1.4.5.2

EdgeDNS/internal/nodes/upgrade_manager.go

@@ -0,0 +1,300 @@
+// Copyright 2021 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package nodes
+
+import (
+	"crypto/md5"
+	"fmt"
+	"github.com/TeaOSLab/EdgeCommon/pkg/rpc/pb"
+	teaconst "github.com/TeaOSLab/EdgeDNS/internal/const"
+	"github.com/TeaOSLab/EdgeDNS/internal/events"
+	"github.com/TeaOSLab/EdgeDNS/internal/remotelogs"
+	"github.com/TeaOSLab/EdgeDNS/internal/rpc"
+	"github.com/TeaOSLab/EdgeDNS/internal/utils"
+	"github.com/iwind/TeaGo/Tea"
+	"github.com/iwind/TeaGo/logs"
+	stringutil "github.com/iwind/TeaGo/utils/string"
+	"github.com/iwind/gosock/pkg/gosock"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"time"
+)
+
+func init() {
+	if !teaconst.IsMain {
+		return
+	}
+
+	events.On(events.EventStart, func() {
+		go func() {
+			rpcClient, err := rpc.SharedRPC()
+			if err != nil {
+				remotelogs.Error("UPGRADE_MANAGER", err.Error())
+				return
+			}
+
+			var ticker = time.NewTicker(1 * time.Minute)
+			for range ticker.C {
+				resp, err := rpcClient.NSNodeRPC.CheckNSNodeLatestVersion(rpcClient.Context(), &pb.CheckNSNodeLatestVersionRequest{
+					Os:             runtime.GOOS,
+					Arch:           runtime.GOARCH,
+					CurrentVersion: teaconst.Version,
+				})
+				if err != nil {
+					if rpc.IsConnError(err) {
+						remotelogs.Debug("UPGRADE_MANAGER", err.Error())
+					} else {
+						remotelogs.Error("UPGRADE_MANAGER", err.Error())
+					}
+					continue
+				}
+				if resp.HasNewVersion {
+					sharedUpgradeManager.Start()
+				}
+			}
+		}()
+	})
+}
+
+var sharedUpgradeManager = NewUpgradeManager()
+
+// UpgradeManager 节点升级管理器
+// TODO 需要在集群中设置是否自动更新
+type UpgradeManager struct {
+	isInstalling bool
+	lastFile     string
+	exe          string
+}
+
+// NewUpgradeManager 获取新对象
+func NewUpgradeManager() *UpgradeManager {
+	return &UpgradeManager{}
+}
+
+// Start 启动升级
+func (this *UpgradeManager) Start() {
+	// 必须放在文件解压之前读取可执行文件路径，防止解析之后，当前的可执行文件路径发生改变
+	exe, err := os.Executable()
+	if err != nil {
+		remotelogs.Error("UPGRADE_MANAGER", "can not find current executable file name")
+		return
+	}
+	this.exe = exe
+
+	// 测试环境下不更新
+	if Tea.IsTesting() {
+		return
+	}
+
+	if this.isInstalling {
+		return
+	}
+	this.isInstalling = true
+
+	// 还原安装状态
+	defer func() {
+		this.isInstalling = false
+	}()
+
+	remotelogs.Println("UPGRADE_MANAGER", "upgrading dns node ...")
+	err = this.install()
+	if err != nil {
+		remotelogs.Error("UPGRADE_MANAGER", "download failed: "+err.Error())
+		return
+	}
+
+	remotelogs.Println("UPGRADE_MANAGER", "upgrade successfully")
+
+	go func() {
+		err = this.restart()
+		if err != nil {
+			logs.Println("UPGRADE_MANAGER", err.Error())
+		}
+	}()
+}
+
+func (this *UpgradeManager) install() error {
+	// 检查是否有已下载但未安装成功的
+	if len(this.lastFile) > 0 {
+		_, err := os.Stat(this.lastFile)
+		if err == nil {
+			err = this.unzip(this.lastFile)
+			if err != nil {
+				return err
+			}
+			this.lastFile = ""
+			return nil
+		}
+	}
+
+	// 创建临时文件
+	dir := Tea.Root + "/tmp"
+	_, err := os.Stat(dir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			err = os.Mkdir(dir, 0777)
+			if err != nil {
+				return err
+			}
+		} else {
+			return err
+		}
+	}
+
+	remotelogs.Println("UPGRADE_MANAGER", "downloading new node ...")
+
+	path := dir + "/" + teaconst.ProcessName + ".tmp"
+	fp, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0777)
+	if err != nil {
+		return err
+	}
+	isClosed := false
+	defer func() {
+		if !isClosed {
+			_ = fp.Close()
+		}
+	}()
+
+	client, err := rpc.SharedRPC()
+	if err != nil {
+		return err
+	}
+
+	var offset int64
+	var h = md5.New()
+	var sum = ""
+	var filename = ""
+	for {
+		resp, err := client.NSNodeRPC.DownloadNSNodeInstallationFile(client.Context(), &pb.DownloadNSNodeInstallationFileRequest{
+			Os:          runtime.GOOS,
+			Arch:        runtime.GOARCH,
+			ChunkOffset: offset,
+		})
+		if err != nil {
+			return err
+		}
+		if len(resp.Sum) == 0 {
+			return nil
+		}
+		sum = resp.Sum
+		filename = resp.Filename
+		if stringutil.VersionCompare(resp.Version, teaconst.Version) <= 0 {
+			return nil
+		}
+		if len(resp.ChunkData) == 0 {
+			break
+		}
+
+		// 写入文件
+		_, err = fp.Write(resp.ChunkData)
+		if err != nil {
+			return err
+		}
+		_, err = h.Write(resp.ChunkData)
+		if err != nil {
+			return err
+		}
+
+		offset = resp.Offset
+	}
+
+	if len(filename) == 0 {
+		return nil
+	}
+
+	isClosed = true
+	err = fp.Close()
+	if err != nil {
+		return err
+	}
+
+	if fmt.Sprintf("%x", h.Sum(nil)) != sum {
+		_ = os.Remove(path)
+		return nil
+	}
+
+	// 改成zip
+	zipPath := dir + "/" + filename
+	err = os.Rename(path, zipPath)
+	if err != nil {
+		return err
+	}
+	this.lastFile = zipPath
+
+	// 解压
+	err = this.unzip(zipPath)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// 解压
+func (this *UpgradeManager) unzip(zipPath string) error {
+	var isOk = false
+	defer func() {
+		if isOk {
+			// 只有解压并覆盖成功后才会删除
+			_ = os.Remove(zipPath)
+		}
+	}()
+
+	// 解压
+	var target = Tea.Root
+	if Tea.IsTesting() {
+		// 测试环境下只解压在tmp目录
+		target = Tea.Root + "/tmp"
+	}
+
+	// 先改先前的可执行文件
+	err := os.Rename(target+"/bin/"+teaconst.ProcessName, target+"/bin/."+teaconst.ProcessName+".dist")
+	hasBackup := err == nil
+	defer func() {
+		if !isOk && hasBackup {
+			// 失败时还原
+			_ = os.Rename(target+"/bin/."+teaconst.ProcessName+".dist", target+"/bin/"+teaconst.ProcessName)
+		}
+	}()
+
+	unzip := utils.NewUnzip(zipPath, target, teaconst.ProcessName+"/")
+	err = unzip.Run()
+	if err != nil {
+		return err
+	}
+
+	isOk = true
+
+	return nil
+}
+
+// 重启
+func (this *UpgradeManager) restart() error {
+	// 关闭当前sock，防止无法重启
+	_ = gosock.NewTmpSock(teaconst.ProcessName).Close()
+
+	// 重新启动
+	if DaemonIsOn && DaemonPid == os.Getppid() {
+		os.Exit(0) // TODO 试着更优雅重启
+	} else {
+		// quit
+		events.Notify(events.EventQuit)
+
+		// 启动
+		var exe = filepath.Dir(this.exe) + "/" + teaconst.ProcessName
+
+		logs.Println("restarting ...", exe)
+		cmd := exec.Command(exe, "start")
+		err := cmd.Start()
+		if err != nil {
+			return err
+		}
+
+		// 退出当前进程
+		time.Sleep(1 * time.Second)
+		os.Exit(0)
+	}
+	return nil
+}