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utils.go
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utils.go
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package log
import (
"fmt"
"os"
"path"
"github.com/sirupsen/logrus"
)
// Reopen log fd handlers when receiving signal syscall.SIGUSR1
func ReopenLogs(logDir string, accessLogger, errorLogger *logrus.Logger) error {
if logDir == "" {
return nil
}
accessLog, err := os.OpenFile(path.Join(logDir, "access.log"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
errorLog, err := os.OpenFile(path.Join(logDir, "error.log"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
oldFd := accessLogger.Out.(*os.File)
accessLogger.Out = accessLog
oldFd.Close()
oldFd = errorLogger.Out.(*os.File)
errorLogger.Out = errorLog
oldFd.Close()
return nil
}
// @backtrackLevel: log the backtrack info when logging level is >= backtrackLevel
func SetupLogger(logFormat, logDir, logLevel, backtrackLevel string) (accessLogger *logrus.Logger, errorLogger *logrus.Logger, err error) {
level, err := logrus.ParseLevel(logLevel)
if err != nil {
return nil, nil, fmt.Errorf("failed to parse log level: %s", err)
}
btLevel, err := logrus.ParseLevel(backtrackLevel)
if err != nil {
return nil, nil, fmt.Errorf("failed to parse backtrack level: %s", err)
}
accessLogger = logrus.New()
errorLogger = logrus.New()
if logFormat == "json" {
accessLogger.SetFormatter(&logrus.JSONFormatter{})
errorLogger.SetFormatter(&logrus.JSONFormatter{})
}
errorLogger.Level = level
errorLogger.Hooks.Add(NewBackTrackHook(btLevel))
if logDir == "" {
accessLogger.Out = os.Stdout
errorLogger.Out = os.Stderr
return
}
accessLog, err := os.OpenFile(path.Join(logDir, "access.log"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return nil, nil, fmt.Errorf("failed to create access.log: %s", err)
}
errorLog, err := os.OpenFile(path.Join(logDir, "error.log"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return nil, nil, fmt.Errorf("failed to create error.log: %s", err)
}
accessLogger.Out = accessLog
errorLogger.Out = errorLog
return
}