open-consul/consul/state/coordinate_test.go

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package state
import (
"math/rand"
"reflect"
"testing"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/go-memdb"
"github.com/hashicorp/serf/coordinate"
)
// generateRandomCoordinate creates a random coordinate. This mucks with the
// underlying structure directly, so it's not really useful for any particular
// position in the network, but it's a good payload to send through to make
// sure things come out the other side or get stored correctly.
func generateRandomCoordinate() *coordinate.Coordinate {
config := coordinate.DefaultConfig()
coord := coordinate.NewCoordinate(config)
for i := range coord.Vec {
coord.Vec[i] = rand.NormFloat64()
}
coord.Error = rand.NormFloat64()
coord.Adjustment = rand.NormFloat64()
return coord
}
func TestStateStore_Coordinate_Updates(t *testing.T) {
s := testStateStore(t)
// Make sure the coordinates list starts out empty, and that a query for
// a raw coordinate for a nonexistent node doesn't do anything bad.
ws := memdb.NewWatchSet()
idx, coords, err := s.Coordinates(ws)
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 0 {
t.Fatalf("bad index: %d", idx)
}
if coords != nil {
t.Fatalf("bad: %#v", coords)
}
coord, err := s.CoordinateGetRaw("nope")
if err != nil {
t.Fatalf("err: %s", err)
}
if coord != nil {
t.Fatalf("bad: %#v", coord)
}
// Make an update for nodes that don't exist and make sure they get
// ignored.
updates := structs.Coordinates{
&structs.Coordinate{
Node: "node1",
Coord: generateRandomCoordinate(),
},
&structs.Coordinate{
Node: "node2",
Coord: generateRandomCoordinate(),
},
}
if err := s.CoordinateBatchUpdate(1, updates); err != nil {
t.Fatalf("err: %s", err)
}
if watchFired(ws) {
t.Fatalf("bad")
}
// Should still be empty, though applying an empty batch does bump
// the table index.
ws = memdb.NewWatchSet()
idx, coords, err = s.Coordinates(ws)
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 1 {
t.Fatalf("bad index: %d", idx)
}
if coords != nil {
t.Fatalf("bad: %#v", coords)
}
// Register the nodes then do the update again.
testRegisterNode(t, s, 1, "node1")
testRegisterNode(t, s, 2, "node2")
if err := s.CoordinateBatchUpdate(3, updates); err != nil {
t.Fatalf("err: %s", err)
}
if !watchFired(ws) {
t.Fatalf("bad")
}
// Should go through now.
ws = memdb.NewWatchSet()
idx, coords, err = s.Coordinates(ws)
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 3 {
t.Fatalf("bad index: %d", idx)
}
if !reflect.DeepEqual(coords, updates) {
t.Fatalf("bad: %#v", coords)
}
// Also verify the raw coordinate interface.
for _, update := range updates {
coord, err := s.CoordinateGetRaw(update.Node)
if err != nil {
t.Fatalf("err: %s", err)
}
if !reflect.DeepEqual(coord, update.Coord) {
t.Fatalf("bad: %#v", coord)
}
}
// Update the coordinate for one of the nodes.
updates[1].Coord = generateRandomCoordinate()
if err := s.CoordinateBatchUpdate(4, updates); err != nil {
t.Fatalf("err: %s", err)
}
if !watchFired(ws) {
t.Fatalf("bad")
}
// Verify it got applied.
idx, coords, err = s.Coordinates(nil)
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 4 {
t.Fatalf("bad index: %d", idx)
}
if !reflect.DeepEqual(coords, updates) {
t.Fatalf("bad: %#v", coords)
}
// And check the raw coordinate version of the same thing.
for _, update := range updates {
coord, err := s.CoordinateGetRaw(update.Node)
if err != nil {
t.Fatalf("err: %s", err)
}
if !reflect.DeepEqual(coord, update.Coord) {
t.Fatalf("bad: %#v", coord)
}
}
}
func TestStateStore_Coordinate_Cleanup(t *testing.T) {
s := testStateStore(t)
// Register a node and update its coordinate.
testRegisterNode(t, s, 1, "node1")
updates := structs.Coordinates{
&structs.Coordinate{
Node: "node1",
Coord: generateRandomCoordinate(),
},
}
if err := s.CoordinateBatchUpdate(2, updates); err != nil {
t.Fatalf("err: %s", err)
}
// Make sure it's in there.
coord, err := s.CoordinateGetRaw("node1")
if err != nil {
t.Fatalf("err: %s", err)
}
if !reflect.DeepEqual(coord, updates[0].Coord) {
t.Fatalf("bad: %#v", coord)
}
// Now delete the node.
if err := s.DeleteNode(3, "node1"); err != nil {
t.Fatalf("err: %s", err)
}
// Make sure the coordinate is gone.
coord, err = s.CoordinateGetRaw("node1")
if err != nil {
t.Fatalf("err: %s", err)
}
if coord != nil {
t.Fatalf("bad: %#v", coord)
}
// Make sure the index got updated.
idx, coords, err := s.Coordinates(nil)
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 3 {
t.Fatalf("bad index: %d", idx)
}
if coords != nil {
t.Fatalf("bad: %#v", coords)
}
}
func TestStateStore_Coordinate_Snapshot_Restore(t *testing.T) {
s := testStateStore(t)
// Register two nodes and update their coordinates.
testRegisterNode(t, s, 1, "node1")
testRegisterNode(t, s, 2, "node2")
updates := structs.Coordinates{
&structs.Coordinate{
Node: "node1",
Coord: generateRandomCoordinate(),
},
&structs.Coordinate{
Node: "node2",
Coord: generateRandomCoordinate(),
},
}
if err := s.CoordinateBatchUpdate(3, updates); err != nil {
t.Fatalf("err: %s", err)
}
// Snapshot the coordinates.
snap := s.Snapshot()
defer snap.Close()
// Alter the real state store.
trash := structs.Coordinates{
&structs.Coordinate{
Node: "node1",
Coord: generateRandomCoordinate(),
},
&structs.Coordinate{
Node: "node2",
Coord: generateRandomCoordinate(),
},
}
if err := s.CoordinateBatchUpdate(4, trash); err != nil {
t.Fatalf("err: %s", err)
}
// Verify the snapshot.
if idx := snap.LastIndex(); idx != 3 {
t.Fatalf("bad index: %d", idx)
}
iter, err := snap.Coordinates()
if err != nil {
t.Fatalf("err: %s", err)
}
var dump structs.Coordinates
for coord := iter.Next(); coord != nil; coord = iter.Next() {
dump = append(dump, coord.(*structs.Coordinate))
}
if !reflect.DeepEqual(dump, updates) {
t.Fatalf("bad: %#v", dump)
}
// Restore the values into a new state store.
func() {
s := testStateStore(t)
restore := s.Restore()
if err := restore.Coordinates(5, dump); err != nil {
t.Fatalf("err: %s", err)
}
restore.Commit()
// Read the restored coordinates back out and verify that they match.
idx, res, err := s.Coordinates(nil)
if err != nil {
t.Fatalf("err: %s", err)
}
if idx != 5 {
t.Fatalf("bad index: %d", idx)
}
if !reflect.DeepEqual(res, updates) {
t.Fatalf("bad: %#v", res)
}
// Check that the index was updated (note that it got passed
// in during the restore).
if idx := s.maxIndex("coordinates"); idx != 5 {
t.Fatalf("bad index: %d", idx)
}
}()
}