From 1a530ed7ded214ec56f304bce2cc017691722d9e Mon Sep 17 00:00:00 2001
From: Kazuhiro MUSASHI <simoom634@yahoo.co.jp>
Date: Sat, 24 Oct 2020 13:07:11 +0900
Subject: [PATCH] Modify monitoring condition for Kernel differences.

---
 .../files/etc/prometheus.d/alerts/node_exporter.yml           | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml b/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml
index 587a999..b80d301 100644
--- a/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml
+++ b/cookbooks/prometheus/files/etc/prometheus.d/alerts/node_exporter.yml
@@ -176,8 +176,8 @@ groups:
       description: "At least one device in RAID array on {{ $labels.instance }} failed. Array {{ $labels.md_device }} needs attention and possibly a disk swap\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"
 
   - alert: HostKernelVersionDeviations
-    expr: count(sum(label_replace(node_uname_info, "kernel", "$1", "release", "([0-9]+.[0-9]+.[0-9]+).*")) by (kernel)) > 1
-    for: 5m
+    expr: count(sum(label_replace(node_uname_info, "kernel", "$1", "release", "([0-9]+.[0-9]+.[0-9]+).*")) by (kernel)) > 2
+    for: 24h
     labels:
       severity: warning
     annotations: