292 lines
8.8 KiB
Go
292 lines
8.8 KiB
Go
package consul
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import (
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"fmt"
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"math/rand"
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"os"
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"reflect"
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"strings"
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"testing"
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"time"
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"github.com/hashicorp/consul/consul/structs"
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"github.com/hashicorp/consul/testutil"
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"github.com/hashicorp/net-rpc-msgpackrpc"
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"github.com/hashicorp/serf/coordinate"
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)
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// generateRandomCoordinate creates a random coordinate. This mucks with the
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// underlying structure directly, so it's not really useful for any particular
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// position in the network, but it's a good payload to send through to make
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// sure things come out the other side or get stored correctly.
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func generateRandomCoordinate() *coordinate.Coordinate {
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config := coordinate.DefaultConfig()
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coord := coordinate.NewCoordinate(config)
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for i := range coord.Vec {
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coord.Vec[i] = rand.NormFloat64()
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}
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coord.Error = rand.NormFloat64()
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coord.Adjustment = rand.NormFloat64()
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return coord
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}
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// verifyCoordinatesEqual will compare a and b and fail if they are not exactly
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// equal (no floating point fuzz is considered since we are trying to make sure
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// we are getting exactly the coordinates we expect, without math on them).
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func verifyCoordinatesEqual(t *testing.T, a, b *coordinate.Coordinate) {
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if !reflect.DeepEqual(a, b) {
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t.Fatalf("coordinates are not equal: %v != %v", a, b)
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}
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}
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func TestCoordinate_Update(t *testing.T) {
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name := fmt.Sprintf("Node %d", getPort())
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dir1, config1 := testServerConfig(t, name)
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defer os.RemoveAll(dir1)
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config1.CoordinateUpdatePeriod = 500 * time.Millisecond
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config1.CoordinateUpdateBatchSize = 5
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config1.CoordinateUpdateMaxBatches = 2
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s1, err := NewServer(config1)
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if err != nil {
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t.Fatal(err)
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}
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testutil.WaitForLeader(t, s1.RPC, "dc1")
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// Send an update for the first node.
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arg1 := structs.CoordinateUpdateRequest{
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Datacenter: "dc1",
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Node: "node1",
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Coord: generateRandomCoordinate(),
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}
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var out struct{}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg1, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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// Send an update for the second node.
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arg2 := structs.CoordinateUpdateRequest{
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Datacenter: "dc1",
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Node: "node2",
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Coord: generateRandomCoordinate(),
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}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg2, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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// Make sure the updates did not yet apply because the update period
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// hasn't expired.
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state := s1.fsm.State()
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_, c, err := state.CoordinateGet("node1")
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if c != nil {
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t.Fatalf("should be nil because the update should be batched")
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}
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_, c, err = state.CoordinateGet("node2")
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if c != nil {
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t.Fatalf("should be nil because the update should be batched")
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}
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// Wait a while and the updates should get picked up.
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time.Sleep(2 * s1.config.CoordinateUpdatePeriod)
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_, c, err = state.CoordinateGet("node1")
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if c == nil {
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t.Fatalf("should return a coordinate but it's nil")
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}
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verifyCoordinatesEqual(t, c, arg1.Coord)
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_, c, err = state.CoordinateGet("node2")
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if c == nil {
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t.Fatalf("should return a coordinate but it's nil")
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}
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verifyCoordinatesEqual(t, c, arg2.Coord)
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// Now spam some coordinate updates and make sure it starts throwing
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// them away if they exceed the batch allowance. Note we have to make
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// unique names since these are held in map by node name.
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spamLen := s1.config.CoordinateUpdateBatchSize*s1.config.CoordinateUpdateMaxBatches + 1
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for i := 0; i < spamLen; i++ {
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arg1.Node = fmt.Sprintf("bogusnode%d", i)
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arg1.Coord = generateRandomCoordinate()
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg1, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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}
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// Wait a little while for the batch routine to run, then make sure
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// exactly one of the updates got dropped (we won't know which one).
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time.Sleep(2 * s1.config.CoordinateUpdatePeriod)
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numDropped := 0
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for i := 0; i < spamLen; i++ {
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_, c, err = state.CoordinateGet(fmt.Sprintf("bogusnode%d", i))
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if c == nil {
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numDropped++
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}
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}
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if numDropped != 1 {
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t.Fatalf("wrong number of coordinates dropped, %d != 1", numDropped)
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}
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// Finally, send a coordinate with the wrong dimensionality to make sure
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// there are no panics, and that it gets rejected.
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arg2.Coord.Vec = make([]float64, 2*len(arg2.Coord.Vec))
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err = msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg2, &out)
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if err == nil || !strings.Contains(err.Error(), "rejected bad coordinate") {
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t.Fatalf("should have failed with an error, got %v", err)
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}
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}
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func TestCoordinate_Get(t *testing.T) {
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testutil.WaitForLeader(t, s1.RPC, "dc1")
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arg := structs.CoordinateUpdateRequest{
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Datacenter: "dc1",
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Node: "node1",
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Coord: generateRandomCoordinate(),
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}
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// Send an initial update, waiting a little while for the batch update
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// to run.
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var out struct{}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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time.Sleep(2 * s1.config.CoordinateUpdatePeriod)
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// Query the coordinate via RPC.
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arg2 := structs.NodeSpecificRequest{
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Datacenter: "dc1",
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Node: "node1",
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}
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coord := structs.IndexedCoordinate{}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Get", &arg2, &coord); err != nil {
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t.Fatalf("err: %v", err)
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}
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verifyCoordinatesEqual(t, coord.Coord, arg.Coord)
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// Send another coordinate update, waiting after for the flush.
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arg.Coord = generateRandomCoordinate()
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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time.Sleep(2 * s1.config.CoordinateUpdatePeriod)
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// Now re-query and make sure the results are fresh.
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Get", &arg2, &coord); err != nil {
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t.Fatalf("err: %v", err)
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}
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verifyCoordinatesEqual(t, coord.Coord, arg.Coord)
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}
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func TestCoordinate_ListDatacenters(t *testing.T) {
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testutil.WaitForLeader(t, s1.RPC, "dc1")
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// It's super hard to force the Serfs into a known configuration of
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// coordinates, so the best we can do is make sure our own DC shows
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// up in the list with the proper coordinates. The guts of the algorithm
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// are extensively tested in rtt_test.go using a mock database.
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var out []structs.DatacenterMap
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.ListDatacenters", struct{}{}, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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if len(out) != 1 ||
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out[0].Datacenter != "dc1" ||
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len(out[0].Coordinates) != 1 ||
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out[0].Coordinates[0].Node != s1.config.NodeName {
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t.Fatalf("bad: %v", out)
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}
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c, err := s1.serfWAN.GetCoordinate()
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if err != nil {
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t.Fatalf("bad: %v", err)
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}
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verifyCoordinatesEqual(t, c, out[0].Coordinates[0].Coord)
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}
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func TestCoordinate_ListNodes(t *testing.T) {
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testutil.WaitForLeader(t, s1.RPC, "dc1")
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// Send coordinate updates for a few nodes, waiting a little while for
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// the batch update to run.
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arg1 := structs.CoordinateUpdateRequest{
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Datacenter: "dc1",
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Node: "foo",
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Coord: generateRandomCoordinate(),
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}
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var out struct{}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg1, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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arg2 := structs.CoordinateUpdateRequest{
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Datacenter: "dc1",
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Node: "bar",
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Coord: generateRandomCoordinate(),
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}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg2, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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arg3 := structs.CoordinateUpdateRequest{
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Datacenter: "dc1",
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Node: "baz",
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Coord: generateRandomCoordinate(),
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}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.Update", &arg3, &out); err != nil {
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t.Fatalf("err: %v", err)
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}
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time.Sleep(2 * s1.config.CoordinateUpdatePeriod)
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// Now query back for all the nodes.
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arg := structs.DCSpecificRequest{
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Datacenter: "dc1",
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}
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resp := structs.IndexedCoordinates{}
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if err := msgpackrpc.CallWithCodec(codec, "Coordinate.ListNodes", &arg, &resp); err != nil {
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t.Fatalf("err: %v", err)
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}
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if len(resp.Coordinates) != 3 ||
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resp.Coordinates[0].Node != "bar" ||
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resp.Coordinates[1].Node != "baz" ||
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resp.Coordinates[2].Node != "foo" {
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t.Fatalf("bad: %v", resp.Coordinates)
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}
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verifyCoordinatesEqual(t, resp.Coordinates[0].Coord, arg2.Coord) // bar
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verifyCoordinatesEqual(t, resp.Coordinates[1].Coord, arg3.Coord) // baz
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verifyCoordinatesEqual(t, resp.Coordinates[2].Coord, arg1.Coord) // foo
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}
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