split cluster Server into Machine and Server

internal/machine/machine.go

@@ -0,0 +1,54 @@
+package machine
+
+import (
+	"fmt"
+	"google.golang.org/grpc"
+	"log/slog"
+	"net"
+	"uncloud/internal/machine/api/pb"
+	"uncloud/internal/machine/cluster"
+)
+
+type Config struct {
+	// DataDir is the directory where the machine stores its persistent state.
+	DataDir     string
+	APIAddr     string
+	APISockPath string
+}
+
+type Machine struct {
+	config Config
+	server *grpc.Server
+}
+
+func NewMachine(config *Config) (*Machine, error) {
+	m := &Machine{
+		config: *config,
+		server: grpc.NewServer(),
+	}
+
+	clusterState := cluster.NewState(cluster.StatePath(config.DataDir))
+	clusterServer := cluster.NewServer(clusterState)
+	pb.RegisterClusterServer(m.server, clusterServer)
+
+	return m, nil
+}
+
+func (m *Machine) Run() error {
+	listener, err := net.Listen("tcp", m.config.APIAddr)
+	if err != nil {
+		return fmt.Errorf("listen API port: %w", err)
+	}
+	slog.Info("Starting API server.", "addr", m.config.APIAddr)
+	if err = m.server.Serve(listener); err != nil {
+		return fmt.Errorf("API server failed: %w", err)
+	}
+	return nil
+}
+
+func (m *Machine) Stop() {
+	slog.Info("Stopping API server.")
+	// TODO: implement timeout for graceful shutdown.
+	m.server.GracefulStop()
+	slog.Info("API server stopped.")
+}