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ASCII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：
- &log.JSONFormatter{}
- &log.TextFormatter{}
日志级别一共七种：
- log.Trace()
- log.Debug()
- log.Info()
- log.Warn()
- log.Error()
- log.Fatal()
- log.Panic()
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Hooks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
