Add systemd_exporter

Systemd_exporter is now needed to expose data from the systemd managed
processes

Signed-off-by: Julien Godin <julien.godin@camptocamp.com>

data/defaults.yaml

@@ -228,6 +228,13 @@ prometheus::statsd_exporter::package_name: 'statsd_exporter'
 prometheus::statsd_exporter::service_name: 'statsd_exporter'
 prometheus::statsd_exporter::user: 'statsd-exporter'
 prometheus::statsd_exporter::version: '0.17.0'
+prometheus::systemd_exporter::download_extension: 'tar.gz'
+prometheus::systemd_exporter::download_url_base: 'https://github.com/povilasv/systemd_exporter/releases'
+prometheus::systemd_exporter::extra_groups: []
+prometheus::systemd_exporter::group: 'systemd-exporter'
+prometheus::systemd_exporter::package_name: 'systemd_exporter'
+prometheus::systemd_exporter::user: 'systemd-exporter'
+prometheus::systemd_exporter::version: '0.5.0'
 prometheus::storage_retention: '360h' # 15d; "d" suffix is only supported with prom >= 2.*
 prometheus::blackbox_exporter::user: 'blackbox-exporter'
 prometheus::blackbox_exporter::group: 'blackbox-exporter'

manifests/systemd_exporter.pp

@@ -0,0 +1,116 @@
+# @summary This module manages prometheus node redis_exporter
+# @param arch
+#  Architecture (amd64 or i386)
+# @param bin_dir
+#  Directory where binaries are located
+# @param download_extension
+#  Extension for the release binary archive
+# @param download_url
+#  Complete URL corresponding to the where the release binary archive can be downloaded
+# @param download_url_base
+#  Base URL for the binary archive
+# @param extra_groups
+#  Extra groups to add the binary user to
+# @param extra_options
+#  Extra options added to the startup command
+#  For a full list of the exporter's supported extra options
+#  please refer to https://github.com/oliver006/redis_exporter
+# @param group
+#  Group under which the binary is running
+# @param init_style
+#  Service startup scripts style (e.g. rc, upstart or systemd)
+# @param install_method
+#  Installation method: url or package (only url is supported currently)
+# @param manage_group
+#  Whether to create a group for or rely on external code for that
+# @param manage_service
+#  Should puppet manage the service? (default true)
+# @param manage_user
+#  Whether to create user or rely on external code for that
+# @param namespace
+#  Namespace for the metrics, defaults to `redis`.
+# @param os
+#  Operating system (linux is the only one supported)
+# @param package_name
+#  The binary package name - not available yet
+# @param purge_config_dir
+#  Purge config files no longer generated by Puppet
+# @param restart_on_change
+#  Should puppet restart the service on configuration change? (default true)
+# @param service_enable
+#  Whether to enable the service from puppet (default true)
+# @param service_ensure
+#  State ensured for the service (default 'running')
+# @param service_name
+#  Name of the node exporter service (default 'redis_exporter')
+# @param user
+#  User which runs the service
+# @param version
+#  The binary release version
+class prometheus::systemd_exporter (
+  String $download_extension,
+  Prometheus::Uri $download_url_base ,
+  Array[String] $extra_groups,
+  String[1] $group,
+  String[1] $package_name,
+  String[1] $user,
+  String[1] $version,
+  Boolean $purge_config_dir               = true,
+  Boolean $restart_on_change              = true,
+  Boolean $service_enable                 = true,
+  Stdlib::Ensure::Service $service_ensure = 'running',
+  String[1] $service_name                 = 'systemd_exporter',
+  Prometheus::Initstyle $init_style       = $facts['service_provider'],
+  Prometheus::Install $install_method     = $prometheus::install_method,
+  Boolean $manage_group                   = true,
+  Boolean $manage_service                 = true,
+  Boolean $manage_user                    = true,
+  String[1] $namespace                    = 'systemd',
+  String[1] $os                           = downcase($facts['kernel']),
+  String $extra_options                   = '',
+  Optional[Prometheus::Uri] $download_url = undef,
+  String[1] $arch                         = $prometheus::real_arch,
+  String[1] $bin_dir                      = $prometheus::bin_dir,
+  Boolean $export_scrape_job              = false,
+  Optional[Stdlib::Host] $scrape_host     = undef,
+  Stdlib::Port $scrape_port               = 9558,
+  String[1] $scrape_job_name              = 'systemd',
+  Optional[Hash] $scrape_job_labels       = undef,
+) inherits prometheus {
+  $release = "v${version}"
+
+  $real_download_url = pick($download_url, "${download_url_base}/download/${release}/${package_name}-${version}.${os}-${arch}.${download_extension}")
+  $notify_service = $restart_on_change ? {
+    true    => Service[$service_name],
+    default => undef,
+  }
+  $options = $extra_options
+
+  prometheus::daemon { $service_name:
+    install_method     => 'url',
+    version            => $version,
+    download_extension => $download_extension,
+    os                 => $os,
+    arch               => $arch,
+    bin_dir            => $bin_dir,
+    notify_service     => $notify_service,
+    package_name       => $package_name,
+    manage_user        => $manage_user,
+    user               => $user,
+    extra_groups       => $extra_groups,
+    real_download_url  => $real_download_url,
+    group              => $group,
+    manage_group       => $manage_group,
+    purge              => $purge_config_dir,
+    options            => $options,
+    init_style         => $init_style,
+    service_ensure     => $service_ensure,
+    service_enable     => $service_enable,
+    manage_service     => $manage_service,
+    export_scrape_job  => $export_scrape_job,
+    scrape_host        => $scrape_host,
+    scrape_port        => $scrape_port,
+    scrape_job_name    => $scrape_job_name,
+    scrape_job_labels  => $scrape_job_labels,
+  }
+}