Move the node_exporter port to an attribute

site-cookbooks/kosmos_prometheus/recipes/node_exporter.rb

@@ -8,6 +8,8 @@ checksum = node["kosmos_prometheus"]["node_exporter"]["checksum"]
 tarball = "#{Chef::Config[:file_cache_path]}/node_exporter-#{version}.linux-amd64.tar.gz"
 binary_url = "https://github.com/prometheus/node_exporter/releases/download/v#{version}/node_exporter-#{version}.linux-amd64.tar.gz"
 
+node_exporter_port = node["node_exporter"]["port"]
+
 group "node_exporter"
 
 user "node_exporter" do
@@ -56,7 +58,7 @@ systemd_unit "node_exporter.service" do
       Type: "simple",
       User: "node_exporter",
       Group: "node_exporter",
-      ExecStart: "/usr/local/bin/node_exporter --web.listen-address=:9100 --collector.textfile.directory=/var/lib/node_exporter/textfile",
+      ExecStart: "/usr/local/bin/node_exporter --web.listen-address=:#{node_exporter_port} --collector.textfile.directory=/var/lib/node_exporter/textfile",
       Restart: "on-failure",
       RestartSec: "5",
       NoNewPrivileges: "yes",
@@ -76,7 +78,7 @@ service "node_exporter" do
 end
 
 firewall_rule "node_exporter" do
-  port 9100
+  port node_exporter_port
   source "10.1.1.0/24"
   protocol :tcp
   command :allow