118 lines
3.7 KiB
Go
118 lines
3.7 KiB
Go
package state
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/hashicorp/consul/consul/structs"
|
|
"github.com/hashicorp/go-memdb"
|
|
"github.com/hashicorp/serf/coordinate"
|
|
)
|
|
|
|
// Coordinates is used to pull all the coordinates from the snapshot.
|
|
func (s *StateSnapshot) Coordinates() (memdb.ResultIterator, error) {
|
|
iter, err := s.tx.Get("coordinates", "id")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return iter, nil
|
|
}
|
|
|
|
// Coordinates is used when restoring from a snapshot. For general inserts, use
|
|
// CoordinateBatchUpdate. We do less vetting of the updates here because they
|
|
// already got checked on the way in during a batch update.
|
|
func (s *StateRestore) Coordinates(idx uint64, updates structs.Coordinates) error {
|
|
for _, update := range updates {
|
|
if err := s.tx.Insert("coordinates", update); err != nil {
|
|
return fmt.Errorf("failed restoring coordinate: %s", err)
|
|
}
|
|
}
|
|
|
|
if err := indexUpdateMaxTxn(s.tx, idx, "coordinates"); err != nil {
|
|
return fmt.Errorf("failed updating index: %s", err)
|
|
}
|
|
|
|
s.watches.Arm("coordinates")
|
|
return nil
|
|
}
|
|
|
|
// CoordinateGetRaw queries for the coordinate of the given node. This is an
|
|
// unusual state store method because it just returns the raw coordinate or
|
|
// nil, none of the Raft or node information is returned. This hits the 90%
|
|
// internal-to-Consul use case for this data, and this isn't exposed via an
|
|
// endpoint, so it doesn't matter that the Raft info isn't available.
|
|
func (s *StateStore) CoordinateGetRaw(node string) (*coordinate.Coordinate, error) {
|
|
tx := s.db.Txn(false)
|
|
defer tx.Abort()
|
|
|
|
// Pull the full coordinate entry.
|
|
coord, err := tx.First("coordinates", "id", node)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed coordinate lookup: %s", err)
|
|
}
|
|
|
|
// Pick out just the raw coordinate.
|
|
if coord != nil {
|
|
return coord.(*structs.Coordinate).Coord, nil
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
// Coordinates queries for all nodes with coordinates.
|
|
func (s *StateStore) Coordinates() (uint64, structs.Coordinates, error) {
|
|
tx := s.db.Txn(false)
|
|
defer tx.Abort()
|
|
|
|
// Get the table index.
|
|
idx := maxIndexTxn(tx, s.getWatchTables("Coordinates")...)
|
|
|
|
// Pull all the coordinates.
|
|
coords, err := tx.Get("coordinates", "id")
|
|
if err != nil {
|
|
return 0, nil, fmt.Errorf("failed coordinate lookup: %s", err)
|
|
}
|
|
var results structs.Coordinates
|
|
for coord := coords.Next(); coord != nil; coord = coords.Next() {
|
|
results = append(results, coord.(*structs.Coordinate))
|
|
}
|
|
return idx, results, nil
|
|
}
|
|
|
|
// CoordinateBatchUpdate processes a batch of coordinate updates and applies
|
|
// them in a single transaction.
|
|
func (s *StateStore) CoordinateBatchUpdate(idx uint64, updates structs.Coordinates) error {
|
|
tx := s.db.Txn(true)
|
|
defer tx.Abort()
|
|
|
|
// Upsert the coordinates.
|
|
for _, update := range updates {
|
|
// Since the cleanup of coordinates is tied to deletion of
|
|
// nodes, we silently drop any updates for nodes that we don't
|
|
// know about. This might be possible during normal operation
|
|
// if we happen to get a coordinate update for a node that
|
|
// hasn't been able to add itself to the catalog yet. Since we
|
|
// don't carefully sequence this, and since it will fix itself
|
|
// on the next coordinate update from that node, we don't return
|
|
// an error or log anything.
|
|
node, err := tx.First("nodes", "id", update.Node)
|
|
if err != nil {
|
|
return fmt.Errorf("failed node lookup: %s", err)
|
|
}
|
|
if node == nil {
|
|
continue
|
|
}
|
|
|
|
if err := tx.Insert("coordinates", update); err != nil {
|
|
return fmt.Errorf("failed inserting coordinate: %s", err)
|
|
}
|
|
}
|
|
|
|
// Update the index.
|
|
if err := tx.Insert("index", &IndexEntry{"coordinates", idx}); err != nil {
|
|
return fmt.Errorf("failed updating index: %s", err)
|
|
}
|
|
|
|
tx.Defer(func() { s.tableWatches["coordinates"].Notify() })
|
|
tx.Commit()
|
|
return nil
|
|
}
|