进程重启时，自动保存未保存的带宽统计数据到本地文件，以便于在重启后恢复

internal/nodes/api_node.go

@@ -35,11 +35,13 @@ import (
 	"net"
 	"os"
 	"os/exec"
+	"os/signal"
 	"runtime"
 	"sort"
 	"strconv"
 	"strings"
 	"sync"
+	"syscall"
 	"time"
 
 	// grpc decompression
@@ -92,6 +94,9 @@ func (this *APINode) Start() {
 		return
 	}
 
+	// 监听信号
+	this.listenSignals()
+
 	// 启动IP库
 	this.setProgress("IP_LIBRARY", "开始初始化IP库")
 	remotelogs.Println("API_NODE", "initializing ip library ...")
@@ -921,3 +926,16 @@ func (this *APINode) setupTimeZone() {
 		}
 	}
 }
+
+// 监听一些信号
+func (this *APINode) listenSignals() {
+	var queue = make(chan os.Signal, 8)
+	signal.Notify(queue, syscall.SIGTERM, syscall.SIGINT, syscall.SIGKILL, syscall.SIGQUIT)
+	goman.New(func() {
+		for range queue {
+			events.Notify(events.EventQuit)
+			os.Exit(0)
+			return
+		}
+	})
+}