prometheus: new role

roles/prometheus/handlers/main.yml

@@ -0,0 +1,4 @@
+---
+
+- name: Restart prometheus
+  service: name=prometheus state=restarted

roles/prometheus/tasks/main.yml

@@ -0,0 +1,14 @@
+---
+
+- name: Enable backports for prometheus
+  apt_repository: repo='deb http://httpredir.debian.org/debian stretch-backports main'
+
+- name: Install prometheus
+  apt: name=prometheus default_release='stretch-backports'
+
+- name: Configure prometheus
+  template: src=prometheus.yml.j2 dest=/etc/prometheus/prometheus.yml
+  notify: Restart prometheus
+
+- name: Enable prometheus
+  service: name=prometheus state=started enabled=yes

roles/prometheus/templates/prometheus.yml.j2

@@ -0,0 +1,35 @@
+# Sample config for Prometheus.
+
+global:
+  scrape_interval:     60s
+  evaluation_interval: 60s
+  # scrape_timeout is set to the global default (10s).
+
+  # Attach these labels to any time series or alerts when communicating with
+  # external systems (federation, remote storage, Alertmanager).
+  external_labels:
+      monitor: 'example'
+
+# Alertmanager configuration
+alerting:
+  alertmanagers:
+  - static_configs:
+    - targets:
+      # - localhost:9093
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+{% if node_targets is defined %}
+- job_name: node
+    static_configs:
+      - targets:
+{% for target in node_targets %}
+        - {{ target }}
+{% endfor %}
+{% endif %}

site.yml

@@ -26,6 +26,7 @@
   hosts: nabia.binary.kitchen
   roles:
   - librenms
+  - prometheus
   - racktables
   - uau
   - acme