Add prometheus role

roles/prometheus/templates/prometheus.yml.j2

@@ -0,0 +1,55 @@
+---
+# {{ ansible_managed }}
+
+global:
+  scrape_interval: 10s
+  evaluation_interval: 10s
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files:
+  - "/etc/prometheus/recording/*.yaml"
+  - "/etc/prometheus/alerting/*.yaml"
+
+scrape_configs:
+  - job_name: prometheus
+    static_configs:
+      - targets:
+          - localhost:9090
+
+  - job_name: blackbox
+    static_configs:
+      - targets:
+          - blackbox-exporter:9115
+
+  - job_name: node
+    static_configs:
+      - targets:
+          - host.containers.internal:9100
+
+{% if prometheus_ping_hosts | length > 0 %}
+  - job_name: "icmp"
+    metrics_path: "/probe"
+    params:
+      module: ["icmp"]
+    static_configs:
+      - targets:
+{% for host in prometheus_ping_hosts %}
+          - "{{ host.name }}::{{ host.type | default('monitored') }}"
+{% endfor %}
+    relabel_configs:
+      - source_labels:
+          - __address__
+        regex: '(.+)::(.+)'
+        target_label: __param_target
+        replacement: '${1}'
+      - source_labels:
+          - __address__
+        regex: '(.+)::(.+)'
+        target_label: host_type
+        replacement: '${2}'
+      - source_labels:
+          - __param_target
+        target_label: instance
+      - target_label: __address__
+        replacement: blackbox_exporter:9115
+{%- endif %}