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feat: get subtask config and status of v1.0.x from dm-worker (#846)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| // Copyright 2020 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package worker | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| "go.uber.org/zap" | ||
|
|
||
| "github.com/pingcap/dm/dm/pb" | ||
| "github.com/pingcap/dm/pkg/log" | ||
| "github.com/pingcap/dm/pkg/v1workermeta" | ||
| ) | ||
|
|
||
| // OperateV1Meta implements WorkerServer.OperateV1Meta. | ||
| func (s *Server) OperateV1Meta(ctx context.Context, req *pb.OperateV1MetaRequest) (*pb.OperateV1MetaResponse, error) { | ||
| log.L().Info("", zap.String("request", "OperateV1Meta"), zap.Stringer("payload", req)) | ||
|
|
||
| switch req.Op { | ||
| case pb.V1MetaOp_GetV1Meta: | ||
| meta, err := v1workermeta.GetSubtasksMeta() | ||
| if err != nil { | ||
| return &pb.OperateV1MetaResponse{ | ||
| Result: false, | ||
| Msg: err.Error(), | ||
| }, nil | ||
| } | ||
| return &pb.OperateV1MetaResponse{ | ||
| Result: true, | ||
| Meta: meta, | ||
| }, nil | ||
| case pb.V1MetaOp_RemoveV1Meta: | ||
| err := v1workermeta.RemoveSubtasksMeta() | ||
| if err != nil { | ||
| return &pb.OperateV1MetaResponse{ | ||
| Result: false, | ||
| Msg: err.Error(), | ||
| }, nil | ||
| } | ||
| return &pb.OperateV1MetaResponse{ | ||
| Result: true, | ||
| }, nil | ||
| default: | ||
| return &pb.OperateV1MetaResponse{ | ||
| Result: false, | ||
| Msg: fmt.Sprintf("invalid op %s", req.Op.String()), | ||
| }, nil | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| // Copyright 2020 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package v1workermeta | ||
|
|
||
| import ( | ||
| "os" | ||
| "path/filepath" | ||
| "strconv" | ||
|
|
||
| "github.com/BurntSushi/toml" | ||
|
|
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| "github.com/pingcap/dm/dm/config" | ||
| "github.com/pingcap/dm/dm/pb" | ||
| "github.com/pingcap/dm/pkg/terror" | ||
| "github.com/pingcap/dm/pkg/utils" | ||
| ) | ||
|
|
||
| // `var` rather than `const` for testing. | ||
| var ( | ||
| // metaPath is the meta data path in v1.0.x. | ||
| metaPath = "./dm_worker_meta" | ||
| // dbPath is the levelDB path in v1.0.x. | ||
| dbPath = "./dm_worker_meta/kv" | ||
| ) | ||
|
|
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| // v1SubTaskConfig represents the subtask config in v1.0.x. | ||
| type v1SubTaskConfig struct { | ||
| config.SubTaskConfig // embed the subtask config in v2.0.x. | ||
|
|
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| // NOTE: in v1.0.x, `ChunkFilesize` is `int64`, but in v2.0.x it's `string`. | ||
| // (ref: https://github.com/pingcap/dm/pull/713). | ||
| // if we decode data with v1.0.x from TOML directly, | ||
| // an error of `toml: cannot load TOML value of type int64 into a Go string` will be reported, | ||
| // so we overwrite it with another filed which has the same struct tag `chunk-filesize` here. | ||
| // but if set `chunk-filesize: 64` in a YAML file, both v1.0.x (int64) and v2.0.x (string) can support it. | ||
| ChunkFilesize int64 `yaml:"chunk-filesize" toml:"chunk-filesize" json:"chunk-filesize"` // -F, --chunk-filesize | ||
| } | ||
|
|
||
| // GetSubtasksMeta gets all subtasks' meta (config and status) from `dm_worker_meta` in v1.0.x. | ||
| func GetSubtasksMeta() (map[string]*pb.V1SubTaskMeta, error) { | ||
| // check if meta data exist. | ||
| if !utils.IsDirExists(metaPath) || !utils.IsDirExists(dbPath) { | ||
| return nil, nil | ||
| } | ||
|
|
||
| // open levelDB to get subtasks meta. | ||
| db, err := openDB(dbPath, defaultKVConfig) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer db.Close() | ||
|
|
||
| // load subtasks' meta from levelDB. | ||
| meta, err := newMeta(db) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return meta.TasksMeta(), nil | ||
| } | ||
|
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| // RemoveSubtasksMeta removes subtasks' metadata. | ||
| // this is often called after upgraded from v1.0.x to v2.0.x, | ||
| // so no need to handle again after re-started the DM-worker process. | ||
| func RemoveSubtasksMeta() error { | ||
| // check is a valid v1.0.x meta path. | ||
| if !utils.IsDirExists(metaPath) || !utils.IsDirExists(dbPath) { | ||
| return terror.ErrInvalidV1WorkerMetaPath.Generate(filepath.Abs(metaPath)) | ||
| } | ||
|
|
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| // try to open levelDB to check. | ||
| db, err := openDB(dbPath, defaultKVConfig) | ||
| if err != nil { | ||
| return terror.ErrInvalidV1WorkerMetaPath.Generate(filepath.Abs(metaPath)) | ||
| } | ||
| defer db.Close() | ||
|
|
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| return os.RemoveAll(metaPath) | ||
| } | ||
|
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| // SubTaskConfigFromV1TOML gets SubTaskConfig from subtask's TOML data with v1.0.x. | ||
| func SubTaskConfigFromV1TOML(data []byte) (config.SubTaskConfig, error) { | ||
| var v1Cfg v1SubTaskConfig | ||
| _, err := toml.Decode(string(data), &v1Cfg) | ||
| if err != nil { | ||
| return config.SubTaskConfig{}, terror.ErrConfigTomlTransform.Delegate(err, "decode v1 subtask config from data") | ||
| } | ||
|
|
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| cfg := v1Cfg.SubTaskConfig | ||
| cfg.MydumperConfig.ChunkFilesize = strconv.FormatInt(v1Cfg.ChunkFilesize, 10) | ||
| err = cfg.Adjust(true) | ||
| if err != nil { | ||
| return config.SubTaskConfig{}, terror.ErrConfigTomlTransform.Delegate(err, "transform `chunk-filesize`") | ||
| } | ||
|
|
||
| return cfg, nil | ||
| } |
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