go:用zap和go-file-rotatelogs实现日志的记录和日志按时间分割

一，安装zap和go-file-rotatelogs两个库:

   1,安装zap:

liuhongdi@ku:/data/liuhongdi/zaplog$ go get -u go.uber.org/zap

  2,安装go-file-rotatelogs

liuhongdi@ku:/data/liuhongdi/zaplog2$ go get -u github.com/lestrrat/go-file-rotatelogs

  3,  go-file-rotatelogs的源码地址:

https://github.com/lestrrat/go-file-rotatelogs 

说明：刘宏缔的go森林是一个专注golang的博客，
          地址：https://blog.csdn.net/weixin_43881017

说明：作者:刘宏缔 邮箱: 371125307@qq.com

二，演示项目的相关信息

1,项目地址:

   https://github.com/liuhongdi/zaplog2

三，代码说明

main.go

1.  
   package main
2.  
    
3.  
   import (
4.  
   "fmt"
5.  
   rotatelogs "github.com/lestrrat/go-file-rotatelogs"
6.  
   "go.uber.org/zap"
7.  
   "go.uber.org/zap/zapcore"
8.  
   "io"
9.  
   "net/http"
10.  
    "time"
11.  
    )
12.  
     
13.  
    var sugarLogger *zap.SugaredLogger
14.  
     
15.  
    func main() {
16.  
    fmt.Println("begin main")
17.  
    InitLogger()
18.  
    defer sugarLogger.Sync()
19.  
    simpleHttpGet("www.cnblogs.com")
20.  
    simpleHttpGet("https://www.baidu.com")
21.  
    }
22.  
     
23.  
    //例子，http访问url,返回状态
24.  
    func simpleHttpGet(url string) {
25.  
    fmt.Println("begin simpleHttpGet:"+url)
26.  
    sugarLogger.Debugf("Trying to hit GET request for %s", url)
27.  
    resp, err := http.Get(url)
28.  
    if err != nil {
29.  
    sugarLogger.Errorf("Error fetching URL %s : Error = %s", url, err)
30.  
    } else {
31.  
    sugarLogger.Infof("Success! statusCode = %s for URL %s", resp.Status, url)
32.  
    resp.Body.Close()
33.  
    }
34.  
    }
35.  
     
36.  
    func InitLogger() {
37.  
    encoder := getEncoder()
38.  
     
39.  
    //两个interface,判断日志等级
40.  
    //warnlevel以下归到info日志
41.  
    infoLevel := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
42.  
    return lvl < zapcore.WarnLevel
43.  
    })
44.  
    //warnlevel及以上归到warn日志
45.  
    warnLevel := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
46.  
    return lvl >= zapcore.WarnLevel
47.  
    })
48.  
     
49.  
    infoWriter := getLogWriter("/data/liuhongdi/logs/zaplog2info")
50.  
    warnWriter := getLogWriter("/data/liuhongdi/logs/zaplog2warn")
51.  
     
52.  
    //创建zap.Core,for logger
53.  
    core := zapcore.NewTee(
54.  
    zapcore.NewCore(encoder, infoWriter, infoLevel),
55.  
    zapcore.NewCore(encoder, warnWriter, warnLevel),
56.  
    )
57.  
    //生成Logger
58.  
    logger := zap.New(core, zap.AddCaller())
59.  
    sugarLogger = logger.Sugar()
60.  
    }
61.  
     
62.  
    //getEncoder
63.  
    func getEncoder() zapcore.Encoder {
64.  
    encoderConfig := zap.NewProductionEncoderConfig()
65.  
    encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
66.  
    encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
67.  
    return zapcore.NewConsoleEncoder(encoderConfig)
68.  
    }
69.  
     
70.  
    //得到LogWriter
71.  
    func getLogWriter(filePath string) zapcore.WriteSyncer {
72.  
    warnIoWriter := getWriter(filePath)
73.  
    return zapcore.AddSync(warnIoWriter)
74.  
    }
75.  
     
76.  
     
77.  
    //日志文件切割
78.  
    func getWriter(filename string) io.Writer {
79.  
    // 保存日志30天，每24小时分割一次日志
80.  
    /*
81.  
    hook, err := rotatelogs.New(
82.  
    filename+"_%Y%m%d.log",
83.  
    rotatelogs.WithLinkName(filename),
84.  
    rotatelogs.WithMaxAge(time.Hour*24*30),
85.  
    rotatelogs.WithRotationTime(time.Hour*24),
86.  
    )
87.  
    */
88.  
    //保存日志30天，每1分钟分割一次日志
89.  
    hook, err := rotatelogs.New(
90.  
    filename+"_%Y%m%d%H%M.log",
91.  
    rotatelogs.WithLinkName(filename),
92.  
    rotatelogs.WithMaxAge(time.Hour*24*30),
93.  
    rotatelogs.WithRotationTime(time.Minute*1),
94.  
    )
95.  
    if err != nil {
96.  
    panic(err)
97.  
    }
98.  
    return hook
99.  
    }

四，测试效果

1,运行代码，控制台输出:

1.  
   begin main
2.  
   begin simpleHttpGet:www.cnblogs.com
3.  
   begin simpleHttpGet:https://www.baidu.com

两个url地址中,第一个缺少协议，所以会生成错误日志,写到warn日志中，
另一个地址正确，会写到info日志中

2,查看日志文件内容：

1.  
   root@ku:/data/liuhongdi/logs# more zaplog2warn_202011261853.log
2.  
   2020-11-26T18:53:18.846+0800 ERROR zaplog2/main.go:29 Error fetching URL www.cnblogs.com : Error = Get "www.cnblogs.com": unsupported protocol schem
3.  
   e ""
4.  
    
5.  
   root@ku:/data/liuhongdi/logs# more zaplog2info_202011261853.log
6.  
   2020-11-26T18:53:18.845+0800 DEBUG zaplog2/main.go:26 Trying to hit GET request for www.cnblogs.com
7.  
   2020-11-26T18:53:18.846+0800 DEBUG zaplog2/main.go:26 Trying to hit GET request for https://www.baidu.com
8.  
   2020-11-26T18:53:24.011+0800 INFO zaplog2/main.go:31 Success! statusCode = 200 OK for URL https://www.baidu.com

3,查看目录下的日志文件:  

1.  
   root@ku:/data/liuhongdi/logs# ls -l
2.  
   总用量 8
3.  
   lrwxrwxrwx 1 liuhongdi liuhongdi 49 11月 26 18:53 zaplog2info -> /data/liuhongdi/logs/zaplog2info_202011261853.log
4.  
   -rw-r--r-- 1 liuhongdi liuhongdi 636 11月 26 18:53 zaplog2info_202011261853.log
5.  
   lrwxrwxrwx 1 liuhongdi liuhongdi 49 11月 26 18:53 zaplog2warn -> /data/liuhongdi/logs/zaplog2warn_202011261853.log
6.  
   -rw-r--r-- 1 liuhongdi liuhongdi 306 11月 26 18:53 zaplog2warn_202011261853.log

可以看到go-file-rotatelogs实现日志切分时是使用了linux的符号链接，
日志切分时，把当前写入的符号链接指向另一个日志文件即可

五，查看go.mod中的版本信息:

1.  
   module github.com/liuhongdi/zaplog2
2.  
    
3.  
   go 1.15
4.  
    
5.  
   require (
6.  
   github.com/lestrrat/go-file-rotatelogs v0.0.0-20180223000712-d3151e2a480f // indirect
7.  
   github.com/lestrrat/go-strftime v0.0.0-20180220042222-ba3bf9c1d042 // indirect
8.  
   github.com/pkg/errors v0.9.1 // indirect
9.  
   go.uber.org/multierr v1.6.0 // indirect
10.  
    go.uber.org/zap v1.16.0 // indirect
11.  
    )