`go get -u github.com/xiaomeng79/go-log`

    //引入包
    import "github.com/xiaomeng79/go-log"
    
    //默认使用zap 插件
    log.Info("test")
    //输出日志:{"level":"info","@timestamp":"2018-11-01T15:04:47.079+0800","caller":"go-log/log_test.go:21","msg":"test","project":"zap test"}
    
    //使用context包来记录分布式跟踪日志,配合OpenTracing链路跟踪实现代码分析
    // 使用链路跟踪
    sp := opentracing.StartSpan("operation_name")
    defer sp.Finish()
    ctx := opentracing.ContextWithSpan(context.Background(), sp)
    // 使用ctx来将跟踪信息记录到日志
    log.Info("test",ctx)
    //输出日志:{"level":"info","@timestamp":"2018-11-01T15:04:47.079+0800","caller":"go-log/log_test.go:21","msg":"hello world","project":"zap test","trace_id":"3ece70e8f602a46d","parent_id":"5e57855e4f15604c","span_id":"791c3d0180bb66ad"}

如果需要自定义跟踪信息,格式如下(将istio的请求头中的X-B3-的跟踪信息取出来,拼成以下格式):
格式 traceid:spanid:parentid:1  46b1506e7332f7c1:7f75737aa70629cc:3bb947500f42ad71:1

ctx := context.WithValue(ctx,tracer.LogTraceKey,"46b1506e7332f7c1:7f75737aa70629cc:3bb947500f42ad71:1")


只需要将带有链路信息的context放到日志方法的末尾即可，必须是最后一个参数
如：
不带格式化参数：   log.Info("test",ctx)

待格式化参数的：  log.Debugf("this is zap test %s","test",ctx)

	LogPath string = "/var/log" //日志保存路径
	LogName string = "output" //日志保存的名称，不些随机生成
	LogLevel string = "debug"  //日志记录级别
	MaxSize int = 100 //日志分割的尺寸 MB
	MaxAge int = 7 //分割日志保存的时间 day
	Stacktrace string = "error" //记录堆栈的级别
	IsStdOut string  = "yes"//是否标准输出console输出 yes 输出 no 不输出
	ProjectName string = "test" //项目名称

`
	//初始化zap
	//引入包
	import (
    	"github.com/xiaomeng79/go-log/conf"
    	"github.com/xiaomeng79/go-log/plugins/zaplog"
    )
    //初始化
    SetLogger(zaplog.New(
        conf.WithProjectName("zap test"),
        conf.WithLogPath("tmp"),
        conf.WithLogLevel("info"),
        ))

    //使用
    log.Debugf("this is zap test %s","test",ctx)

`

`
	//初始化zap
	//引入包
	import (
    	"github.com/xiaomeng79/go-log/conf"
    	"github.com/xiaomeng79/go-log/plugins/logrus"
    )
    //初始化
    SetLogger(logrus.New(
        conf.WithProjectName("logrus test"),
        ... 不写执行默认参数
        ))

    //使用
    log.Debugf("this is logrus test %s","test",ctx)
`