From 6645af20158b84888b97ac03484a98579ed17cfb Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Thu, 18 May 2023 17:36:05 +0200
Subject: prometheus: add modbus exporter

---
 .../prometheus/exporter/modbus/tasks/main.yml      | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 roles/monitoring/prometheus/exporter/modbus/tasks/main.yml

(limited to 'roles/monitoring/prometheus/exporter/modbus/tasks')

diff --git a/roles/monitoring/prometheus/exporter/modbus/tasks/main.yml b/roles/monitoring/prometheus/exporter/modbus/tasks/main.yml
new file mode 100644
index 00000000..1dbd8b27
--- /dev/null
+++ b/roles/monitoring/prometheus/exporter/modbus/tasks/main.yml
@@ -0,0 +1,58 @@
+---
+- name: generate apt pin file for exporter-modbus package
+  when: prometheus_exporter_modbus_version is defined
+  copy:
+    dest: "/etc/apt/preferences.d/prom-exporter-modbus.pref"
+    content: |
+      Package: prom-exporter-modbus
+      Pin: version {{ prometheus_exporter_modbus_version }}-1
+      Pin-Priority: 1001
+
+- name: remove apt pin file for exporter-modbus package
+  when: prometheus_exporter_modbus_version is not defined
+  file:
+    path: "/etc/apt/preferences.d/prom-exporter-modbus.pref"
+    state: absent
+
+- name: install apt packages
+  apt:
+    name: "prom-exporter-modbus{% if prometheus_exporter_modbus_version is defined %}={{ prometheus_exporter_modbus_version }}-1{% endif %}"
+    state: present
+    allow_downgrade: yes
+  notify: restart prometheus-modbus-exporter
+
+- name: create config directory
+  file:
+    path: /etc/prometheus/exporter/modbus
+    state: directory
+
+- name: generate configuration
+  template:
+    src: config.yml.j2
+    dest: /etc/prometheus/exporter/modbus/config.yml
+  notify: reload prometheus-modbus-exporter
+
+- name: generate systemd service unit
+  template:
+    src: service.j2
+    dest: /etc/systemd/system/prometheus-modbus-exporter.service
+  notify: restart prometheus-modbus-exporter
+
+- name: make sure prometheus-modbus-exporter is enabled and started
+  systemd:
+    name: prometheus-modbus-exporter.service
+    daemon_reload: yes
+    state: started
+    enabled: yes
+
+- name: register exporter
+  copy:
+    content: |
+      location = /modbus {
+          proxy_pass http://127.0.0.1:9602/metrics;
+      }
+      location = /modbus/probe {
+          proxy_pass http://127.0.0.1:9602/modbus;
+      }
+    dest: /etc/prometheus/exporter/modbus.locations
+  notify: reload nginx
-- 
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