Merge remote-tracking branch 'tigerfell/pr257'

[chef.git] / cookbooks / prometheus / resources / exporter.rb

diff --git a/cookbooks/prometheus/resources/exporter.rb b/cookbooks/prometheus/resources/exporter.rb
index fd6e854678f86a236210116d3784f7df454159dc..7ff729211b2738fae6a442c4ce1c9b7da8900357 100644 (file)
--- a/cookbooks/prometheus/resources/exporter.rb
+++ b/cookbooks/prometheus/resources/exporter.rb
@@ -17,44 +17,33 @@
 # limitations under the License.
 #
 
+unified_mode true
+
 default_action :create
 
 property :exporter, :kind_of => String, :name_property => true
-property :github_owner, :kind_of => String, :default => "prometheus"
-property :github_project, :kind_of => String
-property :version, :kind_of => String, :required => [:create]
+property :address, :kind_of => String
 property :port, :kind_of => Integer, :required => [:create]
 property :listen_switch, :kind_of => String, :default => "web.listen-address"
+property :listen_type, :kind_of => String, :default => "address"
+property :user, :kind_of => String, :default => "root"
+property :command, :kind_of => String
 property :options, :kind_of => [String, Array]
+property :environment, :kind_of => Hash, :default => {}
+property :service, :kind_of => String
+property :scrape_interval, :kind_of => String
+property :metric_relabel, :kind_of => Array
+property :register_target, :kind_of => [TrueClass, FalseClass], :default => true
 
 action :create do
-  package "prometheus-#{new_resource.exporter}-exporter" do
-    action :purge
-  end
-
-  remote_file archive_file do
-    action :create_if_missing
-    source archive_url
-    owner "root"
-    group "root"
-    mode "644"
-    backup false
-  end
-
-  execute archive_file do
-    action :nothing
-    command "tar -xf #{archive_file}"
-    cwd "/opt/prometheus"
-    user "root"
-    group "root"
-    subscribes :run, "remote_file[#{archive_file}]"
-  end
-
   systemd_service service_name do
+    after "network-online.target"
+    wants "network-online.target"
     description "Prometheus #{new_resource.exporter} exporter"
     type "simple"
-    user "root"
-    exec_start "#{executable_path} #{executable_options}"
+    user new_resource.user
+    environment new_resource.environment
+    exec_start "#{executable_path} #{new_resource.command} #{executable_options}"
     private_tmp true
     protect_system "strict"
     protect_home true
@@ -75,7 +64,16 @@ action :create do
     only_if { node[:prometheus][:mode] == "external" }
   end
 
-  node.default[:prometheus][:exporters][new_resource.exporter] = listen_address
+  node.default[:prometheus][:addresses][new_resource.exporter] = listen_address
+
+  if new_resource.register_target
+    node.default[:prometheus][:exporters][new_resource.port] = {
+      :name => new_resource.exporter,
+      :address => listen_address,
+      :scrape_interval => new_resource.scrape_interval,
+      :metric_relabel => new_resource.metric_relabel
+    }
+  end
 end
 
 action :delete do
@@ -83,41 +81,57 @@ action :delete do
     action [:disable, :stop]
   end
 
-  package package_name do
-    action :purge
+  systemd_service service_name do
+    action :delete
   end
 end
 
-action_class do
-  def github_project
-    new_resource.github_project || "#{new_resource.exporter}_exporter"
-  end
-
-  def archive_url
-    "https://github.com/#{new_resource.github_owner}/#{github_project}/releases/download/v#{new_resource.version}/#{github_project}-#{new_resource.version}.linux-amd64.tar.gz"
+action :restart do
+  service service_name do
+    action :restart
+    only_if { service_exists? }
   end
+end
 
-  def archive_file
-    "#{Chef::Config[:file_cache_path]}/prometheus-#{new_resource.exporter}-exporter-#{new_resource.version}.tar.gz"
+action_class do
+  def service_name
+    if new_resource.service
+      "prometheus-#{new_resource.service}-exporter"
+    else
+      "prometheus-#{new_resource.exporter}-exporter"
+    end
   end
 
-  def service_name
-    "prometheus-#{new_resource.exporter}-exporter"
+  def service_exists?
+    ::File.exist?("/etc/systemd/system/#{service_name}.service")
   end
 
   def executable_path
-    "/opt/prometheus/#{github_project}-#{new_resource.version}.linux-amd64/#{github_project}"
+    "/opt/prometheus-exporters/exporters/#{new_resource.exporter}/#{new_resource.exporter}_exporter"
   end
 
   def executable_options
-    "--#{new_resource.listen_switch}=#{listen_address} #{Array(new_resource.options).join(' ')}"
+    "--#{new_resource.listen_switch}=#{listen_argument} #{Array(new_resource.options).join(' ')}"
+  end
+
+  def listen_argument
+    case new_resource.listen_type
+    when "address" then listen_address
+    when "url" then "http://#{listen_address}/metrics"
+    end
   end
 
   def listen_address
-    if node[:prometheus][:mode] == "wireguard"
+    if new_resource.address
+      "#{new_resource.address}:#{new_resource.port}"
+    elsif node[:prometheus][:mode] == "wireguard"
       "[#{node[:prometheus][:address]}]:#{new_resource.port}"
     else
       "#{node[:prometheus][:address]}:#{new_resource.port}"
     end
   end
 end
+
+def after_created
+  subscribes :restart, "git[/opt/prometheus-exporters]"
+end