英文:
Logger Writing to Multiple Files & Stderr/Stdout
问题
我的目标是创建一个日志记录器，可以同时将输出发送到标准输出（info日志）和标准错误（error日志），以及相应的文件（info.log和errors.log）。
我目前在Go中使用以下方式的日志记录器：
package main
import (
"log"
"os"
"io"
)
func main() {
// 当前的方法
infoLog := log.New("./data/info.log", "INFO\t", log.Ldate|log.Ltime)
errorLog := log.New("./data/errors.log", "ERROR\t", log.Ldate|log.Ltime|log.Lshortfile)
infoLog.Println("Hello INFO!")
errorLog.Println("Hello ERROR!")
// 我了解到可以使用io.MultiWriter来同时写入到标准输出/标准错误和一个文件中
f, err := os.OpenFile("./data/info.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatalf("error opening file: %v", err)
}
defer f.Close()
wrt := io.MultiWriter(os.Stdout, f)
log.SetOutput(wrt)
log.Println("Hello World!")
}
我想要的是将infoLog和errorLog的格式（例如log.Ldate|log.Ltime）应用到io.MultiWriter中。有办法做到这一点吗？
英文:
My goal is to create a logger that I can use to output to stdout (info logs) and stderr (error logs) as well as respective files (info.log) and (errors.log) all at the same time.
I am currently using loggers in Go like the following:
package main
import (
"log"
"os"
"io"
)
func main() {
// Current method
infoLog := log.New("./data/info.log", "INFO\t", log.Ldate|log.Ltime)
errorLog := log.New("./data/errors.log", "ERROR\t", log.Ldate|log.Ltime|log.Lshortfile)
infoLog.Println("Hello INFO!")
errorLog.Println("Hello ERROR!")
// I've read about using io.MultiWriter like the following in order to write to stdout/stderr as well as a flat file at the same time
f, err := os.OpenFile("./data/info.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatalf("error opening file: %v", err)
}
defer f.Close()
wrt := io.MultiWriter(os.Stdout, f)
log.SetOutput(wrt)
log.Println("Hello World!")
}
I'd like to basically take the formatting of infoLog and errorLog (like in my first logging solution) like log.Ldate|log.Ltime and apply it to the io.MultiWriter. Is there a way to do this?
答案1
得分: 2
为了将日志信息和错误以标准格式记录在文件中，以便其他日志服务（如filebeat、logstash等）能够理解，我建议您使用github.com/sirupsen/logrus。这个包提供了SetFormatter函数来定义输出日志的格式。例如：
logrus.SetFormatter(&logrus.JSONFormatter{
FieldMap: logrus.FieldMap{
logrus.FieldKeyTime: "@timestamp",
logrus.FieldKeyMsg: "message",
logrus.FieldKeyFunc: "func",
logrus.FieldKeyFile: "file",
},
})
您可以定义用于记录日志的文件。例如：
file, err := os.OpenFile("payment_logs.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
设置日志非常简单和标准：
logger.Info("This is an info message")
logger.Warn("This is a warning message")
logger.Error("This is an error message")
以上是要翻译的内容。
英文:
For logging info and error in file with standard format that other logging services such as filebeat, logstash and etc can understand it I suggest you to use github.com/sirupsen/logrus.
This package has SetFormater function to define format of output log. For example:
logrus.SetFormatter(&logrus.JSONFormatter{
FieldMap: logrus.FieldMap{
logrus.FieldKeyTime: "@timestamp",
logrus.FieldKeyMsg: "message",
logrus.FieldKeyFunc: "func",
logrus.FieldKeyFile: "file",
},
})
and you can define file for logging. For example:
file, err := os.OpenFile("payment_logs.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
And set log is very easy and standard:
logger.Info("This is an info message")
logger.Warn("This is a warning message")
logger.Error("This is an error message")
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