Enable scraping of additional hosts from Prometheus

roles/stats/defaults/main.yml

@@ -32,3 +32,7 @@ stats_grafana_memory: 1g
 stats_prometheus_retention_time: 365d
 stats_prometheus_retention_size: 30GB
 stats_collection_interval: 15s
+
+# uncomment to scrape more hosts
+# stats_prometheus_additional_hosts:
+#  - 192.168.1.1:9100

roles/stats/tasks/prometheus.yml

@@ -18,7 +18,7 @@
 
 - name: Template Prometheus config
   template:
-    src: prometheus.yml
+    src: prometheus.yml.j2
     dest: "{{ stats_prometheus_config_directory }}/prometheus.yml"
   register: prometheus_config
 

roles/stats/templates/prometheus.yml.j2

@@ -43,3 +43,16 @@ scrape_configs:
                     "{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}:{{ stats_speedtest_exporter_port }}"
                  ]
 
+{% if stats_prometheus_additional_hosts is defined %}
+  - job_name: "additional_hosts"
+    static_configs:
+      - targets: [
+{% for host in stats_prometheus_additional_hosts %}
+    {{ host }}
+    {% if not loop.last %}
+        ,
+    {% endif %}
+                 ]
+{% endfor %}
+{% endif %}
+