From a731a43302a0525affd3bd1253d901ad99786453 Mon Sep 17 00:00:00 2001
From: Dominik Schulz <dominik.schulz@gauner.org>
Date: Fri, 3 Nov 2017 12:59:04 +0100
Subject: [PATCH] Guard against tags being nil in EC2 discovery

Fixes #3001
---
 discovery/ec2/ec2.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/discovery/ec2/ec2.go b/discovery/ec2/ec2.go
index b96cdc449..902c67d7b 100644
--- a/discovery/ec2/ec2.go
+++ b/discovery/ec2/ec2.go
@@ -200,6 +200,9 @@ func (d *Discovery) refresh() (tg *config.TargetGroup, err error) {
 				}
 
 				for _, t := range inst.Tags {
+					if t == nil || t.Key == nil || t.Value == nil {
+						continue
+					}
 					name := strutil.SanitizeLabelName(*t.Key)
 					labels[ec2LabelTag+model.LabelName(name)] = model.LabelValue(*t.Value)
 				}