From c26294b0a5ac7e6317817b115341de129fc9643f Mon Sep 17 00:00:00 2001
From: Alexandre Iooss <erdnaxe@crans.org>
Date: Sun, 19 Jan 2020 18:57:38 +0100
Subject: [PATCH] Warn when orphans packages are present

---
 roles/prometheus/templates/prometheus/alert.rules.yml.j2 | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/roles/prometheus/templates/prometheus/alert.rules.yml.j2 b/roles/prometheus/templates/prometheus/alert.rules.yml.j2
index 1a58fd38..b3722096 100644
--- a/roles/prometheus/templates/prometheus/alert.rules.yml.j2
+++ b/roles/prometheus/templates/prometheus/alert.rules.yml.j2
@@ -150,6 +150,14 @@ groups:
     annotations:
       summary: "{{ $value }} paquet(s) APT sont inutile(s) sur {{ $labels.instance }}."
 
+  - alert: AptOrphans
+    expr: apt_orphans > 0
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "{{ $value }} paquet(s) APT sont orphelin(s) sur {{ $labels.instance }}."
+
   # NTP (need NTP plugin in node)
 #  - alert: ntp_drifting
 #    expr: node_ntp_drift_seconds > 0.05