From ead7db708e6ba351bbb796da163bdde7985a6d6e Mon Sep 17 00:00:00 2001
From: Samuel Berthe <dev@samuel-berthe.fr>
Date: Sun, 11 Oct 2020 21:38:48 +0200
Subject: [PATCH] alert on containers CPU: add a comment to exclude cAdvisor

---
 _data/rules.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/_data/rules.yml b/_data/rules.yml
index d16033a..aa825c8 100644
--- a/_data/rules.yml
+++ b/_data/rules.yml
@@ -245,6 +245,9 @@ groups:
                 description: Container CPU usage is above 80%
                 query: "(sum(rate(container_cpu_usage_seconds_total[3m])) BY (instance, name) * 100) > 80"
                 severity: warning
+                comments: |
+                  cAdvisor can sometimes consume a lot of CPU, so this alert will fire constantly.
+                  If you want to exclude it from this alert, just use: container_cpu_usage_seconds_total{name!=""}
               - name: Container Memory usage
                 description: Container Memory usage is above 80%
                 query: "(sum(container_memory_working_set_bytes) BY (instance, name) / sum(container_spec_memory_limit_bytes > 0) BY (instance, name) * 100) > 80"