130 lines
3.7 KiB
Go
130 lines
3.7 KiB
Go
package state
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import (
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"fmt"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/lib"
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"github.com/hashicorp/go-memdb"
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)
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// Coordinates is used to pull all the coordinates from the snapshot.
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func (s *Snapshot) Coordinates() (memdb.ResultIterator, error) {
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iter, err := s.tx.Get("coordinates", "id")
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if err != nil {
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return nil, err
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}
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return iter, nil
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}
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// Coordinates is used when restoring from a snapshot. For general inserts, use
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// CoordinateBatchUpdate. We do less vetting of the updates here because they
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// already got checked on the way in during a batch update.
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func (s *Restore) Coordinates(idx uint64, updates structs.Coordinates) error {
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for _, update := range updates {
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// Skip any bad data that may have gotten into the database from
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// a bad client in the past.
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if !update.Coord.IsValid() {
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continue
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}
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if err := s.tx.Insert("coordinates", update); err != nil {
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return fmt.Errorf("failed restoring coordinate: %s", err)
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}
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}
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if err := indexUpdateMaxTxn(s.tx, idx, "coordinates"); err != nil {
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return fmt.Errorf("failed updating index: %s", err)
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}
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return nil
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}
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// Coordinate returns a map of coordinates for the given node, indexed by
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// network segment.
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func (s *Store) Coordinate(node string, ws memdb.WatchSet) (uint64, lib.CoordinateSet, error) {
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tx := s.db.Txn(false)
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defer tx.Abort()
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tableIdx := maxIndexTxn(tx, "coordinates")
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iter, err := tx.Get("coordinates", "node", node)
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if err != nil {
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return 0, nil, fmt.Errorf("failed coordinate lookup: %s", err)
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}
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ws.Add(iter.WatchCh())
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results := make(lib.CoordinateSet)
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for raw := iter.Next(); raw != nil; raw = iter.Next() {
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coord := raw.(*structs.Coordinate)
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results[coord.Segment] = coord.Coord
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}
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return tableIdx, results, nil
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}
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// Coordinates queries for all nodes with coordinates.
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func (s *Store) Coordinates(ws memdb.WatchSet) (uint64, structs.Coordinates, error) {
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tx := s.db.Txn(false)
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defer tx.Abort()
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// Get the table index.
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idx := maxIndexTxn(tx, "coordinates")
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// Pull all the coordinates.
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iter, err := tx.Get("coordinates", "id")
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if err != nil {
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return 0, nil, fmt.Errorf("failed coordinate lookup: %s", err)
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}
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ws.Add(iter.WatchCh())
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var results structs.Coordinates
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for coord := iter.Next(); coord != nil; coord = iter.Next() {
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results = append(results, coord.(*structs.Coordinate))
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}
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return idx, results, nil
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}
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// CoordinateBatchUpdate processes a batch of coordinate updates and applies
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// them in a single transaction.
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func (s *Store) CoordinateBatchUpdate(idx uint64, updates structs.Coordinates) error {
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tx := s.db.Txn(true)
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defer tx.Abort()
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// Upsert the coordinates.
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for _, update := range updates {
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// Skip any bad data that may have gotten into the database from
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// a bad client in the past.
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if !update.Coord.IsValid() {
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continue
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}
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// Since the cleanup of coordinates is tied to deletion of
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// nodes, we silently drop any updates for nodes that we don't
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// know about. This might be possible during normal operation
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// if we happen to get a coordinate update for a node that
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// hasn't been able to add itself to the catalog yet. Since we
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// don't carefully sequence this, and since it will fix itself
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// on the next coordinate update from that node, we don't return
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// an error or log anything.
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node, err := tx.First("nodes", "id", update.Node)
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if err != nil {
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return fmt.Errorf("failed node lookup: %s", err)
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}
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if node == nil {
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continue
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}
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if err := tx.Insert("coordinates", update); err != nil {
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return fmt.Errorf("failed inserting coordinate: %s", err)
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}
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}
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// Update the index.
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if err := tx.Insert("index", &IndexEntry{"coordinates", idx}); err != nil {
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return fmt.Errorf("failed updating index: %s", err)
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}
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tx.Commit()
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return nil
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}
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