From b362c4a1b1462b1ccf26750752c2147615508f52 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Sat, 17 Dec 2022 18:21:12 +0100
Subject: add prometheus snmp exporter

---
 roles/monitoring/prometheus/server/defaults/main/main.yml     |  2 ++
 .../monitoring/prometheus/server/defaults/main/rules_snmp.yml | 11 +++++++++++
 .../prometheus/server/defaults/main/rules_snmp__probe.yml     | 11 +++++++++++
 .../prometheus/server/templates/targets/snmp/probe.yml.j2     |  5 +++++
 4 files changed, 29 insertions(+)
 create mode 100644 roles/monitoring/prometheus/server/defaults/main/rules_snmp.yml
 create mode 100644 roles/monitoring/prometheus/server/defaults/main/rules_snmp__probe.yml
 create mode 100644 roles/monitoring/prometheus/server/templates/targets/snmp/probe.yml.j2

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

diff --git a/roles/monitoring/prometheus/server/defaults/main/main.yml b/roles/monitoring/prometheus/server/defaults/main/main.yml
index 375b3458..b377a7f0 100644
--- a/roles/monitoring/prometheus/server/defaults/main/main.yml
+++ b/roles/monitoring/prometheus/server/defaults/main/main.yml
@@ -29,6 +29,8 @@ prometheus_server_rules:
   ssl/probe: "{{ prometheus_server_rules_ssl__probe + prometheus_server_rules_ssl__probe_extra }}"
   smokeping: "{{ prometheus_server_rules_smokeping + prometheus_server_rules_smokeping_extra }}"
   bind: "{{ prometheus_server_rules_bind + prometheus_server_rules_bind_extra }}"
+  snmp: "{{ prometheus_server_rules_snmp + prometheus_server_rules_snmp_extra }}"
+  snmp/probe: "{{ prometheus_server_rules_snmp__probe + prometheus_server_rules_snmp__probe_extra }}"
 
 # prometheus_server_alertmanager:
 #   url: "127.0.0.1:9093"
diff --git a/roles/monitoring/prometheus/server/defaults/main/rules_snmp.yml b/roles/monitoring/prometheus/server/defaults/main/rules_snmp.yml
new file mode 100644
index 00000000..7aec66c4
--- /dev/null
+++ b/roles/monitoring/prometheus/server/defaults/main/rules_snmp.yml
@@ -0,0 +1,11 @@
+---
+prometheus_server_rules_snmp_extra: []
+prometheus_server_rules_snmp:
+  - alert: SNMPRequestErrors
+    expr: increase(snmp_request_errors_total[1m]) > 0
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: SNMP Exporter reports request errors (instance {{ '{{' }} $labels.instance {{ '}}' }})
+      description: "SNMP expoter on {{ '{{' }} $labels.instance {{ '}}' }} reports request errors \n  VALUE = {{ '{{' }} $value {{ '}}' }}\n  LABELS = {{ '{{' }} $labels {{ '}}' }}"
diff --git a/roles/monitoring/prometheus/server/defaults/main/rules_snmp__probe.yml b/roles/monitoring/prometheus/server/defaults/main/rules_snmp__probe.yml
new file mode 100644
index 00000000..548144c2
--- /dev/null
+++ b/roles/monitoring/prometheus/server/defaults/main/rules_snmp__probe.yml
@@ -0,0 +1,11 @@
+---
+prometheus_server_rules_snmp__probe_extra: []
+prometheus_server_rules_snmp__probe:
+  - alert: SNMPSlowScrape
+    expr: snmp_scrape_duration_seconds > 5
+    for: 0m
+    labels:
+      severity: warning
+    annotations:
+      summary: SNMP slow scrape  (instance {{ '{{' }} $labels.instance {{ '}}' }})
+      description: "Scraping SNMP target took more than 5 seconds \n  VALUE = {{ '{{' }} $value {{ '}}' }}\n  LABELS = {{ '{{' }} $labels {{ '}}' }}"
diff --git a/roles/monitoring/prometheus/server/templates/targets/snmp/probe.yml.j2 b/roles/monitoring/prometheus/server/templates/targets/snmp/probe.yml.j2
new file mode 100644
index 00000000..47e6dceb
--- /dev/null
+++ b/roles/monitoring/prometheus/server/templates/targets/snmp/probe.yml.j2
@@ -0,0 +1,5 @@
+- targets: [ '{{ (target.exporter_hostname == prometheus_server) | ternary('127.0.0.1:9999', hostvars[target.exporter_hostname].prometheus_scrape_endpoint) }}' ]
+  labels:
+    instance: '{{ target.instance }}'
+    __param_target: '{{ target.config.target }}'
+    __param_module: '{{ target.config.module }}'
-- 
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