Add community prometheus cookbook

cookbooks/prometheus/resources/job.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+provides :prometheus_job
+unified_mode true
+
+property :scrape_interval, String
+property :scrape_timeout, String
+property :labels, Hash
+property :target, [Array, String], required: true
+property :metrics_path, String, default: '/metrics'
+property :config_file, String, default: '/opt/prometheus/prometheus.yml'
+property :allow_external_config, [true, false], default: false
+
+default_action :create
+
+action :create do
+  job_resource = new_resource
+
+  with_run_context :root do
+    edit_resource(:template, job_resource.config_file) do
+      variables[:jobs] ||= {}
+      variables[:jobs][job_resource.name] ||= {}
+      variables[:jobs][job_resource.name]['scrape_interval'] = job_resource.scrape_interval
+      variables[:jobs][job_resource.name]['scrape_timeout'] = job_resource.scrape_timeout
+      variables[:jobs][job_resource.name]['target'] = job_resource.target
+      variables[:jobs][job_resource.name]['metrics_path'] = job_resource.metrics_path
+      variables[:jobs][job_resource.name]['labels'] = job_resource.labels
+
+      action :nothing
+      delayed_action :create
+
+      not_if { job_resource.allow_external_config }
+    end
+  end
+end
+
+action :delete do
+  file new_resource.config_file do
+    action :delete
+  end
+end