr, nil, expected)
var conf map[string]any
mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", "balance-hot-region-scheduler", "list"}, &conf)
re.Equal(expected1, conf)
Expand Down

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