From aad38c8283efacc9f5ce14158364d7f30885cbe4 Mon Sep 17 00:00:00 2001
From: Aliaksandr Valialkin <valyala@gmail.com>
Date: Thu, 25 Jun 2020 17:18:55 +0300
Subject: [PATCH] lib/promrelabel: properly apply `^` and `$` anchors to
 `regex` value in Prometheus relabeling rules

---
 lib/promrelabel/config.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/promrelabel/config.go b/lib/promrelabel/config.go
index 5a5d602861..ec0fc91f93 100644
--- a/lib/promrelabel/config.go
+++ b/lib/promrelabel/config.go
@@ -63,7 +63,7 @@ func parseRelabelConfig(dst []ParsedRelabelConfig, rc *RelabelConfig) ([]ParsedR
 	if rc.Regex != nil {
 		regex := *rc.Regex
 		if rc.Action != "replace_all" && rc.Action != "labelmap_all" {
-			regex = "^" + *rc.Regex + "$"
+			regex = "^(?:" + *rc.Regex + ")$"
 		}
 		re, err := regexp.Compile(regex)
 		if err != nil {