diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 000000000..9f960493c
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,5 @@
+inherit_from: .rubocop_todo.yml
+
+inherit_gem:
+  rubocop-rails_config:
+    - config/rails.yml
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 000000000..d16245ec4
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,357 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2018-08-27 17:05:32 +0200 using RuboCop version 0.58.2.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 13
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, IndentOneStep, IndentationWidth.
+# SupportedStyles: case, end
+Layout/CaseIndentation:
+  Exclude:
+    - 'lib/puppet/report_sanitizer.rb'
+    - 'lib/report_transformer.rb'
+    - 'lib/tasks/summarize_reports.rake'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Layout/ElseAlignment:
+  Exclude:
+    - 'lib/node_group_graph.rb'
+
+# Offense count: 39
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, no_empty_lines
+Layout/EmptyLinesAroundBlockBody:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, empty_lines_except_namespace, empty_lines_special, no_empty_lines, beginning_only, ending_only
+Layout/EmptyLinesAroundClassBody:
+  Exclude:
+    - 'app/controllers/application_controller.rb'
+    - 'app/controllers/node_class_memberships_controller.rb'
+    - 'app/controllers/node_group_class_memberships_controller.rb'
+    - 'app/controllers/nodes_controller.rb'
+    - 'app/controllers/pages_controller.rb'
+    - 'app/controllers/reports_controller.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Layout/EmptyLinesAroundMethodBody:
+  Exclude:
+    - 'app/helpers/conflict_analyzer.rb'
+    - 'lib/has_parameters.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, empty_lines_except_namespace, empty_lines_special, no_empty_lines
+Layout/EmptyLinesAroundModuleBody:
+  Exclude:
+    - 'app/helpers/conflict_html.rb'
+    - 'app/helpers/nodes_helper.rb'
+    - 'lib/puppet/report_sanitizer.rb'
+    - 'spec/support/describe_reports.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleAlignWith, AutoCorrect, Severity.
+# SupportedStylesAlignWith: keyword, variable, start_of_line
+Layout/EndAlignment:
+  Exclude:
+    - 'config/initializers/01_serialize_flash_as_hash.rb'
+    - 'lib/node_group_graph.rb'
+    - 'lib/report_transformer.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: normal, rails
+Layout/IndentationConsistency:
+  Exclude:
+    - 'spec/helpers/application_helper_spec.rb'
+    - 'spec/lib/puppet/report_sanitizer_spec.rb'
+
+# Offense count: 22
+# Cop supports --auto-correct.
+# Configuration parameters: Width, IgnoredPatterns.
+Layout/IndentationWidth:
+  Enabled: false
+
+# Offense count: 17
+# Cop supports --auto-correct.
+Layout/LeadingCommentSpace:
+  Exclude:
+    - 'config/initializers/safe_yaml.rb'
+    - 'lib/node_group_graph.rb'
+    - 'lib/tasks/classesgroups.rake'
+    - 'spec/helpers/pages_helper_spec.rb'
+    - 'spec/helpers/status_helper_spec.rb'
+    - 'spec/models/report_spec.rb'
+    - 'spec/spec_helper.rb'
+
+# Offense count: 96
+# Cop supports --auto-correct.
+Layout/SpaceAfterComma:
+  Enabled: false
+
+# Offense count: 19
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, no_space
+Layout/SpaceAroundEqualsInParameterDefault:
+  Exclude:
+    - 'app/helpers/application_helper.rb'
+    - 'app/helpers/paginate_scope_helper.rb'
+    - 'app/models/node.rb'
+    - 'app/models/status.rb'
+    - 'lib/data_generator.rb'
+    - 'lib/has_parameters.rb'
+    - 'lib/node_group_graph.rb'
+    - 'spec/support/report_support.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+Layout/SpaceAroundKeyword:
+  Exclude:
+    - 'app/controllers/node_groups_controller.rb'
+    - 'app/controllers/nodes_controller.rb'
+    - 'app/helpers/conflict_html.rb'
+
+# Offense count: 77
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment.
+Layout/SpaceAroundOperators:
+  Exclude:
+    - 'app/helpers/application_helper.rb'
+    - 'app/models/metric.rb'
+    - 'app/models/status.rb'
+    - 'lib/data_generator.rb'
+    - 'lib/node_group_graph.rb'
+    - 'lib/progress_bar.rb'
+    - 'spec/controllers/node_groups_controller_spec.rb'
+    - 'spec/controllers/nodes_controller_spec.rb'
+    - 'spec/factories.rb'
+    - 'spec/lib/puppet/report_sanitizer_spec.rb'
+    - 'spec/lib/report_transformer_spec.rb'
+    - 'spec/models/report_spec.rb'
+    - 'spec/models/resource_status_spec.rb'
+
+# Offense count: 55
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceBeforeBlockBraces:
+  Enabled: false
+
+# Offense count: 266
+# Cop supports --auto-correct.
+Layout/SpaceBeforeComma:
+  Exclude:
+    - 'app/helpers/application_helper.rb'
+    - 'spec/models/report_spec.rb'
+
+# Offense count: 217
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces, SpaceBeforeBlockParameters.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideBlockBraces:
+  Enabled: false
+
+# Offense count: 199
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space, compact
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideHashLiteralBraces:
+  Enabled: false
+
+# Offense count: 34
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, no_space
+Layout/SpaceInsideParens:
+  Exclude:
+    - 'app/helpers/conflict_html.rb'
+    - 'app/helpers/paginate_scope_helper.rb'
+    - 'app/helpers/reports_helper.rb'
+    - 'app/models/report.rb'
+    - 'config/initializers/check_migration_version.rb'
+    - 'lib/registry.rb'
+    - 'lib/tasks/install.rake'
+    - 'spec/controllers/nodes_controller_spec.rb'
+    - 'spec/helpers/application_helper_spec.rb'
+    - 'spec/models/report_spec.rb'
+
+# Offense count: 12
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: final_newline, final_blank_line
+Layout/TrailingBlankLines:
+  Exclude:
+    - 'app/helpers/conflict_html.rb'
+    - 'config/initializers/check_migration_version.rb'
+    - 'config/initializers/time_formats.rb'
+    - 'lib/progress_bar.rb'
+    - 'lib/tasks/rake_helpers.rb'
+    - 'lib/tasks/schematize_reports.rake'
+    - 'lib/tasks/update_report_data.rake'
+    - 'spec/lib/settings_spec.rb'
+    - 'spec/models/resource_status_spec.rb'
+    - 'spec/shared_behaviors/controller_mixins.rb'
+    - 'spec/shared_behaviors/controller_search.rb'
+    - 'spec/support/should_matchers.rb'
+
+# Offense count: 12
+# Cop supports --auto-correct.
+# Configuration parameters: AllowInHeredoc.
+Layout/TrailingWhitespace:
+  Exclude:
+    - 'app/helpers/conflict_analyzer.rb'
+    - 'config/initializers/check_migration_version.rb'
+    - 'lib/node_group_graph.rb'
+    - 'lib/tasks/install.rake'
+    - 'spec/shared_behaviors/restful_routing_behavior.rb'
+
+# Offense count: 25
+# Cop supports --auto-correct.
+# Configuration parameters: MaxKeyValuePairs.
+Performance/RedundantMerge:
+  Exclude:
+    - 'spec/controllers/node_groups_controller_spec.rb'
+    - 'spec/controllers/nodes_controller_spec.rb'
+
+# Offense count: 28
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, conditionals
+Style/AndOr:
+  Exclude:
+    - 'app/controllers/nodes_controller.rb'
+    - 'app/helpers/reports_helper.rb'
+    - 'app/models/node.rb'
+    - 'app/models/report.rb'
+    - 'config/initializers/check_migration_version.rb'
+    - 'lib/data_generator.rb'
+    - 'lib/find_from_form.rb'
+    - 'lib/node_group_graph.rb'
+    - 'lib/registry.rb'
+    - 'lib/report_transformer.rb'
+    - 'lib/tasks/classesgroups.rake'
+    - 'lib/tasks/import_reports.rake'
+    - 'lib/tasks/install.rake'
+    - 'lib/tasks/node.rake'
+
+# Offense count: 47
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: braces, no_braces, context_dependent
+Style/BracesAroundHashParameters:
+  Exclude:
+    - 'app/helpers/application_helper.rb'
+    - 'app/models/timeline_event.rb'
+    - 'spec/controllers/node_groups_controller_spec.rb'
+    - 'spec/controllers/nodes_controller_spec.rb'
+    - 'spec/helpers/application_helper_spec.rb'
+    - 'spec/views/node_groups/edit.html.haml_spec.rb'
+    - 'spec/views/nodes/edit.html.haml_spec.rb'
+
+# Offense count: 6
+# Cop supports --auto-correct.
+Style/ColonMethodCall:
+  Exclude:
+    - 'app/models/node.rb'
+    - 'lib/tasks/import_reports.rake'
+    - 'lib/tasks/install.rake'
+
+# Offense count: 10
+# Cop supports --auto-correct.
+Style/DefWithParentheses:
+  Exclude:
+    - 'lib/puppet/report_sanitizer.rb'
+
+# Offense count: 194
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: when_needed, always, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+# Offense count: 1199
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, UseHashRocketsWithSymbolValues, PreferHashRocketsForNonAlnumEndingSymbols.
+# SupportedStyles: ruby19, hash_rockets, no_mixed_keys, ruby19_no_mixed_keys
+Style/HashSyntax:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: require_parentheses, require_no_parentheses, require_no_parentheses_except_multiline
+Style/MethodDefParentheses:
+  Exclude:
+    - 'lib/trimmer.rb'
+
+# Offense count: 20
+# Cop supports --auto-correct.
+# Configuration parameters: AllowMultipleReturnValues.
+Style/RedundantReturn:
+  Exclude:
+    - 'app/controllers/files_controller.rb'
+    - 'app/helpers/application_helper.rb'
+    - 'app/models/node.rb'
+    - 'app/models/report.rb'
+    - 'app/models/status.rb'
+    - 'config/initializers/app_version_init.rb'
+    - 'lib/settings_reader.rb'
+    - 'lib/tasks/db_raw.rake'
+    - 'lib/tasks/install.rake'
+    - 'spec/support/from_response_body.rb'
+
+# Offense count: 13
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAsExpressionSeparator.
+Style/Semicolon:
+  Exclude:
+    - 'app/controllers/node_groups_controller.rb'
+    - 'app/controllers/nodes_controller.rb'
+    - 'app/helpers/conflict_analyzer.rb'
+    - 'app/helpers/conflict_html.rb'
+    - 'lib/node_group_graph.rb'
+    - 'lib/progress_bar.rb'
+
+# Offense count: 2052
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiterals:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: ExactNameMatch, AllowPredicates, AllowDSLWriters, IgnoreClassMethods, Whitelist.
+# Whitelist: to_ary, to_a, to_c, to_enum, to_h, to_hash, to_i, to_int, to_io, to_open, to_path, to_proc, to_r, to_regexp, to_str, to_s, to_sym
+Style/TrivialAccessors:
+  Exclude:
+    - 'lib/progress_bar.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/UnneededPercentQ:
+  Exclude:
+    - 'spec/controllers/nodes_controller_spec.rb'
+
+# Offense count: 945
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
+Metrics/LineLength:
+  Max: 275
diff --git a/.travis.yml b/.travis.yml
index 47c2bc35c..25e172e1d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,3 +19,4 @@ before_script:
   - bundle exec rails db:migrate
 script:
   - bundle exec rails spec
+  - bundle exec rubocop
diff --git a/Gemfile b/Gemfile
index d2feb6252..021fdc632 100644
--- a/Gemfile
+++ b/Gemfile
@@ -43,6 +43,7 @@ group :development, :test do
   gem 'listen'
   gem 'simplecov'
   gem 'simplecov-console'
+  gem "rubocop-rails_config"
 end
 
 group :postgresql do
diff --git a/Gemfile.lock b/Gemfile.lock
index 8b9073e30..4fe69b672 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,6 +44,7 @@ GEM
       tzinfo (~> 1.1)
     ansi (1.5.0)
     arel (9.0.0)
+    ast (2.4.0)
     bindex (0.5.0)
     bootsnap (1.3.0)
       msgpack (~> 1.0)
@@ -95,6 +96,7 @@ GEM
       has_scope (~> 0.6)
       railties (>= 4.2, <= 5.2)
       responders
+    jaro_winkler (1.5.1)
     jquery-rails (4.3.3)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
@@ -128,7 +130,11 @@ GEM
     nio4r (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
+    parallel (1.12.1)
+    parser (2.5.1.2)
+      ast (~> 2.4.0)
     pg (1.0.0)
+    powerpack (0.1.2)
     rack (2.0.5)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -160,6 +166,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
+    rainbow (3.0.0)
     rake (12.3.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
@@ -195,6 +202,18 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
+    rubocop (0.58.2)
+      jaro_winkler (~> 1.5.1)
+      parallel (~> 1.10)
+      parser (>= 2.5, != 2.5.1.1)
+      powerpack (~> 0.1)
+      rainbow (>= 2.2.2, < 4.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (~> 1.0, >= 1.0.1)
+    rubocop-rails_config (0.2.3)
+      railties (>= 3.0)
+      rubocop (~> 0.56)
+    ruby-progressbar (1.10.0)
     ruby_dep (1.5.0)
     ruby_parser (3.11.0)
       sexp_processor (~> 4.9)
@@ -246,6 +265,7 @@ GEM
       thread_safe (~> 0.1)
     uglifier (4.1.10)
       execjs (>= 0.3.0, < 3)
+    unicode-display_width (1.4.0)
     web-console (3.6.2)
       actionview (>= 5.0)
       activemodel (>= 5.0)
@@ -286,6 +306,7 @@ DEPENDENCIES
   rspec-collection_matchers
   rspec-html-matchers
   rspec-rails
+  rubocop-rails_config
   safe_yaml
   sass-rails
   shoulda-matchers
@@ -300,4 +321,4 @@ DEPENDENCIES
   will_paginate
 
 BUNDLED WITH
-   1.16.0
+   1.16.2