Add latest changes from gitlab-org/gitlab@master

76 files changed, 1091 insertions, 243 deletions

diff --git a/app/assets/javascripts/monitoring/components/dashboard.vue b/app/assets/javascripts/monitoring/components/dashboard.vue
index 823ea9e1641..c08b471bd51 100644
--- a/app/assets/javascripts/monitoring/components/dashboard.vue
+++ b/app/assets/javascripts/monitoring/components/dashboard.vue
@@ -11,18 +11,19 @@ import {
   GlModalDirective,
   GlTooltipDirective,
 } from '@gitlab/ui';
+import PanelType from 'ee_else_ce/monitoring/components/panel_type.vue';
 import { s__ } from '~/locale';
 import createFlash from '~/flash';
 import Icon from '~/vue_shared/components/icon.vue';
 import { getParameterValues, mergeUrlParams, redirectTo } from '~/lib/utils/url_utility';
 import invalidUrl from '~/lib/utils/invalid_url';
-import PanelType from 'ee_else_ce/monitoring/components/panel_type.vue';
 import DateTimePicker from './date_time_picker/date_time_picker.vue';
 import MonitorTimeSeriesChart from './charts/time_series.vue';
 import MonitorSingleStatChart from './charts/single_stat.vue';
 import GraphGroup from './graph_group.vue';
 import EmptyState from './empty_state.vue';
-import { getTimeDiff, isValidDate } from '../utils';
+import TrackEventDirective from '~/vue_shared/directives/track_event';
+import { getTimeDiff, isValidDate, getAddMetricTrackingOptions } from '../utils';
 
 export default {
   components: {
@@ -43,6 +44,7 @@ export default {
   directives: {
     GlModal: GlModalDirective,
     GlTooltip: GlTooltipDirective,
+    TrackEvent: TrackEventDirective,
   },
   props: {
     externalDashboardUrl: {
@@ -298,6 +300,7 @@ export default {
     onDateTimePickerApply(timeWindowUrlParams) {
       return redirectTo(mergeUrlParams(timeWindowUrlParams, window.location.href));
     },
+    getAddMetricTrackingOptions,
   },
   addMetric: {
     title: s__('Metrics|Add metric'),
@@ -389,9 +392,10 @@ export default {
             </gl-button>
             <gl-button
               v-if="addingMetricsAvailable"
+              ref="addMetricBtn"
               v-gl-modal="$options.addMetric.modalId"
               variant="outline-success"
-              class="mr-2 mt-1 js-add-metric-button"
+              class="mr-2 mt-1"
             >
               {{ $options.addMetric.title }}
             </gl-button>
@@ -411,6 +415,8 @@ export default {
               <div slot="modal-footer">
                 <gl-button @click="hideAddMetricModal">{{ __('Cancel') }}</gl-button>
                 <gl-button
+                  ref="submitCustomMetricsFormBtn"
+                  v-track-event="getAddMetricTrackingOptions()"
                   :disabled="!formIsValid"
                   variant="success"
                   @click="submitCustomMetricsForm"
diff --git a/app/assets/javascripts/monitoring/utils.js b/app/assets/javascripts/monitoring/utils.js
index 336f81aeeff..c824d6d4ddb 100644
--- a/app/assets/javascripts/monitoring/utils.js
+++ b/app/assets/javascripts/monitoring/utils.js
@@ -115,6 +115,7 @@ export const generateLinkToChartOptions = chartLink => {
 /**
  * Tracks snowplow event when user downloads CSV of cluster metric
  * @param {String}  chart title that will be sent as a property for the event
+ * @return {Object} config object for event tracking
  */
 export const downloadCSVOptions = title => {
   const isCLusterHealthBoard = isClusterHealthBoard();
@@ -130,6 +131,18 @@ export const downloadCSVOptions = title => {
 };
 
 /**
+ * Generate options for snowplow to track adding a new metric via the dashboard
+ * custom metric modal
+ * @return {Object} config object for event tracking
+ */
+export const getAddMetricTrackingOptions = () => ({
+  category: document.body.dataset.page,
+  action: 'click_button',
+  label: 'add_new_metric',
+  property: 'modal',
+});
+
+/**
  * This function validates the graph data contains exactly 3 metrics plus
  * value validations from graphDataValidatorForValues.
  * @param {Object} isValues
diff --git a/app/assets/stylesheets/pages/tree.scss b/app/assets/stylesheets/pages/tree.scss
index 6e7081aa4ec..79ad0bd7735 100644
--- a/app/assets/stylesheets/pages/tree.scss
+++ b/app/assets/stylesheets/pages/tree.scss
@@ -15,7 +15,6 @@
       }
 
       .tree-controls {
-        display: flex;
         text-align: right;
 
         .btn {
diff --git a/app/controllers/projects/error_tracking_controller.rb b/app/controllers/projects/error_tracking_controller.rb
index 78d3854e72d..56a66dd38db 100644
--- a/app/controllers/projects/error_tracking_controller.rb
+++ b/app/controllers/projects/error_tracking_controller.rb
@@ -55,6 +55,7 @@ class Projects::ErrorTrackingController < Projects::ApplicationController
 
     render json: {
       errors: serialize_errors(result[:issues]),
+      pagination: result[:pagination],
       external_url: service.external_url
     }
   end
@@ -111,7 +112,7 @@ class Projects::ErrorTrackingController < Projects::ApplicationController
   end
 
   def list_issues_params
-    params.permit([:search_term, :sort])
+    params.permit(:search_term, :sort, :cursor)
   end
 
   def list_projects_params
diff --git a/app/helpers/application_settings_helper.rb b/app/helpers/application_settings_helper.rb
index a011209375e..d9416cb10c4 100644
--- a/app/helpers/application_settings_helper.rb
+++ b/app/helpers/application_settings_helper.rb
@@ -301,7 +301,8 @@ module ApplicationSettingsHelper
       :snowplow_iglu_registry_url,
       :push_event_hooks_limit,
       :push_event_activities_limit,
-      :custom_http_clone_url_root
+      :custom_http_clone_url_root,
+      :snippet_size_limit
     ]
   end
 
diff --git a/app/models/application_setting.rb b/app/models/application_setting.rb
index c681d941e35..4ba0317b580 100644
--- a/app/models/application_setting.rb
+++ b/app/models/application_setting.rb
@@ -226,6 +226,8 @@ class ApplicationSetting < ApplicationRecord
   validates :push_event_activities_limit,
             numericality: { greater_than_or_equal_to: 0 }
 
+  validates :snippet_size_limit, numericality: { only_integer: true, greater_than: 0 }
+
   SUPPORTED_KEY_TYPES.each do |type|
     validates :"#{type}_key_restriction", presence: true, key_restriction: { type: type }
   end
diff --git a/app/models/application_setting_implementation.rb b/app/models/application_setting_implementation.rb
index 7bb89f0d1e2..e1eb8d429bb 100644
--- a/app/models/application_setting_implementation.rb
+++ b/app/models/application_setting_implementation.rb
@@ -26,7 +26,8 @@ module ApplicationSettingImplementation
     '/users',
     '/users/confirmation',
     '/unsubscribes/',
-    '/import/github/personal_access_token'
+    '/import/github/personal_access_token',
+    '/admin/session'
   ].freeze
 
   class_methods do
@@ -139,7 +140,8 @@ module ApplicationSettingImplementation
         snowplow_app_id: nil,
         snowplow_iglu_registry_url: nil,
         custom_http_clone_url_root: nil,
-        productivity_analytics_start_date: Time.now
+        productivity_analytics_start_date: Time.now,
+        snippet_size_limit: 50.megabytes
       }
     end
 
diff --git a/app/models/error_tracking/project_error_tracking_setting.rb b/app/models/error_tracking/project_error_tracking_setting.rb
index 5b5c1b1b56b..3af14d7eef2 100644
--- a/app/models/error_tracking/project_error_tracking_setting.rb
+++ b/app/models/error_tracking/project_error_tracking_setting.rb
@@ -104,7 +104,7 @@ module ErrorTracking
     def calculate_reactive_cache(request, opts)
       case request
       when 'list_issues'
-        { issues: sentry_client.list_issues(**opts.symbolize_keys) }
+        sentry_client.list_issues(**opts.symbolize_keys)
       when 'issue_details'
         {
           issue: sentry_client.issue_details(**opts.symbolize_keys)
diff --git a/app/models/project.rb b/app/models/project.rb
index b452f05c590..e3e10d17cc0 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -170,6 +170,7 @@ class Project < ApplicationRecord
   has_one :microsoft_teams_service
   has_one :packagist_service
   has_one :hangouts_chat_service
+  has_one :unify_circuit_service
 
   has_one :root_of_fork_network,
           foreign_key: 'root_project_id',
diff --git a/app/models/project_services/unify_circuit_service.rb b/app/models/project_services/unify_circuit_service.rb
new file mode 100644
index 00000000000..06f2d10f83b
--- /dev/null
+++ b/app/models/project_services/unify_circuit_service.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+class UnifyCircuitService < ChatNotificationService
+  def title
+    'Unify Circuit'
+  end
+
+  def description
+    'Receive event notifications in Unify Circuit'
+  end
+
+  def self.to_param
+    'unify_circuit'
+  end
+
+  def help
+    'This service sends notifications about projects events to a Unify Circuit conversation.<br />
+    To set up this service:
+    <ol>
+      <li><a href="https://www.circuit.com/unifyportalfaqdetail?articleId=164448">Set up an incoming webhook for your conversation</a>. All notifications will come to this conversation.</li>
+      <li>Paste the <strong>Webhook URL</strong> into the field below.</li>
+      <li>Select events below to enable notifications.</li>
+    </ol>'
+  end
+
+  def event_field(event)
+  end
+
+  def default_channel_placeholder
+  end
+
+  def self.supported_events
+    %w[push issue confidential_issue merge_request note confidential_note tag_push
+       pipeline wiki_page]
+  end
+
+  def default_fields
+    [
+      { type: 'text', name: 'webhook', placeholder: "e.g. https://circuit.com/rest/v2/webhooks/incoming/…", required: true },
+      { type: 'checkbox', name: 'notify_only_broken_pipelines' },
+      { type: 'select', name: 'branches_to_be_notified', choices: BRANCH_CHOICES }
+    ]
+  end
+
+  private
+
+  def notify(message, opts)
+    response = Gitlab::HTTP.post(webhook, body: {
+      subject: message.project_name,
+      text: message.pretext,
+      markdown: true
+    }.to_json)
+
+    response if response.success?
+  end
+
+  def custom_data(data)
+    super(data).merge(markdown: true)
+  end
+end
diff --git a/app/models/service.rb b/app/models/service.rb
index 08936f7fcbd..95b7c6927cf 100644
--- a/app/models/service.rb
+++ b/app/models/service.rb
@@ -289,6 +289,7 @@ class Service < ApplicationRecord
       slack
       teamcity
       microsoft_teams
+      unify_circuit
     ]
 
     if Rails.env.development?
diff --git a/app/models/snippet.rb b/app/models/snippet.rb
index 51ab94e6f4a..b802ea2fd59 100644
--- a/app/models/snippet.rb
+++ b/app/models/snippet.rb
@@ -46,6 +46,18 @@ class Snippet < ApplicationRecord
     length: { maximum: 255 }
 
   validates :content, presence: true
+  validates :content,
+            length: {
+              maximum: ->(_) { Gitlab::CurrentSettings.snippet_size_limit },
+              message: -> (_, data) do
+                current_value = ActiveSupport::NumberHelper.number_to_human_size(data[:value].size)
+                max_size = ActiveSupport::NumberHelper.number_to_human_size(Gitlab::CurrentSettings.snippet_size_limit)
+
+                _("is too long (%{current_value}). The maximum size is %{max_size}.") % { current_value: current_value, max_size: max_size }
+              end
+            },
+            if: :content_changed?
+
   validates :visibility_level, inclusion: { in: Gitlab::VisibilityLevel.values }
 
   # Scopes
diff --git a/app/services/error_tracking/list_issues_service.rb b/app/services/error_tracking/list_issues_service.rb
index a2c8e6e6619..132e9dfa7bd 100644
--- a/app/services/error_tracking/list_issues_service.rb
+++ b/app/services/error_tracking/list_issues_service.rb
@@ -6,37 +6,24 @@ module ErrorTracking
     DEFAULT_LIMIT = 20
     DEFAULT_SORT = 'last_seen'
 
-    def execute
-      return error('Error Tracking is not enabled') unless enabled?
-      return error('Access denied', :unauthorized) unless can_read?
-
-      result = project_error_tracking_setting.list_sentry_issues(
-        issue_status: issue_status,
-        limit: limit,
-        search_term: search_term,
-        sort: sort
-      )
-
-      # our results are not yet ready
-      unless result
-        return error('Not ready. Try again later', :no_content)
-      end
-
-      if result[:error].present?
-        return error(result[:error], http_status_for(result[:error_type]))
-      end
-
-      success(issues: result[:issues])
-    end
-
     def external_url
       project_error_tracking_setting&.sentry_external_url
     end
 
     private
 
+    def fetch
+      project_error_tracking_setting.list_sentry_issues(
+        issue_status: issue_status,
+        limit: limit,
+        search_term: params[:search_term].presence,
+        sort: sort,
+        cursor: params[:cursor].presence
+      )
+    end
+
     def parse_response(response)
-      { issues: response[:issues] }
+      response.slice(:issues, :pagination)
     end
 
     def issue_status
@@ -47,18 +34,6 @@ module ErrorTracking
       params[:limit] || DEFAULT_LIMIT
     end
 
-    def search_term
-      params[:search_term].presence
-    end
-
-    def enabled?
-      project_error_tracking_setting&.enabled?
-    end
-
-    def can_read?
-      can?(current_user, :read_sentry_issue, project)
-    end
-
     def sort
       params[:sort] || DEFAULT_SORT
     end
diff --git a/app/views/projects/artifacts/browse.html.haml b/app/views/projects/artifacts/browse.html.haml
index 6a7cb1499c5..7abac2d14e4 100644
--- a/app/views/projects/artifacts/browse.html.haml
+++ b/app/views/projects/artifacts/browse.html.haml
@@ -15,7 +15,7 @@
         %li.breadcrumb-item
           = link_to truncate(title, length: 40), browse_project_job_artifacts_path(@project, @build, path)
 
-    .tree-controls
+    .tree-controls<
       = link_to download_project_job_artifacts_path(@project, @build),
         rel: 'nofollow', download: '', class: 'btn btn-default download' do
         = sprite_icon('download')
diff --git a/app/views/projects/blob/_breadcrumb.html.haml b/app/views/projects/blob/_breadcrumb.html.haml
index a4fb5f6ba88..e611df8df2a 100644
--- a/app/views/projects/blob/_breadcrumb.html.haml
+++ b/app/views/projects/blob/_breadcrumb.html.haml
@@ -17,21 +17,19 @@
           - else
             = link_to title, project_tree_path(@project, tree_join(@ref, path))
 
-  .tree-controls
+  .tree-controls<
     = render 'projects/find_file_link'
+    -# only show normal/blame view links for text files
+    - if blob.readable_text?
+      - if blame
+        = link_to 'Normal view', project_blob_path(@project, @id),
+            class: 'btn'
+      - else
+        = link_to 'Blame', project_blame_path(@project, @id),
+            class: 'btn js-blob-blame-link' unless blob.empty?
 
-    .btn-group{ role: "group" }<
-      -# only show normal/blame view links for text files
-      - if blob.readable_text?
-        - if blame
-          = link_to 'Normal view', project_blob_path(@project, @id),
-              class: 'btn'
-        - else
-          = link_to 'Blame', project_blame_path(@project, @id),
-              class: 'btn js-blob-blame-link' unless blob.empty?
+    = link_to 'History', project_commits_path(@project, @id),
+        class: 'btn'
 
-      = link_to 'History', project_commits_path(@project, @id),
-          class: 'btn'
-
-      = link_to 'Permalink', project_blob_path(@project,
-          tree_join(@commit.sha, @path)), class: 'btn js-data-file-blob-permalink-url'
+    = link_to 'Permalink', project_blob_path(@project,
+        tree_join(@commit.sha, @path)), class: 'btn js-data-file-blob-permalink-url'
diff --git a/app/views/projects/buttons/_dropdown.html.haml b/app/views/projects/buttons/_dropdown.html.haml
index bbe0a2c97fd..f1a7528065a 100644
--- a/app/views/projects/buttons/_dropdown.html.haml
+++ b/app/views/projects/buttons/_dropdown.html.haml
@@ -7,7 +7,7 @@
 - show_menu = can_create_issue || can_create_project_snippet || can_push_code || create_mr_from_new_fork || merge_project
 
 - if show_menu
-  .project-action-button.dropdown.inline
+  .project-action-button.dropdown.inline<
     %a.btn.dropdown-toggle.has-tooltip.qa-create-new-dropdown{ href: '#', title: _('Create new...'), 'data-toggle' => 'dropdown', 'data-container' => 'body', 'aria-label' => _('Create new...'), 'data-display' => 'static' }
       = icon('plus')
       = icon("caret-down")
diff --git a/app/views/projects/commits/show.html.haml b/app/views/projects/commits/show.html.haml
index e155e3758fb..3f1d44a488a 100644
--- a/app/views/projects/commits/show.html.haml
+++ b/app/views/projects/commits/show.html.haml
@@ -13,7 +13,7 @@
 
         %ul.breadcrumb.repo-breadcrumb
           = commits_breadcrumbs
-      .tree-controls.d-none.d-sm-none.d-md-block
+      .tree-controls.d-none.d-sm-none.d-md-block<
         - if @merge_request.present?
           .control
             = link_to _("View open merge request"), project_merge_request_path(@project, @merge_request), class: 'btn'
diff --git a/app/views/projects/tree/_tree_header.html.haml b/app/views/projects/tree/_tree_header.html.haml
index 127734ddfd7..2d987744dfd 100644
--- a/app/views/projects/tree/_tree_header.html.haml
+++ b/app/views/projects/tree/_tree_header.html.haml
@@ -75,7 +75,7 @@
                     = link_to new_project_tag_path(@project) do
                       #{ _('New tag') }
 
-.tree-controls
+.tree-controls<
   = render_if_exists 'projects/tree/lock_link'
   - if vue_file_list_enabled?
     #js-tree-history-link.d-inline-block{ data: { history_link: project_commits_path(@project, @ref) } }
@@ -85,20 +85,19 @@
   = render 'projects/find_file_link'
 
   - if can_create_mr_from_fork
-    = succeed " " do
-      - if can_collaborate || current_user&.already_forked?(@project)
-        - if vue_file_list_enabled?
-          #js-tree-web-ide-link.d-inline-block
-        - else
-          = link_to ide_edit_path(@project, @ref, @path), class: 'btn btn-default qa-web-ide-button' do
-            = _('Web IDE')
+    - if can_collaborate || current_user&.already_forked?(@project)
+      - if vue_file_list_enabled?
+        #js-tree-web-ide-link.d-inline-block
       - else
-        = link_to '#modal-confirm-fork', class: 'btn btn-default qa-web-ide-button', data: { target: '#modal-confirm-fork', toggle: 'modal'} do
+        = link_to ide_edit_path(@project, @ref, @path), class: 'btn btn-default qa-web-ide-button' do
           = _('Web IDE')
-        = render 'shared/confirm_fork_modal', fork_path: ide_fork_and_edit_path(@project, @ref, @path)
+    - else
+      = link_to '#modal-confirm-fork', class: 'btn btn-default qa-web-ide-button', data: { target: '#modal-confirm-fork', toggle: 'modal'} do
+        = _('Web IDE')
+      = render 'shared/confirm_fork_modal', fork_path: ide_fork_and_edit_path(@project, @ref, @path)
 
   - if show_xcode_link?(@project)
-    .project-action-button.project-xcode.inline
+    .project-action-button.project-xcode.inline<
       = render "projects/buttons/xcode_link"
 
   = render 'projects/buttons/download', project: @project, ref: @ref
diff --git a/changelogs/unreleased/36955-snowplow-custom-events-for-monitor-apm-add-metric-button-fe.yml b/changelogs/unreleased/36955-snowplow-custom-events-for-monitor-apm-add-metric-button-fe.yml
new file mode 100644
index 00000000000..738f3007214
--- /dev/null
+++ b/changelogs/unreleased/36955-snowplow-custom-events-for-monitor-apm-add-metric-button-fe.yml
@@ -0,0 +1,5 @@
+---
+title: Track adding metric via monitoring dashboard
+merge_request: 20818
+author:
+type: added
diff --git a/changelogs/unreleased/37680-tree-control-buttons-misbehave-on-small-viewports.yml b/changelogs/unreleased/37680-tree-control-buttons-misbehave-on-small-viewports.yml
new file mode 100644
index 00000000000..58e63e127f9
--- /dev/null
+++ b/changelogs/unreleased/37680-tree-control-buttons-misbehave-on-small-viewports.yml
@@ -0,0 +1,5 @@
+---
+title: Remove whitespaces between tree-controls elements
+merge_request: 20952
+author:
+type: other
diff --git a/changelogs/unreleased/chore-admin-mode-rack-attack-default-paths-migration.yml b/changelogs/unreleased/chore-admin-mode-rack-attack-default-paths-migration.yml
new file mode 100644
index 00000000000..20486c3bfa4
--- /dev/null
+++ b/changelogs/unreleased/chore-admin-mode-rack-attack-default-paths-migration.yml
@@ -0,0 +1,5 @@
+---
+title: Add admin mode controller path to Rack::Attack defaults
+merge_request: 20735
+author: Diego Louzán
+type: changed
diff --git a/changelogs/unreleased/feat-circuit-project-service.yml b/changelogs/unreleased/feat-circuit-project-service.yml
new file mode 100644
index 00000000000..ec073ede9ee
--- /dev/null
+++ b/changelogs/unreleased/feat-circuit-project-service.yml
@@ -0,0 +1,5 @@
+---
+title: Add Unify Circuit project integration service
+merge_request: 19849
+author: Fabio Huser
+type: added
diff --git a/changelogs/unreleased/filter-for-project-and-group-audit-events.yml b/changelogs/unreleased/filter-for-project-and-group-audit-events.yml
new file mode 100644
index 00000000000..4fe4ea0beb5
--- /dev/null
+++ b/changelogs/unreleased/filter-for-project-and-group-audit-events.yml
@@ -0,0 +1,5 @@
+---
+title: Add created_before/after filter to group/project audit events
+merge_request: 20641
+author:
+type: added
diff --git a/changelogs/unreleased/fj-31133-snippet-content-size-limit.yml b/changelogs/unreleased/fj-31133-snippet-content-size-limit.yml
new file mode 100644
index 00000000000..acc8e4efb04
--- /dev/null
+++ b/changelogs/unreleased/fj-31133-snippet-content-size-limit.yml
@@ -0,0 +1,5 @@
+---
+title: Add limit for snippet content size
+merge_request: 20346
+author:
+type: performance
diff --git a/changelogs/unreleased/helm_values_default.yml b/changelogs/unreleased/helm_values_default.yml
new file mode 100644
index 00000000000..c731ef85e26
--- /dev/null
+++ b/changelogs/unreleased/helm_values_default.yml
@@ -0,0 +1,5 @@
+---
+title: Upgrade auto-deploy-image for helm default values file
+merge_request: 20588
+author:
+type: changed
diff --git a/db/migrate/20191118173522_add_snippet_size_limit_to_application_settings.rb b/db/migrate/20191118173522_add_snippet_size_limit_to_application_settings.rb
new file mode 100644
index 00000000000..b6b30febbd6
--- /dev/null
+++ b/db/migrate/20191118173522_add_snippet_size_limit_to_application_settings.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class AddSnippetSizeLimitToApplicationSettings < ActiveRecord::Migration[5.2]
+  DOWNTIME = false
+
+  def up
+    add_column :application_settings, :snippet_size_limit, :bigint, default: 50.megabytes, null: false
+  end
+
+  def down
+    remove_column :application_settings, :snippet_size_limit
+  end
+end
diff --git a/db/migrate/20191125114345_add_admin_mode_protected_path.rb b/db/migrate/20191125114345_add_admin_mode_protected_path.rb
new file mode 100644
index 00000000000..7e9b0d5a285
--- /dev/null
+++ b/db/migrate/20191125114345_add_admin_mode_protected_path.rb
@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+class AddAdminModeProtectedPath < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  ADMIN_MODE_ENDPOINT = '/admin/session'
+
+  OLD_DEFAULT_PROTECTED_PATHS = [
+      '/users/password',
+      '/users/sign_in',
+      '/api/v3/session.json',
+      '/api/v3/session',
+      '/api/v4/session.json',
+      '/api/v4/session',
+      '/users',
+      '/users/confirmation',
+      '/unsubscribes/',
+      '/import/github/personal_access_token'
+  ]
+
+  NEW_DEFAULT_PROTECTED_PATHS = OLD_DEFAULT_PROTECTED_PATHS.dup << ADMIN_MODE_ENDPOINT
+
+  class ApplicationSetting < ActiveRecord::Base
+    self.table_name = 'application_settings'
+  end
+
+  def up
+    change_column_default :application_settings, :protected_paths, NEW_DEFAULT_PROTECTED_PATHS
+
+    # schema allows nulls for protected_paths
+    ApplicationSetting.where.not(protected_paths: nil).each do |application_setting|
+      unless application_setting.protected_paths.include?(ADMIN_MODE_ENDPOINT)
+        updated_protected_paths = application_setting.protected_paths << ADMIN_MODE_ENDPOINT
+
+        application_setting.update(protected_paths: updated_protected_paths)
+      end
+    end
+  end
+
+  def down
+    change_column_default :application_settings, :protected_paths, OLD_DEFAULT_PROTECTED_PATHS
+
+    # schema allows nulls for protected_paths
+    ApplicationSetting.where.not(protected_paths: nil).each do |application_setting|
+      if application_setting.protected_paths.include?(ADMIN_MODE_ENDPOINT)
+        updated_protected_paths = application_setting.protected_paths - [ADMIN_MODE_ENDPOINT]
+
+        application_setting.update(protected_paths: updated_protected_paths)
+      end
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 782610b62f5..725bcec3767 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -328,7 +328,7 @@ ActiveRecord::Schema.define(version: 2019_11_25_140458) do
     t.boolean "throttle_protected_paths_enabled", default: false, null: false
     t.integer "throttle_protected_paths_requests_per_period", default: 10, null: false
     t.integer "throttle_protected_paths_period_in_seconds", default: 60, null: false
-    t.string "protected_paths", limit: 255, default: ["/users/password", "/users/sign_in", "/api/v3/session.json", "/api/v3/session", "/api/v4/session.json", "/api/v4/session", "/users", "/users/confirmation", "/unsubscribes/", "/import/github/personal_access_token"], array: true
+    t.string "protected_paths", limit: 255, default: ["/users/password", "/users/sign_in", "/api/v3/session.json", "/api/v3/session", "/api/v4/session.json", "/api/v4/session", "/users", "/users/confirmation", "/unsubscribes/", "/import/github/personal_access_token", "/admin/session"], array: true
     t.boolean "throttle_incident_management_notification_enabled", default: false, null: false
     t.integer "throttle_incident_management_notification_period_in_seconds", default: 3600
     t.integer "throttle_incident_management_notification_per_period", default: 3600
@@ -361,6 +361,7 @@ ActiveRecord::Schema.define(version: 2019_11_25_140458) do
     t.string "encrypted_slack_app_secret_iv", limit: 255
     t.text "encrypted_slack_app_verification_token"
     t.string "encrypted_slack_app_verification_token_iv", limit: 255
+    t.bigint "snippet_size_limit", default: 52428800, null: false
     t.index ["custom_project_templates_group_id"], name: "index_application_settings_on_custom_project_templates_group_id"
     t.index ["file_template_project_id"], name: "index_application_settings_on_file_template_project_id"
     t.index ["instance_administration_project_id"], name: "index_applicationsettings_on_instance_administration_project_id"
diff --git a/doc/administration/index.md b/doc/administration/index.md
index 3d70083892f..40ec9b85455 100644
--- a/doc/administration/index.md
+++ b/doc/administration/index.md
@@ -158,6 +158,10 @@ Learn how to install, configure, update, and maintain your GitLab instance.
 - [Shared Runners pipelines quota](../user/admin_area/settings/continuous_integration.md#shared-runners-pipeline-minutes-quota-starter-only): Limit the usage of pipeline minutes for Shared Runners. **(STARTER ONLY)**
 - [Enable/disable Auto DevOps](../topics/autodevops/index.md#enablingdisabling-auto-devops): Enable or disable Auto DevOps for your instance.
 
+## Snippet settings
+
+- [Setting snippet content size limit](snippets/index.md): Set a maximum size limit for snippets' content.
+
 ## Git configuration options
 
 - [Custom Git hooks](custom_hooks.md): Custom Git hooks (on the filesystem) for when webhooks aren't enough.
diff --git a/doc/administration/snippets/index.md b/doc/administration/snippets/index.md
new file mode 100644
index 00000000000..2e17db7b1f6
--- /dev/null
+++ b/doc/administration/snippets/index.md
@@ -0,0 +1,71 @@
+---
+type: reference, howto
+---
+
+# Snippets settings **(CORE ONLY)**
+
+Adjust the snippets' settings of your GitLab instance.
+
+## Snippets content size limit
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/31133) in GitLab 12.6.
+
+You can set a content size max limit in snippets. This limit can prevent
+abuses of the feature. The default content size limit is **52428800 Bytes** (50MB).
+
+### How does it work?
+
+The content size limit will be applied when a snippet is created or
+updated. Nevertheless, in order not to break any existing snippet,
+the limit will only be enforced in stored snippets when the content
+is updated.
+
+### Snippets size limit configuration
+
+This setting is not available through the [Admin Area settings](../../user/admin_area/settings/index.md).
+In order to configure this setting, use either the Rails console
+or the [Application settings API](../../api/settings.md).
+
+NOTE: **IMPORTANT:**
+The value of the limit **must** be in Bytes.
+
+#### Through the Rails console
+
+The steps to configure this setting through the Rails console are:
+
+1. Start the Rails console:
+
+   ```bash
+   # For Omnibus installations
+   sudo gitlab-rails console
+
+   # For installations from source
+   sudo -u git -H bundle exec rails console production
+   ```
+
+1. Update the snippets maximum file size:
+
+   ```ruby
+   ApplicationSetting.first.update!(snippet_size_limit: 50.megabytes)
+   ```
+
+To retrieve the current value, start the Rails console and run:
+
+  ```ruby
+  Gitlab::CurrentSettings.snippet_size_limit
+  ```
+
+#### Through the API
+
+The process to set the snippets size limit through the Application Settings API is
+exactly the same as you would do to [update any other setting](../../api/settings.md#change-application-settings).
+
+```bash
+curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/application/settings?snippet_size_limit=52428800
+```
+
+You can also use the API to [retrieve the current value](../../api/settings.md#get-current-application-settings).
+
+```bash
+curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/application/settings
+```
diff --git a/doc/api/services.md b/doc/api/services.md
index 609c7e62e36..02a31ba9d38 100644
--- a/doc/api/services.md
+++ b/doc/api/services.md
@@ -229,6 +229,51 @@ Get Campfire service settings for a project.
 GET /projects/:id/services/campfire
 ```
 
+## Unify Circuit
+
+Unify Circuit RTC and collaboration tool.
+
+### Create/Edit Unify Circuit service
+
+Set Unify Circuit service for a project.
+
+```
+PUT /projects/:id/services/unify-circuit
+```
+
+Parameters:
+
+| Parameter | Type | Required | Description |
+| --------- | ---- | -------- | ----------- |
+| `webhook` | string | true | The Unify Circuit webhook. For example, `https://circuit.com/rest/v2/webhooks/incoming/...`. |
+| `notify_only_broken_pipelines` | boolean | false | Send notifications for broken pipelines |
+| `branches_to_be_notified` | string | all | Branches to send notifications for. Valid options are "all", "default", "protected", and "default_and_protected" |
+| `push_events` | boolean | false | Enable notifications for push events |
+| `issues_events` | boolean | false | Enable notifications for issue events |
+| `confidential_issues_events` | boolean | false | Enable notifications for confidential issue events |
+| `merge_requests_events` | boolean | false | Enable notifications for merge request events |
+| `tag_push_events` | boolean | false | Enable notifications for tag push events |
+| `note_events` | boolean | false | Enable notifications for note events |
+| `confidential_note_events` | boolean | false | Enable notifications for confidential note events |
+| `pipeline_events` | boolean | false | Enable notifications for pipeline events |
+| `wiki_page_events` | boolean | false | Enable notifications for wiki page events |
+
+### Delete Unify Circuit service
+
+Delete Unify Circuit service for a project.
+
+```
+DELETE /projects/:id/services/unify-circuit
+```
+
+### Get Unify Circuit service settings
+
+Get Unify Circuit service settings for a project.
+
+```
+GET /projects/:id/services/unify-circuit
+```
+
 ## Custom Issue Tracker
 
 Custom issue tracker
@@ -480,6 +525,7 @@ Parameters:
 | `merge_requests_events` | boolean | false | Enable notifications for merge request events |
 | `tag_push_events` | boolean | false | Enable notifications for tag push events |
 | `note_events` | boolean | false | Enable notifications for note events |
+| `confidential_note_events` | boolean | false | Enable notifications for confidential note events |
 | `pipeline_events` | boolean | false | Enable notifications for pipeline events |
 | `wiki_page_events` | boolean | false | Enable notifications for wiki page events |
 
@@ -1088,6 +1134,7 @@ Parameters:
 | `merge_requests_events` | boolean | false | Enable notifications for merge request events |
 | `tag_push_events` | boolean | false | Enable notifications for tag push events |
 | `note_events` | boolean | false | Enable notifications for note events |
+| `confidential_note_events` | boolean | false | Enable notifications for confidential note events |
 | `pipeline_events` | boolean | false | Enable notifications for pipeline events |
 | `wiki_page_events` | boolean | false | Enable notifications for wiki page events |
 | `push_channel` | string | false | The name of the channel to receive push events notifications |
@@ -1095,6 +1142,7 @@ Parameters:
 | `confidential_issue_channel` | string | false | The name of the channel to receive confidential issues events notifications |
 | `merge_request_channel` | string | false | The name of the channel to receive merge request events notifications |
 | `note_channel` | string | false | The name of the channel to receive note events notifications |
+| `confidential_note_channel` | boolean | The name of the channel to receive confidential note events notifications |
 | `tag_push_channel` | string | false | The name of the channel to receive tag push events notifications |
 | `pipeline_channel` | string | false | The name of the channel to receive pipeline events notifications |
 | `wiki_page_channel` | string | false | The name of the channel to receive wiki page events notifications |
diff --git a/doc/api/settings.md b/doc/api/settings.md
index 9f9e90e4d11..ad9ffcbf872 100644
--- a/doc/api/settings.md
+++ b/doc/api/settings.md
@@ -350,3 +350,4 @@ are listed in the descriptions of the relevant settings.
 | `user_show_add_ssh_key_message`          | boolean          | no                                   | When set to `false` disable the "You won't be able to pull or push project code via SSH" warning shown to users with no uploaded SSH key. |
 | `version_check_enabled`                  | boolean          | no                                   | Let GitLab inform you when an update is available. |
 | `web_ide_clientside_preview_enabled`     | boolean          | no                                   | Client side evaluation (allow live previews of JavaScript projects in the Web IDE using CodeSandbox client side evaluation). |
+| `snippet_size_limit`                     | integer          | no                                   | Max snippet content size in **bytes**. Default: 52428800 Bytes (50MB).|
diff --git a/doc/ci/jenkins/index.md b/doc/ci/jenkins/index.md
index 321d0d2778f..6e9e723feb5 100644
--- a/doc/ci/jenkins/index.md
+++ b/doc/ci/jenkins/index.md
@@ -228,5 +228,5 @@ our very powerful [`only/except` rules system](../yaml/README.md#onlyexcept-basi
 
 ```yaml
 my_job:
-  only: branches
+  only: [branches]
 ```
diff --git a/doc/ci/merge_request_pipelines/index.md b/doc/ci/merge_request_pipelines/index.md
index a49279f1932..7a7fa08fac1 100644
--- a/doc/ci/merge_request_pipelines/index.md
+++ b/doc/ci/merge_request_pipelines/index.md
@@ -30,7 +30,7 @@ Pipelines for merge requests have the following requirements and limitations:
 
 ## Configuring pipelines for merge requests
 
-To configure pipelines for merge requests, add the `only: merge_requests` parameter to
+To configure pipelines for merge requests, add the `only: [merge_requests]` parameter to
 the jobs that you want to run only for merge requests.
 
 Then, when developers create or update merge requests, a pipeline runs
@@ -68,7 +68,7 @@ After the merge request is updated with new commits:
 - The pipeline fetches the latest code from the source branch and run tests against it.
 
 In the above example, the pipeline contains only a `test` job.
-Since the `build` and `deploy` jobs don't have the `only: merge_requests` parameter,
+Since the `build` and `deploy` jobs don't have the `only: [merge_requests]` parameter,
 they will not run in the merge request.
 
 Pipelines tagged with the **detached** badge indicate that they were triggered
@@ -86,7 +86,7 @@ Read the [documentation on Merge Trains](pipelines_for_merged_results/merge_trai
 
 ## Excluding certain jobs
 
-The behavior of the `only: merge_requests` parameter is such that _only_ jobs with
+The behavior of the `only: [merge_requests]` parameter is such that _only_ jobs with
 that parameter are run in the context of a merge request; no other jobs will be run.
 
 However, you may want to reverse this behavior, having all of your jobs to run _except_
diff --git a/doc/ci/yaml/README.md b/doc/ci/yaml/README.md
index a92c95ce7d8..4a06f99f99e 100644
--- a/doc/ci/yaml/README.md
+++ b/doc/ci/yaml/README.md
@@ -780,7 +780,7 @@ it is possible to define a job to be created based on files modified
 in a merge request.
 
 In order to deduce the correct base SHA of the source branch, we recommend combining
-this keyword with `only: merge_requests`. This way, file differences are correctly
+this keyword with `only: [merge_requests]`. This way, file differences are correctly
 calculated from any further commits, thus all changes in the merge requests are properly
 tested in pipelines.
 
@@ -802,7 +802,7 @@ either files in `service-one` directory or the `Dockerfile`, GitLab creates
 and triggers the `docker build service one` job.
 
 Note that if [pipelines for merge requests](../merge_request_pipelines/index.md) is
-combined with `only: change`, but `only: merge_requests` is omitted, there could be
+combined with `only: [change]`, but `only: [merge_requests]` is omitted, there could be
 unwanted behavior.
 
 For example:
diff --git a/doc/development/documentation/styleguide.md b/doc/development/documentation/styleguide.md
index 359bac75e0d..fac0a581957 100644
--- a/doc/development/documentation/styleguide.md
+++ b/doc/development/documentation/styleguide.md
@@ -699,7 +699,7 @@ nicely on different mobile devices.
 ## Code blocks
 
 - Always wrap code added to a sentence in inline code blocks (`` ` ``).
-  E.g., `.gitlab-ci.yml`, `git add .`, `CODEOWNERS`, `only: master`.
+  E.g., `.gitlab-ci.yml`, `git add .`, `CODEOWNERS`, `only: [master]`.
   File names, commands, entries, and anything that refers to code should be added to code blocks.
   To make things easier for the user, always add a full code block for things that can be
   useful to copy and paste, as they can easily do it with the button on code blocks.
diff --git a/doc/development/merge_request_performance_guidelines.md b/doc/development/merge_request_performance_guidelines.md
index 43059d23c79..ec50b1557d4 100644
--- a/doc/development/merge_request_performance_guidelines.md
+++ b/doc/development/merge_request_performance_guidelines.md
@@ -165,6 +165,54 @@ can quickly spiral out of control.
 There are some cases where this may be needed. If this is the case this should
 be clearly mentioned in the merge request description.
 
+## Batch process
+
+**Summary:** Iterating a single process to external services (e.g. PostgreSQL, Redis, Object Storage, etc)
+should be executed in a **batch-style** in order to reduce connection overheads.
+
+For fetching rows from various tables in a batch-style, please see [Eager Loading](#eager-loading) section.
+
+### Example: Delete multiple files from Object Storage
+
+When you delete multiple files from object storage (e.g. GCS),
+executing a single REST API call multiple times is a quite expensive
+process. Ideally, this should be done in a batch-style, for example, S3 provides
+[batch deletion API](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html),
+so it'd be a good idea to consider such an approach.
+
+The `FastDestroyAll` module might help this situation. It's a
+small framework when you remove a bunch of database rows and its associated data
+in a batch style.
+
+## Timeout
+
+**Summary:** You should set a reasonable timeout when the system invokes HTTP calls
+to external services (e.g. Kubernetes), and it should be executed in Sidekiq, not
+in Puma/Unicorn threads.
+
+Often, GitLab needs to communicate with an external service such as Kubernetes
+clusters. In this case, it's hard to estimate when the external service finishes
+the requested process, for example, if it's a user-owned cluster that is inactive for some reason,
+GitLab might wait for the response forever ([Example](https://gitlab.com/gitlab-org/gitlab/issues/31475)).
+This could result in Puma/Unicorn timeout and should be avoided at all cost.
+
+You should set a reasonable timeout, gracefully handle exceptions and surface the
+errors in UI or logging internally.
+
+Using [`ReactiveCaching`](https://docs.gitlab.com/ee/development/utilities.html#reactivecaching) is one of the best solutions to fetch external data.
+
+## Keep database transaction minimal
+
+**Summary:** You should avoid accessing to external services (e.g. Gitaly) during database
+transactions, otherwise it leads to severe contention problems
+as an open transaction basically blocks the release of a Postgres backend connection.
+
+For keeping transaction as minimal as possible, please consider using `AfterCommitQueue`
+module or `after_commit` AR hook.
+
+Here is [an example](https://gitlab.com/gitlab-org/gitlab/issues/36154#note_247228859)
+that one request to Gitaly instance during transaction triggered a P1 issue.
+
 ## Eager Loading
 
 **Summary:** always eager load associations when retrieving more than one row.
diff --git a/doc/security/rack_attack.md b/doc/security/rack_attack.md
index 51b7d7db3e4..9cbb296338a 100644
--- a/doc/security/rack_attack.md
+++ b/doc/security/rack_attack.md
@@ -53,7 +53,8 @@ default['gitlab']['gitlab-rails']['rack_attack_protected_paths'] = [
   '/users',
   '/users/confirmation',
   '/unsubscribes/',
-  '/import/github/personal_access_token'
+  '/import/github/personal_access_token',
+  '/admin/session'
 ]
 ```
 
diff --git a/doc/topics/autodevops/index.md b/doc/topics/autodevops/index.md
index f386c5ae42a..674e1193a02 100644
--- a/doc/topics/autodevops/index.md
+++ b/doc/topics/autodevops/index.md
@@ -651,6 +651,8 @@ procfile exec` to replicate the environment where your application will run.
 
 #### Workers
 
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/30628) in GitLab 12.6, `.gitlab/auto-deploy-values.yaml` will be used by default for Helm upgrades.
+
 Some web applications need to run extra deployments for "worker processes". For
 example, it is common in a Rails application to have a separate worker process
 to run background tasks like sending emails.
@@ -672,13 +674,18 @@ need to:
 - Set a CI variable `K8S_SECRET_REDIS_URL`, which the URL of this instance to
   ensure it's passed into your deployments.
 
-Once you have configured your worker to respond to health checks, you will
-need to configure a CI variable `HELM_UPGRADE_EXTRA_ARGS` with the value
-`--values helm-values.yaml`.
+Once you have configured your worker to respond to health checks, run a Sidekiq
+worker for your Rails application. For:
+
+- GitLab 12.6 and later, either:
+  - Add a file named `.gitlab/auto-deploy-values.yaml` to your repository. It will
+    be automatically used if found.
+  - Add a file with a different name or path to the repository, and override the value of the
+    `HELM_UPGRADE_VALUES_FILE` variable with the path and name.
+- GitLab 12.5 and earlier, run the worker with the `--values` parameter that specifies
+  a file in the repository.
 
-Then you can, for example, run a Sidekiq worker for your Rails application
-by adding a file named `helm-values.yaml` to your repository with the following
-content:
+In any case, the file must contain the following:
 
 ```yml
 workers:
@@ -983,6 +990,7 @@ applications.
 | `CANARY_PRODUCTION_REPLICAS`            | Number of canary replicas to deploy for [Canary Deployments](../../user/project/canary_deployments.md) in the production environment. Takes precedence over `CANARY_REPLICAS`. Defaults to 1. |
 | `CANARY_REPLICAS`                       | Number of canary replicas to deploy for [Canary Deployments](../../user/project/canary_deployments.md). Defaults to 1. |
 | `HELM_RELEASE_NAME`                     | From GitLab 12.1, allows the `helm` release name to be overridden. Can be used to assign unique release names when deploying multiple projects to a single namespace. |
+| `HELM_UPGRADE_VALUES_FILE`              | From GitLab 12.6, allows the `helm upgrade` values file to be overridden. Defaults to `.gitlab/auto-deploy-values.yaml`. |
 | `HELM_UPGRADE_EXTRA_ARGS`               | From GitLab 11.11, allows extra arguments in `helm` commands when deploying the application. Note that using quotes will not prevent word splitting. **Tip:** you can use this variable to [customize the Auto Deploy Helm chart](#custom-helm-chart) by applying custom override values with `--values my-values.yaml`. |
 | `INCREMENTAL_ROLLOUT_MODE`              | From GitLab 11.4, if present, can be used to enable an [incremental rollout](#incremental-rollout-to-production-premium) of your application for the production environment. Set to `manual` for manual deployment jobs or `timed` for automatic rollout deployments with a 5 minute delay each one. |
 | `K8S_SECRET_*`                          | From GitLab 11.7, any variable prefixed with [`K8S_SECRET_`](#application-secret-variables) will be made available by Auto DevOps as environment variables to the deployed application. |
diff --git a/doc/user/admin_area/settings/protected_paths.md b/doc/user/admin_area/settings/protected_paths.md
index 21c8d79b138..548352f7bfe 100644
--- a/doc/user/admin_area/settings/protected_paths.md
+++ b/doc/user/admin_area/settings/protected_paths.md
@@ -14,7 +14,8 @@ GitLab protects the following paths with Rack Attack by default:
 '/users',
 '/users/confirmation',
 '/unsubscribes/',
-'/import/github/personal_access_token'
+'/import/github/personal_access_token',
+'/admin/session'
 ```
 
 GitLab responds with HTTP status code `429` to POST requests at protected paths
diff --git a/doc/user/project/integrations/img/unify_circuit_configuration.png b/doc/user/project/integrations/img/unify_circuit_configuration.png
new file mode 100644
index 00000000000..285d4f92030
--- /dev/null
+++ b/doc/user/project/integrations/img/unify_circuit_configuration.png
diff --git a/doc/user/project/integrations/project_services.md b/doc/user/project/integrations/project_services.md
index 315039f82b3..f960c59850d 100644
--- a/doc/user/project/integrations/project_services.md
+++ b/doc/user/project/integrations/project_services.md
@@ -54,6 +54,7 @@ Click on the service links to see further configuration instructions and details
 | [Prometheus](prometheus.md) | Monitor the performance of your deployed apps |
 | Pushover | Pushover makes it easy to get real-time notifications on your Android device, iPhone, iPad, and Desktop |
 | [Redmine](redmine.md) | Redmine issue tracker |
+| [Unify Circuit](unify_circuit.md) | Receive events notifications in Unify Circuit |
 | [YouTrack](youtrack.md) | YouTrack issue tracker |
 
 ## Push hooks limit
diff --git a/doc/user/project/integrations/unify_circuit.md b/doc/user/project/integrations/unify_circuit.md
new file mode 100644
index 00000000000..e357afb9224
--- /dev/null
+++ b/doc/user/project/integrations/unify_circuit.md
@@ -0,0 +1,27 @@
+# Unify Circuit service
+
+The Unify Circuit service sends notifications from GitLab to the conversation for which the webhook was created.
+
+## On Unify Circuit
+
+1. Open the conversation in which you want to see the notifications.
+1. From the conversation menu, select **Configure Webhooks**.
+1. Click **ADD WEBHOOK** and fill in the name of the bot that will post the messages. Optionally define avatar.
+1. Click **SAVE** and copy the **Webhook URL** of your webhook.
+
+For more information, see the [Unify Circuit documentation for configuring incoming webhooks](https://www.circuit.com/unifyportalfaqdetail?articleId=164448).
+
+## On GitLab
+
+When you have the **Webhook URL** for your Unify Circuit conversation webhook, you can set up the GitLab service.
+
+1. Navigate to the [Integrations page](project_services.md#accessing-the-project-services) in your project's settings, i.e. **Project > Settings > Integrations**.
+1. Select the **Unify Circuit** project service to configure it.
+1. Check the **Active** checkbox to turn on the service.
+1. Check the checkboxes corresponding to the GitLab events you want to receive in Unify Circuit.
+1. Paste the **Webhook URL** that you copied from the Unify Circuit configuration step.
+1. Configure the remaining options and click `Save changes`.
+
+Your Unify Circuit conversation will now start receiving GitLab event notifications as configured.
+
+![Unify Circuit configuration](img/unify_circuit_configuration.png)
diff --git a/doc/user/project/merge_requests/merge_when_pipeline_succeeds.md b/doc/user/project/merge_requests/merge_when_pipeline_succeeds.md
index 6630179ea47..e1ac8b2183c 100644
--- a/doc/user/project/merge_requests/merge_when_pipeline_succeeds.md
+++ b/doc/user/project/merge_requests/merge_when_pipeline_succeeds.md
@@ -69,7 +69,7 @@ For example, to that on merge requests there is always a passing job even though
 
 ```yaml
 enable_merge:
-  only: merge_requests
+  only: [merge_requests]
   script:
     - echo true
 ```
diff --git a/lib/api/helpers/services_helpers.rb b/lib/api/helpers/services_helpers.rb
index 74051f2d69f..b77be6edcf7 100644
--- a/lib/api/helpers/services_helpers.rb
+++ b/lib/api/helpers/services_helpers.rb
@@ -134,6 +134,12 @@ module API
           },
           {
             required: false,
+            name: :confidential_note_events,
+            type: Boolean,
+            desc: 'Enable notifications for confidential_note_events'
+          },
+          {
+            required: false,
             name: :tag_push_events,
             type: Boolean,
             desc: 'Enable notifications for tag_push_events'
@@ -696,7 +702,16 @@ module API
               type: String,
               desc: 'The password of the user'
             }
-          ]
+          ],
+          'unify-circuit' => [
+            {
+              required: true,
+              name: :webhook,
+              type: String,
+              desc: 'The Unify Circuit webhook. e.g. https://circuit.com/rest/v2/webhooks/incoming/…'
+            },
+            chat_notification_events
+          ].flatten
         }
       end
 
diff --git a/lib/gitaly/server.rb b/lib/gitaly/server.rb
index 907c6e1b605..64ab5db4fcd 100644
--- a/lib/gitaly/server.rb
+++ b/lib/gitaly/server.rb
@@ -2,6 +2,8 @@
 
 module Gitaly
   class Server
+    SHA_VERSION_REGEX = /\A\d+\.\d+\.\d+-\d+-g([a-f0-9]{8})\z/.freeze
+
     class << self
       def all
         Gitlab.config.repositories.storages.keys.map { |s| Gitaly::Server.new(s) }
@@ -30,9 +32,10 @@ module Gitaly
       info.git_version
     end
 
-    def up_to_date?
-      server_version == Gitlab::GitalyClient.expected_server_version
+    def expected_version?
+      server_version == Gitlab::GitalyClient.expected_server_version || matches_sha?
     end
+    alias_method :up_to_date?, :expected_version?
 
     def read_writeable?
       readable? && writeable?
@@ -62,6 +65,13 @@ module Gitaly
       @storage_status ||= info.storage_statuses.find { |s| s.storage_name == storage }
     end
 
+    def matches_sha?
+      match = server_version.match(SHA_VERSION_REGEX)
+      return false unless match
+
+      Gitlab::GitalyClient.expected_server_version.start_with?(match[1])
+    end
+
     def info
       @info ||=
         begin
diff --git a/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml b/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml
index 738be44d5f4..cb45c12c2b0 100644
--- a/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml
+++ b/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml
@@ -1,5 +1,5 @@
 .auto-deploy:
-  image: "registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v0.7.0"
+  image: "registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v0.8.0"
 
 review:
   extends: .auto-deploy
diff --git a/lib/gitlab/database/migration_helpers.rb b/lib/gitlab/database/migration_helpers.rb
index 7ea7565f758..03bde611451 100644
--- a/lib/gitlab/database/migration_helpers.rb
+++ b/lib/gitlab/database/migration_helpers.rb
@@ -155,6 +155,7 @@ module Gitlab
       # column - The name of the column to create the foreign key on.
       # on_delete - The action to perform when associated data is removed,
       #             defaults to "CASCADE".
+      # name - The name of the foreign key.
       #
       # rubocop:disable Gitlab/RailsLogger
       def add_concurrent_foreign_key(source, target, column:, on_delete: :cascade, name: nil)
@@ -164,25 +165,31 @@ module Gitlab
           raise 'add_concurrent_foreign_key can not be run inside a transaction'
         end
 
-        on_delete = 'SET NULL' if on_delete == :nullify
+        options = {
+          column: column,
+          on_delete: on_delete,
+          name: name.presence || concurrent_foreign_key_name(source, column)
+        }
 
-        key_name = name || concurrent_foreign_key_name(source, column)
-
-        unless foreign_key_exists?(source, target, column: column)
-          Rails.logger.warn "Foreign key not created because it exists already " \
+        if foreign_key_exists?(source, target, options)
+          warning_message = "Foreign key not created because it exists already " \
             "(this may be due to an aborted migration or similar): " \
-            "source: #{source}, target: #{target}, column: #{column}"
+            "source: #{source}, target: #{target}, column: #{options[:column]}, "\
+            "name: #{options[:name]}, on_delete: #{options[:on_delete]}"
 
+          Rails.logger.warn warning_message
+        else
           # Using NOT VALID allows us to create a key without immediately
           # validating it. This means we keep the ALTER TABLE lock only for a
           # short period of time. The key _is_ enforced for any newly created
           # data.
+
           execute <<-EOF.strip_heredoc
           ALTER TABLE #{source}
-          ADD CONSTRAINT #{key_name}
-          FOREIGN KEY (#{column})
+          ADD CONSTRAINT #{options[:name]}
+          FOREIGN KEY (#{options[:column]})
           REFERENCES #{target} (id)
-          #{on_delete ? "ON DELETE #{on_delete.upcase}" : ''}
+          #{on_delete_statement(options[:on_delete])}
           NOT VALID;
           EOF
         end
@@ -193,18 +200,15 @@ module Gitlab
         #
         # Note this is a no-op in case the constraint is VALID already
         disable_statement_timeout do
-          execute("ALTER TABLE #{source} VALIDATE CONSTRAINT #{key_name};")
+          execute("ALTER TABLE #{source} VALIDATE CONSTRAINT #{options[:name]};")
         end
       end
       # rubocop:enable Gitlab/RailsLogger
 
-      def foreign_key_exists?(source, target = nil, column: nil)
-        foreign_keys(source).any? do |key|
-          if column
-            key.options[:column].to_s == column.to_s
-          else
-            key.to_table.to_s == target.to_s
-          end
+      def foreign_key_exists?(source, target = nil, **options)
+        foreign_keys(source).any? do |foreign_key|
+          tables_match?(target.to_s, foreign_key.to_table.to_s) &&
+            options_match?(foreign_key.options, options)
         end
       end
 
@@ -1050,6 +1054,21 @@ into similar problems in the future (e.g. when new tables are created).
 
       private
 
+      def tables_match?(target_table, foreign_key_table)
+        target_table.blank? || foreign_key_table == target_table
+      end
+
+      def options_match?(foreign_key_options, options)
+        options.all? { |k, v| foreign_key_options[k].to_s == v.to_s }
+      end
+
+      def on_delete_statement(on_delete)
+        return '' if on_delete.blank?
+        return 'ON DELETE SET NULL' if on_delete == :nullify
+
+        "ON DELETE #{on_delete.upcase}"
+      end
+
       def create_column_from(table, old, new, type: nil)
         old_col = column_for(table, old)
         new_type = type || old_col.type
diff --git a/lib/sentry/client.rb b/lib/sentry/client.rb
index 3aa3eb45d85..708ace53f5b 100644
--- a/lib/sentry/client.rb
+++ b/lib/sentry/client.rb
@@ -34,12 +34,18 @@ module Sentry
     end
 
     def list_issues(**keyword_args)
-      issues = get_issues(keyword_args)
+      response = get_issues(keyword_args)
+
+      issues = response[:issues]
+      pagination = response[:pagination]
 
       validate_size(issues)
 
       handle_mapping_exceptions do
-        map_to_errors(issues)
+        {
+          issues: map_to_errors(issues),
+          pagination: pagination
+        }
       end
     end
 
@@ -83,36 +89,40 @@ module Sentry
     end
 
     def get_issues(**keyword_args)
-      http_get(
+      response = http_get(
         issues_api_url,
         query: list_issue_sentry_query(keyword_args)
       )
+
+      {
+        issues: response[:body],
+        pagination: Sentry::PaginationParser.parse(response[:headers])
+      }
     end
 
-    def list_issue_sentry_query(issue_status:, limit:, sort: nil, search_term: '')
+    def list_issue_sentry_query(issue_status:, limit:, sort: nil, search_term: '', cursor: nil)
       unless SENTRY_API_SORT_VALUE_MAP.key?(sort)
         raise BadRequestError, 'Invalid value for sort param'
       end
 
-      query_params = {
+      {
         query: "is:#{issue_status} #{search_term}".strip,
         limit: limit,
-        sort: SENTRY_API_SORT_VALUE_MAP[sort]
-      }
-
-      query_params.compact
+        sort: SENTRY_API_SORT_VALUE_MAP[sort],
+        cursor: cursor
+      }.compact
     end
 
     def get_issue(issue_id:)
-      http_get(issue_api_url(issue_id))
+      http_get(issue_api_url(issue_id))[:body]
     end
 
     def get_issue_latest_event(issue_id:)
-      http_get(issue_latest_event_api_url(issue_id))
+      http_get(issue_latest_event_api_url(issue_id))[:body]
     end
 
     def get_projects
-      http_get(projects_api_url)
+      http_get(projects_api_url)[:body]
     end
 
     def handle_request_exceptions
@@ -138,7 +148,7 @@ module Sentry
         raise_error "Sentry response status code: #{response.code}"
       end
 
-      response.parsed_response
+      { body: response.parsed_response, headers: response.headers }
     end
 
     def raise_error(message)
diff --git a/lib/sentry/pagination_parser.rb b/lib/sentry/pagination_parser.rb
new file mode 100644
index 00000000000..fa9c1dd8694
--- /dev/null
+++ b/lib/sentry/pagination_parser.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Sentry
+  module PaginationParser
+    PATTERN = /rel=\"(?<direction>\w+)\";\sresults=\"(?<results>\w+)\";\scursor=\"(?<cursor>.+)\"/.freeze
+
+    def self.parse(headers)
+      links = headers['link'].to_s.split(',')
+
+      links.map { |link| parse_link(link) }.compact.to_h
+    end
+
+    def self.parse_link(link)
+      match = link.match(PATTERN)
+
+      return unless match
+      return if match['results'] != "true"
+
+      [match['direction'], { 'cursor' => match['cursor'] }]
+    end
+    private_class_method :parse_link
+  end
+end
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index bd3aca61343..5ad87093828 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -3361,6 +3361,9 @@ msgstr ""
 msgid "Clear"
 msgstr ""
 
+msgid "Clear chart filters"
+msgstr ""
+
 msgid "Clear input"
 msgstr ""
 
@@ -20934,6 +20937,9 @@ msgstr ""
 msgid "is not an email you own"
 msgstr ""
 
+msgid "is too long (%{current_value}). The maximum size is %{max_size}."
+msgstr ""
+
 msgid "is too long (maximum is 100 entries)"
 msgstr ""
 
diff --git a/qa/Gemfile b/qa/Gemfile
index 5266fc57b0a..3575ecf13e9 100644
--- a/qa/Gemfile
+++ b/qa/Gemfile
@@ -2,8 +2,8 @@ source 'https://rubygems.org'
 
 gem 'gitlab-qa'
 gem 'activesupport', '5.2.3' # This should stay in sync with the root's Gemfile
-gem 'capybara', '~> 2.16.1'
-gem 'capybara-screenshot', '~> 1.0.18'
+gem 'capybara', '~> 3.29.0'
+gem 'capybara-screenshot', '~> 1.0.23'
 gem 'rake', '~> 12.3.0'
 gem 'rspec', '~> 3.7'
 gem 'selenium-webdriver', '~> 3.12'
diff --git a/qa/Gemfile.lock b/qa/Gemfile.lock
index 91b2afb6927..a84b353170e 100644
--- a/qa/Gemfile.lock
+++ b/qa/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     airborne (0.2.13)
       activesupport
       rack
@@ -15,15 +15,16 @@ GEM
       rest-client (>= 1.7.3, < 3.0)
       rspec (~> 3.1)
     byebug (9.1.0)
-    capybara (2.16.1)
+    capybara (3.29.0)
       addressable
       mini_mime (>= 0.1.3)
-      nokogiri (>= 1.3.3)
-      rack (>= 1.0.0)
-      rack-test (>= 0.5.4)
-      xpath (~> 2.0)
-    capybara-screenshot (1.0.18)
-      capybara (>= 1.0, < 3)
+      nokogiri (~> 1.8)
+      rack (>= 1.6.0)
+      rack-test (>= 0.6.3)
+      regexp_parser (~> 1.5)
+      xpath (~> 3.2)
+    capybara-screenshot (1.0.23)
+      capybara (>= 1.0, < 4)
       launchy
     childprocess (3.0.0)
     coderay (1.1.2)
@@ -50,7 +51,7 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_mime (1.0.0)
+    mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     netrc (0.11.0)
@@ -65,11 +66,12 @@ GEM
     pry-byebug (3.5.1)
       byebug (~> 9.1)
       pry (~> 0.10)
-    public_suffix (3.0.1)
-    rack (2.0.6)
-    rack-test (0.8.2)
+    public_suffix (4.0.1)
+    rack (2.0.7)
+    rack-test (0.8.3)
       rack (>= 1.0, < 3)
-    rake (12.3.3)
+    rake (12.3.0)
+    regexp_parser (1.6.0)
     rest-client (2.0.2)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
@@ -103,8 +105,8 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.4)
-    xpath (2.1.0)
-      nokogiri (~> 1.3)
+    xpath (3.2.0)
+      nokogiri (~> 1.8)
 
 PLATFORMS
   ruby
@@ -112,8 +114,8 @@ PLATFORMS
 DEPENDENCIES
   activesupport (= 5.2.3)
   airborne (~> 0.2.13)
-  capybara (~> 2.16.1)
-  capybara-screenshot (~> 1.0.18)
+  capybara (~> 3.29.0)
+  capybara-screenshot (~> 1.0.23)
   debase (~> 0.2.4.1)
   faker (~> 1.6, >= 1.6.6)
   gitlab-qa
diff --git a/qa/qa/page/base.rb b/qa/qa/page/base.rb
index a080c4071ed..b28664b2921 100644
--- a/qa/qa/page/base.rb
+++ b/qa/qa/page/base.rb
@@ -141,6 +141,10 @@ module QA
         page.has_no_text? text
       end
 
+      def has_normalized_ws_text?(text, wait: Capybara.default_max_wait_time)
+        page.has_text?(text.gsub(/\s+/, " "), wait: wait)
+      end
+
       def finished_loading?
         has_no_css?('.fa-spinner', wait: Capybara.default_max_wait_time)
       end
diff --git a/qa/qa/page/project/pipeline/index.rb b/qa/qa/page/project/pipeline/index.rb
index b52f3e99a36..269d4dfc411 100644
--- a/qa/qa/page/project/pipeline/index.rb
+++ b/qa/qa/page/project/pipeline/index.rb
@@ -14,11 +14,7 @@ module QA::Page
       def click_on_latest_pipeline
         css = '.js-pipeline-url-link'
 
-        link = wait(reload: false) do
-          first(css)
-        end
-
-        link.click
+        first(css, wait: 60).click
       end
 
       def wait_for_latest_pipeline_success
diff --git a/qa/qa/runtime/browser.rb b/qa/qa/runtime/browser.rb
index 7e45e5e86ea..ea92cdbdb7f 100644
--- a/qa/qa/runtime/browser.rb
+++ b/qa/qa/runtime/browser.rb
@@ -132,6 +132,10 @@ module QA
           config.default_max_wait_time = CAPYBARA_MAX_WAIT_TIME
           # https://github.com/mattheworiordan/capybara-screenshot/issues/164
           config.save_path = ::File.expand_path('../../tmp', __dir__)
+
+          # Cabybara 3 does not normalize text by default, so older tests
+          # fail because of unexpected line breaks and other white space
+          config.default_normalize_ws = true
         end
       end
 
diff --git a/qa/qa/specs/features/browser_ui/3_create/repository/add_file_template_spec.rb b/qa/qa/specs/features/browser_ui/3_create/repository/add_file_template_spec.rb
index d2fd1d743fb..c119e447097 100644
--- a/qa/qa/specs/features/browser_ui/3_create/repository/add_file_template_spec.rb
+++ b/qa/qa/specs/features/browser_ui/3_create/repository/add_file_template_spec.rb
@@ -52,16 +52,16 @@ module QA
           Page::Project::Show.perform(&:create_new_file!)
           Page::File::Form.perform do |form|
             form.select_template template[:file_name], template[:name]
-          end
 
-          expect(page).to have_content(content[0..100])
+            expect(form).to have_normalized_ws_text(content[0..100])
 
-          Page::File::Form.perform(&:commit_changes)
+            form.commit_changes
 
-          expect(page).to have_content('The file has been successfully created.')
-          expect(page).to have_content(template[:file_name])
-          expect(page).to have_content('Add new file')
-          expect(page).to have_content(content[0..100])
+            expect(form).to have_content('The file has been successfully created.')
+            expect(form).to have_content(template[:file_name])
+            expect(form).to have_content('Add new file')
+            expect(form).to have_normalized_ws_text(content[0..100])
+          end
         end
       end
     end
diff --git a/qa/qa/specs/features/browser_ui/3_create/web_ide/add_file_template_spec.rb b/qa/qa/specs/features/browser_ui/3_create/web_ide/add_file_template_spec.rb
index 71b9971a0af..b91f944a162 100644
--- a/qa/qa/specs/features/browser_ui/3_create/web_ide/add_file_template_spec.rb
+++ b/qa/qa/specs/features/browser_ui/3_create/web_ide/add_file_template_spec.rb
@@ -54,15 +54,15 @@ module QA
             ide.create_new_file_from_template template[:file_name], template[:name]
 
             expect(ide.has_file?(template[:file_name])).to be_truthy
-          end
 
-          expect(page).to have_button('Undo')
-          expect(page).to have_content(content[0..100])
+            expect(ide).to have_button('Undo')
+            expect(ide).to have_normalized_ws_text(content[0..100])
 
-          Page::Project::WebIDE::Edit.perform(&:commit_changes)
+            ide.commit_changes
 
-          expect(page).to have_content(template[:file_name])
-          expect(page).to have_content(content[0..100])
+            expect(ide).to have_content(template[:file_name])
+            expect(ide).to have_normalized_ws_text(content[0..100])
+          end
         end
       end
     end
diff --git a/spec/controllers/projects/error_tracking_controller_spec.rb b/spec/controllers/projects/error_tracking_controller_spec.rb
index 45f3188baae..ab99e44e4ca 100644
--- a/spec/controllers/projects/error_tracking_controller_spec.rb
+++ b/spec/controllers/projects/error_tracking_controller_spec.rb
@@ -50,8 +50,6 @@ describe Projects::ErrorTrackingController do
       let(:external_url) { 'http://example.com' }
 
       context 'no data' do
-        let(:params) { project_params(format: :json) }
-
         let(:permitted_params) do
           ActionController::Parameters.new({}).permit!
         end
@@ -72,11 +70,13 @@ describe Projects::ErrorTrackingController do
         end
       end
 
-      context 'with a search_term and sort params' do
-        let(:params) { project_params(format: :json, search_term: 'something', sort: 'last_seen') }
-
+      context 'with extra params' do
+        let(:cursor) { '1572959139000:0:0' }
+        let(:search_term) { 'something' }
+        let(:sort) { 'last_seen' }
+        let(:params) { project_params(format: :json, search_term: search_term, sort: sort, cursor: cursor) }
         let(:permitted_params) do
-          ActionController::Parameters.new(search_term: 'something', sort: 'last_seen').permit!
+          ActionController::Parameters.new(search_term: search_term, sort: sort, cursor: cursor).permit!
         end
 
         before do
@@ -88,7 +88,7 @@ describe Projects::ErrorTrackingController do
         context 'service result is successful' do
           before do
             expect(list_issues_service).to receive(:execute)
-              .and_return(status: :success, issues: [error])
+              .and_return(status: :success, issues: [error], pagination: {})
             expect(list_issues_service).to receive(:external_url)
               .and_return(external_url)
           end
@@ -100,13 +100,16 @@ describe Projects::ErrorTrackingController do
 
             expect(response).to have_gitlab_http_status(:ok)
             expect(response).to match_response_schema('error_tracking/index')
-            expect(json_response['external_url']).to eq(external_url)
-            expect(json_response['errors']).to eq([error].as_json)
+            expect(json_response).to eq(
+              'errors' => [error].as_json,
+              'pagination' => {},
+              'external_url' => external_url
+            )
           end
         end
       end
 
-      context 'without params' do
+      context 'without extra params' do
         before do
           expect(ErrorTracking::ListIssuesService)
             .to receive(:new).with(project, user, {})
@@ -116,7 +119,7 @@ describe Projects::ErrorTrackingController do
         context 'service result is successful' do
           before do
             expect(list_issues_service).to receive(:execute)
-              .and_return(status: :success, issues: [error])
+              .and_return(status: :success, issues: [error], pagination: {})
             expect(list_issues_service).to receive(:external_url)
               .and_return(external_url)
           end
@@ -128,8 +131,11 @@ describe Projects::ErrorTrackingController do
 
             expect(response).to have_gitlab_http_status(:ok)
             expect(response).to match_response_schema('error_tracking/index')
-            expect(json_response['external_url']).to eq(external_url)
-            expect(json_response['errors']).to eq([error].as_json)
+            expect(json_response).to eq(
+              'errors' => [error].as_json,
+              'pagination' => {},
+              'external_url' => external_url
+            )
           end
         end
 
diff --git a/spec/fixtures/api/schemas/error_tracking/index.json b/spec/fixtures/api/schemas/error_tracking/index.json
index d3abc29ffa7..7a570641211 100644
--- a/spec/fixtures/api/schemas/error_tracking/index.json
+++ b/spec/fixtures/api/schemas/error_tracking/index.json
@@ -2,6 +2,7 @@
   "type": "object",
   "required": [
     "external_url",
+    "pagination",
     "errors"
   ],
   "properties": {
@@ -9,6 +10,9 @@
     "errors": {
       "type": "array",
       "items": { "$ref": "error.json" }
+    },
+    "pagination": {
+      "type": "object"
     }
   },
   "additionalProperties": false
diff --git a/spec/frontend/pipelines/graph/action_component_spec.js b/spec/frontend/pipelines/graph/action_component_spec.js
index 38ffe98c79b..a8fddd5fff2 100644
--- a/spec/frontend/pipelines/graph/action_component_spec.js
+++ b/spec/frontend/pipelines/graph/action_component_spec.js
@@ -20,6 +20,7 @@ describe('pipeline graph action component', () => {
         actionIcon: 'cancel',
       },
       sync: false,
+      attachToDocument: true,
     });
   });
 
diff --git a/spec/frontend/pipelines/pipeline_triggerer_spec.js b/spec/frontend/pipelines/pipeline_triggerer_spec.js
index 45ac278dd38..e211852f74b 100644
--- a/spec/frontend/pipelines/pipeline_triggerer_spec.js
+++ b/spec/frontend/pipelines/pipeline_triggerer_spec.js
@@ -1,9 +1,16 @@
-import { mount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
+import UserAvatarLink from '~/vue_shared/components/user_avatar/user_avatar_link.vue';
 import pipelineTriggerer from '~/pipelines/components/pipeline_triggerer.vue';
 
 describe('Pipelines Triggerer', () => {
   let wrapper;
 
+  const expectComponentWithProps = (Component, props = {}) => {
+    const componentWrapper = wrapper.find(Component);
+    expect(componentWrapper.isVisible()).toBe(true);
+    expect(componentWrapper.props()).toEqual(expect.objectContaining(props));
+  };
+
   const mockData = {
     pipeline: {
       user: {
@@ -15,9 +22,10 @@ describe('Pipelines Triggerer', () => {
   };
 
   const createComponent = () => {
-    wrapper = mount(pipelineTriggerer, {
+    wrapper = shallowMount(pipelineTriggerer, {
       propsData: mockData,
       sync: false,
+      attachToDocument: true,
     });
   };
 
@@ -33,14 +41,12 @@ describe('Pipelines Triggerer', () => {
     expect(wrapper.contains('.table-section')).toBe(true);
   });
 
-  it('should render triggerer information when triggerer is provided', () => {
-    const link = wrapper.find('.js-pipeline-url-user');
-
-    expect(link.attributes('href')).toEqual(mockData.pipeline.user.path);
-    expect(link.find('.js-user-avatar-image-toolip').text()).toEqual(mockData.pipeline.user.name);
-    expect(link.find('img.avatar').attributes('src')).toEqual(
-      `${mockData.pipeline.user.avatar_url}?width=26`,
-    );
+  it('should pass triggerer information when triggerer is provided', () => {
+    expectComponentWithProps(UserAvatarLink, {
+      linkHref: mockData.pipeline.user.path,
+      tooltipText: mockData.pipeline.user.name,
+      imgSrc: mockData.pipeline.user.avatar_url,
+    });
   });
 
   it('should render "API" when no triggerer is provided', () => {
@@ -50,7 +56,7 @@ describe('Pipelines Triggerer', () => {
       },
     });
 
-    wrapper.vm.$nextTick(() => {
+    return wrapper.vm.$nextTick(() => {
       expect(wrapper.find('.js-pipeline-url-api').text()).toEqual('API');
     });
   });
diff --git a/spec/lib/gitaly/server_spec.rb b/spec/lib/gitaly/server_spec.rb
index 12dfad6698d..184d049d1fb 100644
--- a/spec/lib/gitaly/server_spec.rb
+++ b/spec/lib/gitaly/server_spec.rb
@@ -65,4 +65,26 @@ describe Gitaly::Server do
       end
     end
   end
+
+  describe '#expected_version?' do
+    using RSpec::Parameterized::TableSyntax
+
+    where(:expected_version, :server_version, :result) do
+      '1.1.1'                                    | '1.1.1'               | true
+      '1.1.2'                                    | '1.1.1'               | false
+      '1.73.0'                                   | '1.73.0-18-gf756ebe2' | false
+      '594c3ea3e0e5540e5915bd1c49713a0381459dd6' | '1.55.6-45-g594c3ea3' | true
+      '594c3ea3e0e5540e5915bd1c49713a0381459dd6' | '1.55.6-46-gabc123ff' | false
+      '594c3ea3e0e5540e5915bd1c49713a0381459dd6' | '1.55.6'              | false
+    end
+
+    with_them do
+      it do
+        allow(Gitlab::GitalyClient).to receive(:expected_server_version).and_return(expected_version)
+        allow(server).to receive(:server_version).and_return(server_version)
+
+        expect(server.expected_version?).to eq(result)
+      end
+    end
+  end
 end
diff --git a/spec/lib/gitlab/database/migration_helpers_spec.rb b/spec/lib/gitlab/database/migration_helpers_spec.rb
index 449eee7a371..2ba253f9652 100644
--- a/spec/lib/gitlab/database/migration_helpers_spec.rb
+++ b/spec/lib/gitlab/database/migration_helpers_spec.rb
@@ -212,44 +212,118 @@ describe Gitlab::Database::MigrationHelpers do
         allow(model).to receive(:transaction_open?).and_return(false)
       end
 
-      it 'creates a concurrent foreign key and validates it' do
-        expect(model).to receive(:disable_statement_timeout).and_call_original
-        expect(model).to receive(:execute).with(/statement_timeout/)
-        expect(model).to receive(:execute).ordered.with(/NOT VALID/)
-        expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT/)
-        expect(model).to receive(:execute).with(/RESET ALL/)
+      context 'ON DELETE statements' do
+        context 'on_delete: :nullify' do
+          it 'appends ON DELETE SET NULL statement' do
+            expect(model).to receive(:disable_statement_timeout).and_call_original
+            expect(model).to receive(:execute).with(/statement_timeout/)
+            expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT/)
+            expect(model).to receive(:execute).with(/RESET ALL/)
+
+            expect(model).to receive(:execute).with(/ON DELETE SET NULL/)
+
+            model.add_concurrent_foreign_key(:projects, :users,
+                                             column: :user_id,
+                                             on_delete: :nullify)
+          end
+        end
 
-        model.add_concurrent_foreign_key(:projects, :users, column: :user_id)
-      end
+        context 'on_delete: :cascade' do
+          it 'appends ON DELETE CASCADE statement' do
+            expect(model).to receive(:disable_statement_timeout).and_call_original
+            expect(model).to receive(:execute).with(/statement_timeout/)
+            expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT/)
+            expect(model).to receive(:execute).with(/RESET ALL/)
+
+            expect(model).to receive(:execute).with(/ON DELETE CASCADE/)
+
+            model.add_concurrent_foreign_key(:projects, :users,
+                                             column: :user_id,
+                                             on_delete: :cascade)
+          end
+        end
+
+        context 'on_delete: nil' do
+          it 'appends no ON DELETE statement' do
+            expect(model).to receive(:disable_statement_timeout).and_call_original
+            expect(model).to receive(:execute).with(/statement_timeout/)
+            expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT/)
+            expect(model).to receive(:execute).with(/RESET ALL/)
 
-      it 'appends a valid ON DELETE statement' do
-        expect(model).to receive(:disable_statement_timeout).and_call_original
-        expect(model).to receive(:execute).with(/statement_timeout/)
-        expect(model).to receive(:execute).with(/ON DELETE SET NULL/)
-        expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT/)
-        expect(model).to receive(:execute).with(/RESET ALL/)
+            expect(model).not_to receive(:execute).with(/ON DELETE/)
 
-        model.add_concurrent_foreign_key(:projects, :users,
-                                         column: :user_id,
-                                         on_delete: :nullify)
+            model.add_concurrent_foreign_key(:projects, :users,
+                                             column: :user_id,
+                                             on_delete: nil)
+          end
+        end
       end
 
-      it 'does not create a foreign key if it exists already' do
-        expect(model).to receive(:foreign_key_exists?).with(:projects, :users, column: :user_id).and_return(true)
-        expect(model).not_to receive(:execute).with(/ADD CONSTRAINT/)
-        expect(model).to receive(:execute).with(/VALIDATE CONSTRAINT/)
+      context 'when no custom key name is supplied' do
+        it 'creates a concurrent foreign key and validates it' do
+          expect(model).to receive(:disable_statement_timeout).and_call_original
+          expect(model).to receive(:execute).with(/statement_timeout/)
+          expect(model).to receive(:execute).ordered.with(/NOT VALID/)
+          expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT/)
+          expect(model).to receive(:execute).with(/RESET ALL/)
+
+          model.add_concurrent_foreign_key(:projects, :users, column: :user_id)
+        end
+
+        it 'does not create a foreign key if it exists already' do
+          name = model.concurrent_foreign_key_name(:projects, :user_id)
+          expect(model).to receive(:foreign_key_exists?).with(:projects, :users,
+                                                              column: :user_id,
+                                                              on_delete: :cascade,
+                                                              name: name).and_return(true)
+
+          expect(model).not_to receive(:execute).with(/ADD CONSTRAINT/)
+          expect(model).to receive(:execute).with(/VALIDATE CONSTRAINT/)
 
-        model.add_concurrent_foreign_key(:projects, :users, column: :user_id)
+          model.add_concurrent_foreign_key(:projects, :users, column: :user_id)
+        end
       end
 
-      it 'allows the use of a custom key name' do
-        expect(model).to receive(:disable_statement_timeout).and_call_original
-        expect(model).to receive(:execute).with(/statement_timeout/)
-        expect(model).to receive(:execute).ordered.with(/NOT VALID/)
-        expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT.+foo/)
-        expect(model).to receive(:execute).with(/RESET ALL/)
+      context 'when a custom key name is supplied' do
+        context 'for creating a new foreign key for a column that does not presently exist' do
+          it 'creates a new foreign key' do
+            expect(model).to receive(:disable_statement_timeout).and_call_original
+            expect(model).to receive(:execute).with(/statement_timeout/)
+            expect(model).to receive(:execute).ordered.with(/NOT VALID/)
+            expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT.+foo/)
+            expect(model).to receive(:execute).with(/RESET ALL/)
+
+            model.add_concurrent_foreign_key(:projects, :users, column: :user_id, name: :foo)
+          end
+        end
+
+        context 'for creating a duplicate foreign key for a column that presently exists' do
+          context 'when the supplied key name is the same as the existing foreign key name' do
+            it 'does not create a new foreign key' do
+              expect(model).to receive(:foreign_key_exists?).with(:projects, :users,
+                                                                  name: :foo,
+                                                                  on_delete: :cascade,
+                                                                  column: :user_id).and_return(true)
+
+              expect(model).not_to receive(:execute).with(/ADD CONSTRAINT/)
+              expect(model).to receive(:execute).with(/VALIDATE CONSTRAINT/)
+
+              model.add_concurrent_foreign_key(:projects, :users, column: :user_id, name: :foo)
+            end
+          end
+
+          context 'when the supplied key name is different from the existing foreign key name' do
+            it 'creates a new foreign key' do
+              expect(model).to receive(:disable_statement_timeout).and_call_original
+              expect(model).to receive(:execute).with(/statement_timeout/)
+              expect(model).to receive(:execute).ordered.with(/NOT VALID/)
+              expect(model).to receive(:execute).ordered.with(/VALIDATE CONSTRAINT.+bar/)
+              expect(model).to receive(:execute).with(/RESET ALL/)
 
-        model.add_concurrent_foreign_key(:projects, :users, column: :user_id, name: :foo)
+              model.add_concurrent_foreign_key(:projects, :users, column: :user_id, name: :bar)
+            end
+          end
+        end
       end
     end
   end
@@ -266,23 +340,61 @@ describe Gitlab::Database::MigrationHelpers do
 
   describe '#foreign_key_exists?' do
     before do
-      key = ActiveRecord::ConnectionAdapters::ForeignKeyDefinition.new(:projects, :users, { column: :non_standard_id })
+      key = ActiveRecord::ConnectionAdapters::ForeignKeyDefinition.new(:projects, :users, { column: :non_standard_id, name: :fk_projects_users_non_standard_id, on_delete: :cascade })
       allow(model).to receive(:foreign_keys).with(:projects).and_return([key])
     end
 
-    it 'finds existing foreign keys by column' do
-      expect(model.foreign_key_exists?(:projects, :users, column: :non_standard_id)).to be_truthy
+    shared_examples_for 'foreign key checks' do
+      it 'finds existing foreign keys by column' do
+        expect(model.foreign_key_exists?(:projects, target_table, column: :non_standard_id)).to be_truthy
+      end
+
+      it 'finds existing foreign keys by name' do
+        expect(model.foreign_key_exists?(:projects, target_table, name: :fk_projects_users_non_standard_id)).to be_truthy
+      end
+
+      it 'finds existing foreign_keys by name and column' do
+        expect(model.foreign_key_exists?(:projects, target_table, name: :fk_projects_users_non_standard_id, column: :non_standard_id)).to be_truthy
+      end
+
+      it 'finds existing foreign_keys by name, column and on_delete' do
+        expect(model.foreign_key_exists?(:projects, target_table, name: :fk_projects_users_non_standard_id, column: :non_standard_id, on_delete: :cascade)).to be_truthy
+      end
+
+      it 'finds existing foreign keys by target table only' do
+        expect(model.foreign_key_exists?(:projects, target_table)).to be_truthy
+      end
+
+      it 'compares by column name if given' do
+        expect(model.foreign_key_exists?(:projects, target_table, column: :user_id)).to be_falsey
+      end
+
+      it 'compares by foreign key name if given' do
+        expect(model.foreign_key_exists?(:projects, target_table, name: :non_existent_foreign_key_name)).to be_falsey
+      end
+
+      it 'compares by foreign key name and column if given' do
+        expect(model.foreign_key_exists?(:projects, target_table, name: :non_existent_foreign_key_name, column: :non_standard_id)).to be_falsey
+      end
+
+      it 'compares by foreign key name, column and on_delete if given' do
+        expect(model.foreign_key_exists?(:projects, target_table, name: :fk_projects_users_non_standard_id, column: :non_standard_id, on_delete: :nullify)).to be_falsey
+      end
     end
 
-    it 'finds existing foreign keys by target table only' do
-      expect(model.foreign_key_exists?(:projects, :users)).to be_truthy
+    context 'without specifying a target table' do
+      let(:target_table) { nil }
+
+      it_behaves_like 'foreign key checks'
     end
 
-    it 'compares by column name if given' do
-      expect(model.foreign_key_exists?(:projects, :users, column: :user_id)).to be_falsey
+    context 'specifying a target table' do
+      let(:target_table) { :users }
+
+      it_behaves_like 'foreign key checks'
     end
 
-    it 'compares by target if no column given' do
+    it 'compares by target table if no column given' do
       expect(model.foreign_key_exists?(:projects, :other_table)).to be_falsey
     end
   end
diff --git a/spec/lib/gitlab/import_export/all_models.yml b/spec/lib/gitlab/import_export/all_models.yml
index 7e39e9989e5..24f0eb9a30c 100644
--- a/spec/lib/gitlab/import_export/all_models.yml
+++ b/spec/lib/gitlab/import_export/all_models.yml
@@ -290,6 +290,7 @@ project:
 - microsoft_teams_service
 - mattermost_service
 - hangouts_chat_service
+- unify_circuit_service
 - buildkite_service
 - bamboo_service
 - teamcity_service
diff --git a/spec/lib/sentry/client_spec.rb b/spec/lib/sentry/client_spec.rb
index ed9da77038f..388a6418929 100644
--- a/spec/lib/sentry/client_spec.rb
+++ b/spec/lib/sentry/client_spec.rb
@@ -54,10 +54,20 @@ describe Sentry::Client do
     end
   end
 
+  shared_examples 'issues has correct return type' do |klass|
+    it "returns objects of type #{klass}" do
+      expect(subject[:issues]).to all( be_a(klass) )
+    end
+  end
+
   shared_examples 'has correct length' do |length|
     it { expect(subject.length).to eq(length) }
   end
 
+  shared_examples 'issues has correct length' do |length|
+    it { expect(subject[:issues].length).to eq(length) }
+  end
+
   # Requires sentry_api_request and subject to be defined
   shared_examples 'calls sentry api' do
     it 'calls sentry api' do
@@ -95,26 +105,44 @@ describe Sentry::Client do
     let(:issue_status) { 'unresolved' }
     let(:limit) { 20 }
     let(:search_term) { '' }
+    let(:cursor) { nil }
+    let(:sort) { 'last_seen' }
     let(:sentry_api_response) { issues_sample_response }
     let(:sentry_request_url) { sentry_url + '/issues/?limit=20&query=is:unresolved' }
 
     let!(:sentry_api_request) { stub_sentry_request(sentry_request_url, body: sentry_api_response) }
 
-    subject { client.list_issues(issue_status: issue_status, limit: limit, search_term: search_term, sort: 'last_seen') }
+    subject { client.list_issues(issue_status: issue_status, limit: limit, search_term: search_term, sort: sort, cursor: cursor) }
 
     it_behaves_like 'calls sentry api'
 
-    it_behaves_like 'has correct return type', Gitlab::ErrorTracking::Error
-    it_behaves_like 'has correct length', 1
+    it_behaves_like 'issues has correct return type', Gitlab::ErrorTracking::Error
+    it_behaves_like 'issues has correct length', 1
 
     shared_examples 'has correct external_url' do
       context 'external_url' do
         it 'is constructed correctly' do
-          expect(subject[0].external_url).to eq('https://sentrytest.gitlab.com/sentry-org/sentry-project/issues/11')
+          expect(subject[:issues][0].external_url).to eq('https://sentrytest.gitlab.com/sentry-org/sentry-project/issues/11')
         end
       end
     end
 
+    context 'when response has a pagination info' do
+      let(:headers) do
+        {
+          link: '<https://sentrytest.gitlab.com>; rel="previous"; results="true"; cursor="1573556671000:0:1", <https://sentrytest.gitlab.com>; rel="next"; results="true"; cursor="1572959139000:0:0"'
+        }
+      end
+      let!(:sentry_api_request) { stub_sentry_request(sentry_request_url, body: sentry_api_response, headers: headers) }
+
+      it 'parses the pagination' do
+        expect(subject[:pagination]).to eq(
+          'previous' => { 'cursor' => '1573556671000:0:1' },
+          'next' => { 'cursor' => '1572959139000:0:0' }
+        )
+      end
+    end
+
     context 'error object created from sentry response' do
       using RSpec::Parameterized::TableSyntax
 
@@ -137,7 +165,7 @@ describe Sentry::Client do
       end
 
       with_them do
-        it { expect(subject[0].public_send(error_object)).to eq(sentry_api_response[0].dig(*sentry_response)) }
+        it { expect(subject[:issues][0].public_send(error_object)).to eq(sentry_api_response[0].dig(*sentry_response)) }
       end
 
       it_behaves_like 'has correct external_url'
@@ -210,8 +238,8 @@ describe Sentry::Client do
 
       it_behaves_like 'calls sentry api'
 
-      it_behaves_like 'has correct return type', Gitlab::ErrorTracking::Error
-      it_behaves_like 'has correct length', 1
+      it_behaves_like 'issues has correct return type', Gitlab::ErrorTracking::Error
+      it_behaves_like 'issues has correct length', 1
 
       it_behaves_like 'has correct external_url'
     end
@@ -240,13 +268,23 @@ describe Sentry::Client do
     it_behaves_like 'maps exceptions'
 
     context 'when search term is present' do
-      let(:search_term) { 'NoMethodError'}
+      let(:search_term) { 'NoMethodError' }
       let(:sentry_request_url) { "#{sentry_url}/issues/?limit=20&query=is:unresolved NoMethodError" }
 
       it_behaves_like 'calls sentry api'
 
-      it_behaves_like 'has correct return type', Gitlab::ErrorTracking::Error
-      it_behaves_like 'has correct length', 1
+      it_behaves_like 'issues has correct return type', Gitlab::ErrorTracking::Error
+      it_behaves_like 'issues has correct length', 1
+    end
+
+    context 'when cursor is present' do
+      let(:cursor) { '1572959139000:0:0' }
+      let(:sentry_request_url) { "#{sentry_url}/issues/?limit=20&cursor=#{cursor}&query=is:unresolved" }
+
+      it_behaves_like 'calls sentry api'
+
+      it_behaves_like 'issues has correct return type', Gitlab::ErrorTracking::Error
+      it_behaves_like 'issues has correct length', 1
     end
   end
 
diff --git a/spec/lib/sentry/pagination_parser_spec.rb b/spec/lib/sentry/pagination_parser_spec.rb
new file mode 100644
index 00000000000..1be6f9f4163
--- /dev/null
+++ b/spec/lib/sentry/pagination_parser_spec.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'support/helpers/fixture_helpers'
+
+describe Sentry::PaginationParser do
+  include FixtureHelpers
+
+  describe '.parse' do
+    subject { described_class.parse(headers) }
+
+    context 'when headers do not have "link" param' do
+      let(:headers) { {} }
+
+      it 'returns empty hash' do
+        is_expected.to eq({})
+      end
+    end
+
+    context 'when headers.link has previous and next pages' do
+      let(:headers) do
+        {
+          'link' => '<https://sentrytest.gitlab.com>; rel="previous"; results="true"; cursor="1573556671000:0:1", <https://sentrytest.gitlab.com>; rel="next"; results="true"; cursor="1572959139000:0:0"'
+        }
+      end
+
+      it 'returns info about both pages' do
+        is_expected.to eq(
+          'previous' => { 'cursor' => '1573556671000:0:1' },
+          'next' => { 'cursor' => '1572959139000:0:0' }
+        )
+      end
+    end
+
+    context 'when headers.link has only next page' do
+      let(:headers) do
+        {
+          'link' => '<https://sentrytest.gitlab.com>; rel="previous"; results="false"; cursor="1573556671000:0:1", <https://sentrytest.gitlab.com>; rel="next"; results="true"; cursor="1572959139000:0:0"'
+        }
+      end
+
+      it 'returns only info about the next page' do
+        is_expected.to eq(
+          'next' => { 'cursor' => '1572959139000:0:0' }
+        )
+      end
+    end
+
+    context 'when headers.link has only previous page' do
+      let(:headers) do
+        {
+          'link' => '<https://sentrytest.gitlab.com>; rel="previous"; results="true"; cursor="1573556671000:0:1", <https://sentrytest.gitlab.com>; rel="next"; results="false"; cursor="1572959139000:0:0"'
+        }
+      end
+
+      it 'returns only info about the previous page' do
+        is_expected.to eq(
+          'previous' => { 'cursor' => '1573556671000:0:1' }
+        )
+      end
+    end
+  end
+end
diff --git a/spec/migrations/20191125114345_add_admin_mode_protected_path_spec.rb b/spec/migrations/20191125114345_add_admin_mode_protected_path_spec.rb
new file mode 100644
index 00000000000..110da221393
--- /dev/null
+++ b/spec/migrations/20191125114345_add_admin_mode_protected_path_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'migrate', '20191125114345_add_admin_mode_protected_path.rb')
+
+describe AddAdminModeProtectedPath, :migration do
+  ADMIN_MODE_ENDPOINT = '/admin/session'
+
+  subject(:migration) { described_class.new }
+
+  let(:application_settings) { table(:application_settings) }
+
+  context 'no settings available' do
+    it 'makes no changes' do
+      expect { migrate! }.not_to change { application_settings.count }
+    end
+  end
+
+  context 'protected_paths is null' do
+    before do
+      application_settings.create!(protected_paths: nil)
+    end
+
+    it 'makes no changes' do
+      expect { migrate! }.not_to change { application_settings.first.protected_paths }
+    end
+  end
+
+  it 'appends admin mode endpoint' do
+    application_settings.create!(protected_paths: '{a,b,c}')
+
+    protected_paths_before = %w[a b c]
+    protected_paths_after = protected_paths_before.dup << ADMIN_MODE_ENDPOINT
+
+    expect { migrate! }.to change { application_settings.first.protected_paths }.from(protected_paths_before).to(protected_paths_after)
+  end
+
+  it 'new default includes admin mode endpoint' do
+    settings_before = application_settings.create!
+
+    expect(settings_before.protected_paths).not_to include(ADMIN_MODE_ENDPOINT)
+
+    migrate!
+
+    application_settings.reset_column_information
+    settings_after = application_settings.create!
+
+    expect(settings_after.protected_paths).to include(ADMIN_MODE_ENDPOINT)
+  end
+end
diff --git a/spec/models/application_setting_spec.rb b/spec/models/application_setting_spec.rb
index ba3b99f4421..9a76be5b6f1 100644
--- a/spec/models/application_setting_spec.rb
+++ b/spec/models/application_setting_spec.rb
@@ -66,6 +66,8 @@ describe ApplicationSetting do
     it { is_expected.not_to allow_value('three').for(:push_event_activities_limit) }
     it { is_expected.not_to allow_value(nil).for(:push_event_activities_limit) }
 
+    it { is_expected.to validate_numericality_of(:snippet_size_limit).only_integer.is_greater_than(0) }
+
     context 'when snowplow is enabled' do
       before do
         setting.snowplow_enabled = true
diff --git a/spec/models/error_tracking/project_error_tracking_setting_spec.rb b/spec/models/error_tracking/project_error_tracking_setting_spec.rb
index dbd3f8ffab3..27406533e5f 100644
--- a/spec/models/error_tracking/project_error_tracking_setting_spec.rb
+++ b/spec/models/error_tracking/project_error_tracking_setting_spec.rb
@@ -153,9 +153,9 @@ describe ErrorTracking::ProjectErrorTrackingSetting do
 
       it 'returns cached issues' do
         expect(sentry_client).to receive(:list_issues).with(opts)
-          .and_return(issues)
+          .and_return(issues: issues, pagination: {})
 
-        expect(result).to eq(issues: issues)
+        expect(result).to eq(issues: issues, pagination: {})
       end
     end
 
diff --git a/spec/models/project_services/unify_circuit_service_spec.rb b/spec/models/project_services/unify_circuit_service_spec.rb
new file mode 100644
index 00000000000..51079ea5395
--- /dev/null
+++ b/spec/models/project_services/unify_circuit_service_spec.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+describe UnifyCircuitService do
+  it_behaves_like "chat service", "Unify Circuit" do
+    let(:client_arguments) { webhook_url }
+    let(:content_key) { :subject }
+  end
+end
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index cf7bc59f89d..1ebac936341 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -33,6 +33,7 @@ describe Project do
     it { is_expected.to have_one(:microsoft_teams_service) }
     it { is_expected.to have_one(:mattermost_service) }
     it { is_expected.to have_one(:hangouts_chat_service) }
+    it { is_expected.to have_one(:unify_circuit_service) }
     it { is_expected.to have_one(:packagist_service) }
     it { is_expected.to have_one(:pushover_service) }
     it { is_expected.to have_one(:asana_service) }
diff --git a/spec/models/snippet_spec.rb b/spec/models/snippet_spec.rb
index cfc0703af23..82836dac1d7 100644
--- a/spec/models/snippet_spec.rb
+++ b/spec/models/snippet_spec.rb
@@ -31,6 +31,62 @@ describe Snippet do
     it { is_expected.to validate_presence_of(:content) }
 
     it { is_expected.to validate_inclusion_of(:visibility_level).in_array(Gitlab::VisibilityLevel.values) }
+
+    it do
+      allow(Gitlab::CurrentSettings).to receive(:snippet_size_limit).and_return(1)
+
+      is_expected
+        .to validate_length_of(:content)
+              .is_at_most(Gitlab::CurrentSettings.snippet_size_limit)
+              .with_message("is too long (2 Bytes). The maximum size is 1 Byte.")
+    end
+
+    context 'content validations' do
+      context 'with existing snippets' do
+        let(:snippet) { create(:personal_snippet, content: 'This is a valid content at the time of creation') }
+
+        before do
+          expect(snippet).to be_valid
+
+          stub_application_setting(snippet_size_limit: 2)
+        end
+
+        it 'does not raise a validation error if the content is not changed' do
+          snippet.title = 'new title'
+
+          expect(snippet).to be_valid
+        end
+
+        it 'raises and error if the content is changed and the size is bigger than limit' do
+          snippet.content = snippet.content + "test"
+
+          expect(snippet).not_to be_valid
+        end
+      end
+
+      context 'with new snippets' do
+        let(:limit) { 15 }
+
+        before do
+          stub_application_setting(snippet_size_limit: limit)
+        end
+
+        it 'is valid when content is smaller than the limit' do
+          snippet = build(:personal_snippet, content: 'Valid Content')
+
+          expect(snippet).to be_valid
+        end
+
+        it 'raises error when content is bigger than setting limit' do
+          snippet = build(:personal_snippet, content: 'This is an invalid content')
+
+          aggregate_failures do
+            expect(snippet).not_to be_valid
+            expect(snippet.errors[:content]).to include("is too long (#{snippet.content.size} Bytes). The maximum size is #{limit} Bytes.")
+          end
+        end
+      end
+    end
   end
 
   describe '#to_reference' do
diff --git a/spec/requests/api/settings_spec.rb b/spec/requests/api/settings_spec.rb
index b7586307929..6599e4b8f23 100644
--- a/spec/requests/api/settings_spec.rb
+++ b/spec/requests/api/settings_spec.rb
@@ -36,6 +36,7 @@ describe API::Settings, 'Settings' do
       expect(json_response['allow_local_requests_from_system_hooks']).to be(true)
       expect(json_response).not_to have_key('performance_bar_allowed_group_path')
       expect(json_response).not_to have_key('performance_bar_enabled')
+      expect(json_response['snippet_size_limit']).to eq(50.megabytes)
     end
   end
 
@@ -85,7 +86,8 @@ describe API::Settings, 'Settings' do
             allow_local_requests_from_web_hooks_and_services: true,
             allow_local_requests_from_system_hooks: false,
             push_event_hooks_limit: 2,
-            push_event_activities_limit: 2
+            push_event_activities_limit: 2,
+            snippet_size_limit: 5
           }
 
         expect(response).to have_gitlab_http_status(200)
@@ -121,6 +123,7 @@ describe API::Settings, 'Settings' do
         expect(json_response['allow_local_requests_from_system_hooks']).to eq(false)
         expect(json_response['push_event_hooks_limit']).to eq(2)
         expect(json_response['push_event_activities_limit']).to eq(2)
+        expect(json_response['snippet_size_limit']).to eq(5)
       end
     end
 
diff --git a/spec/services/error_tracking/list_issues_service_spec.rb b/spec/services/error_tracking/list_issues_service_spec.rb
index 67455190450..e0e280591cd 100644
--- a/spec/services/error_tracking/list_issues_service_spec.rb
+++ b/spec/services/error_tracking/list_issues_service_spec.rb
@@ -5,13 +5,14 @@ require 'spec_helper'
 describe ErrorTracking::ListIssuesService do
   set(:user) { create(:user) }
   set(:project) { create(:project) }
-  let(:params) { { search_term: 'something', sort: 'last_seen' } }
+  let(:params) { { search_term: 'something', sort: 'last_seen', cursor: 'some-cursor' } }
   let(:list_sentry_issues_args) do
     {
       issue_status: 'unresolved',
       limit: 20,
-      search_term: params[:search_term],
-      sort: params[:sort]
+      search_term: 'something',
+      sort: 'last_seen',
+      cursor: 'some-cursor'
     }
   end
 
@@ -40,11 +41,11 @@ describe ErrorTracking::ListIssuesService do
           expect(error_tracking_setting)
             .to receive(:list_sentry_issues)
             .with(list_sentry_issues_args)
-            .and_return(issues: issues)
+            .and_return(issues: issues, pagination: {})
         end
 
         it 'returns the issues' do
-          expect(result).to eq(status: :success, issues: issues)
+          expect(result).to eq(status: :success, pagination: {}, issues: issues)
         end
       end
 
diff --git a/spec/support/shared_examples/models/chat_service_shared_examples.rb b/spec/support/shared_examples/models/chat_service_shared_examples.rb
index 98bf647a9bc..7936a8eb974 100644
--- a/spec/support/shared_examples/models/chat_service_shared_examples.rb
+++ b/spec/support/shared_examples/models/chat_service_shared_examples.rb
@@ -80,7 +80,7 @@ shared_examples_for "chat service" do |service_name|
 
       it_behaves_like "triggered #{service_name} service"
 
-      it "specifies the webhook when it is configured" do
+      it "specifies the webhook when it is configured", if: defined?(client) do
         expect(client).to receive(:new).with(client_arguments).and_return(double(:chat_service).as_null_object)
 
         subject.execute(sample_data)