Add monitoring host with prometheus role

ansible/roles/prometheus/tasks/templates/prometheus.service.j2

@@ -0,0 +1,15 @@
+[Unit]
+Description=Prometheus Server
+Documentation=https://prometheus.io
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+User=prometheus
+Group=prometheus
+Type=simple
+ExecStart=/usr/local/bin/prometheus --config.file=/etc/prometheus/prometheus.yml --storage.tsdb.path=/var/lib/prometheus/
+
+[Install]
+WantedBy=multi-user.target
+

ansible/roles/prometheus/tasks/templates/prometheus.yml.j2

@@ -0,0 +1,18 @@
+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.
+
+alerting:
+  alertmanagers:
+    - static_configs:
+        - targets:
+          # - alertmanager:9093
+
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+
+scrape_configs:
+  - job_name: "prometheus"
+    static_configs:
+      - targets: ["localhost:9090"]