package main
import (
	"fmt"
	"os"
	"path/filepath"
	"time"
	"github.com/alecthomas/kingpin/v2"
	"github.com/go-kit/log"
	"github.com/go-kit/log/level"
	"github.com/prometheus/common/promlog"
	promlogflag "github.com/prometheus/common/promlog/flag"
	"github.com/prometheus/common/version"
)
var (
	videos = "https://space.bilibili.com/600805398/channel/series"
	docs   = "https://www.cnblogs.com/yinzhengjie"
	// 命令行解析
	app = kingpin.New(filepath.Base(os.Args[0]), fmt.Sprintf("yinzhengjie-devops'server Program, docs: %s, videos: %s", docs, videos))
	// 指定配置文件
	configFile = app.Flag("config.file", "configuration file path").Short('c').Default("yinzhengjie-devops-server.yaml").String()
)
// Logger用于設(shè)置prometheus的Logger，
func Logger(config *promlog.Config) log.Logger {
	var (
		l  log.Logger
		le level.Option
	)
	// 設(shè)置日志的輸出格式
	if config.Format.String() == "logfmt" {
		l = log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
	} else {
		l = log.NewJSONLogger(log.NewSyncWriter(os.Stderr))
	}
	// 設(shè)置日志級(jí)別
	switch config.Level.String() {
	case "debug":
		le = level.AllowDebug()
	case "info":
		le = level.AllowInfo()
	case "warn":
		le = level.AllowWarn()
	case "error":
		le = level.AllowError()
	}
	l = level.NewFilter(l, le)
	// CST可視為美國、澳大利亞、古巴或中國的標(biāo)準(zhǔn)時(shí)間，CST可以為如下4個(gè)不同的時(shí)區(qū)的縮寫：
	// 		美國中部時(shí)間：Central Standard Time (USA) UT-6:00
	// 		澳大利亞中部時(shí)間：Central Standard Time (Australia) UT+9:30
	// 		中國標(biāo)準(zhǔn)時(shí)間：China Standard Time UT+8:00
	// 		古巴標(biāo)準(zhǔn)時(shí)間：Cuba Standard Time UT-4:00
	//
	// 重新設(shè)置一下時(shí)區(qū)，否則是UTC時(shí)間，建議設(shè)置CST時(shí)區(qū)，我們以北京的東八區(qū)時(shí)間為準(zhǔn)。
	l = log.With(l, "cts", log.TimestampFormat(
		func() time.Time { return time.Now().Local() },
		"2006-01-02T15:04:05.000Z08:00",
	), "caller", log.DefaultCaller)
	return l
}
func main() {
	// 版本信息
	// app.Version("v1.0")
	app.Version(version.Print("yinzhengjie-devops-server"))
	// 幫助信息
	app.HelpFlag.Short('h')
	promlogConfig := promlog.Config{}
	promlogflag.AddFlags(app, &promlogConfig)
	// 強(qiáng)制解析
	kingpin.MustParse(app.Parse(os.Args[1:]))
	fmt.Printf("configFile: %s\n", *configFile)
	// 設(shè)置prometheus的logger
	var logger log.Logger = Logger(&promlogConfig)
	// 輸出日志事件時(shí)需要指定日志級(jí)別，此處我指定的日志級(jí)別為"info"
	level.Info(logger).Log(
		// 注意，寫入的數(shù)據(jù)成對(duì)出現(xiàn)，比如下面的案例我就寫了5對(duì)測試數(shù)據(jù)。
		"Name", "尹正杰",
		"Hobby", "Golang K8S Docker",
		"blog", "https://www.cnblogs.com/yinzhengjie",
		"cfg", *configFile,
		"age", 18,
	)
}

go build -o server -ldflags "-X 'github.com/prometheus/common/version.BuildUser=y1053419035@qq.com' -X 'github.com/prometheus/common/version.BuildDate=`date`' -X 'github.com/prometheus/common/version.Version=v0.2'" src/models/server/server.go

1.查看服務(wù)的版本信息
./server --version
	2.指定程序的配置文件
./server -c /etc/nginx/conf.d/games.conf
	3.查看程序的幫助信息
./server -h
	4.不指定任何參數(shù)
./server
	5.指定日志輸出格式
./server --log.format=json
	6.同時(shí)指定多個(gè)參數(shù)
./server --log.format=json -c /etc/nginx/nginx.conf