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.") } 复制代码
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.") } 复制代码
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!") } 复制代码
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") } 复制代码
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\ 复制代码
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) } } 复制代码
只需要在AddHook是添加相应的Hook就可以了