Add monitoring role

roles/monitoring/tasks/prometheus.yaml

@@ -0,0 +1,27 @@
+---
+- name: Install dependencies
+  apt:
+    name: prometheus
+
+- name: Configure Prometheus
+  template:
+    src: prometheus.yml
+    dest: "{{ prometheus_config_dir }}/prometheus.yml"
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart prometheus
+
+- name: Configure Prometheus args
+  lineinfile:
+    path: /etc/default/prometheus
+    line: >-
+      ARGS="
+      --storage.tsdb.retention.time={{ prometheus_storage_retention }}
+      --storage.tsdb.retention.size=0
+      --web.listen-address={{ prometheus_web_listen_address }}
+      --web.external-url=prometheus
+      --config.file={{ prometheus_config_dir }}/prometheus.yml
+      "
+    regexp: '^ARGS'
+  notify: restart prometheus