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ddl: use a global owner manager instance for DDL, to avoid owner chan…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // Copyright 2024 PingCAP, Inc. | ||
| // | ||
| // 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 ddl | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/google/uuid" | ||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/failpoint" | ||
| "github.com/pingcap/tidb/pkg/config" | ||
| "github.com/pingcap/tidb/pkg/kv" | ||
| "github.com/pingcap/tidb/pkg/owner" | ||
| storepkg "github.com/pingcap/tidb/pkg/store" | ||
| "github.com/pingcap/tidb/pkg/util/logutil" | ||
| clientv3 "go.etcd.io/etcd/client/v3" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| var globalOwnerManager = &ownerManager{} | ||
|
|
||
| // StartOwnerManager starts a global DDL owner manager. | ||
| func StartOwnerManager(ctx context.Context, store kv.Storage) error { | ||
| return globalOwnerManager.Start(ctx, store) | ||
| } | ||
|
|
||
| // CloseOwnerManager closes the global DDL owner manager. | ||
| func CloseOwnerManager() { | ||
| globalOwnerManager.Close() | ||
| } | ||
|
|
||
| // ownerManager is used to manage lifecycle of a global DDL owner manager which | ||
| // we only want it to init session once, to avoid DDL owner change after upgrade. | ||
| type ownerManager struct { | ||
| etcdCli *clientv3.Client | ||
| id string | ||
| ownerMgr owner.Manager | ||
| started bool | ||
| } | ||
|
|
||
| // Start starts the TiDBInstance. | ||
| func (om *ownerManager) Start(ctx context.Context, store kv.Storage) error { | ||
| // BR might start domain multiple times, we need to avoid it. when BR have refactored | ||
| // this part, we can remove this. | ||
| if om.started { | ||
| return nil | ||
| } | ||
| if config.GetGlobalConfig().Store != "tikv" { | ||
| return nil | ||
| } | ||
| cli, err := storepkg.NewEtcdCli(store) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| failpoint.InjectCall("injectEtcdClient", &cli) | ||
| if cli == nil { | ||
| return errors.New("etcd client is nil, maybe the server is not started with PD") | ||
| } | ||
| om.id = uuid.New().String() | ||
| om.etcdCli = cli | ||
| om.ownerMgr = owner.NewOwnerManager(ctx, om.etcdCli, Prompt, om.id, DDLOwnerKey) | ||
| om.started = true | ||
| return nil | ||
| } | ||
|
|
||
| // Close closes the TiDBInstance. | ||
| func (om *ownerManager) Close() { | ||
| if om.ownerMgr != nil { | ||
| om.ownerMgr.Close() | ||
| } | ||
| if om.etcdCli != nil { | ||
| if err := om.etcdCli.Close(); err != nil { | ||
| logutil.BgLogger().Error("close etcd client failed", zap.Error(err)) | ||
| } | ||
| } | ||
| om.started = false | ||
| } | ||
|
|
||
| func (om *ownerManager) ID() string { | ||
| return om.id | ||
| } | ||
|
|
||
| func (om *ownerManager) OwnerManager() owner.Manager { | ||
| return om.ownerMgr | ||
| } |
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