Merge pull request voxpupuli#171 from blupman/master

add varnish_exporter

README.md

@@ -41,7 +41,7 @@ This module automates the install and configuration of Prometheus monitoring too
 * Installs a configuration file for prometheus daemon (/etc/prometheus/prometheus.yaml) or for alertmanager (/etc/prometheus/alert.rules)
 * Manages the services via upstart, sysv, or systemd
 * Optionally creates alert rules
-* The following exporters are currently implemented: node_exporter, statsd_exporter, process_exporter, haproxy_exporter, mysqld_exporter, blackbox_exporter, consul_exporter, redis_exporter
+* The following exporters are currently implemented: node_exporter, statsd_exporter, process_exporter, haproxy_exporter, mysqld_exporter, blackbox_exporter, consul_exporter, redis_exporter, varnish_exporter
 
 ## Usage
 

data/defaults.yaml

@@ -251,3 +251,11 @@ prometheus::redis_exporter::package_name: 'redis_exporter'
 prometheus::redis_exporter::user: 'redis-exporter'
 prometheus::redis_exporter::version: '0.11.2'
 prometheus::user: 'prometheus'
+prometheus::varnish_exporter::download_extension: 'tar.gz'
+prometheus::varnish_exporter::download_url_base: 'https://github.com/jonnenauha/prometheus_varnish_exporter/releases'
+prometheus::varnish_exporter::extra_groups: []
+prometheus::varnish_exporter::group: 'varnish'
+prometheus::varnish_exporter::package_ensure: 'latest'
+prometheus::varnish_exporter::package_name: 'prometheus_varnish_exporter'
+prometheus::varnish_exporter::user: 'varnish_exporter'
+prometheus::varnish_exporter::version: '1.4'

manifests/varnish_exporter.pp

@@ -0,0 +1,129 @@
+# Class: prometheus::varnish_exporter
+#
+# This module manages prometheus varnish_exporter
+#
+# Parameters:
+#  [*arch*]
+#  Architecture (amd64 or i386)
+#
+#  [*bin_dir*]
+#  Directory where binaries are located
+#
+#  [*cnf_scrape_uri*]
+#  The URI to obtain HAProxy 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::varnish_exporter(
+  String $download_extension,
+  Array $extra_groups,
+  String $group,
+  String $package_ensure,
+  String $package_name,
+  String $user,
+  String $version,
+  Variant[Stdlib::HTTPUrl, Stdlib::HTTPSUrl] $download_url_base,
+  Boolean $purge_config_dir      = true,
+  Boolean $restart_on_change     = true,
+  Boolean $service_enable        = true,
+  $service_ensure                = 'running',
+  String $init_style             = $prometheus::init_style,
+  String $install_method         = $prometheus::install_method,
+  Boolean $manage_group          = true,
+  Boolean $manage_service        = true,
+  Boolean $manage_user           = true,
+  String $os                     = $prometheus::os,
+  String $extra_options          = '',
+  Optional[String] $download_url = undef,
+  String $arch                   = $prometheus::arch,
+  Stdlib::Absolutepath $bin_dir  = $prometheus::bin_dir,
+) inherits prometheus {
+
+  $real_download_url = pick($download_url,"${download_url_base}/download/${version}/${package_name}-${version}.${os}-${arch}.${download_extension}")
+  $notify_service = $restart_on_change ? {
+    true    => Service[$package_name],
+    default => undef,
+  }
+
+  $options = " ${extra_options}"
+  prometheus::daemon { $package_name:
+    install_method     => $install_method,
+    version            => $version,
+    download_extension => $download_extension,
+    os                 => $os,
+    arch               => $arch,
+    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,
+    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,
+  }
+}

spec/classes/varnish_exporter_spec.rb

@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+describe 'prometheus::varnish_exporter' do
+  on_supported_os.each do |os, facts|
+    context "on #{os}" do
+      let(:facts) do
+        facts.merge(os_specific_facts(facts))
+      end
+
+      context 'with version specified' do
+        let(:params) do
+          {
+            version: '1.4',
+            arch: 'amd64',
+            os: 'linux',
+            bin_dir: '/usr/local/bin'
+          }
+        end
+
+        describe 'install correct binary' do
+          it { is_expected.to contain_file('/usr/local/bin/prometheus_varnish_exporter').with('target' => '/opt/prometheus_varnish_exporter-1.4.linux-amd64/prometheus_varnish_exporter') }
+        end
+        describe 'required resources' do
+          it { is_expected.to contain_group('varnish') }
+          it { is_expected.to contain_prometheus__daemon('prometheus_varnish_exporter') }
+          it { is_expected.to contain_service('prometheus_varnish_exporter') }
+          it { is_expected.to contain_user('varnish_exporter') }
+        end
+      end
+    end
+  end
+end