Add ICMP checks

ansible/roles/forrest/files/prometheus/blackbox.yml

@@ -17,3 +17,6 @@ modules:
         - header: Location
           regexp: ^https
       preferred_ip_protocol: ip4  # Docker network is v4 only
+
+  icmp:
+    prober: icmp

ansible/roles/forrest/files/prometheus/prometheus.yml

@@ -69,6 +69,24 @@ scrape_configs:
       - target_label: __address__
         replacement: blackbox-external:9115
 
+  - job_name: blackbox_icmp
+    scrape_interval: 10m
+    metrics_path: /probe
+    params:
+      module: [icmp]
+    static_configs:
+      - targets:
+          - "{{ pve_hosts.pve.ip }}"
+          - "{{ pve_hosts.homeassistant.ip }}"
+          - 9.9.9.9
+    relabel_configs:
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - target_label: __address__
+        replacement: blackbox:9115
+
   - job_name: blackbox_https_redir
     scrape_interval: 10m
     metrics_path: /probe