diff --git a/CHANGELOG b/CHANGELOG
index 3a75f50e9a2..22012211164 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -14,6 +14,7 @@ v 8.2.0 (unreleased)
   - Use git follow flag for commits page when retrieve history for file or directory
   - Show merge request CI status on merge requests index page
   - Extend yml syntax for only and except to support specifying repository path
+  - Enable shared runners to all new projects
   - Fix: 500 error returned if destroy request without HTTP referer (Kazuki Shimizu)
   - Remove deprecated CI events from project settings page
   - Use issue editor as cross reference comment author when issue is edited with a new mention.
diff --git a/app/controllers/admin/application_settings_controller.rb b/app/controllers/admin/application_settings_controller.rb
index 039f18f23e0..3d9c59050ff 100644
--- a/app/controllers/admin/application_settings_controller.rb
+++ b/app/controllers/admin/application_settings_controller.rb
@@ -57,6 +57,7 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
       :version_check_enabled,
       :admin_notification_email,
       :user_oauth_applications,
+      :shared_runners_enabled,
       restricted_visibility_levels: [],
       import_sources: []
     )
diff --git a/app/models/application_setting.rb b/app/models/application_setting.rb
index 05430c2ee18..266045f7afa 100644
--- a/app/models/application_setting.rb
+++ b/app/models/application_setting.rb
@@ -87,7 +87,8 @@ class ApplicationSetting < ActiveRecord::Base
       default_project_visibility: Settings.gitlab.default_projects_features['visibility_level'],
       default_snippet_visibility: Settings.gitlab.default_projects_features['visibility_level'],
       restricted_signup_domains: Settings.gitlab['restricted_signup_domains'],
-      import_sources: ['github','bitbucket','gitlab','gitorious','google_code','fogbugz','git']
+      import_sources: ['github','bitbucket','gitlab','gitorious','google_code','fogbugz','git'],
+      shared_runners_enabled: Settings.gitlab_ci['shared_runners_enabled'],
     )
   end
 
diff --git a/app/models/project.rb b/app/models/project.rb
index 74b89aad499..57db7f9f0a4 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -37,6 +37,7 @@ class Project < ActiveRecord::Base
   include Gitlab::ConfigHelper
   include Gitlab::ShellAdapter
   include Gitlab::VisibilityLevel
+  include Gitlab::CurrentSettings
   include Referable
   include Sortable
   include AfterCommitQueue
@@ -775,7 +776,9 @@ class Project < ActiveRecord::Base
   end
 
   def ensure_gitlab_ci_project
-    gitlab_ci_project || create_gitlab_ci_project
+    gitlab_ci_project || create_gitlab_ci_project(
+      shared_runners_enabled: current_application_settings.shared_runners_enabled
+    )
   end
 
   def enable_ci
diff --git a/app/views/admin/application_settings/_form.html.haml b/app/views/admin/application_settings/_form.html.haml
index 7a78526e09a..7253218c2e9 100644
--- a/app/views/admin/application_settings/_form.html.haml
+++ b/app/views/admin/application_settings/_form.html.haml
@@ -130,5 +130,14 @@
         = f.text_area :help_page_text, class: 'form-control', rows: 4
         .help-block Markdown enabled
 
+  %fieldset
+    %legend Continuous Integration
+    .form-group
+      .col-sm-offset-2.col-sm-10
+        .checkbox
+          = f.label :shared_runners_enabled do
+            = f.check_box :shared_runners_enabled
+            Enable shared runners for a new projects
+
   .form-actions
     = f.submit 'Save', class: 'btn btn-primary'
diff --git a/config/initializers/1_settings.rb b/config/initializers/1_settings.rb
index c189c88bdcb..64d73d7232d 100644
--- a/config/initializers/1_settings.rb
+++ b/config/initializers/1_settings.rb
@@ -181,10 +181,11 @@ Settings.gitlab['import_sources'] ||= ['github','bitbucket','gitlab','gitorious'
 # CI
 #
 Settings['gitlab_ci'] ||= Settingslogic.new({})
-Settings.gitlab_ci['all_broken_builds']   = true if Settings.gitlab_ci['all_broken_builds'].nil?
-Settings.gitlab_ci['add_pusher']          = false if Settings.gitlab_ci['add_pusher'].nil?
-Settings.gitlab_ci['url']                 ||= Settings.send(:build_gitlab_ci_url)
-Settings.gitlab_ci['builds_path']         = File.expand_path(Settings.gitlab_ci['builds_path'] || "builds/", Rails.root)
+Settings.gitlab_ci['shared_runners_enabled'] = true if Settings.gitlab_ci['shared_runners_enabled'].nil?
+Settings.gitlab_ci['all_broken_builds']     = true if Settings.gitlab_ci['all_broken_builds'].nil?
+Settings.gitlab_ci['add_pusher']            = false if Settings.gitlab_ci['add_pusher'].nil?
+Settings.gitlab_ci['url']                   ||= Settings.send(:build_gitlab_ci_url)
+Settings.gitlab_ci['builds_path']           = File.expand_path(Settings.gitlab_ci['builds_path'] || "builds/", Rails.root)
 
 #
 # Reply by email
diff --git a/db/migrate/20151103133339_add_shared_runners_setting.rb b/db/migrate/20151103133339_add_shared_runners_setting.rb
new file mode 100644
index 00000000000..4231dfd5c2e
--- /dev/null
+++ b/db/migrate/20151103133339_add_shared_runners_setting.rb
@@ -0,0 +1,5 @@
+class AddSharedRunnersSetting < ActiveRecord::Migration
+  def up
+    add_column :application_settings, :shared_runners_enabled, :boolean, default: true, null: false
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 17d445a8baa..de896f2764b 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20151103001141) do
+ActiveRecord::Schema.define(version: 20151103133339) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -47,6 +47,7 @@ ActiveRecord::Schema.define(version: 20151103001141) do
     t.text     "import_sources"
     t.text     "help_page_text"
     t.string   "admin_notification_email"
+    t.boolean  "shared_runners_enabled",       default: true,  null: false
   end
 
   create_table "audit_events", force: true do |t|
diff --git a/lib/gitlab/current_settings.rb b/lib/gitlab/current_settings.rb
index 0ea1b6a2f6f..cd84afa31d5 100644
--- a/lib/gitlab/current_settings.rb
+++ b/lib/gitlab/current_settings.rb
@@ -23,7 +23,8 @@ module Gitlab
         restricted_visibility_levels: Settings.gitlab['restricted_visibility_levels'],
         max_attachment_size: Settings.gitlab['max_attachment_size'],
         session_expire_delay: Settings.gitlab['session_expire_delay'],
-        import_sources: Settings.gitlab['import_sources']
+        import_sources: Settings.gitlab['import_sources'],
+        shared_runners_enabled: Settings.gitlab_ci['shared_runners_enabled'],
       )
     end
 
diff --git a/spec/factories/ci/projects.rb b/spec/factories/ci/projects.rb
index 111e1a82816..1183a190353 100644
--- a/spec/factories/ci/projects.rb
+++ b/spec/factories/ci/projects.rb
@@ -33,6 +33,8 @@ FactoryGirl.define do
 
     gl_project factory: :empty_project
 
+    shared_runners_enabled false
+
     factory :ci_project do
       token 'iPWx6WM4lhHNedGfBpPJNP'
     end
diff --git a/spec/models/application_setting_spec.rb b/spec/models/application_setting_spec.rb
index de0b2ef4cda..f01fe8bd398 100644
--- a/spec/models/application_setting_spec.rb
+++ b/spec/models/application_setting_spec.rb
@@ -28,11 +28,11 @@
 require 'spec_helper'
 
 describe ApplicationSetting, models: true do
-  it { expect(ApplicationSetting.create_from_defaults).to be_valid }
+  let(:setting) { ApplicationSetting.create_from_defaults }
+
+  it { expect(setting).to be_valid }
 
   context 'restricted signup domains' do
-    let(:setting) { ApplicationSetting.create_from_defaults }
-
     it 'set single domain' do
       setting.restricted_signup_domains_raw = 'example.com'
       expect(setting.restricted_signup_domains).to eq(['example.com'])
@@ -53,4 +53,26 @@ describe ApplicationSetting, models: true do
       expect(setting.restricted_signup_domains).to eq(['example.com', '*.example.com'])
     end
   end
+
+  context 'shared runners' do
+    let(:gl_project) { create(:empty_project) }
+
+    before do
+      allow_any_instance_of(Project).to receive(:current_application_settings).and_return(setting)
+    end
+
+    subject { gl_project.ensure_gitlab_ci_project.shared_runners_enabled }
+
+    context 'enabled' do
+      before { setting.update_attributes(shared_runners_enabled: true) }
+
+      it { is_expected.to be_truthy }
+    end
+
+    context 'disabled' do
+      before { setting.update_attributes(shared_runners_enabled: false) }
+
+      it { is_expected.to be_falsey }
+    end
+  end
 end
diff --git a/spec/services/ci/register_build_service_spec.rb b/spec/services/ci/register_build_service_spec.rb
index 781764627ac..b370dfbe113 100644
--- a/spec/services/ci/register_build_service_spec.rb
+++ b/spec/services/ci/register_build_service_spec.rb
@@ -70,6 +70,10 @@ module Ci
       end
 
       context 'disallow shared runners' do
+        before do
+          gl_project.gitlab_ci_project.update(shared_runners_enabled: false)
+        end
+
         context 'shared runner' do
           let(:build) { service.execute(shared_runner) }