prometheus: Add snmp exporter

Mostly hardcoded for now

roles/prometheus/templates/prometheus.yml.j2

@@ -10,6 +10,27 @@ scrape_configs:
       - targets:
         - "127.0.0.1:9090"
 
+  - job_name: snmp
+    scheme: https
+    tls_config:
+      ca_file: "{{ tls_certs }}/ca.crt"
+      key_file: "{{ tls_private }}/{{ inventory_hostname }}.key"
+      cert_file: "{{ tls_certs }}/{{ inventory_hostname }}.crt"
+    static_configs:
+      - targets:
+        - 172.20.25.102
+    metrics_path: /snmp
+    params:
+      auth: [public_v2]
+      module: [if_mib]
+    relabel_configs:
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - target_label: __address__
+        replacement: nms.home.foo.sh:9116
+
   - job_name: node
     scheme: https
     tls_config: