OP#630 edit alloy scraping

templates/config.alloy.erb

@@ -53,24 +53,34 @@ loki.write "loki" {
 }
 <% end -%>
 <% if @ay_manage_prom == true -%>
-// Metrics collection
-prometheus.exporter.unix "system_metrics" {
-  include_exporter_metrics = true
-  disable_collectors       = ["mdadm"]
+// 1. Exporter (or keep your existing node_exporter binary)
+prometheus.exporter.unix "node" {
+  // optional: disable unused collectors
+  // disable_collectors = ["ipvs", "btrfs", ...]
 }
 
-prometheus.scrape "scrape_system" {
-  targets    = prometheus.exporter.unix.system_metrics.targets
-  forward_to = [prometheus.remote_write.prometheus.receiver]
-  scrape_interval = "15s"
+// 2. Relabel the targets so instance = real hostname
+discovery.relabel "node_exporter" {
+  targets = prometheus.exporter.unix.node.targets
+
+  rule {
+    target_label = "instance"
+    replacement  = constants.hostname   // <-- this is the key
+  }
+
+  rule {
+    target_label = "job"
+    replacement  = "integrations/node_exporter"   // or whatever job name you prefer
+  }
 }
-<% if @ay_manage_ne == true -%>
+
+// 3. Scrape the properly labeled targets
 prometheus.scrape "node_exporter" {
-  targets = [{ __address__ = "localhost:9100" }]
-  forward_to = [prometheus.remote_write.prometheus.receiver]
+  targets         = discovery.relabel.node_exporter.output
+  forward_to      = [prometheus.remote_write.prometheus.receiver]
   scrape_interval = "15s"
 }
-<% end -%>
+
 prometheus.remote_write "prometheus" {
   endpoint {
     url = "<%= @ay_prom_url %>"