feat(log): add function name and line number in log message

ref: longhorn/longhorn 5509

Signed-off-by: Jack Lin <[email protected]>

main.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"path"
 	"runtime"
 	"runtime/debug"
 	"runtime/pprof"
@@ -86,6 +87,16 @@ func longhornCli() {
 	meta.GitCommit = GitCommit
 	meta.BuildDate = BuildDate
 
+	logrus.SetReportCaller(true)
+	logrus.SetFormatter(&logrus.TextFormatter{
+		CallerPrettyfier: func(f *runtime.Frame) (function string, file string) {
+			fileName := fmt.Sprintf("%s:%d", path.Base(f.File), f.Line)
+			funcName := path.Base(f.Function)
+			return funcName, fileName
+		},
+		FullTimestamp: true,
+	})
+
 	a.Before = func(c *cli.Context) error {
 		if c.GlobalBool("debug") {
 			logrus.SetLevel(logrus.DebugLevel)