From 82441537ff2ace901784d21d87101b44a46a5fbe Mon Sep 17 00:00:00 2001
From: Aliaksandr Valialkin <valyala@gmail.com>
Date: Sun, 28 Feb 2021 15:09:28 +0200
Subject: [PATCH] lib/promscrape/discovery/kubernetes: pre-populate labelsByKey
 in reloadObject()

---
 lib/promscrape/discovery/kubernetes/api.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/promscrape/discovery/kubernetes/api.go b/lib/promscrape/discovery/kubernetes/api.go
index ca77b10de..913826a3a 100644
--- a/lib/promscrape/discovery/kubernetes/api.go
+++ b/lib/promscrape/discovery/kubernetes/api.go
@@ -305,8 +305,13 @@ func (uw *urlWatcher) reloadObjects() string {
 		logger.Errorf("cannot parse response from %q: %s", requestURL, err)
 		return ""
 	}
+	labelsByKey := make(map[string][]map[string]string, len(objectsByKey))
+	for k, o := range objectsByKey {
+		labelsByKey[k] = o.getTargetLabels(uw)
+	}
 	uw.mu.Lock()
 	uw.objectsByKey = objectsByKey
+	uw.labelsByKey = labelsByKey
 	uw.mu.Unlock()
 	return metadata.ResourceVersion
 }