Add support for gnocchi_api_uwsgi_config in Debian

This patch is adding the configuration of the number of workers,
threads, and the size of the listen queue in Debian, which uses
uwsgi to run Gnocchi API. Therefore, this patch adds a new
gnocchi_api_uwsgi_config providers as well as a new
gnocchi::wsgi::uwsgi_api class.

Change-Id: Iea9a674be86902be46fdc124e6d0ecf0c1ec8961

lib/puppet/provider/gnocchi_api_uwsgi_config/openstackconfig.rb

@@ -0,0 +1,10 @@
+Puppet::Type.type(:gnocchi_api_uwsgi_config).provide(
+  :openstackconfig,
+  :parent => Puppet::Type.type(:openstack_config).provider(:ruby)
+) do
+
+  def self.file_path
+    '/etc/gnocchi/gnocchi-api-uwsgi.ini'
+  end
+
+end

lib/puppet/type/gnocchi_api_uwsgi_config.rb

@@ -0,0 +1,29 @@
+Puppet::Type.newtype(:gnocchi_api_uwsgi_config) do
+
+  ensurable
+
+  newparam(:name, :namevar => true) do
+    desc 'Section/setting name to manage from /etc/gnocchi/gnocchi-api-uwsgi.ini'
+    newvalues(/\S+\/\S+/)
+  end
+
+  newproperty(:value) do
+    desc 'The value of the setting to be defined.'
+    munge do |value|
+      value = value.to_s.strip
+      value.capitalize! if value =~ /^(true|false)$/i
+      value
+    end
+    newvalues(/^[\S ]*$/)
+  end
+
+  newparam(:ensure_absent_val) do
+    desc 'A value that is specified as the value property will behave as if ensure => absent was specified'
+    defaultto('<SERVICE DEFAULT>')
+  end
+
+  autorequire(:anchor) do
+    ['gnocchi::install::end']
+  end
+
+end

manifests/deps.pp

@@ -29,6 +29,11 @@ class gnocchi::deps {
   -> Openstacklib::Policy::Base<||>
   ~> Anchor['gnocchi::config::end']
 
+  # On any uwsgi config change, we must restart gnocchi-api.
+  Anchor['gnocchi::config::begin']
+  -> Gnocchi_api_uwsgi_config<||>
+  ~> Anchor['gnocchi::config::end']
+
   # Installation or config changes will always restart services.
   Anchor['gnocchi::install::end'] ~> Anchor['gnocchi::service::begin']
   Anchor['gnocchi::config::end']  ~> Anchor['gnocchi::service::begin']

manifests/wsgi/uwsgi.pp

@@ -0,0 +1,41 @@
+#
+# Copyright 2021 Thomas Goirand <zigo@debian.org>
+#
+# Author: Thomas Goirand <zigo@debian.org>
+#
+# == Class: gnocchi::wsgi::uwsgi
+#
+# Configure the UWSGI service for Gnocchi API.
+#
+# == Parameters
+#
+# [*processes*]
+#   (Optional) Number of processes.
+#   Defaults to $::os_workers.
+#
+# [*threads*]
+#   (Optional) Number of threads.
+#   Defaults to 32.
+#
+# [*listen_queue_size*]
+#   (Optional) Socket listen queue size.
+#   Defaults to 100
+#
+class gnocchi::wsgi::uwsgi (
+  $processes         = $::os_workers,
+  $threads           = 32,
+  $listen_queue_size = 100,
+){
+
+  include gnocchi::deps
+
+  if $::os_package_type != 'debian'{
+    warning('This class is only valid for Debian, as other operating systems are not using uwsgi by default.')
+  }
+
+  gnocchi_api_uwsgi_config {
+    'uwsgi/processes': value => $processes;
+    'uwsgi/threads':   value => $threads;
+    'uwsgi/listen':    value => $listen_queue_size;
+  }
+}

releasenotes/notes/uwsgi-55ad851a66baa5e9.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    A new class gnocchi::wsgi::uwsgi exist to allow configuring uwsgi in
+    operating systems that support this (ie: currently Debian). This helps
+    configuring the number of processes, threads and listen socket.
+    Also, a new gnocchi_api_wsgi_config provider now exist.

spec/classes/gnocchi_wsgi_uwsgi_spec.rb

@@ -0,0 +1,31 @@
+require 'spec_helper'
+
+describe 'gnocchi::wsgi::uwsgi' do
+
+  shared_examples 'gnocchi::wsgi::uwsgi' do
+    context 'with default parameters' do
+      it {
+        should contain_class('gnocchi::deps')
+      }
+
+      it {
+        is_expected.to contain_gnocchi_api_uwsgi_config('uwsgi/processes').with_value(facts[:os_workers])
+        is_expected.to contain_gnocchi_api_uwsgi_config('uwsgi/threads').with_value('32')
+        is_expected.to contain_gnocchi_api_uwsgi_config('uwsgi/listen').with_value('100')
+      }
+    end
+  end
+
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts({
+          :os_workers => 8,
+        }))
+      end
+      it_behaves_like 'gnocchi::wsgi::uwsgi'
+    end
+  end
+end

spec/unit/provider/gnocchi_api_uwsgi_config/openstackconfig_spec.rb

@@ -0,0 +1,63 @@
+$LOAD_PATH.push(
+  File.join(
+    File.dirname(__FILE__),
+    '..',
+    '..',
+    '..',
+    'fixtures',
+    'modules',
+    'inifile',
+    'lib')
+)
+$LOAD_PATH.push(
+  File.join(
+    File.dirname(__FILE__),
+    '..',
+    '..',
+    '..',
+    'fixtures',
+    'modules',
+    'openstacklib',
+    'lib')
+)
+require 'spec_helper'
+provider_class = Puppet::Type.type(:gnocchi_api_uwsgi_config).provider(:openstackconfig)
+describe provider_class do
+
+  it 'should default to the default setting when no other one is specified' do
+    resource = Puppet::Type::Gnocchi_api_uwsgi_config.new(
+      {:name => 'DEFAULT/foo', :value => 'bar'}
+    )
+    provider = provider_class.new(resource)
+    expect(provider.section).to eq('DEFAULT')
+    expect(provider.setting).to eq('foo')
+  end
+
+  it 'should allow setting to be set explicitly' do
+    resource = Puppet::Type::Gnocchi_api_uwsgi_config.new(
+      {:name => 'dude/foo', :value => 'bar'}
+    )
+    provider = provider_class.new(resource)
+    expect(provider.section).to eq('dude')
+    expect(provider.setting).to eq('foo')
+  end
+
+  it 'should ensure absent when <SERVICE DEFAULT> is specified as a value' do
+    resource = Puppet::Type::Gnocchi_api_uwsgi_config.new(
+      {:name => 'dude/foo', :value => '<SERVICE DEFAULT>'}
+    )
+    provider = provider_class.new(resource)
+    provider.exists?
+    expect(resource[:ensure]).to eq :absent
+  end
+
+  it 'should ensure absent when value matches ensure_absent_val' do
+    resource = Puppet::Type::Gnocchi_api_uwsgi_config.new(
+      {:name => 'dude/foo', :value => 'foo', :ensure_absent_val => 'foo' }
+    )
+    provider = provider_class.new(resource)
+    provider.exists?
+    expect(resource[:ensure]).to eq :absent
+  end
+
+end

spec/unit/type/gnocchi_api_uwsgi_config_spec.rb

@@ -0,0 +1,64 @@
+require 'puppet'
+require 'puppet/type/gnocchi_api_uwsgi_config'
+
+describe 'Puppet::Type.type(:gnocchi_api_uwsgi_config)' do
+  before :each do
+    @gnocchi_api_uwsgi_config = Puppet::Type.type(:gnocchi_api_uwsgi_config).new(:name => 'DEFAULT/foo', :value => 'bar')
+  end
+
+ it 'should require a name' do
+    expect {
+      Puppet::Type.type(:gnocchi_api_uwsgi_config).new({})
+    }.to raise_error(Puppet::Error, 'Title or name must be provided')
+  end
+
+  it 'should not expect a name with whitespace' do
+    expect {
+      Puppet::Type.type(:gnocchi_api_uwsgi_config).new(:name => 'f oo')
+    }.to raise_error(Puppet::Error, /Parameter name failed/)
+  end
+
+  it 'should fail when there is no section' do
+    expect {
+      Puppet::Type.type(:gnocchi_api_uwsgi_config).new(:name => 'foo')
+    }.to raise_error(Puppet::Error, /Parameter name failed/)
+  end
+
+  it 'should not require a value when ensure is absent' do
+    Puppet::Type.type(:gnocchi_api_uwsgi_config).new(:name => 'DEFAULT/foo', :ensure => :absent)
+  end
+
+  it 'should accept a valid value' do
+    @gnocchi_api_uwsgi_config[:value] = 'bar'
+    expect(@gnocchi_api_uwsgi_config[:value]).to eq('bar')
+  end
+
+  it 'should not accept a value with whitespace' do
+    @gnocchi_api_uwsgi_config[:value] = 'b ar'
+    expect(@gnocchi_api_uwsgi_config[:value]).to eq('b ar')
+  end
+
+  it 'should accept valid ensure values' do
+    @gnocchi_api_uwsgi_config[:ensure] = :present
+    expect(@gnocchi_api_uwsgi_config[:ensure]).to eq(:present)
+    @gnocchi_api_uwsgi_config[:ensure] = :absent
+    expect(@gnocchi_api_uwsgi_config[:ensure]).to eq(:absent)
+  end
+
+  it 'should not accept invalid ensure values' do
+    expect {
+      @gnocchi_api_uwsgi_config[:ensure] = :latest
+    }.to raise_error(Puppet::Error, /Invalid value/)
+  end
+
+  it 'should autorequire the package that install the file' do
+    catalog = Puppet::Resource::Catalog.new
+    anchor = Puppet::Type.type(:anchor).new(:name => 'gnocchi::install::end')
+    catalog.add_resource anchor, @gnocchi_api_uwsgi_config
+    dependency = @gnocchi_api_uwsgi_config.autorequire
+    expect(dependency.size).to eq(1)
+    expect(dependency[0].target).to eq(@gnocchi_api_uwsgi_config)
+    expect(dependency[0].source).to eq(anchor)
+  end
+
+end