Golang cluster.NewService函數代碼示例

func (s *Server) appendClusterService(c cluster.Config) {
	srv := cluster.NewService(c)
	srv.TSDBStore = s.TSDBStore
	srv.MetaStore = s.MetaStore
	s.Services = append(s.Services, srv)
	s.ClusterService = srv
}

// Ensure the shard writer returns an error when the server fails to accept the write.
func TestShardWriter_WriteShard_Error(t *testing.T) {
	ts := newTestWriteService(writeShardFail)
	s := cluster.NewService(cluster.Config{})
	s.Listener = ts.muxln
	s.TSDBStore = ts
	if err := s.Open(); err != nil {
		t.Fatal(err)
	}
	defer s.Close()
	defer ts.Close()

	w := cluster.NewShardWriter(time.Minute)
	w.MetaStore = &metaStore{host: ts.ln.Addr().String()}
	now := time.Now()

	shardID := uint64(1)
	ownerID := uint64(2)
	var points []models.Point
	points = append(points, models.MustNewPoint(
		"cpu", models.Tags{"host": "server01"}, map[string]interface{}{"value": int64(100)}, now,
	))

	if err := w.WriteShard(shardID, ownerID, points); err == nil || err.Error() != "error code 1: write shard 1: failed to write" {
		t.Fatalf("unexpected error: %v", err)
	}
}

// Ensure the shard writer returns an error when dialing times out.
func TestShardWriter_Write_ErrDialTimeout(t *testing.T) {
	ts := newTestWriteService(writeShardSuccess)
	s := cluster.NewService(cluster.Config{})
	s.Listener = ts.muxln
	s.TSDBStore = ts
	if err := s.Open(); err != nil {
		t.Fatal(err)
	}
	defer s.Close()
	defer ts.Close()

	w := cluster.NewShardWriter(time.Nanosecond)
	w.MetaStore = &metaStore{host: ts.ln.Addr().String()}
	now := time.Now()

	shardID := uint64(1)
	ownerID := uint64(2)
	var points []models.Point
	points = append(points, models.MustNewPoint(
		"cpu", models.Tags{"host": "server01"}, map[string]interface{}{"value": int64(100)}, now,
	))

	if err, exp := w.WriteShard(shardID, ownerID, points), "i/o timeout"; err == nil || !strings.Contains(err.Error(), exp) {
		t.Fatalf("expected error %v, to contain %s", err, exp)
	}
}

// Ensure the shard writer returns an error when we can't get a connection.
func TestShardWriter_Write_PoolMax(t *testing.T) {
	ts := newTestWriteService(writeShardSlow)
	s := cluster.NewService(cluster.Config{
		ShardWriterTimeout: toml.Duration(100 * time.Millisecond),
	})
	s.Listener = ts.muxln
	s.TSDBStore = ts
	if err := s.Open(); err != nil {
		t.Fatal(err)
	}
	defer s.Close()
	defer ts.Close()

	w := cluster.NewShardWriter(100*time.Millisecond, 1)
	w.MetaClient = &metaClient{host: ts.ln.Addr().String()}
	now := time.Now()

	shardID := uint64(1)
	ownerID := uint64(2)
	var points []models.Point
	points = append(points, models.MustNewPoint(
		"cpu", models.Tags{"host": "server01"}, map[string]interface{}{"value": int64(100)}, now,
	))

	go w.WriteShard(shardID, ownerID, points)
	time.Sleep(time.Millisecond)
	if err := w.WriteShard(shardID, ownerID, points); err == nil || err.Error() != "timed out waiting for free connection" {
		t.Fatalf("unexpected error: %v", err)
	}
}

// Ensure the shard writer can successful write a multiple requests.
func TestShardWriter_WriteShard_Multiple(t *testing.T) {
	ts := newTestWriteService(writeShardSuccess)
	s := cluster.NewService(cluster.Config{})
	s.Listener = ts.muxln
	s.TSDBStore = ts
	if err := s.Open(); err != nil {
		t.Fatal(err)
	}
	defer s.Close()
	defer ts.Close()

	w := cluster.NewShardWriter(time.Minute)
	w.MetaStore = &metaStore{host: ts.ln.Addr().String()}

	// Build a single point.
	now := time.Now()
	var points []models.Point
	points = append(points, models.MustNewPoint("cpu", models.Tags{"host": "server01"}, map[string]interface{}{"value": int64(100)}, now))

	// Write to shard twice and close.
	if err := w.WriteShard(1, 2, points); err != nil {
		t.Fatal(err)
	} else if err := w.WriteShard(1, 2, points); err != nil {
		t.Fatal(err)
	} else if err := w.Close(); err != nil {
		t.Fatal(err)
	}

	// Validate response.
	responses, err := ts.ResponseN(1)
	if err != nil {
		t.Fatal(err)
	} else if responses[0].shardID != 1 {
		t.Fatalf("unexpected shard id: %d", responses[0].shardID)
	}

	// Validate point.
	if p := responses[0].points[0]; p.Name() != "cpu" {
		t.Fatalf("unexpected name: %s", p.Name())
	} else if p.Fields()["value"] != int64(100) {
		t.Fatalf("unexpected 'value' field: %d", p.Fields()["value"])
	} else if p.Tags()["host"] != "server01" {
		t.Fatalf("unexpected 'host' tag: %s", p.Tags()["host"])
	} else if p.Time().UnixNano() != now.UnixNano() {
		t.Fatalf("unexpected time: %s", p.Time())
	}
}