feat: add vmcluster static targets (#426)

- add ability to list static targets for vmagent to scrape
- add vyos router to be scraped

Reviewed-on: #426

hieradata/roles/infra/metrics/vmagent.yaml

@@ -3,6 +3,16 @@ hiera_include:
   - vmcluster::vmagent
 
 vmcluster::vmagent::enable: true
+vmcluster::vmagent::static_targets:
+  vyos_node:
+    targets:
+      - '198.18.21.160:9100'
+    scrape_interval: '15s'
+    metrics_path: '/metrics'
+    scheme: 'http'
+    labels:
+      instance: 'syrtvm0001.main.unkin.net'
+      job: 'vyos_node'
 vmcluster::vmagent::options:
   tls: 'true'
   tlsCertFile: '/etc/pki/tls/vault/certificate.crt'

modules/vmcluster/manifests/vmagent.pp

@@ -10,6 +10,7 @@ class vmcluster::vmagent (
   Stdlib::Absolutepath $vars_file = '/etc/default/vmagent',
   String  $consul_node_token      = $facts['consul_node_token'],
   Hash[String, Variant[String, Array[String]]] $options = {},
+  Hash[String, Hash] $static_targets = {},
 ) {
 
   # if enabled, manage this service

modules/vmcluster/templates/vmagent.scrape.yaml.erb

@@ -35,3 +35,28 @@ scrape_configs:
       - source_labels: [__meta_consul_tag_metrics_job]
         target_label: job
         action: replace
+
+<% if @static_targets -%>
+<% @static_targets.each do |job_name, config| -%>
+  - job_name: '<%= job_name %>'
+    static_configs:
+<% config['targets'].each do |target| -%>
+      - targets: ['<%= target %>']
+<% if config['labels'] -%>
+        labels:
+<% config['labels'].each do |label_name, label_value| -%>
+          <%= label_name %>: '<%= label_value %>'
+<% end -%>
+<% end -%>
+<% end -%>
+<% if config['scrape_interval'] -%>
+    scrape_interval: <%= config['scrape_interval'] %>
+<% end -%>
+<% if config['metrics_path'] -%>
+    metrics_path: <%= config['metrics_path'] %>
+<% end -%>
+<% if config['scheme'] -%>
+    scheme: <%= config['scheme'] %>
+<% end -%>
+<% end -%>
+<% end -%>