add option to include node exporter

manifests/main/yumrepo.pp

@@ -6,7 +6,6 @@
 class alloy_cd::main::yumrepo (
 
 ) inherits alloy_cd::params {
-
   # test
   yumrepo { 'grafana':
     ensure   => 'present',

manifests/params.pp

@@ -8,6 +8,8 @@
 # @param [String] ay_loki_userpass the password to logon to loki
 # @param [Boolean] ay_manage_loki whether to manage log forwarding to loki
 # @param [Boolean] ay_manage_prom whether to manage metric forwarding
+# @param [Boolean] ay_manage_ne whether to manage metric forwarding for
+#   the node exporter (external)
 # @param [String] ay_prom_url the url where alloy will send metrics
 # @param [Array] ay_log_targets the logging targets
 # @summary Class contains all parameters for the alloy_cd module.
@@ -28,6 +30,9 @@ class alloy_cd::params (
   Boolean $ay_manage_prom     = true,
   String $ay_prom_url         = 'https://prometheus.example.net/api/v1/write',
 
+# node exporter (external)
+  Boolean $ay_manage_ne       = false,
+
 ) {
   # service
   $ay_service         = 'alloy'

templates/config.alloy.erb

@@ -64,7 +64,15 @@ prometheus.scrape "scrape_system" {
   forward_to = [prometheus.remote_write.prometheus.receiver]
   scrape_interval = "15s"
 }
-
+<% if @ay_manage_ne == true -%>
+prometheus.scrape "node_exporter" {
+  targets = [
+    { __address__ = "localhost:9100" },)
+  ]
+  forward_to      = [prometheus.remote_write.prometheus.receiver]
+  scrape_interval = "15s"
+}
+<% end %>
 prometheus.remote_write "prometheus" {
   endpoint {
     url = "<%= @ay_prom_url %>"