Use `consul` service discovery to register `prometheus` monitoring.

cookbooks/prometheus/files/etc/consul.d/service-node_exporter.json

@@ -0,0 +1,6 @@
+{
+  "service": {
+    "name": "node_exporter",
+    "port": 60000
+  }
+}

cookbooks/prometheus/files/etc/prometheus.d/prometheus.yml

@@ -44,14 +44,12 @@ scrape_configs:
       - targets: ['localhost:9090']
 
   - job_name: 'node'
-
-    # metrics_path defaults to '/metrics'
-    # scheme defaults to 'http'.
     metrics_path: /node_exporter/metrics
 
-    file_sd_configs:
-      - files:
-        - '/etc/prometheus.d/targets/targets.yml'
+    consul_sd_configs:
+    - server: 'localhost:8500'
+      services:
+        - 'node_exporter'
 
 alerting:
   alertmanagers:

cookbooks/prometheus/node_exporter_setup.rb

@@ -7,6 +7,15 @@ remote_file '/etc/supervisor/conf.d/node_exporter.conf' do
   notifies :restart, 'service[supervisor]'
 end
 
+# Deploy `consul` config for `node_exporter`:
+remote_file '/etc/consul.d/service-node_exporter.json' do
+  owner 'root'
+  group 'root'
+  mode '644'
+
+  notifies :restart, 'service[supervisor]'
+end
+
 service 'supervisor' do
   action :nothing
 end