Go实现整合Logrus实现日志打印

目录1初步使用2增加标签WithFields3配置常见参数4输出日志到文件5利用Hooks将日志输出到其他地方Github:github.com/sirupsen/lo1初步使用packa...

目录

github:github.com/sirupsen/lo…

1 初步使用

package main
import (
  "context"
  "github.com/sirupsen/logrus"
)
​
func main() {
  method0()
}
func method0() {
  logger:= logrus.New()
  logger.Warning("This is a first log.")
  ctx := context.WithValue(context.Background(),"key","value")
  logger.Warning(ctx,"This is a second log.")
}

2 增加标签WithFields

package main​
import (
  "context"
  "github.com/sirupsen/logrus"
)
func main() {
  method1()
}
func method1() {
  log.WithFields(log.Fields{
   "fieldKey": "fieldValue",
  }).Warning("This is a first field log.")
​
  log.WithFields(log.Fields{
   "fieldKey": "fieldValue",
   "fieldKey2": "fieldValue2",
  }).Warning("This is a second field log.")
}

3 配置常见参数

package main
import (
  "context"
  "github.com/sirupsen/logrus"
  log "github.com/sirupsen/logrus"
  "os"
)
​func main() {
  method2()
}
func init() {
  // 日志作为jsON而不是默认的znumcxKbhcASCII格式器.
  log.SetFormatter(&log.JSONFormatter{})
​
  // 输出到标准输出,可以是任何io.Writer
  log.SetOutput(os.Stdout)
​
  // 只记录xx级别或以上的日志
  log.SetLevel(log.TraceLevel)
}
func method2() {
  log.WithFields(log.Fields{
   "animal": "walrus",
   "size":  10,
  }).Info("A group of walrus emerges from the ocean")
​
  log.WithFields(log.Fields{
   "omg":  true,
   "number": 122,
  }).Warn("The group's number increased tremendously!")
​
  log.WithFields(log.Fields{
   "omg":  true,
   "number": 100,
  }).Fatal("The ice breaks!")
}

Formatter一般分为两种：

日志级别一共七种：

4 输出日志到文件

package main
import (
    "context"
    "github.com/sirupsen/logrus"
    "os"
)
func main() {
    method4()
}
func method4() {
  var log = logrus.New()
  file ,err := os.OpenFile("logrus.log", os.O_CREATE|os.O_WRONLY, 0666)
  if err == nil{
   log.Out = file
  }else{
   log.Info("Failed to log to file")
  }
​
  log.WithFields(logrus.Fields{
   "filename": "123.txt",
  }).Info("This is a file log")
}

logrus.log文件的内容：

time="2022-01-06T13:04:25+08:00" level=info msg="This is a file log" filename=123.txt\

5 利用http://www.cppcns.comHooks将日志输出到其他地方

import (
 log "github.com/sirupsen/logrus"
 "gopkg.in/gemnasium/logrus-airbrake-hook.v2" // the package is named "airbrake"
 logrus_syslog "github.com/sirupsen/logrus/hooks/syslog"
 "log/syslog"
)
func init() {
 // 使用气闸挂钩来报告错误严重程度或以上的错误一个异常追踪。您可以创建自定义钩子，请参见钩子部分。
 log.AddHook(airbrake.NewHook(123, "xyz", "production"))
​
 hook, err := logrus_syslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
 if err != nil {
  log.Error("Unable to connect to local syslog daemon")
  } else {
  log.AddHook(hook)
  }
}

只需要在AddHook是添加相应的Hook就可以了

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