Add mongodb_exporter

manifests/mongodb_exporter.pp

@@ -0,0 +1,132 @@
+# Class: prometheus::mongodb_exporter
+#
+# This module manages prometheus mongodb_exporter
+#
+# Parameters:
+#  [*arch*]
+#  Architecture (amd64 or i386)
+#
+#  [*bin_dir*]
+#  Directory where binaries are located
+#
+#  [*cnf_uri*]
+#  The URI to obtain MongoDB stats from
+#
+#  [*download_extension*]
+#  Extension for the release binary archive
+#
+#  [*download_url*]
+#  Complete URL corresponding to the where the release binary archive can be downloaded
+#
+#  [*download_url_base*]
+#  Base URL for the binary archive
+#
+#  [*extra_groups*]
+#  Extra groups to add the binary user to
+#
+#  [*extra_options*]
+#  Extra options added to the startup command
+#
+#  [*group*]
+#  Group under which the binary is running
+#
+#  [*init_style*]
+#  Service startup scripts style (e.g. rc, upstart or systemd)
+#
+#  [*install_method*]
+#  Installation method: url or package (only url is supported currently)
+#
+#  [*manage_group*]
+#  Whether to create a group for or rely on external code for that
+#
+#  [*manage_service*]
+#  Should puppet manage the service? (default true)
+#
+#  [*manage_user*]
+#  Whether to create user or rely on external code for that
+#
+#  [*os*]
+#  Operating system (linux is the only one supported)
+#
+#  [*package_ensure*]
+#  If package, then use this for package ensure default 'latest'
+#
+#  [*package_name*]
+#  The binary package name - not available yet
+#
+#  [*purge_config_dir*]
+#  Purge config files no longer generated by Puppet
+#
+#  [*restart_on_change*]
+#  Should puppet restart the service on configuration change? (default true)
+#
+#  [*service_enable*]
+#  Whether to enable the service from puppet (default true)
+#
+#  [*service_ensure*]
+#  State ensured for the service (default 'running')
+#
+#  [*user*]
+#  User which runs the service
+#
+#  [*version*]
+#  The binary release version
+class prometheus::mongodb_exporter (
+  String $arch                        = $::prometheus::params::arch,
+  String $bin_dir                     = $::prometheus::params::bin_dir,
+  String $cnf_uri                     = $::prometheus::params::mongodb_exporter_cnf_uri,
+  String $download_extension          = $::prometheus::params::mongodb_exporter_download_extension,
+  Variant[Undef,String] $download_url = undef,
+  String $download_url_base           = $::prometheus::params::mongodb_exporter_download_url_base,
+  Array $extra_groups                 = $::prometheus::params::mongodb_exporter_extra_groups,
+  String $extra_options               = '',
+  String $group                       = $::prometheus::params::mongodb_exporter_group,
+  String $init_style                  = $::prometheus::params::init_style,
+  String $install_method              = $::prometheus::params::install_method,
+  Boolean $manage_group               = true,
+  Boolean $manage_service             = true,
+  Boolean $manage_user                = true,
+  String $os                          = $::prometheus::params::os,
+  String $package_ensure              = $::prometheus::params::mongodb_exporter_package_ensure,
+  String $package_name                = $::prometheus::params::mongodb_exporter_package_name,
+  Boolean $purge_config_dir           = true,
+  Boolean $restart_on_change          = true,
+  Boolean $service_enable             = true,
+  String $service_ensure              = 'running',
+  String $user                        = $::prometheus::params::mongodb_exporter_user,
+  String $version                     = $::prometheus::params::mongodb_exporter_version,
+) inherits prometheus::params {
+  #Please provide the download_url for versions < 0.9.0
+  $real_download_url = pick($download_url,"${download_url_base}/download/v${version}/${package_name}-${version}.${os}-${arch}.${download_extension}")
+
+  $notify_service = $restart_on_change ? {
+    true    => Service['mongodb_exporter'],
+    default => undef,
+  }
+
+  $options = "-mongodb.uri=${cnf_uri} ${extra_options}"
+
+  prometheus::daemon { 'mongodb_exporter':
+    install_method     => $install_method,
+    version            => $version,
+    download_extension => $download_extension,
+    os                 => $os,
+    arch               => $arch,
+    real_download_url  => $real_download_url,
+    bin_dir            => $bin_dir,
+    notify_service     => $notify_service,
+    package_name       => $package_name,
+    package_ensure     => $package_ensure,
+    manage_user        => $manage_user,
+    user               => $user,
+    extra_groups       => $extra_groups,
+    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,
+  }
+}

manifests/params.pp

@@ -62,6 +62,15 @@
   $mysqld_exporter_package_name = 'mysqld_exporter'
   $mysqld_exporter_user = 'mysqld-exporter'
   $mysqld_exporter_version = '0.9.0'
+  $mongodb_exporter_cnf_uri = 'mongodb://localhost:27017'
+  $mongodb_exporter_download_extension = 'tar.gz'
+  $mongodb_exporter_download_url_base = 'https://github.com/percona/mongodb_exporter/releases'
+  $mongodb_exporter_extra_groups = []
+  $mongodb_exporter_group = 'mongodb-exporter'
+  $mongodb_exporter_package_ensure = 'latest'
+  $mongodb_exporter_package_name = 'mongodb_exporter'
+  $mongodb_exporter_user = 'mongodb-exporter'
+  $mongodb_exporter_version = '0.3.1'
   $node_exporter_collectors = ['diskstats','filesystem','loadavg','meminfo','netdev','stat','time']
   $node_exporter_download_extension = 'tar.gz'
   $node_exporter_download_url_base = 'https://github.com/prometheus/node_exporter/releases'

spec/classes/mongodb_exporter_spec.rb

@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+describe 'prometheus::mongodb_exporter' do
+  on_supported_os.each do |os, facts|
+    context "on #{os}" do
+      let(:facts) do
+        facts
+      end
+
+      context 'with version specified' do
+        let(:params) do
+          {
+            version: '0.3.0',
+            arch: 'amd64',
+            os: 'linux'
+          }
+        end
+
+        describe 'compile manifest' do
+          it { is_expected.to compile.with_all_deps }
+        end
+
+        describe 'install correct binary' do
+          it { is_expected.to contain_file('/usr/local/bin/mongodb_exporter').with('target' => '/opt/mongodb_exporter-0.3.0.linux-amd64/mongodb_exporter') }
+        end
+      end
+    end
+  end
+end