scheduler: graceful shutdown implement #9720
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| Original file line number | Diff line number | Diff line change | ||||||
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| @@ -0,0 +1,306 @@ | ||||||||
| // Copyright 2025 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. | ||||||||
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||||||||
| package schedulers | ||||||||
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||||||||
| import ( | ||||||||
| "net/http" | ||||||||
| "strconv" | ||||||||
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| "github.com/gorilla/mux" | ||||||||
| "github.com/unrolled/render" | ||||||||
| "go.uber.org/zap" | ||||||||
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||||||||
| "github.com/pingcap/log" | ||||||||
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| "github.com/tikv/pd/pkg/core" | ||||||||
| sche "github.com/tikv/pd/pkg/schedule/core" | ||||||||
| "github.com/tikv/pd/pkg/schedule/operator" | ||||||||
| "github.com/tikv/pd/pkg/schedule/plan" | ||||||||
| "github.com/tikv/pd/pkg/schedule/types" | ||||||||
| "github.com/tikv/pd/pkg/utils/keyutil" | ||||||||
| ) | ||||||||
|
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| type stoppingStoreType string | ||||||||
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||||||||
| const ( | ||||||||
| gracefulShutdownStore stoppingStoreType = "graceful-shutdown" | ||||||||
| ) | ||||||||
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| type evictStoppingStoreSchedulerConfig struct { | ||||||||
| baseDefaultSchedulerConfig | ||||||||
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| cluster *core.BasicCluster | ||||||||
| // EvictedStores stores the stopping stores that are being evicted | ||||||||
| EvictedStores []uint64 `json:"evicted-stores"` | ||||||||
| // Batch is used to generate multiple operators by one scheduling | ||||||||
| Batch int `json:"batch"` | ||||||||
| } | ||||||||
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||||||||
| func initEvictStoppingStoreSchedulerConfig() *evictStoppingStoreSchedulerConfig { | ||||||||
| return &evictStoppingStoreSchedulerConfig{ | ||||||||
| baseDefaultSchedulerConfig: newBaseDefaultSchedulerConfig(), | ||||||||
| EvictedStores: make([]uint64, 0), | ||||||||
| Batch: EvictLeaderBatchSize, | ||||||||
| } | ||||||||
| } | ||||||||
|
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||||||||
| func (conf *evictStoppingStoreSchedulerConfig) persistLocked(updateFn func()) error { | ||||||||
| var ( | ||||||||
| oldEvictedStores = conf.EvictedStores | ||||||||
| oldBatch = conf.Batch | ||||||||
| ) | ||||||||
| updateFn() | ||||||||
| if err := conf.save(); err != nil { | ||||||||
| conf.EvictedStores = oldEvictedStores | ||||||||
| conf.Batch = oldBatch | ||||||||
| return err | ||||||||
| } | ||||||||
| return nil | ||||||||
| } | ||||||||
|
|
||||||||
| func (conf *evictStoppingStoreSchedulerConfig) getStores() []uint64 { | ||||||||
| conf.RLock() | ||||||||
| defer conf.RUnlock() | ||||||||
| return conf.EvictedStores | ||||||||
| } | ||||||||
|
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||||||||
| func (*evictStoppingStoreSchedulerConfig) getKeyRangesByID(uint64) []keyutil.KeyRange { | ||||||||
| return []keyutil.KeyRange{keyutil.NewKeyRange("", "")} | ||||||||
| } | ||||||||
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| func (conf *evictStoppingStoreSchedulerConfig) getBatch() int { | ||||||||
| conf.RLock() | ||||||||
| defer conf.RUnlock() | ||||||||
| return conf.Batch | ||||||||
| } | ||||||||
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| func (conf *evictStoppingStoreSchedulerConfig) evictStore() uint64 { | ||||||||
| conf.RLock() | ||||||||
| defer conf.RUnlock() | ||||||||
| if len(conf.EvictedStores) == 0 { | ||||||||
| return 0 | ||||||||
| } | ||||||||
| return conf.EvictedStores[0] | ||||||||
| } | ||||||||
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| func (conf *evictStoppingStoreSchedulerConfig) setStoreAndPersist(id uint64) error { | ||||||||
| conf.Lock() | ||||||||
| defer conf.Unlock() | ||||||||
| return conf.persistLocked(func() { | ||||||||
| conf.EvictedStores = []uint64{id} | ||||||||
| }) | ||||||||
| } | ||||||||
|
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||||||||
| func (conf *evictStoppingStoreSchedulerConfig) clearEvictedAndPersist() (oldID uint64, err error) { | ||||||||
| oldID = conf.evictStore() | ||||||||
| conf.Lock() | ||||||||
| defer conf.Unlock() | ||||||||
| if oldID > 0 { | ||||||||
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|
||||||||
| err = conf.persistLocked(func() { | ||||||||
| conf.EvictedStores = []uint64{} | ||||||||
| }) | ||||||||
| } | ||||||||
| return | ||||||||
| } | ||||||||
|
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||||||||
| type evictStoppingStoreHandler struct { | ||||||||
| rd *render.Render | ||||||||
| config *evictStoppingStoreSchedulerConfig | ||||||||
| } | ||||||||
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||||||||
| func newEvictStoppingStoreHandler(config *evictStoppingStoreSchedulerConfig) http.Handler { | ||||||||
| h := &evictStoppingStoreHandler{ | ||||||||
| config: config, | ||||||||
| rd: render.New(render.Options{IndentJSON: true}), | ||||||||
| } | ||||||||
| router := mux.NewRouter() | ||||||||
| router.HandleFunc("/config", h.updateConfig).Methods(http.MethodPost) | ||||||||
| router.HandleFunc("/list", h.listConfig).Methods(http.MethodGet) | ||||||||
| return router | ||||||||
| } | ||||||||
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||||||||
| func (handler *evictStoppingStoreHandler) updateConfig(w http.ResponseWriter, r *http.Request) { | ||||||||
| handler.rd.JSON(w, http.StatusOK, "Config updated.") | ||||||||
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|
||||||||
| } | ||||||||
|
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||||||||
| func (handler *evictStoppingStoreHandler) listConfig(w http.ResponseWriter, _ *http.Request) { | ||||||||
| handler.config.RLock() | ||||||||
| defer handler.config.RUnlock() | ||||||||
| conf := &evictStoppingStoreSchedulerConfig{ | ||||||||
| Batch: handler.config.Batch, | ||||||||
| EvictedStores: handler.config.EvictedStores, | ||||||||
| } | ||||||||
| handler.rd.JSON(w, http.StatusOK, conf) | ||||||||
| } | ||||||||
|
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||||||||
| type evictStoppingStoreScheduler struct { | ||||||||
| *BaseScheduler | ||||||||
| conf *evictStoppingStoreSchedulerConfig | ||||||||
| handler http.Handler | ||||||||
| } | ||||||||
|
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||||||||
| // ServeHTTP implements the http.Handler interface. | ||||||||
| func (s *evictStoppingStoreScheduler) ServeHTTP(w http.ResponseWriter, r *http.Request) { | ||||||||
| s.handler.ServeHTTP(w, r) | ||||||||
| } | ||||||||
|
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||||||||
| // EncodeConfig implements the Scheduler interface. | ||||||||
| func (s *evictStoppingStoreScheduler) EncodeConfig() ([]byte, error) { | ||||||||
| return EncodeConfig(s.conf) | ||||||||
| } | ||||||||
|
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||||||||
| // ReloadConfig implements the Scheduler interface. | ||||||||
| func (s *evictStoppingStoreScheduler) ReloadConfig() error { | ||||||||
| s.conf.Lock() | ||||||||
| defer s.conf.Unlock() | ||||||||
|
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||||||||
| newCfg := &evictStoppingStoreSchedulerConfig{} | ||||||||
| if err := s.conf.load(newCfg); err != nil { | ||||||||
| return err | ||||||||
| } | ||||||||
| if newCfg.Batch == 0 { | ||||||||
| newCfg.Batch = EvictLeaderBatchSize | ||||||||
| } | ||||||||
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||||||||
| s.conf.EvictedStores = newCfg.EvictedStores | ||||||||
| s.conf.Batch = newCfg.Batch | ||||||||
| return nil | ||||||||
| } | ||||||||
|
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||||||||
| // PrepareConfig implements the Scheduler interface. | ||||||||
| func (s *evictStoppingStoreScheduler) PrepareConfig(cluster sche.SchedulerCluster) error { | ||||||||
| evictStore := s.conf.evictStore() | ||||||||
| if evictStore != 0 { | ||||||||
| if err := cluster.SlowStoreEvicted(evictStore); err != nil { | ||||||||
| return err | ||||||||
| } | ||||||||
| } | ||||||||
| return nil | ||||||||
| } | ||||||||
|
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||||||||
| // CleanConfig implements the Scheduler interface. | ||||||||
| func (s *evictStoppingStoreScheduler) CleanConfig(cluster sche.SchedulerCluster) { | ||||||||
| s.cleanupEvictLeader(cluster) | ||||||||
| } | ||||||||
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| func (s *evictStoppingStoreScheduler) prepareEvictLeader(cluster sche.SchedulerCluster, storeID uint64) error { | ||||||||
| if err := cluster.SlowStoreEvicted(storeID); err != nil { | ||||||||
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|
||||||||
| log.Info("failed to evict stopping store", zap.Uint64("store-id", storeID), zap.Error(err)) | ||||||||
| return err | ||||||||
| } | ||||||||
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||||||||
| if err := s.conf.setStoreAndPersist(storeID); err != nil { | ||||||||
| log.Info("failed to persist evicted stopping store", zap.Uint64("store-id", storeID), zap.Error(err)) | ||||||||
| cluster.SlowStoreRecovered(storeID) | ||||||||
| return err | ||||||||
| } | ||||||||
|
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||||||||
| return nil | ||||||||
| } | ||||||||
|
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||||||||
| func (s *evictStoppingStoreScheduler) cleanupEvictLeader(cluster sche.SchedulerCluster) { | ||||||||
| evictStoppingStore, err := s.conf.clearEvictedAndPersist() | ||||||||
| if err != nil { | ||||||||
| log.Info("evict-stopping-store-scheduler persist config failed", zap.Uint64("store-id", evictStoppingStore)) | ||||||||
|
||||||||
| log.Info("evict-stopping-store-scheduler persist config failed", zap.Uint64("store-id", evictStoppingStore)) | |
| log.Warn("evict-stopping-store-scheduler persist config failed", zap.Uint64("store-id", evictStoppingStore)) | |
| return |
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