use input instead of attribute

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Test
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  schedule:
+    - cron: '0 6 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby-version: ['2.6', '2.7', '3.0']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake

.rubocop.yml

@@ -1,26 +1,36 @@
 ---
+AllCops:
+  Exclude:
+  - vendor/**/*
 Documentation:
   Enabled: false
-AlignParameters:
-  Enabled: true
-Encoding:
+Layout/ParameterAlignment:
   Enabled: true
 HashSyntax:
   Enabled: true
 LineLength:
   Enabled: false
 EmptyLinesAroundBlockBody:
   Enabled: false
+Style/Encoding:
+  Enabled: false
 MethodLength:
   Max: 40
+NumericLiterals:
+  MinDigits: 10
 Metrics/BlockLength:
-  Max: 30
+  Max: 45 # needed for 6.1.1
 Metrics/CyclomaticComplexity:
   Max: 10
 Metrics/PerceivedComplexity:
   Max: 10
 Metrics/AbcSize:
-  Max: 29
-Style/MethodMissing:
-  Exclude:
-    - 'libraries/process_env_var.rb'
+  Max: 30
+# Lint/AmbiguousBlockAssociation is incompatible with RSpec
+# https://github.com/rubocop-hq/rubocop/issues/4222
+Lint/AmbiguousBlockAssociation:
+  Enabled: false
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+Style/NumericPredicate:
+  Enabled: false

Gemfile

@@ -1,11 +1,18 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
-gem 'highline', '~> 1.6.0'
-gem 'inspec', '~> 3'
-gem 'rack', '>= 1.6.11'
+gem 'highline'
+gem 'rack'
 gem 'rake'
-gem 'rubocop', '~> 0.49.0'
+gem 'rubocop'
 
 group :tools do
-  gem 'github_changelog_generator', '~> 1.12.0'
+  gem 'github_changelog_generator'
+  gem 'pry-coolline'
+end
+
+source 'https://packagecloud.io/cinc-project/stable' do
+  gem 'chef-config'
+  gem 'cinc-auditor-bin'
 end

Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rake/testtask'
 require 'rubocop/rake_task'
 
@@ -17,23 +19,9 @@ task default: [:lint, 'test:check']
 namespace :test do
   # run inspec check to verify that the profile is properly configured
   task :check do
-    dir = File.join(File.dirname(__FILE__))
-    sh("bundle exec inspec check #{dir}")
-  end
-end
-
-# Automatically generate a changelog for this project. Only loaded if
-# the necessary gem is installed. By default its picking up the version from
-# inspec.yml. You can override that behavior with s`rake changelog to=1.2.0`
-begin
-  require 'yaml'
-  metadata = YAML.load_file('inspec.yml')
-  v = ENV['to'] || metadata['version']
-  puts "Generate changelog for version #{v}"
-  require 'github_changelog_generator/task'
-  GitHubChangelogGenerator::RakeTask.new :changelog do |config|
-    config.future_release = v
+    require 'inspec'
+    puts "Checking profile with InSpec Version: #{Inspec::VERSION}"
+    profile = Inspec::Profile.for_target('.', backend: Inspec::Backend.create(Inspec::Config.mock))
+    pp profile.check
   end
-rescue LoadError
-  puts '>>>>> GitHub Changelog Generator not loaded, omitting tasks'
 end

controls/1_1_master_node_configuration_files.rb

@@ -1,14 +1,16 @@
+# frozen_string_literal: true
+
 title '1.1 Master Node: Configuration Files'
 
-apiserver_manifest = attribute('apiserver-manifest')
-controller_manager_manifest = attribute('controller_manager-manifest')
-scheduler_manifest = attribute('scheduler-manifest')
-etcd_manifest = attribute('etcd-manifest')
-etcd_regex = Regexp.new(attribute('etcd'))
-admin_conf = attribute('admin-conf')
-scheduler_conf = attribute('scheduler-conf')
-controller_manager_conf = attribute('controller_manager-conf')
-kubernetes_pki = attribute('kubernetes-pki')
+apiserver_manifest = input('apiserver-manifest')
+controller_manager_manifest = input('controller_manager-manifest')
+scheduler_manifest = input('scheduler-manifest')
+etcd_manifest = input('etcd-manifest')
+etcd_regex = Regexp.new(input('etcd'))
+admin_conf = input('admin-conf')
+scheduler_conf = input('scheduler-conf')
+controller_manager_conf = input('controller_manager-conf')
+kubernetes_pki = input('kubernetes-pki')
 
 control 'cis-kubernetes-benchmark-1.1.1' do
   title 'Ensure that the API server pod specification file permissions are set to 644 or more restrictive'

controls/1_2_master_node_api_server.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 title '1.2 Master Node: API Server'
 
-apiserver = attribute('apiserver')
+apiserver = input('apiserver')
 # fallback if apiserver attribute is not defined
 apiserver = kubernetes.apiserver_bin if apiserver.empty?
 

controls/1_3_master_node_controller_manager.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 title '1.3 Master Node: Controller Manager'
 
-controller_manager = attribute('controller_manager')
+controller_manager = input('controller_manager')
 # fallback if scheduler attribute is not defined
 controller_manager = kubernetes.controllermanager_bin if controller_manager.empty?
 

controls/1_4_master_node_scheduler.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 title '1.4 Master Node: Scheduler'
 
-scheduler = attribute('scheduler')
+scheduler = input('scheduler')
 # fallback if scheduler attribute is not defined
 scheduler = kubernetes.scheduler_bin if scheduler.empty?
 

controls/2_etcd_node.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 title '2 Etcd Node'
 
-etcd_regex = Regexp.new(attribute('etcd'))
+etcd_regex = Regexp.new(input('etcd'))
 etcd_process = processes(etcd_regex)
 etcd_env_vars = process_env_var(etcd_regex)
 

controls/3_1_control_plane_authn_and_authz.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 title '3.1 Control Plane Configuration'
 
 control 'cis-kubernetes-benchmark-3.1.1' do

controls/3_2_control_plane_logging.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 title '3.2 Logging'
 
-apiserver = attribute('apiserver')
+apiserver = input('apiserver')
 # fallback if apiserver attribute is not defined
 apiserver = kubernetes.apiserver_bin if apiserver.empty?
 

controls/4_1_worker_node_configuration_files.rb

@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 title '4.1.1 Worker Node: Configuration Files'
 
-kubelet = attribute('kubelet')
+kubelet = input('kubelet')
 # fallback if kubelet attribute is not defined
 kubelet = kubernetes.kubelet_bin if kubelet.empty?
-kubelet_conf = attribute('kubelet-conf')
+kubelet_conf = input('kubelet-conf')
 
 only_if('kubelet not found') do
   processes(kubelet).exists?

controls/4_2_worker_node_kubelet.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 title '4.2 Worker Node: Kubelet'
 
-kubelet = attribute('kubelet')
+kubelet = input('kubelet')
 # fallback if kubelet attribute is not defined
 kubelet = kubernetes.kubelet_bin if kubelet.empty?
 

controls/5_1_policies_rbac_and_service_accounts.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 title '5.1 Policies: RBAC and Service Accounts'
 
 control 'cis-kubernetes-benchmark-5.1.1' do

controls/5_2_policies_pod_security_policies.rb

@@ -1,4 +1,6 @@
-cis_level = attribute('cis_level')
+# frozen_string_literal: true
+
+cis_level = input('cis_level')
 
 title '5.2 Policies: Pod Security Policies'
 

controls/5_3_policies_network_policies_and_cni.rb

@@ -1,4 +1,6 @@
-cis_level = attribute('cis_level')
+# frozen_string_literal: true
+
+cis_level = input('cis_level')
 
 title '5.3 Policies: Network Policies and CNI'
 

controls/5_4_policies_secrets_management.rb

@@ -1,4 +1,6 @@
-cis_level = attribute('cis_level')
+# frozen_string_literal: true
+
+cis_level = input('cis_level')
 
 title '5.4 Policies: Secrets Management'
 

controls/5_5_policies_extensible_admission_control.rb

@@ -1,4 +1,6 @@
-cis_level = attribute('cis_level')
+# frozen_string_literal: true
+
+cis_level = input('cis_level')
 
 title '5.5 Policies: Extensible Admission Control'
 

controls/5_6_policies_general_policies.rb

@@ -1,4 +1,6 @@
-cis_level = attribute('cis_level')
+# frozen_string_literal: true
+
+cis_level = input('cis_level')
 
 title '5.6 Policies: General Policies'
 

inspec.yml

@@ -7,7 +7,7 @@ copyright_email: kvlaardingerbroek@schubergphilis.com
 license: Apache-2.0
 summary: An InSpec Compliance profile for the CIS Kubernetes Benchmark
 version: 1.0.2
-inspec_version: '>= 2.3.5'
+inspec_version: '>= 4.6.3'
 supports:
     - platform-family: unix
 attributes:

libraries/kubernetes.rb

@@ -1,8 +1,11 @@
+# frozen_string_literal: true
+
 class Kubernetes < Inspec.resource(1)
   name 'kubernetes'
   desc 'Custom resource which abstracts the various kubernetes runtimes like hyperkube'
 
   def initialize
+    super
     @is_hyperkube = inspec.file('/usr/bin/hyperkube').file?
     Log.debug("The kubernetes installation uses hyperkube: #{@is_hyperkube}")
   end

libraries/process_env_var.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ProcessEnvVar < Inspec.resource(1)
   name 'process_env_var'
   desc 'Custom resource to lookup environment variables for a process'
@@ -7,15 +9,23 @@ class ProcessEnvVar < Inspec.resource(1)
     end
   "
 
+  # As described here https://github.com/inspec/inspec/blob/main/lib/inspec/resource.rb#L111
+  # Inspec has a weird behaviour concerning super
+  # rubocop:disable Lint/MissingSuper
   def initialize(process)
     @process = inspec.processes(process)
   end
+  # rubocop:enable Lint/MissingSuper
+
+  def respond_to_missing?(name)
+    Log.debug("Missing #{name}")
+  end
 
   def method_missing(name)
     read_params[name.to_s] || ''
   end
 
-  def read_params
+  def params
     return @params if defined?(@params)
 
     @file = inspec.file("/proc/#{@process.pids.first}/environ")