From 6bb1b5b87542c78ed6ee9164d6d0258c27bbd884 Mon Sep 17 00:00:00 2001
From: Marc CARRE <carre.marc@gmail.com>
Date: Fri, 6 Oct 2017 12:33:52 +0100
Subject: [PATCH] Add ability to register hooks to underlying logger.

---
 log/log.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/log/log.go b/log/log.go
index 04e906c07..c167fff72 100644
--- a/log/log.go
+++ b/log/log.go
@@ -345,6 +345,11 @@ func Fatalf(format string, args ...interface{}) {
 	baseLogger.sourced().Fatalf(format, args...)
 }
 
+// AddHook adds hook to Prometheus' original logger.
+func AddHook(hook logrus.Hook) {
+	origLogger.Hooks.Add(hook)
+}
+
 type errorLogWriter struct{}
 
 func (errorLogWriter) Write(b []byte) (int, error) {