优化本地mysql服务自动启动逻辑

internal/db/utils/utils.go

@@ -1,10 +1,18 @@
 package dbutils
 
 import (
+	executils "github.com/TeaOSLab/EdgeAPI/internal/utils/exec"
+	"github.com/iwind/TeaGo/Tea"
 	"github.com/iwind/TeaGo/dbs"
+	"github.com/iwind/TeaGo/lists"
+	"github.com/iwind/TeaGo/logs"
 	"github.com/iwind/TeaGo/types"
 	"net"
+	"os"
+	"os/exec"
+	"regexp"
 	"strings"
+	"time"
 )
 
 // NewQuery 构造Query
@@ -127,3 +135,79 @@ func MySQLVersionFrom8() (bool, error) {
 	}
 	return false, nil
 }
+
+// FindMySQLPath find out mysqld_safe path from system processes
+func FindMySQLPath() string {
+	psExe, err := executils.LookPath("ps")
+	if err != nil {
+		return ""
+	}
+	var cmd = executils.NewTimeoutCmd(3*time.Second, psExe, "-ef").
+		WithStdout().
+		WithStderr()
+	err = cmd.Run()
+	if err != nil {
+		return ""
+	}
+	var reg = regexp.MustCompile(`\s(/\S+/mysqld_safe)\s`)
+	var matches = reg.FindStringSubmatch(cmd.Stdout())
+	if len(matches) > 1 {
+		var path = matches[1]
+		_, err = os.Stat(path)
+		if err != nil {
+			return ""
+		}
+		return path
+	}
+	return ""
+}
+
+// FindMySQLPathAndRemember find out mysqld_safe path then remember it for future usage
+func FindMySQLPathAndRemember() {
+	var path = FindMySQLPath()
+	if len(path) == 0 {
+		return
+	}
+
+	var cacheFile = Tea.Root + "/data/mysql-path.cache"
+	_ = os.WriteFile(cacheFile, []byte(path), 0666) // ignore error
+}
+
+// StartLocalMySQL try to start local mysql server
+func StartLocalMySQL() {
+	// possible installed paths
+	var mysqldSafeFiles = []string{}
+
+	// read last path from cache file
+	var cacheFile = Tea.Root + "/data/mysql-path.cache"
+	cacheData, err := os.ReadFile(cacheFile)
+	if err == nil && len(cacheData) > 0 {
+		mysqldSafeFiles = append(mysqldSafeFiles, string(cacheData))
+	}
+
+	// from $PATH variable
+	exePath, lookErr := executils.LookPath("mysqld_safe")
+	if lookErr == nil && len(exePath) > 0 && !lists.ContainsString(mysqldSafeFiles, exePath) {
+		mysqldSafeFiles = append(mysqldSafeFiles, exePath)
+	}
+
+	// these installed by edge-boot or foolish-mysql
+	for _, path := range []string{
+		"/usr/local/mysql/bin/mysqld_safe",
+		"/usr/local/mysql8/bin/mysqld_safe",
+	} {
+		if !lists.ContainsString(mysqldSafeFiles, path) {
+			mysqldSafeFiles = append(mysqldSafeFiles, path)
+		}
+	}
+	
+	for _, mysqldSafeFile := range mysqldSafeFiles {
+		_, err := os.Stat(mysqldSafeFile)
+		if err == nil {
+			logs.Println("[API_NODE]try to start local mysql server from '" + mysqldSafeFile + "' ...")
+			var mysqlCmd = exec.Command(mysqldSafeFile)
+			_ = mysqlCmd.Start()
+			break
+		}
+	}
+}

internal/db/utils/utils_test.go

@@ -35,3 +35,11 @@ func TestMySQLVersion(t *testing.T) {
 func TestMySQLVersionFrom8(t *testing.T) {
 	t.Log(dbutils.MySQLVersionFrom8())
 }
+
+func TestFindMySQLPath(t *testing.T) {
+	t.Log(dbutils.FindMySQLPath())
+}
+
+func TestStartLocalMySQL(t *testing.T) {
+	dbutils.StartLocalMySQL()
+}

internal/nodes/api_node.go

@@ -295,6 +295,9 @@ func (this *APINode) listenRPC(listener net.Listener, tlsConfig *tls.Config) err
 func (this *APINode) checkDB() error {
 	logs.Println("[API_NODE]checking database connection ...")
 
+	// lookup mysqld_safe process
+	go dbutils.FindMySQLPathAndRemember()
+
 	db, err := dbs.Default()
 	if err != nil {
 		return err
@@ -311,13 +314,7 @@ func (this *APINode) checkDB() error {
 		if strings.Contains(err.Error(), "connection refused") {
 			config, _ := db.Config()
 			if config != nil && (strings.Contains(config.Dsn, "tcp(127.0.0.1:") || strings.Contains(config.Dsn, "tcp(localhost:")) && os.Getgid() == 0 /** ROOT 用户 **/ {
-				var mysqldSafeFile = "/usr/local/mysql/bin/mysqld_safe"
-				_, err = os.Stat(mysqldSafeFile)
-				if err == nil {
-					logs.Println("[API_NODE]try to start local mysql server from '" + mysqldSafeFile + "' ...")
-					var mysqlCmd = exec.Command(mysqldSafeFile)
-					_ = mysqlCmd.Start()
-				}
+				dbutils.StartLocalMySQL()
 			}
 		}
 

internal/utils/exec/look_linux.go

@@ -0,0 +1,59 @@
+// Copyright 2023 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+//go:build linux
+
+package executils
+
+import (
+	"golang.org/x/sys/unix"
+	"io/fs"
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+// LookPath customize our LookPath() function, to work in broken $PATH environment variable
+func LookPath(file string) (string, error) {
+	result, err := exec.LookPath(file)
+	if err == nil && len(result) > 0 {
+		return result, nil
+	}
+
+	// add common dirs contains executable files these may be excluded in $PATH environment variable
+	var binPaths = []string{
+		"/usr/sbin",
+		"/usr/bin",
+		"/usr/local/sbin",
+		"/usr/local/bin",
+	}
+
+	for _, binPath := range binPaths {
+		var fullPath = binPath + string(os.PathSeparator) + file
+
+		stat, err := os.Stat(fullPath)
+		if err != nil {
+			continue
+		}
+		if stat.IsDir() {
+			return "", syscall.EISDIR
+		}
+
+		var mode = stat.Mode()
+		if mode.IsDir() {
+			return "", syscall.EISDIR
+		}
+		err = syscall.Faccessat(unix.AT_FDCWD, fullPath, unix.X_OK, unix.AT_EACCESS)
+		if err == nil || (err != syscall.ENOSYS && err != syscall.EPERM) {
+			return fullPath, err
+		}
+		if mode&0111 != 0 {
+			return fullPath, nil
+		}
+		return "", fs.ErrPermission
+	}
+
+	return "", &exec.Error{
+		Name: file,
+		Err:  exec.ErrNotFound,
+	}
+}
+

internal/utils/exec/look_others.go

@@ -0,0 +1,10 @@
+// Copyright 2023 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+//go:build !linux
+
+package executils
+
+import "os/exec"
+
+func LookPath(file string) (string, error) {
+	return exec.LookPath(file)
+}