From 695131994b5a749e129fb304e8ba709acd37afe8 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Fri, 26 May 2023 21:34:14 +0200
Subject: add support for chrony_exporter (replaces textfile collector)

---
 roles/monitoring/prometheus/server/defaults/main/main.yml  |  1 +
 .../prometheus/server/defaults/main/rules_chrony.yml       | 14 ++++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 roles/monitoring/prometheus/server/defaults/main/rules_chrony.yml

(limited to 'roles/monitoring/prometheus/server/defaults/main')

diff --git a/roles/monitoring/prometheus/server/defaults/main/main.yml b/roles/monitoring/prometheus/server/defaults/main/main.yml
index d778bad8..1e0dcf32 100644
--- a/roles/monitoring/prometheus/server/defaults/main/main.yml
+++ b/roles/monitoring/prometheus/server/defaults/main/main.yml
@@ -22,6 +22,7 @@ prometheus_server_rules:
   prometheus: "{{ prometheus_server_rules_prometheus + ((prometheus_server_alertmanager is defined) | ternary(prometheus_server_rules_prometheus_alertmanager, [])) + prometheus_server_rules_prometheus_extra }}"
   node: "{{ prometheus_server_rules_node + prometheus_server_rules_node_extra }}"
   openwrt: "{{ prometheus_server_rules_openwrt + prometheus_server_rules_openwrt_extra }}"
+  chrony: "{{ prometheus_server_rules_chrony + prometheus_server_rules_chrony_extra }}"
   nut: "{{ prometheus_server_rules_nut + prometheus_server_rules_nut_extra }}"
   nut/ups: "{{ prometheus_server_rules_nut__ups + prometheus_server_rules_nut__ups_extra }}"
   blackbox: "{{ prometheus_server_rules_blackbox + prometheus_server_rules_blackbox_extra }}"
diff --git a/roles/monitoring/prometheus/server/defaults/main/rules_chrony.yml b/roles/monitoring/prometheus/server/defaults/main/rules_chrony.yml
new file mode 100644
index 00000000..e845a60b
--- /dev/null
+++ b/roles/monitoring/prometheus/server/defaults/main/rules_chrony.yml
@@ -0,0 +1,14 @@
+---
+prometheus_server_rules_chrony_extra: []
+prometheus_server_rules_chrony:
+  - record: instance:chrony_clock_error_seconds:abs
+    expr: abs(chrony_tracking_last_offset_seconds) + chrony_tracking_root_dispersion_seconds + (0.5 * chrony_tracking_root_delay_seconds)
+
+  - alert: ChronyUnreachable
+    expr: chrony_up == 0
+    for: 0m
+    labels:
+      severity: critical
+    annotations:
+      summary: Unable to scrape chrony metrics (instance {{ '{{' }} $labels.instance {{ '}}' }})
+      description: "The chrony process might have crashed.\n  VALUE = {{ '{{' }} $value {{ '}}' }}\n  LABELS = {{ '{{' }} $labels {{ '}}' }}"
-- 
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