add base config

roles/prometheus/tasks/main.yml

@@ -10,3 +10,23 @@
   register: apt_result
   retries: 3
   until: apt_result is succeeded
+
+- name: Ensure the alert folder exist
+  file:
+    path: /etc/prometheus/alerts
+    state: directory
+    group: prometheus
+    owner: prometheus
+    mode: u=rwx,g=rx,o=rx
+
+- name: Setup the prometheus config
+  template:
+    src: prometheus.yml
+    dest: /etc/prometheus/prometheus.yml
+    owner: root
+    group: root
+    mode: '0640'
+  notify: Reload prometheus
+  no_log: true
+
+

roles/prometheus/templates/prometheus.yml

@@ -0,0 +1,39 @@
+{{ ansible_managed | comment }}
+
+global:
+  # scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  # evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # 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:
+  - "alerts/*.yml"
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: 'prometheus'
+
+    # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+
+    static_configs:
+      - targets: ['localhost:9090']
+
+  - job_name: node
+    # If prometheus-node-exporter is installed, grab stats about the local
+    # machine by default.
+    static_configs:
+      - targets: ['localhost:9100']