package state import ( "fmt" "strings" "github.com/hashicorp/go-memdb" ) // newDBSchema creates and returns the memdb schema for the Store. func newDBSchema() *memdb.DBSchema { db := &memdb.DBSchema{Tables: make(map[string]*memdb.TableSchema)} addTableSchemas(db, authMethodsTableSchema, autopilotConfigTableSchema, bindingRulesTableSchema, caBuiltinProviderTableSchema, caConfigTableSchema, caRootTableSchema, checksTableSchema, configTableSchema, coordinatesTableSchema, federationStateTableSchema, freeVirtualIPTableSchema, gatewayServicesTableSchema, indexTableSchema, intentionsTableSchema, kindServiceNameTableSchema, kvsTableSchema, meshTopologyTableSchema, nodesTableSchema, peeringTableSchema, peeringTrustBundlesTableSchema, policiesTableSchema, preparedQueriesTableSchema, rolesTableSchema, servicesTableSchema, serviceVirtualIPTableSchema, sessionChecksTableSchema, sessionsTableSchema, systemMetadataTableSchema, tokensTableSchema, tombstonesTableSchema, usageTableSchema, ) withEnterpriseSchema(db) return db } func addTableSchemas(db *memdb.DBSchema, schemas ...func() *memdb.TableSchema) { for _, fn := range schemas { schema := fn() if _, ok := db.Tables[schema.Name]; ok { panic(fmt.Sprintf("duplicate table name: %s", schema.Name)) } db.Tables[schema.Name] = schema } } // IndexEntry keeps a record of the last index of a table or entity within a table. type IndexEntry struct { Key string Value uint64 } const tableIndex = "index" // indexTableSchema returns a new table schema used for tracking various the // latest raft index for a table or entities within a table. // // The index table is necessary for tables that do not use tombstones. If the latest // items in the table are deleted, the max index of a table would appear to go // backwards. With the index table we can keep track of the latest update to a // table, even when that update is a delete of the most recent item. func indexTableSchema() *memdb.TableSchema { return &memdb.TableSchema{ Name: tableIndex, Indexes: map[string]*memdb.IndexSchema{ indexID: { Name: indexID, AllowMissing: false, Unique: true, Indexer: indexerSingle{ readIndex: indexFromString, writeIndex: indexNameFromIndexEntry, }, }, }, } } func indexNameFromIndexEntry(raw interface{}) ([]byte, error) { p, ok := raw.(*IndexEntry) if !ok { return nil, fmt.Errorf("unexpected type %T for IndexEntry index", raw) } if p.Key == "" { return nil, errMissingValueForIndex } var b indexBuilder b.String(strings.ToLower(p.Key)) return b.Bytes(), nil } func indexFromString(raw interface{}) ([]byte, error) { q, ok := raw.(string) if !ok { return nil, fmt.Errorf("unexpected type %T for string prefix query", raw) } var b indexBuilder b.String(strings.ToLower(q)) return b.Bytes(), nil }