package elastic import ( "context" "fmt" "math" "strings" "github.com/chrislusf/seaweedfs/weed/filer" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" weed_util "github.com/chrislusf/seaweedfs/weed/util" jsoniter "github.com/json-iterator/go" elastic "github.com/olivere/elastic/v7" ) var ( indexType = "_doc" indexPrefix = ".seaweedfs_" indexKV = ".seaweedfs_kv_entries" kvMappings = ` { "mappings": { "enabled": false, "properties": { "Value":{ "type": "binary" } } } }` ) type ESEntry struct { ParentId string `json:"ParentId"` Entry *filer.Entry } type ESKVEntry struct { Value []byte `json:"Value"` } func init() { filer.Stores = append(filer.Stores, &ElasticStore{}) } type ElasticStore struct { client *elastic.Client maxPageSize int } func (store *ElasticStore) GetName() string { return "elastic7" } func (store *ElasticStore) Initialize(configuration weed_util.Configuration, prefix string) (err error) { options := []elastic.ClientOptionFunc{} servers := configuration.GetStringSlice(prefix + "servers") options = append(options, elastic.SetURL(servers...)) username := configuration.GetString(prefix + "username") password := configuration.GetString(prefix + "password") if username != "" && password != "" { options = append(options, elastic.SetBasicAuth(username, password)) } options = append(options, elastic.SetSniff(configuration.GetBool(prefix+"sniff_enabled"))) options = append(options, elastic.SetHealthcheck(configuration.GetBool(prefix+"healthcheck_enabled"))) store.maxPageSize = configuration.GetInt(prefix + "index.max_result_window") if store.maxPageSize <= 0 { store.maxPageSize = 10000 } glog.Infof("filer store elastic endpoints: %v.", servers) return store.initialize(options) } func (store *ElasticStore) initialize(options []elastic.ClientOptionFunc) (err error) { ctx := context.Background() store.client, err = elastic.NewClient(options...) if err != nil { return fmt.Errorf("init elastic %v.", err) } if ok, err := store.client.IndexExists(indexKV).Do(ctx); err == nil && !ok { _, err = store.client.CreateIndex(indexKV).Body(kvMappings).Do(ctx) if err != nil { return fmt.Errorf("create index(%s) %v.", indexKV, err) } } return nil } func (store *ElasticStore) BeginTransaction(ctx context.Context) (context.Context, error) { return ctx, nil } func (store *ElasticStore) CommitTransaction(ctx context.Context) error { return nil } func (store *ElasticStore) RollbackTransaction(ctx context.Context) error { return nil } func (store *ElasticStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath weed_util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) { return lastFileName, filer.ErrUnsupportedListDirectoryPrefixed } func (store *ElasticStore) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) { index := getIndex(entry.FullPath, false) dir, _ := entry.FullPath.DirAndName() id := weed_util.Md5String([]byte(entry.FullPath)) esEntry := &ESEntry{ ParentId: weed_util.Md5String([]byte(dir)), Entry: entry, } value, err := jsoniter.Marshal(esEntry) if err != nil { glog.Errorf("insert entry(%s) %v.", string(entry.FullPath), err) return fmt.Errorf("insert entry %v.", err) } _, err = store.client.Index(). Index(index). Type(indexType). Id(id). BodyJson(string(value)). Do(ctx) if err != nil { glog.Errorf("insert entry(%s) %v.", string(entry.FullPath), err) return fmt.Errorf("insert entry %v.", err) } return nil } func (store *ElasticStore) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) { return store.InsertEntry(ctx, entry) } func (store *ElasticStore) FindEntry(ctx context.Context, fullpath weed_util.FullPath) (entry *filer.Entry, err error) { index := getIndex(fullpath, false) id := weed_util.Md5String([]byte(fullpath)) searchResult, err := store.client.Get(). Index(index). Type(indexType). Id(id). Do(ctx) if elastic.IsNotFound(err) { return nil, filer_pb.ErrNotFound } if searchResult != nil && searchResult.Found { esEntry := &ESEntry{ ParentId: "", Entry: &filer.Entry{}, } err := jsoniter.Unmarshal(searchResult.Source, esEntry) return esEntry.Entry, err } glog.Errorf("find entry(%s),%v.", string(fullpath), err) return nil, filer_pb.ErrNotFound } func (store *ElasticStore) DeleteEntry(ctx context.Context, fullpath weed_util.FullPath) (err error) { index := getIndex(fullpath, false) id := weed_util.Md5String([]byte(fullpath)) if strings.Count(string(fullpath), "/") == 1 { return store.deleteIndex(ctx, index) } return store.deleteEntry(ctx, index, id) } func (store *ElasticStore) deleteIndex(ctx context.Context, index string) (err error) { deleteResult, err := store.client.DeleteIndex(index).Do(ctx) if elastic.IsNotFound(err) || (err == nil && deleteResult.Acknowledged) { return nil } glog.Errorf("delete index(%s) %v.", index, err) return err } func (store *ElasticStore) deleteEntry(ctx context.Context, index, id string) (err error) { deleteResult, err := store.client.Delete(). Index(index). Type(indexType). Id(id). Do(ctx) if err == nil { if deleteResult.Result == "deleted" || deleteResult.Result == "not_found" { return nil } } glog.Errorf("delete entry(index:%s,_id:%s) %v.", index, id, err) return fmt.Errorf("delete entry %v.", err) } func (store *ElasticStore) DeleteFolderChildren(ctx context.Context, fullpath weed_util.FullPath) (err error) { _, err = store.ListDirectoryEntries(ctx, fullpath, "", false, math.MaxInt32, func(entry *filer.Entry) bool { if err := store.DeleteEntry(ctx, entry.FullPath); err != nil { glog.Errorf("elastic delete %s: %v.", entry.FullPath, err) return false } return true }) return } func (store *ElasticStore) ListDirectoryEntries(ctx context.Context, dirPath weed_util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) { return store.listDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, eachEntryFunc) } func (store *ElasticStore) listDirectoryEntries( ctx context.Context, fullpath weed_util.FullPath, startFileName string, inclusive bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) { first := true index := getIndex(fullpath, true) nextStart := "" parentId := weed_util.Md5String([]byte(fullpath)) if _, err = store.client.Refresh(index).Do(ctx); err != nil { if elastic.IsNotFound(err) { store.client.CreateIndex(index).Do(ctx) return } } for { result := &elastic.SearchResult{} if (startFileName == "" && first) || inclusive { if result, err = store.search(ctx, index, parentId); err != nil { glog.Errorf("search (%s,%s,%t,%d) %v.", string(fullpath), startFileName, inclusive, limit, err) return } } else { fullPath := string(fullpath) + "/" + startFileName if !first { fullPath = nextStart } after := weed_util.Md5String([]byte(fullPath)) if result, err = store.searchAfter(ctx, index, parentId, after); err != nil { glog.Errorf("searchAfter (%s,%s,%t,%d) %v.", string(fullpath), startFileName, inclusive, limit, err) return } } first = false for _, hit := range result.Hits.Hits { esEntry := &ESEntry{ ParentId: "", Entry: &filer.Entry{}, } if err := jsoniter.Unmarshal(hit.Source, esEntry); err == nil { limit-- if limit < 0 { return lastFileName, nil } nextStart = string(esEntry.Entry.FullPath) fileName := esEntry.Entry.FullPath.Name() if fileName == startFileName && !inclusive { continue } if !eachEntryFunc(esEntry.Entry) { break } lastFileName = fileName } } if len(result.Hits.Hits) < store.maxPageSize { break } } return } func (store *ElasticStore) search(ctx context.Context, index, parentId string) (result *elastic.SearchResult, err error) { if count, err := store.client.Count(index).Do(ctx); err == nil && count == 0 { return &elastic.SearchResult{ Hits: &elastic.SearchHits{ Hits: make([]*elastic.SearchHit, 0)}, }, nil } queryResult, err := store.client.Search(). Index(index). Query(elastic.NewMatchQuery("ParentId", parentId)). Size(store.maxPageSize). Sort("_id", false). Do(ctx) return queryResult, err } func (store *ElasticStore) searchAfter(ctx context.Context, index, parentId, after string) (result *elastic.SearchResult, err error) { queryResult, err := store.client.Search(). Index(index). Query(elastic.NewMatchQuery("ParentId", parentId)). SearchAfter(after). Size(store.maxPageSize). Sort("_id", false). Do(ctx) return queryResult, err } func (store *ElasticStore) Shutdown() { store.client.Stop() } func getIndex(fullpath weed_util.FullPath, isDirectory bool) string { path := strings.Split(string(fullpath), "/") if isDirectory && len(path) >= 2 { return indexPrefix + strings.ToLower(path[1]) } if len(path) > 2 { return indexPrefix + strings.ToLower(path[1]) } if len(path) == 2 { return indexPrefix } return "" }