fix: adding octopus_exporter compose

ansible/inventory/host_vars/london-c.yml

@@ -3,3 +3,6 @@ host_role: idle
 host_description: "Idle/available"
 host_location: "London"
 prometheus_location: london
+
+docker_services:
+  - octopus-exporter

ansible/services/octopus-exporter/docker-compose.yml

@@ -0,0 +1,11 @@
+---
+# octopus-exporter - Octopus Energy metrics for Prometheus
+# Host: london-c (100.123.72.87)
+
+services:
+  octopus-exporter:
+    image: rwejlgaard/octopus_exporter:v1.1.0
+    container_name: octopus_exporter
+    restart: unless-stopped
+    ports:
+      - "9359:9359"

ansible/services/prometheus/prometheus.yml.j2

@@ -22,7 +22,15 @@ scrape_configs:
 
   - job_name: "octopus_exporter"
     static_configs:
-      - targets: ["100.123.72.87:9359"]
+{% for host in groups['all'] | sort %}
+{% set h = hostvars[host] %}
+{% if 'octopus-exporter' in (h.docker_services | default([])) %}
+      - targets: ["{{ h.ansible_host }}:9359"]
+        labels:
+          location: {{ h.prometheus_location }}
+          server: {{ host }}
+{% endif %}
+{% endfor %}
 
   - job_name: "node_exporter"
     static_configs: