From deae3a4324530220511a7e156050c32a8fcd7c5c Mon Sep 17 00:00:00 2001
From: Johannes Christ <jc@jchri.st>
Date: Wed, 1 May 2024 16:24:12 +0200
Subject: [PATCH] Set up Prometheus alerting on Netcup

---
 ansible/roles/prometheus/defaults/main.yml |  6 ++++--
 ansible/roles/prometheus/tasks/main.yml    | 14 ++++++++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/ansible/roles/prometheus/defaults/main.yml b/ansible/roles/prometheus/defaults/main.yml
index fbefe918..fc2da504 100644
--- a/ansible/roles/prometheus/defaults/main.yml
+++ b/ansible/roles/prometheus/defaults/main.yml
@@ -19,8 +19,7 @@ prometheus_configuration:
 
   # Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
   rule_files:
-    # - "first_rules.yml"
-    # - "second_rules.yml"
+    - "rules.yml"
 
   # A scrape configuration containing exactly one endpoint to scrape:
   # Here it's Prometheus itself.
@@ -43,3 +42,6 @@ prometheus_configuration:
       # machine by default.
       static_configs:
         - targets: ['localhost:9100']
+
+prometheus_rules:
+  groups: []
diff --git a/ansible/roles/prometheus/tasks/main.yml b/ansible/roles/prometheus/tasks/main.yml
index b1bb67ad..797d8a5a 100644
--- a/ansible/roles/prometheus/tasks/main.yml
+++ b/ansible/roles/prometheus/tasks/main.yml
@@ -31,3 +31,17 @@
     - role::prometheus
   notify:
     - Reload the prometheus service
+
+- name: Configure prometheus rules
+  copy:
+    content: |
+      # Ansible managed
+      {{ prometheus_rules | to_nice_yaml }}
+    dest: /etc/prometheus/rules.yml
+    owner: prometheus
+    group: prometheus
+    mode: "0400"
+  tags:
+    - role::prometheus
+  notify:
+    - Reload the prometheus service