我的Golang应用程序中有一个logrus日志处理程序。日志使用JSONFormatter格式化,并作为一行提交给Datadog,Datadog对其进行汇总并很好地显示它们。但是,我最近发现了一个未解决的恐慌的情况,而logrus记录器不是捕获到这种情况。这导致实际的恐慌和堆栈跟踪分布在多条输出线上,Datadog会分别收集它们。这会花费我们金钱,并使日志非常难以阅读。
我将解决此问题,但是如果发生任何进一步的未解决的恐慌,我希望能够使用logrus JSONFormatter捕获它们。
类似这样的东西:
package main
import (
"os"
"sync"
"github.com/sirupsen/logrus"
)
var (
loggerInstance *logrus.Entry
once sync.Once
logger = GetLogger()
)
// GetLogger initializes and returns a reference to a CustomLogger object.
func GetLogger() *logrus.Entry {
once.Do(func() {
logrus.SetFormatter(&logrus.JSONFormatter{})
// We'll just pipe everything to stdout. It's json so Datadog will parse the level regardless
logrus.SetOutput(os.Stdout)
logrus.SetLevel(logrus.TraceLevel) // We'll leave this as trace and just filter out logs when we index them
loggerInstance = logrus.WithFields(logrus.Fields{"env": "local"}) // Add env tag for easy log parsing
})
return loggerInstance
}
func main() {
logger.Info("Logrus using json logging")
logger.Warn("We are about to panic")
var things = []string{
"hi",
"yes",
"thing"}
print("%s", things[len(things)])
}
这将产生以下输出。如您所见,前两个日志使用logrus,但未处理的恐慌则不使用。
{"env":"local","level":"info","msg":"Logrus using json logging","time":"2020-03-03T15:12:30-08:00"}
{"env":"local","level":"warning","msg":"We are about to panic","time":"2020-03-03T15:12:30-08:00"}
panic: runtime error: index out of range
goroutine 1 [running]:
main.main()
/Users/nathan.deren/Library/Preferences/GoLand2019.3/scratches/scratch.go:38 +0xbe
Process finished with exit code 2
是否可以使用logrus记录最后几行?
答案 0 :(得分:1)
尝试(find-if #'consp '(notdefinedsymbol)) ; ==> nil
捕获所有恐慌并将其记录下来。否则,它将把恐慌消息写入stderr:
recover