diff --git a/app/assets/javascripts/ci_variable_list/components/ci_variable_modal.vue b/app/assets/javascripts/ci_variable_list/components/ci_variable_modal.vue
index af4349083b6..be7c0b68b4c 100644
--- a/app/assets/javascripts/ci_variable_list/components/ci_variable_modal.vue
+++ b/app/assets/javascripts/ci_variable_list/components/ci_variable_modal.vue
@@ -265,7 +265,6 @@ export default {
         <gl-form-checkbox
           ref="masked-ci-variable"
           v-model="masked"
-          data-qa-selector="ci_variable_masked_checkbox"
           data-testid="ci-variable-masked-checkbox"
         >
           {{ __('Mask variable') }}
diff --git a/app/assets/javascripts/commit/pipelines/pipelines_table.vue b/app/assets/javascripts/commit/pipelines/pipelines_table.vue
index ca4d8da2482..e1cca5adc73 100644
--- a/app/assets/javascripts/commit/pipelines/pipelines_table.vue
+++ b/app/assets/javascripts/commit/pipelines/pipelines_table.vue
@@ -8,6 +8,7 @@ import PipelinesMixin from '~/pipelines/mixins/pipelines_mixin';
 import PipelinesService from '~/pipelines/services/pipelines_service';
 import PipelineStore from '~/pipelines/stores/pipelines_store';
 import TablePagination from '~/vue_shared/components/pagination/table_pagination.vue';
+import glFeatureFlagMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
 
 export default {
   components: {
@@ -19,7 +20,7 @@ export default {
     TablePagination,
     SvgBlankState,
   },
-  mixins: [PipelinesMixin],
+  mixins: [PipelinesMixin, glFeatureFlagMixin()],
   props: {
     endpoint: {
       type: String,
@@ -90,6 +91,9 @@ export default {
     canRenderPipelineButton() {
       return this.latestPipelineDetachedFlag;
     },
+    pipelineButtonClass() {
+      return !this.glFeatures.newPipelinesTable ? 'gl-md-display-none' : 'gl-lg-display-none';
+    },
     isForkMergeRequest() {
       return this.sourceProjectFullPath !== this.targetProjectFullPath;
     },
@@ -192,7 +196,8 @@ export default {
       <gl-button
         v-if="canRenderPipelineButton"
         block
-        class="gl-mt-3 gl-mb-3 gl-md-display-none"
+        class="gl-mt-3 gl-mb-3"
+        :class="pipelineButtonClass"
         variant="success"
         data-testid="run_pipeline_button_mobile"
         :loading="state.isRunningMergeRequestPipeline"
diff --git a/app/assets/javascripts/graphql_shared/fragments/epic.fragment.graphql b/app/assets/javascripts/graphql_shared/fragments/epic.fragment.graphql
index 286ebbd019e..b5b4ba4e772 100644
--- a/app/assets/javascripts/graphql_shared/fragments/epic.fragment.graphql
+++ b/app/assets/javascripts/graphql_shared/fragments/epic.fragment.graphql
@@ -4,6 +4,7 @@ fragment EpicNode on Epic {
   title
   state
   reference
+  webPath
   webUrl
   createdAt
   closedAt
diff --git a/app/assets/javascripts/ide/components/commit_sidebar/new_merge_request_option.vue b/app/assets/javascripts/ide/components/commit_sidebar/new_merge_request_option.vue
index 121dae4b87e..43bf2e1a90c 100644
--- a/app/assets/javascripts/ide/components/commit_sidebar/new_merge_request_option.vue
+++ b/app/assets/javascripts/ide/components/commit_sidebar/new_merge_request_option.vue
@@ -41,7 +41,6 @@ export default {
         :disabled="shouldDisableNewMrOption"
         :checked="shouldCreateMR"
         type="checkbox"
-        data-qa-selector="start_new_mr_checkbox"
         @change="toggleShouldCreateMR"
       />
       <span class="gl-ml-3 ide-option-label">
diff --git a/app/assets/javascripts/packages/details/store/getters.js b/app/assets/javascripts/packages/details/store/getters.js
index fd75d476b86..fb9b7d61fd2 100644
--- a/app/assets/javascripts/packages/details/store/getters.js
+++ b/app/assets/javascripts/packages/details/store/getters.js
@@ -122,8 +122,8 @@ export const gradleGroovyInstalCommand = ({ packageEntity }) => {
 
 export const gradleGroovyAddSourceCommand = ({ mavenPath }) =>
   // eslint-disable-next-line @gitlab/require-i18n-strings
-  `gitlab {
-  url "${mavenPath}"
+  `maven {
+  url '${mavenPath}'
 }`;
 
 export const groupExists = ({ groupListUrl }) => groupListUrl.length > 0;
diff --git a/app/assets/javascripts/pages/admin/projects/index/index.js b/app/assets/javascripts/pages/admin/projects/index/index.js
index 1971323abac..cc9a9b6cc38 100644
--- a/app/assets/javascripts/pages/admin/projects/index/index.js
+++ b/app/assets/javascripts/pages/admin/projects/index/index.js
@@ -6,7 +6,7 @@ import Translate from '~/vue_shared/translate';
 
 import deleteProjectModal from './components/delete_project_modal.vue';
 
-document.addEventListener('DOMContentLoaded', () => {
+(() => {
   Vue.use(Translate);
 
   const deleteProjectModalEl = document.getElementById('delete-project-modal');
@@ -39,4 +39,4 @@ document.addEventListener('DOMContentLoaded', () => {
       });
     },
   });
-});
+})();
diff --git a/app/assets/javascripts/pipelines/components/graph/graph_component.vue b/app/assets/javascripts/pipelines/components/graph/graph_component.vue
index fc0a8b07e7f..ec50253c939 100644
--- a/app/assets/javascripts/pipelines/components/graph/graph_component.vue
+++ b/app/assets/javascripts/pipelines/components/graph/graph_component.vue
@@ -106,8 +106,8 @@ export default {
         height: this.$refs[this.containerId].scrollHeight,
       };
     },
-    onError(errorType) {
-      this.$emit('error', errorType);
+    onError(payload) {
+      this.$emit('error', payload);
     },
     setJob(jobName) {
       this.hoveredJobName = jobName;
diff --git a/app/assets/javascripts/pipelines/components/graph/graph_component_wrapper.vue b/app/assets/javascripts/pipelines/components/graph/graph_component_wrapper.vue
index ed33a94af6e..962f2ca2a4c 100644
--- a/app/assets/javascripts/pipelines/components/graph/graph_component_wrapper.vue
+++ b/app/assets/javascripts/pipelines/components/graph/graph_component_wrapper.vue
@@ -73,7 +73,11 @@ export default {
         return unwrapPipelineData(this.pipelineProjectPath, data);
       },
       error(err) {
-        this.reportFailure(LOAD_FAILURE, serializeLoadErrors(err));
+        this.reportFailure({ type: LOAD_FAILURE, skipSentry: true });
+        reportToSentry(
+          this.$options.name,
+          `type: ${LOAD_FAILURE}, info: ${serializeLoadErrors(err)}`,
+        );
       },
       result({ error }) {
         /*
@@ -134,11 +138,15 @@ export default {
     refreshPipelineGraph() {
       this.$apollo.queries.pipeline.refetch();
     },
-    reportFailure(type, err = '') {
+    /* eslint-disable @gitlab/require-i18n-strings */
+    reportFailure({ type, err = 'No error string passed.', skipSentry = false }) {
       this.showAlert = true;
       this.alertType = type;
-      reportToSentry(this.$options.name, `type: ${this.alertType}, info: ${err}`);
+      if (!skipSentry) {
+        reportToSentry(this.$options.name, `type: ${type}, info: ${err}`);
+      }
     },
+    /* eslint-enable @gitlab/require-i18n-strings */
   },
 };
 </script>
diff --git a/app/assets/javascripts/pipelines/components/graph/linked_pipelines_column.vue b/app/assets/javascripts/pipelines/components/graph/linked_pipelines_column.vue
index 939400eb1c3..b55a77a3c4f 100644
--- a/app/assets/javascripts/pipelines/components/graph/linked_pipelines_column.vue
+++ b/app/assets/javascripts/pipelines/components/graph/linked_pipelines_column.vue
@@ -111,14 +111,12 @@ export default {
           this.loadingPipelineId = null;
           this.$emit('scrollContainer');
         },
-        error(err, _vm, _key, type) {
-          this.$emit('error', LOAD_FAILURE);
+        error(err) {
+          this.$emit('error', { type: LOAD_FAILURE, skipSentry: true });
 
           reportToSentry(
             'linked_pipelines_column',
-            `error type: ${LOAD_FAILURE}, error: ${serializeLoadErrors(
-              err,
-            )}, apollo error type: ${type}`,
+            `error type: ${LOAD_FAILURE}, error: ${serializeLoadErrors(err)}`,
           );
         },
       });
diff --git a/app/assets/javascripts/pipelines/components/graph_shared/links_inner.vue b/app/assets/javascripts/pipelines/components/graph_shared/links_inner.vue
index 84ca0bf1443..f4215d67292 100644
--- a/app/assets/javascripts/pipelines/components/graph_shared/links_inner.vue
+++ b/app/assets/javascripts/pipelines/components/graph_shared/links_inner.vue
@@ -170,7 +170,7 @@ export default {
         const parsedData = parseData(arrayOfJobs);
         this.links = generateLinksData(parsedData, this.containerId, `-${this.pipelineId}`);
       } catch (err) {
-        this.$emit('error', DRAW_FAILURE);
+        this.$emit('error', { type: DRAW_FAILURE, reportToSentry: false });
         reportToSentry(this.$options.name, err);
       }
       this.finishPerfMeasureAndSend();
diff --git a/app/assets/javascripts/pipelines/components/pipelines_list/time_ago.vue b/app/assets/javascripts/pipelines/components/pipelines_list/time_ago.vue
index 278089b6155..543bdf94307 100644
--- a/app/assets/javascripts/pipelines/components/pipelines_list/time_ago.vue
+++ b/app/assets/javascripts/pipelines/components/pipelines_list/time_ago.vue
@@ -48,6 +48,9 @@ export default {
     legacyTableMobileClass() {
       return !this.glFeatures.newPipelinesTable ? 'table-mobile-content' : '';
     },
+    showInProgress() {
+      return !this.duration && !this.finishedTime;
+    },
   },
 };
 </script>
@@ -57,6 +60,11 @@ export default {
       {{ s__('Pipeline|Duration') }}
     </div>
     <div :class="legacyTableMobileClass">
+      <span v-if="showInProgress" data-testid="pipeline-in-progress">
+        <gl-icon name="hourglass" class="gl-vertical-align-baseline! gl-mr-2" :size="12" />
+        {{ s__('Pipeline|In progress') }}
+      </span>
+
       <p v-if="duration" class="duration">
         <gl-icon name="timer" class="gl-vertical-align-baseline!" :size="12" />
         {{ durationFormatted }}
diff --git a/app/helpers/boards_helper.rb b/app/helpers/boards_helper.rb
index 73e7476b55d..b8c2255ab7e 100644
--- a/app/helpers/boards_helper.rb
+++ b/app/helpers/boards_helper.rb
@@ -18,7 +18,7 @@ module BoardsHelper
       time_tracking_limit_to_hours: Gitlab::CurrentSettings.time_tracking_limit_to_hours.to_s,
       recent_boards_endpoint: recent_boards_path,
       parent: current_board_parent.model_name.param_key,
-      group_id: @group&.id,
+      group_id: group_id,
       labels_filter_base_path: build_issue_link_base,
       labels_fetch_path: labels_fetch_path,
       labels_manage_path: labels_manage_path,
@@ -26,6 +26,12 @@ module BoardsHelper
     }
   end
 
+  def group_id
+    return @group.id if board.group_board?
+
+    @project&.group&.id
+  end
+
   def full_path
     if board.group_board?
       @group.full_path
diff --git a/app/views/admin/application_settings/_performance_bar.html.haml b/app/views/admin/application_settings/_performance_bar.html.haml
index 21345e4d80e..8f2bdd109cb 100644
--- a/app/views/admin/application_settings/_performance_bar.html.haml
+++ b/app/views/admin/application_settings/_performance_bar.html.haml
@@ -4,8 +4,8 @@
   %fieldset
     .form-group
       .form-check
-        = f.check_box :performance_bar_enabled, class: 'form-check-input'
-        = f.label :performance_bar_enabled, class: 'form-check-label qa-enable-performance-bar-checkbox' do
+        = f.check_box :performance_bar_enabled, class: 'form-check-input', data: { qa_selector: 'enable_performance_bar_checkbox'}
+        = f.label :performance_bar_enabled, class: 'form-check-label' do
           Enable access to the Performance Bar
     .form-group
       = f.label :performance_bar_allowed_group_path, 'Allowed group', class: 'label-bold'
diff --git a/app/views/projects/_new_project_fields.html.haml b/app/views/projects/_new_project_fields.html.haml
index f6b635173a5..8b1bf37ff10 100644
--- a/app/views/projects/_new_project_fields.html.haml
+++ b/app/views/projects/_new_project_fields.html.haml
@@ -55,7 +55,7 @@
     %div{ :class => "col-sm-12" }
       .form-check
         - experiment(:new_project_readme, actor: current_user) do |e|
-          = check_box_tag 'project[initialize_with_readme]', '1', e.run, class: 'form-check-input qa-initialize-with-readme-checkbox', data: { track_label: "#{track_label}", track_event: "activate_form_input", track_property: "init_with_readme", track_value: "" }
+          = check_box_tag 'project[initialize_with_readme]', '1', e.run, class: 'form-check-input', data: { qa_selector: "initialize_with_readme_checkbox", track_label: "#{track_label}", track_event: "activate_form_input", track_property: "init_with_readme", track_value: "" }
         = label_tag 'project[initialize_with_readme]', class: 'form-check-label' do
           .option-title
             %strong= s_('ProjectsNew|Initialize repository with a README')
diff --git a/app/views/projects/milestones/_form.html.haml b/app/views/projects/milestones/_form.html.haml
index f6e4442d4fb..56906eb6e66 100644
--- a/app/views/projects/milestones/_form.html.haml
+++ b/app/views/projects/milestones/_form.html.haml
@@ -21,8 +21,8 @@
 
   .form-actions
     - if @milestone.new_record?
-      = f.submit _('Create milestone'), class: 'gl-button btn-success btn', data: { qa_selector: 'create_milestone_button' }
-      = link_to _('Cancel'), project_milestones_path(@project), class: 'gl-button btn btn-cancel'
+      = f.submit _('Create milestone'), class: 'gl-button btn-confirm btn', data: { qa_selector: 'create_milestone_button' }
+      = link_to _('Cancel'), project_milestones_path(@project), class: 'gl-button btn btn-default btn-cancel'
     - else
-      = f.submit _('Save changes'), class: 'gl-button btn-success btn'
-      = link_to _('Cancel'), project_milestone_path(@project, @milestone), class: 'gl-button btn btn-cancel'
+      = f.submit _('Save changes'), class: 'gl-button btn-confirm btn'
+      = link_to _('Cancel'), project_milestone_path(@project, @milestone), class: 'gl-button btn btn-default btn-cancel'
diff --git a/app/views/projects/milestones/index.html.haml b/app/views/projects/milestones/index.html.haml
index c0df986e1ca..059ef53c42b 100644
--- a/app/views/projects/milestones/index.html.haml
+++ b/app/views/projects/milestones/index.html.haml
@@ -8,7 +8,7 @@
     = render 'shared/milestones/search_form'
     = render 'shared/milestones_sort_dropdown'
     - if can?(current_user, :admin_milestone, @project)
-      = link_to new_project_milestone_path(@project), class: 'gl-button btn btn-success', data: { qa_selector: "new_project_milestone_link" }, title: _('New milestone') do
+      = link_to new_project_milestone_path(@project), class: 'gl-button btn btn-confirm', data: { qa_selector: "new_project_milestone_link" }, title: _('New milestone') do
         = _('New milestone')
 
 - if @milestones.blank?
diff --git a/app/views/projects/mirrors/_mirror_repos.html.haml b/app/views/projects/mirrors/_mirror_repos.html.haml
index bcdc2988e49..5a1e263141d 100644
--- a/app/views/projects/mirrors/_mirror_repos.html.haml
+++ b/app/views/projects/mirrors/_mirror_repos.html.haml
@@ -35,7 +35,7 @@
                 = link_to _('Learn more.'), help_page_path('user/project/repository/repository_mirroring', anchor: 'mirror-only-protected-branches'), target: '_blank', rel: 'noopener noreferrer'
 
           .panel-footer
-            = f.submit _('Mirror repository'), class: 'gl-button btn btn-success js-mirror-submit qa-mirror-repository-button', name: :update_remote_mirror
+            = f.submit _('Mirror repository'), class: 'gl-button btn btn-confirm js-mirror-submit qa-mirror-repository-button', name: :update_remote_mirror
     - else
       .gl-alert.gl-alert-info{ role: 'alert' }
         = sprite_icon('information-o', css_class: 'gl-icon gl-alert-icon gl-alert-icon-no-title')
diff --git a/app/views/projects/pipelines/_with_tabs.html.haml b/app/views/projects/pipelines/_with_tabs.html.haml
index 904b3d6f483..58d125acc2d 100644
--- a/app/views/projects/pipelines/_with_tabs.html.haml
+++ b/app/views/projects/pipelines/_with_tabs.html.haml
@@ -56,7 +56,7 @@
             %tr.build-state.responsive-table-border-start
               %td.responsive-table-cell.ci-status-icon-failed{ data: { column: _('Status')} }
                 .d-none.d-md-block.build-icon
-                  = custom_icon("icon_status_#{build.status}")
+                  = sprite_icon("status_#{build.status}")
                 .d-md-none.build-badge
                   = render "ci/status/badge", link: false, status: job.detailed_status(current_user)
               %td.responsive-table-cell.build-name{ data: { column: _('Name')} }
diff --git a/app/views/shared/projects/_list.html.haml b/app/views/shared/projects/_list.html.haml
index 32b1af50a01..0210ed8c9b3 100644
--- a/app/views/shared/projects/_list.html.haml
+++ b/app/views/shared/projects/_list.html.haml
@@ -3,7 +3,6 @@
 - use_creator_avatar = false unless local_assigns[:use_creator_avatar] == true
 - stars = true unless local_assigns[:stars] == false
 - forks = true unless local_assigns[:forks] == false
-- merge_requests = true unless local_assigns[:merge_requests] == false
 - pipeline_status = true unless local_assigns[:pipeline_status] == false
 - skip_namespace = false unless local_assigns[:skip_namespace] == true
 - user = local_assigns[:user]
@@ -39,8 +38,9 @@
         - css_class = (i >= projects_limit) || project.pending_delete? ? 'hide' : nil
         = render "shared/projects/project", project: project, skip_namespace: skip_namespace,
           avatar: avatar, stars: stars, css_class: css_class, use_creator_avatar: use_creator_avatar,
-          forks: forks, show_last_commit_as_description: show_last_commit_as_description, user: user, merge_requests: merge_requests,
-          issues: project.issues_enabled?, pipeline_status: pipeline_status, compact_mode: compact_mode
+          forks: forks, show_last_commit_as_description: show_last_commit_as_description, user: user,
+          merge_requests: project.merge_requests_enabled?, issues: project.issues_enabled?,
+          pipeline_status: pipeline_status, compact_mode: compact_mode
     = paginate_collection(projects, remote: remote) unless skip_pagination
   - else
     - if @contributed_projects
diff --git a/changelogs/unreleased/263532-instrument-usage-ping-count-number-of-enabled-integrations-per-pro.yml b/changelogs/unreleased/263532-instrument-usage-ping-count-number-of-enabled-integrations-per-pro.yml
new file mode 100644
index 00000000000..d08f1a76fe2
--- /dev/null
+++ b/changelogs/unreleased/263532-instrument-usage-ping-count-number-of-enabled-integrations-per-pro.yml
@@ -0,0 +1,5 @@
+---
+title: 'Usage ping: Histogram for enabled integrations per project'
+merge_request: 55782
+author:
+type: added
diff --git a/changelogs/unreleased/btn-confirm-project-milestones.yml b/changelogs/unreleased/btn-confirm-project-milestones.yml
new file mode 100644
index 00000000000..b03e041f1a4
--- /dev/null
+++ b/changelogs/unreleased/btn-confirm-project-milestones.yml
@@ -0,0 +1,5 @@
+---
+title: Move from btn-success to btn-confirm in milestones directory
+merge_request: 56342
+author: Yogi (@yo)
+type: changed
diff --git a/changelogs/unreleased/btn-confirm-project-mirrors.yml b/changelogs/unreleased/btn-confirm-project-mirrors.yml
new file mode 100644
index 00000000000..9f847c6fdac
--- /dev/null
+++ b/changelogs/unreleased/btn-confirm-project-mirrors.yml
@@ -0,0 +1,5 @@
+---
+title: Move from btn-success to btn-confirm in mirrors directory
+merge_request: 56343
+author: Yogi (@yo)
+type: changed
diff --git a/changelogs/unreleased/cromefire_-master-patch-00495.yml b/changelogs/unreleased/cromefire_-master-patch-00495.yml
new file mode 100644
index 00000000000..e9a9f52ae69
--- /dev/null
+++ b/changelogs/unreleased/cromefire_-master-patch-00495.yml
@@ -0,0 +1,5 @@
+---
+title: Correct generated maven repository instruction for Gradle Groovy DSL
+merge_request: 56318
+author: Cromefire_ (@cromefire_)
+type: fixed
diff --git a/changelogs/unreleased/hide-mr-counts-in-project-list-where-mrs-disabled.yml b/changelogs/unreleased/hide-mr-counts-in-project-list-where-mrs-disabled.yml
new file mode 100644
index 00000000000..be9cfbdfecd
--- /dev/null
+++ b/changelogs/unreleased/hide-mr-counts-in-project-list-where-mrs-disabled.yml
@@ -0,0 +1,5 @@
+---
+title: Hide MR count and link in project list where MRs are disabled
+merge_request: !56432
+author: Simon Stieger @sim0
+type: fixed
diff --git a/changelogs/unreleased/pb-add-hourglass-icon-to-empty-duration-cell.yml b/changelogs/unreleased/pb-add-hourglass-icon-to-empty-duration-cell.yml
new file mode 100644
index 00000000000..f7fe185d7e3
--- /dev/null
+++ b/changelogs/unreleased/pb-add-hourglass-icon-to-empty-duration-cell.yml
@@ -0,0 +1,5 @@
+---
+title: Display in progress for pipeline duration cell when pipeline has not finished running
+merge_request: 56266
+author:
+type: changed
diff --git a/config/feature_flags/development/value_stream_analytics_extended_form.yml b/config/feature_flags/development/value_stream_analytics_extended_form.yml
index 1cdb9111af4..f74c85309c1 100644
--- a/config/feature_flags/development/value_stream_analytics_extended_form.yml
+++ b/config/feature_flags/development/value_stream_analytics_extended_form.yml
@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/294190
 milestone: '13.7'
 type: development
 group: group::optimize
-default_enabled: false
+default_enabled: true
diff --git a/config/metrics/counts_all/20210309165717_projects_with_enabled_alert_integrations_histogram.yml b/config/metrics/counts_all/20210309165717_projects_with_enabled_alert_integrations_histogram.yml
new file mode 100644
index 00000000000..6d393fad3a3
--- /dev/null
+++ b/config/metrics/counts_all/20210309165717_projects_with_enabled_alert_integrations_histogram.yml
@@ -0,0 +1,20 @@
+---
+key_path: usage_activity_by_stage.monitor.projects_with_enabled_alert_integrations_histogram
+description: Histogram (buckets 1 to 100) of projects with at least 1 enabled integration.
+product_section: ops
+product_stage: monitor
+product_group: group::monitor
+product_category: incident_management
+value_type: object
+status: data_available
+milestone: "13.10"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/55782
+time_frame: all
+data_source: database
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate
diff --git a/config/metrics/schema.json b/config/metrics/schema.json
index 73a7ee65dec..cc1eafcf0ba 100644
--- a/config/metrics/schema.json
+++ b/config/metrics/schema.json
@@ -22,7 +22,7 @@
     },
     "value_type": {
       "type": "string",
-      "enum": ["string", "number", "boolean"]
+      "enum": ["string", "number", "boolean", "object"]
     },
     "status": {
       "type": ["string"],
diff --git a/doc/ci/review_apps/index.md b/doc/ci/review_apps/index.md
index bd9a60e952c..122f9caebe7 100644
--- a/doc/ci/review_apps/index.md
+++ b/doc/ci/review_apps/index.md
@@ -286,8 +286,8 @@ The visual review tools retrieve the merge request ID from the `data-merge-reque
 data attribute included in the `script` HTML tag used to add the visual review tools
 to your review app.
 
-​After determining the ID for the merge request to link to a visual review app, you
-can supply the ID by either:​​
+After determining the ID for the merge request to link to a visual review app, you
+can supply the ID by either:
 
 - Hard-coding it in the script tag via the data attribute `data-merge-request-id` of the app.
 - Dynamically adding the `data-merge-request-id` value during the build of the app.
diff --git a/doc/development/cicd/templates.md b/doc/development/cicd/templates.md
index 3e7ae39cb7d..ed0d217c247 100644
--- a/doc/development/cicd/templates.md
+++ b/doc/development/cicd/templates.md
@@ -72,6 +72,10 @@ Please read [versioning](#versioning) section for introducing breaking change sa
   When a root `.gitlab-ci.yml` [includes](../../ci/yaml/README.md#include)
   multiple templates, these global keywords could be overridden by the
   others and cause an unexpected behavior.
+- Include [a changelog](../changelog.md) if your merge request introduces a user-facing change.
+- Use [`$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH`](../../ci/variables/predefined_variables.md)
+  instead of a hardcoded `main` branch, and never use `master`.
+- Use [`rules`](../../ci/yaml/README.md#rules) instead of [`only` or `except`](../../ci/yaml/README.md#onlyexcept-basic), if possible.
 
 ## Versioning
 
diff --git a/doc/development/usage_ping/dictionary.md b/doc/development/usage_ping/dictionary.md
index 32790c44249..8860f3d1abf 100644
--- a/doc/development/usage_ping/dictionary.md
+++ b/doc/development/usage_ping/dictionary.md
@@ -1028,6 +1028,18 @@ Status: `data_available`
 
 Tiers: `premium`, `ultimate`
 
+### `counts.geo_node_usage.git_fetch_event_count_weekly`
+
+Number of Git fetch events from Prometheus on the Geo secondary
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/config/metrics/counts_7d/20210309194425_git_fetch_event_count_weekly.yml)
+
+Group: `group::geo`
+
+Status: `implemented`
+
+Tiers: `premium`, `ultimate`
+
 ### `counts.geo_nodes`
 
 Total number of sites in a Geo deployment
@@ -14840,6 +14852,18 @@ Status: `data_available`
 
 Tiers: `free`
 
+### `usage_activity_by_stage.monitor.projects_with_enabled_alert_integrations_histogram`
+
+Histogram (buckets 1 to 100) of projects with at least 1 enabled integration.
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/counts_all/20210309165717_projects_with_enabled_alert_integrations_histogram.yml)
+
+Group: `group::monitor`
+
+Status: `data_available`
+
+Tiers: `free`, `premium`, `ultimate`
+
 ### `usage_activity_by_stage.monitor.projects_with_error_tracking_enabled`
 
 Projects where error tracking is enabled
diff --git a/doc/development/usage_ping/metrics_dictionary.md b/doc/development/usage_ping/metrics_dictionary.md
index 3f43aaa916f..3c08fb0cc87 100644
--- a/doc/development/usage_ping/metrics_dictionary.md
+++ b/doc/development/usage_ping/metrics_dictionary.md
@@ -32,7 +32,7 @@ Each metric is defined in a separate YAML file consisting of a number of fields:
 | `product_stage`     | no       | The [stage](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/stages.yml) for the metric. |
 | `product_group`     | yes      | The [group](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/stages.yml) that owns the metric. |
 | `product_category`  | no       | The [product category](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/categories.yml) for the metric. |
-| `value_type`        | yes      | `string`; one of `string`, `number`, `boolean`.                                                               |
+| `value_type`        | yes      | `string`; one of `string`, `number`, `boolean`, `object`.                                                     |
 | `status`            | yes      | `string`; status of the metric, may be set to `data_available`, `planned`, `in_progress`, `implemented`, `not_used`, `deprecated` |
 | `time_frame`        | yes      | `string`; may be set to a value like `7d`, `28d`, `all`, `none`. |
 | `data_source`       | yes      | `string`; may be set to a value like `database`, `redis`, `redis_hll`, `prometheus`, `ruby`. |
diff --git a/doc/development/value_stream_analytics.md b/doc/development/value_stream_analytics.md
index b3692bd1d2c..6b2442f1c32 100644
--- a/doc/development/value_stream_analytics.md
+++ b/doc/development/value_stream_analytics.md
@@ -90,7 +90,7 @@ Some start/end event pairs are not "compatible" with each other. For example:
 - "Issue closed" to "Issue closed": Duration is always 0.
 
 The `StageEvents` module describes the allowed `start_event` and `end_event` pairings (`PAIRING_RULES` constant). If a new event is added, it needs to be registered in this module.
-​To add a new event:​
+To add a new event:
 
 1. Add an entry in `ENUM_MAPPING` with a unique number, which is used in the `Stage` model as `enum`.
 1. Define which events are compatible with the event in the `PAIRING_RULES` hash.
@@ -190,9 +190,9 @@ Currently supported parents:
 ### Default stages
 
 The [original implementation](https://gitlab.com/gitlab-org/gitlab/-/issues/847) of value stream analytics defined 7 stages. These stages are always available for each parent, however altering these stages is not possible.
-​
+
 To make things efficient and reduce the number of records created, the default stages are expressed as in-memory objects (not persisted). When the user creates a custom stage for the first time, all the stages are persisted. This behavior is implemented in the value stream analytics service objects.
-​
+
 The reason for this was that we'd like to add the abilities to hide and order stages later on.
 
 ## Data Collector
diff --git a/doc/user/group/value_stream_analytics/img/delete_value_stream_v13.4.png b/doc/user/group/value_stream_analytics/img/delete_value_stream_v13_4.png
similarity index 100%
rename from doc/user/group/value_stream_analytics/img/delete_value_stream_v13.4.png
rename to doc/user/group/value_stream_analytics/img/delete_value_stream_v13_4.png
diff --git a/doc/user/group/value_stream_analytics/img/extended_value_stream_form_v13_10.png b/doc/user/group/value_stream_analytics/img/extended_value_stream_form_v13_10.png
new file mode 100644
index 00000000000..26508787177
Binary files /dev/null and b/doc/user/group/value_stream_analytics/img/extended_value_stream_form_v13_10.png differ
diff --git a/doc/user/group/value_stream_analytics/img/vsa_custom_stage_v13_10.png b/doc/user/group/value_stream_analytics/img/vsa_custom_stage_v13_10.png
new file mode 100644
index 00000000000..77f4a26b880
Binary files /dev/null and b/doc/user/group/value_stream_analytics/img/vsa_custom_stage_v13_10.png differ
diff --git a/doc/user/group/value_stream_analytics/img/vsa_default_stage_v13_10.png b/doc/user/group/value_stream_analytics/img/vsa_default_stage_v13_10.png
new file mode 100644
index 00000000000..1adb114b025
Binary files /dev/null and b/doc/user/group/value_stream_analytics/img/vsa_default_stage_v13_10.png differ
diff --git a/doc/user/group/value_stream_analytics/img/vsa_filter_bar_v13.3.png b/doc/user/group/value_stream_analytics/img/vsa_filter_bar_v13_3.png
similarity index 100%
rename from doc/user/group/value_stream_analytics/img/vsa_filter_bar_v13.3.png
rename to doc/user/group/value_stream_analytics/img/vsa_filter_bar_v13_3.png
diff --git a/doc/user/group/value_stream_analytics/index.md b/doc/user/group/value_stream_analytics/index.md
index 4fcef07a04e..52cf51d85a4 100644
--- a/doc/user/group/value_stream_analytics/index.md
+++ b/doc/user/group/value_stream_analytics/index.md
@@ -59,7 +59,7 @@ To filter results:
 1. Select a parameter to filter by.
 1. Select a value from the autocompleted results, or type to refine the results.
 
-![Value stream analytics filter bar](img/vsa_filter_bar_v13.3.png "Active filter bar for value stream analytics")
+![Value stream analytics filter bar](img/vsa_filter_bar_v13_3.png "Active filter bar for value stream analytics")
 
 ### Date ranges
 
@@ -299,10 +299,59 @@ To create a value stream:
 1. Navigate to your group's **Analytics > Value Stream**.
 1. Click the Value stream dropdown and select **Create new Value Stream**
 1. Fill in a name for the new Value Stream
+   - You can [customize the stages](#creating-a-value-stream-with-stages) as the `value_stream_analytics_extended_form` feature flag is enabled.
 1. Click the **Create Value Stream** button.
 
 ![New value stream](img/new_value_stream_v13_3.png "Creating a new value stream")
 
+#### Creating a value stream with stages
+
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/55572) in GitLab 13.10.
+> - It's [deployed behind a feature flag](../../feature_flags.md), enabled by default.
+> - It's enabled on GitLab.com.
+> - For GitLab self-managed instances, GitLab administrators can opt to [disable it](../../../administration/feature_flags.md). **(FREE SELF)**
+
+WARNING:
+This feature might not be available to you. Check the **version history** note above for details.
+
+You can create value streams with stages, starting with a default or a blank template. You can
+add stages as desired.
+
+To create a value stream with stages:
+
+1. Navigate to your group's **Analytics > Value Stream**.
+1. Find and select the Value Stream dropdown. Select **Create new Value Stream**.
+1. Select either **Create from default template** or **Create from no template**.
+   - Default stages in the value stream can be hidden or re-ordered
+     ![Default stage actions](img/vsa_default_stage_v13_10.png "Default stage actions")
+   - New stages can be added by clicking the 'Add another stage' button
+   - The name, start and end events for the stage can be selected
+     ![Custom stage actions](img/vsa_custom_stage_v13_10.png "Custom stage actions")
+1. Select the **Create Value Stream** button to save the value stream.
+
+![Extended create value stream form](img/extended_value_stream_form_v13_10.png "Extended create value stream form")
+
+#### Enable or disable value stream with stages
+
+Value streams with stages is under development but ready for production use.
+It is deployed behind a feature flag that is **enabled by default**.
+[GitLab administrators with access to the GitLab Rails console](../../../administration/feature_flags.md)
+can opt to disable it.
+
+To enable it:
+
+```ruby
+# For the instance
+Feature.enable(:value_stream_analytics_extended_form)
+```
+
+To disable it:
+
+```ruby
+# For the instance
+Feature.disable(:value_stream_analytics_extended_form)
+```
+
 ### Deleting a value stream
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/221205) in GitLab 13.4.
@@ -314,7 +363,7 @@ To delete a custom value stream:
 1. Click the **Delete (name of value stream)**.
 1. Click the **Delete** button to confirm.
 
-![Delete value stream](img/delete_value_stream_v13.4.png "Deleting a custom value stream")
+![Delete value stream](img/delete_value_stream_v13_4.png "Deleting a custom value stream")
 
 ## Days to completion chart
 
diff --git a/doc/user/packages/dependency_proxy/index.md b/doc/user/packages/dependency_proxy/index.md
index ce0b6fcaddd..ad2d2ac2a8e 100644
--- a/doc/user/packages/dependency_proxy/index.md
+++ b/doc/user/packages/dependency_proxy/index.md
@@ -95,9 +95,11 @@ Runners log in to the Dependency Proxy automatically. To pull through
 the Dependency Proxy, use the `CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX`
 [predefined CI/CD variable](../../../ci/variables/predefined_variables.md):
 
+Example pulling the latest alpine image:
+
 ```yaml
 # .gitlab-ci.yml
-image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/node:latest
+image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/alpine:latest
 ```
 
 There are other additional predefined CI/CD variables you can also use:
@@ -125,13 +127,20 @@ To store a Docker image in Dependency Proxy storage:
 1. Go to your group's **Packages & Registries > Dependency Proxy**.
 1. Copy the **Dependency Proxy URL**.
 1. Use one of these commands. In these examples, the image is `alpine:latest`.
+1. You can also pull images by digest to specify exactly which version of an image to pull.
 
-   - Add the URL to your [`.gitlab-ci.yml`](../../../ci/yaml/README.md#image) file:
+   - Pull an image by tag by adding the image to your [`.gitlab-ci.yml`](../../../ci/yaml/README.md#image) file:
 
      ```shell
      image: gitlab.example.com/groupname/dependency_proxy/containers/alpine:latest
      ```
 
+   - Pull an image by digest by adding the image to your [`.gitlab-ci.yml`](../../../ci/yaml/README.md#image) file:
+
+     ```shell
+     image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/alpine@sha256:c9375e662992791e3f39e919b26f510e5254b42792519c180aad254e6b38f4dc
+     ```
+
    - Manually pull the Docker image:
 
      ```shell
diff --git a/lib/api/groups.rb b/lib/api/groups.rb
index a8b1cdab021..26fa00d6186 100644
--- a/lib/api/groups.rb
+++ b/lib/api/groups.rb
@@ -137,6 +137,10 @@ module API
         end
       end
       # rubocop: enable CodeReuse/ActiveRecord
+
+      def authorize_group_creation!
+        authorize! :create_group
+      end
     end
 
     resource :groups do
@@ -169,7 +173,7 @@ module API
         if parent_group
           authorize! :create_subgroup, parent_group
         else
-          authorize! :create_group
+          authorize_group_creation!
         end
 
         group = create_group
diff --git a/lib/gitlab/usage_data.rb b/lib/gitlab/usage_data.rb
index 0d9b76f3d34..5dc3f71329d 100644
--- a/lib/gitlab/usage_data.rb
+++ b/lib/gitlab/usage_data.rb
@@ -629,6 +629,9 @@ module Gitlab
 
       # rubocop: disable CodeReuse/ActiveRecord
       def usage_activity_by_stage_monitor(time_period)
+        # Calculate histogram only for overall as other time periods aren't available/useful here.
+        integrations_histogram = time_period.empty? ? histogram(::AlertManagement::HttpIntegration.active, :project_id, buckets: 1..100) : nil
+
         {
           clusters: distinct_count(::Clusters::Cluster.where(time_period), :user_id),
           clusters_applications_prometheus: cluster_applications_user_distinct_count(::Clusters::Applications::Prometheus, time_period),
@@ -638,8 +641,9 @@ module Gitlab
           projects_with_tracing_enabled: distinct_count(::Project.with_tracing_enabled.where(time_period), :creator_id),
           projects_with_error_tracking_enabled: distinct_count(::Project.with_enabled_error_tracking.where(time_period), :creator_id),
           projects_with_incidents: distinct_count(::Issue.incident.where(time_period), :project_id),
-          projects_with_alert_incidents: distinct_count(::Issue.incident.with_alert_management_alerts.where(time_period), :project_id)
-        }
+          projects_with_alert_incidents: distinct_count(::Issue.incident.with_alert_management_alerts.where(time_period), :project_id),
+          projects_with_enabled_alert_integrations_histogram: integrations_histogram
+        }.compact
       end
       # rubocop: enable CodeReuse/ActiveRecord
 
diff --git a/lib/gitlab/utils/usage_data.rb b/lib/gitlab/utils/usage_data.rb
index 005da0f9642..854fc5c917d 100644
--- a/lib/gitlab/utils/usage_data.rb
+++ b/lib/gitlab/utils/usage_data.rb
@@ -39,10 +39,12 @@ module Gitlab
       extend self
 
       FALLBACK = -1
+      HISTOGRAM_FALLBACK = { '-1' => -1 }.freeze
       DISTRIBUTED_HLL_FALLBACK = -2
       ALL_TIME_TIME_FRAME_NAME = "all"
       SEVEN_DAYS_TIME_FRAME_NAME = "7d"
       TWENTY_EIGHT_DAYS_TIME_FRAME_NAME = "28d"
+      MAX_BUCKET_SIZE = 100
 
       def count(relation, column = nil, batch: true, batch_size: nil, start: nil, finish: nil)
         if batch
@@ -87,6 +89,73 @@ module Gitlab
         FALLBACK
       end
 
+      # We don't support batching with histograms.
+      # Please avoid using this method on large tables.
+      # See https://gitlab.com/gitlab-org/gitlab/-/issues/323949.
+      #
+      # rubocop: disable CodeReuse/ActiveRecord
+      def histogram(relation, column, buckets:, bucket_size: buckets.size)
+        # Using lambda to avoid exposing histogram specific methods
+        parameters_valid = lambda do
+          error_message =
+            if buckets.first == buckets.last
+              'Lower bucket bound cannot equal to upper bucket bound'
+            elsif bucket_size == 0
+              'Bucket size cannot be zero'
+            elsif bucket_size > MAX_BUCKET_SIZE
+              "Bucket size #{bucket_size} exceeds the limit of #{MAX_BUCKET_SIZE}"
+            end
+
+          return true unless error_message
+
+          exception = ArgumentError.new(error_message)
+          exception.set_backtrace(caller)
+          Gitlab::ErrorTracking.track_and_raise_for_dev_exception(exception)
+
+          false
+        end
+
+        return HISTOGRAM_FALLBACK unless parameters_valid.call
+
+        count_grouped = relation.group(column).select(Arel.star.count.as('count_grouped'))
+        cte = Gitlab::SQL::CTE.new(:count_cte, count_grouped)
+
+        # For example, 9 segements gives 10 buckets
+        bucket_segments = bucket_size - 1
+
+        width_bucket = Arel::Nodes::NamedFunction
+          .new('WIDTH_BUCKET', [cte.table[:count_grouped], buckets.first, buckets.last, bucket_segments])
+          .as('buckets')
+
+        query = cte
+          .table
+          .project(width_bucket, cte.table[:count])
+          .group('buckets')
+          .order('buckets')
+          .with(cte.to_arel)
+
+        # Return the histogram as a Hash because buckets are unique.
+        relation
+          .connection
+          .exec_query(query.to_sql)
+          .rows
+          .to_h
+          # Keys are converted to strings in Usage Ping JSON
+          .stringify_keys
+      rescue ActiveRecord::StatementInvalid => e
+        Gitlab::AppJsonLogger.error(
+          event: 'histogram',
+          relation: relation.table_name,
+          operation: 'histogram',
+          operation_args: [column, buckets.first, buckets.last, bucket_segments],
+          query: query.to_sql,
+          message: e.message
+        )
+
+        HISTOGRAM_FALLBACK
+      end
+      # rubocop: enable CodeReuse/ActiveRecord
+
       def add(*args)
         return -1 if args.any?(&:negative?)
 
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 53ba4f7ba29..be8ecd13ecb 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -9637,6 +9637,15 @@ msgstr ""
 msgid "DastProfiles|The maximum number of seconds allowed for the site under test to respond to a request."
 msgstr ""
 
+msgid "DastProfiles|This profile is currently being used in a policy."
+msgstr ""
+
+msgid "DastProfiles|This scanner profile is currently being used by a policy. To make edits you must remove it from the active policy."
+msgstr ""
+
+msgid "DastProfiles|This site profile is currently being used by a policy. To make edits you must remove it from the active policy."
+msgstr ""
+
 msgid "DastProfiles|Turn on AJAX spider"
 msgstr ""
 
@@ -22501,6 +22510,9 @@ msgstr ""
 msgid "Pipeline|Failed"
 msgstr ""
 
+msgid "Pipeline|In progress"
+msgstr ""
+
 msgid "Pipeline|Key"
 msgstr ""
 
diff --git a/package.json b/package.json
index 56b54b74047..27d7d711fb8 100644
--- a/package.json
+++ b/package.json
@@ -96,7 +96,7 @@
     "deckar01-task_list": "^2.3.1",
     "diff": "^3.4.0",
     "document-register-element": "1.14.3",
-    "dompurify": "^2.2.6",
+    "dompurify": "^2.2.7",
     "dropzone": "^4.2.0",
     "editorconfig": "^0.15.3",
     "emoji-regex": "^7.0.3",
diff --git a/qa/qa/page/admin/settings/component/ip_limits.rb b/qa/qa/page/admin/settings/component/ip_limits.rb
index 9db2ae8ba58..1f9bd113cab 100644
--- a/qa/qa/page/admin/settings/component/ip_limits.rb
+++ b/qa/qa/page/admin/settings/component/ip_limits.rb
@@ -14,9 +14,9 @@ module QA
             end
 
             def enable_throttles
-              check_element :throttle_unauthenticated_checkbox
-              check_element :throttle_authenticated_api_checkbox
-              check_element :throttle_authenticated_web_checkbox
+              check_element(:throttle_unauthenticated_checkbox)
+              check_element(:throttle_authenticated_api_checkbox)
+              check_element(:throttle_authenticated_web_checkbox)
             end
 
             def save_settings
diff --git a/qa/qa/page/admin/settings/component/outbound_requests.rb b/qa/qa/page/admin/settings/component/outbound_requests.rb
index 248ea5b6715..c812c05f9c1 100644
--- a/qa/qa/page/admin/settings/component/outbound_requests.rb
+++ b/qa/qa/page/admin/settings/component/outbound_requests.rb
@@ -19,7 +19,7 @@ module QA
             private
 
             def check_allow_requests_to_local_network_from_services_checkbox
-              check_element :allow_requests_from_services_checkbox
+              check_element(:allow_requests_from_services_checkbox)
             end
 
             def click_save_changes_button
diff --git a/qa/qa/page/admin/settings/component/performance_bar.rb b/qa/qa/page/admin/settings/component/performance_bar.rb
index bc29efb64c0..9e92fa362fb 100644
--- a/qa/qa/page/admin/settings/component/performance_bar.rb
+++ b/qa/qa/page/admin/settings/component/performance_bar.rb
@@ -12,7 +12,7 @@ module QA
             end
 
             def enable_performance_bar
-              click_element :enable_performance_bar_checkbox
+              check_element(:enable_performance_bar_checkbox)
               Capybara.current_session.driver.browser.manage.add_cookie(name: 'perf_bar_enabled', value: 'true')
             end
 
diff --git a/qa/qa/page/admin/settings/component/sign_up_restrictions.rb b/qa/qa/page/admin/settings/component/sign_up_restrictions.rb
index 9526faf4126..9909155641f 100644
--- a/qa/qa/page/admin/settings/component/sign_up_restrictions.rb
+++ b/qa/qa/page/admin/settings/component/sign_up_restrictions.rb
@@ -13,13 +13,13 @@ module QA
             end
 
             def require_admin_approval_after_user_signup
-              check_element :require_admin_approval_after_user_signup_checkbox
-              click_element :save_changes_button
+              check_element(:require_admin_approval_after_user_signup_checkbox)
+              click_element(:save_changes_button)
             end
 
             def disable_signups
-              uncheck_element :signup_enabled_checkbox
-              click_element :save_changes_button
+              uncheck_element(:signup_enabled_checkbox)
+              click_element(:save_changes_button)
             end
           end
         end
diff --git a/qa/qa/page/base.rb b/qa/qa/page/base.rb
index 99f73bbba48..d1b556b58fb 100644
--- a/qa/qa/page/base.rb
+++ b/qa/qa/page/base.rb
@@ -133,9 +133,15 @@ module QA
       end
 
       def check_element(name)
+        if find_element(name, visible: false).checked?
+          QA::Runtime::Logger.debug("#{name} is already checked")
+
+          return
+        end
+
         retry_until(sleep_interval: 1) do
-          find_element(name).set(true)
-          checked = find_element(name).checked?
+          find_element(name, visible: false).click
+          checked = find_element(name, visible: false).checked?
 
           QA::Runtime::Logger.debug(checked ? "#{name} was checked" : "#{name} was not checked")
 
@@ -144,10 +150,19 @@ module QA
       end
 
       def uncheck_element(name)
-        retry_until(sleep_interval: 1) do
-          find_element(name).set(false)
+        unless find_element(name, visible: false).checked?
+          QA::Runtime::Logger.debug("#{name} is already unchecked")
 
-          !find_element(name).checked?
+          return
+        end
+
+        retry_until(sleep_interval: 1) do
+          find_element(name, visible: false).click
+          unchecked = !find_element(name, visible: false).checked?
+
+          QA::Runtime::Logger.debug(unchecked ? "#{name} was unchecked" : "#{name} was not unchecked")
+
+          unchecked
         end
       end
 
diff --git a/qa/qa/page/group/settings/general.rb b/qa/qa/page/group/settings/general.rb
index 8f5267c3362..ced8bd5c812 100644
--- a/qa/qa/page/group/settings/general.rb
+++ b/qa/qa/page/group/settings/general.rb
@@ -54,57 +54,57 @@ module QA
           end
 
           def set_lfs_enabled
-            expand_content :permission_lfs_2fa_content
-            check_element :lfs_checkbox
-            click_element :save_permissions_changes_button
+            expand_content(:permission_lfs_2fa_content)
+            check_element(:lfs_checkbox)
+            click_element(:save_permissions_changes_button)
           end
 
           def set_lfs_disabled
-            expand_content :permission_lfs_2fa_content
-            uncheck_element :lfs_checkbox
-            click_element :save_permissions_changes_button
+            expand_content(:permission_lfs_2fa_content)
+            uncheck_element(:lfs_checkbox)
+            click_element(:save_permissions_changes_button)
           end
 
           def set_request_access_enabled
-            expand_content :permission_lfs_2fa_content
-            check_element :request_access_checkbox
-            click_element :save_permissions_changes_button
+            expand_content(:permission_lfs_2fa_content)
+            check_element(:request_access_checkbox)
+            click_element(:save_permissions_changes_button)
           end
 
           def set_request_access_disabled
-            expand_content :permission_lfs_2fa_content
-            uncheck_element :request_access_checkbox
-            click_element :save_permissions_changes_button
+            expand_content(:permission_lfs_2fa_content)
+            uncheck_element(:request_access_checkbox)
+            click_element(:save_permissions_changes_button)
           end
 
           def set_require_2fa_enabled
-            expand_content :permission_lfs_2fa_content
-            check_element :require_2fa_checkbox
-            click_element :save_permissions_changes_button
+            expand_content(:permission_lfs_2fa_content)
+            check_element(:require_2fa_checkbox)
+            click_element(:save_permissions_changes_button)
           end
 
           def set_require_2fa_disabled
-            expand_content :permission_lfs_2fa_content
-            uncheck_element :require_2fa_checkbox
-            click_element :save_permissions_changes_button
+            expand_content(:permission_lfs_2fa_content)
+            uncheck_element(:require_2fa_checkbox)
+            click_element(:save_permissions_changes_button)
           end
 
           def set_project_creation_level(value)
-            expand_content :permission_lfs_2fa_content
+            expand_content(:permission_lfs_2fa_content)
             select_element(:project_creation_level_dropdown, value)
-            click_element :save_permissions_changes_button
+            click_element(:save_permissions_changes_button)
           end
 
           def toggle_request_access
-            expand_content :permission_lfs_2fa_content
+            expand_content(:permission_lfs_2fa_content)
 
             if find_element(:request_access_checkbox).checked?
-              uncheck_element :request_access_checkbox
+              uncheck_element(:request_access_checkbox)
             else
-              check_element :request_access_checkbox
+              check_element(:request_access_checkbox)
             end
 
-            click_element :save_permissions_changes_button
+            click_element(:save_permissions_changes_button)
           end
         end
       end
diff --git a/qa/qa/page/merge_request/show.rb b/qa/qa/page/merge_request/show.rb
index 056942d0eaf..89b6effcad7 100644
--- a/qa/qa/page/merge_request/show.rb
+++ b/qa/qa/page/merge_request/show.rb
@@ -228,6 +228,7 @@ module QA
             !find_element(:squash_checkbox).disabled?
           end
 
+          # TODO: Fix workaround for data-qa-selector failure
           click_element(:squash_checkbox)
         end
 
diff --git a/qa/qa/page/project/new.rb b/qa/qa/page/project/new.rb
index 7e296528795..d1033dbfca9 100644
--- a/qa/qa/page/project/new.rb
+++ b/qa/qa/page/project/new.rb
@@ -68,7 +68,7 @@ module QA
         end
 
         def enable_initialize_with_readme
-          check_element :initialize_with_readme_checkbox
+          check_element(:initialize_with_readme_checkbox)
         end
       end
     end
diff --git a/qa/qa/page/project/operations/kubernetes/add_existing.rb b/qa/qa/page/project/operations/kubernetes/add_existing.rb
index 1b9a451c47d..59f59ca9966 100644
--- a/qa/qa/page/project/operations/kubernetes/add_existing.rb
+++ b/qa/qa/page/project/operations/kubernetes/add_existing.rb
@@ -36,7 +36,7 @@ module QA
             end
 
             def uncheck_rbac!
-              uncheck_element :rbac_checkbox
+              uncheck_element(:rbac_checkbox)
             end
           end
         end
diff --git a/qa/qa/page/project/settings/auto_devops.rb b/qa/qa/page/project/settings/auto_devops.rb
index 827d5b072c3..9dffa010805 100644
--- a/qa/qa/page/project/settings/auto_devops.rb
+++ b/qa/qa/page/project/settings/auto_devops.rb
@@ -11,8 +11,8 @@ module QA
           end
 
           def enable_autodevops
-            check_element :enable_autodevops_checkbox
-            click_element :save_changes_button
+            check_element(:enable_autodevops_checkbox)
+            click_element(:save_changes_button)
           end
         end
       end
diff --git a/qa/qa/page/project/settings/ci_variables.rb b/qa/qa/page/project/settings/ci_variables.rb
index f2ced668a60..2b8fad64afb 100644
--- a/qa/qa/page/project/settings/ci_variables.rb
+++ b/qa/qa/page/project/settings/ci_variables.rb
@@ -10,7 +10,6 @@ module QA
           view 'app/assets/javascripts/ci_variable_list/components/ci_variable_modal.vue' do
             element :ci_variable_key_field
             element :ci_variable_value_field
-            element :ci_variable_masked_checkbox
             element :ci_variable_save_button
             element :ci_variable_delete_button
           end
diff --git a/qa/qa/page/project/settings/incidents.rb b/qa/qa/page/project/settings/incidents.rb
index 9b523e2aa9e..610129851d9 100644
--- a/qa/qa/page/project/settings/incidents.rb
+++ b/qa/qa/page/project/settings/incidents.rb
@@ -13,7 +13,7 @@ module QA
           end
 
           def enable_issues_for_incidents
-            check_element :create_issue_checkbox
+            check_element(:create_issue_checkbox)
           end
 
           def select_issue_template(template)
diff --git a/qa/qa/page/project/settings/merge_request.rb b/qa/qa/page/project/settings/merge_request.rb
index 34754124931..fe5d629effe 100644
--- a/qa/qa/page/project/settings/merge_request.rb
+++ b/qa/qa/page/project/settings/merge_request.rb
@@ -29,7 +29,7 @@ module QA
           end
 
           def enable_merge_if_all_disscussions_are_resolved
-            click_element :allow_merge_if_all_discussions_are_resolved_checkbox
+            check_element(:allow_merge_if_all_discussions_are_resolved_checkbox)
             click_save_changes
           end
         end
diff --git a/qa/qa/page/project/web_ide/edit.rb b/qa/qa/page/project/web_ide/edit.rb
index 45c46004790..fd68ac0de16 100644
--- a/qa/qa/page/project/web_ide/edit.rb
+++ b/qa/qa/page/project/web_ide/edit.rb
@@ -44,10 +44,6 @@ module QA
             element :commit_button
           end
 
-          view 'app/assets/javascripts/ide/components/commit_sidebar/new_merge_request_option.vue' do
-            element :start_new_mr_checkbox
-          end
-
           view 'app/assets/javascripts/ide/components/repo_editor.vue' do
             element :editor_container
           end
diff --git a/rubocop/rubocop-usage-data.yml b/rubocop/rubocop-usage-data.yml
index d0dd6a2e4da..a03f21e491a 100644
--- a/rubocop/rubocop-usage-data.yml
+++ b/rubocop/rubocop-usage-data.yml
@@ -34,6 +34,7 @@ UsageData/LargeTable:
   CountMethods:
     - :count
     - :distinct_count
+    - :histogram
   AllowedMethods:
     - :arel_table
     - :minimum
diff --git a/scripts/lint-doc.sh b/scripts/lint-doc.sh
index c94faa8f6f4..4d0c1ba99d2 100755
--- a/scripts/lint-doc.sh
+++ b/scripts/lint-doc.sh
@@ -30,13 +30,13 @@ then
   ((ERRORCODE++))
 fi
 
-# Test for non-standard spaces (NBSP, NNBSP) in documentation.
+# Test for non-standard spaces (NBSP, NNBSP, ZWSP) in documentation.
 echo '=> Checking for non-standard spaces...'
 echo
-grep --extended-regexp --binary-file=without-match --recursive '[  ]' doc/ >/dev/null 2>&1
+grep --extended-regexp --binary-file=without-match --recursive '[  ​]' doc/ >/dev/null 2>&1
 if [ $? -eq 0 ]
 then
-  echo '✖ ERROR: Non-standard spaces (NBSP, NNBSP) should not be used in documentation.
+  echo '✖ ERROR: Non-standard spaces (NBSP, NNBSP, ZWSP) should not be used in documentation.
          https://docs.gitlab.com/ee/development/documentation/styleguide/index.html#spaces-between-words
          Replace with standard spaces:' >&2
   # Find the spaces, then add color codes with sed to highlight each NBSP or NNBSP in the output.
diff --git a/spec/frontend/packages/details/store/getters_spec.js b/spec/frontend/packages/details/store/getters_spec.js
index fa7123c813d..f12b75d3b70 100644
--- a/spec/frontend/packages/details/store/getters_spec.js
+++ b/spec/frontend/packages/details/store/getters_spec.js
@@ -250,8 +250,8 @@ describe('Getters PackageDetails Store', () => {
       setupState();
 
       expect(gradleGroovyAddSourceCommand(state)).toMatchInlineSnapshot(`
-        "gitlab {
-          url \\"foo/registry\\"
+        "maven {
+          url 'foo/registry'
         }"
       `);
     });
diff --git a/spec/frontend/pipelines/graph/linked_pipelines_column_spec.js b/spec/frontend/pipelines/graph/linked_pipelines_column_spec.js
index edeab883e91..4c72dad735e 100644
--- a/spec/frontend/pipelines/graph/linked_pipelines_column_spec.js
+++ b/spec/frontend/pipelines/graph/linked_pipelines_column_spec.js
@@ -116,7 +116,7 @@ describe('Linked Pipelines Column', () => {
 
         it('emits the error', async () => {
           await clickExpandButton();
-          expect(wrapper.emitted().error).toEqual([[LOAD_FAILURE]]);
+          expect(wrapper.emitted().error).toEqual([[{ type: LOAD_FAILURE, skipSentry: true }]]);
         });
 
         it('does not show the pipeline', async () => {
@@ -167,7 +167,7 @@ describe('Linked Pipelines Column', () => {
 
         it('emits the error', async () => {
           await clickExpandButton();
-          expect(wrapper.emitted().error).toEqual([[LOAD_FAILURE]]);
+          expect(wrapper.emitted().error).toEqual([[{ type: LOAD_FAILURE, skipSentry: true }]]);
         });
 
         it('does not show the pipeline', async () => {
diff --git a/spec/frontend/pipelines/time_ago_spec.js b/spec/frontend/pipelines/time_ago_spec.js
index 4919efbb4c6..93aeb049434 100644
--- a/spec/frontend/pipelines/time_ago_spec.js
+++ b/spec/frontend/pipelines/time_ago_spec.js
@@ -29,6 +29,7 @@ describe('Timeago component', () => {
 
   const duration = () => wrapper.find('.duration');
   const finishedAt = () => wrapper.find('.finished-at');
+  const findInProgress = () => wrapper.find('[data-testid="pipeline-in-progress"]');
 
   describe('with duration', () => {
     beforeEach(() => {
@@ -77,4 +78,21 @@ describe('Timeago component', () => {
       expect(finishedAt().exists()).toBe(false);
     });
   });
+
+  describe('in progress', () => {
+    it.each`
+      durationTime | finishedAtTime                | shouldShow
+      ${10}        | ${'2017-04-26T12:40:23.277Z'} | ${false}
+      ${10}        | ${''}                         | ${false}
+      ${0}         | ${'2017-04-26T12:40:23.277Z'} | ${false}
+      ${0}         | ${''}                         | ${true}
+    `(
+      'progress state shown: $shouldShow when pipeline duration is $durationTime and finished_at is $finishedAtTime',
+      ({ durationTime, finishedAtTime, shouldShow }) => {
+        createComponent({ duration: durationTime, finished_at: finishedAtTime });
+
+        expect(findInProgress().exists()).toBe(shouldShow);
+      },
+    );
+  });
 });
diff --git a/spec/frontend/vue_mr_widget/components/mr_widget_related_links_spec.js b/spec/frontend/vue_mr_widget/components/mr_widget_related_links_spec.js
index a33401c5ba9..a879b06e858 100644
--- a/spec/frontend/vue_mr_widget/components/mr_widget_related_links_spec.js
+++ b/spec/frontend/vue_mr_widget/components/mr_widget_related_links_spec.js
@@ -1,85 +1,88 @@
-import Vue from 'vue';
-import mountComponent from 'helpers/vue_mount_component_helper';
-import relatedLinksComponent from '~/vue_merge_request_widget/components/mr_widget_related_links.vue';
+import { shallowMount } from '@vue/test-utils';
+import RelatedLinks from '~/vue_merge_request_widget/components/mr_widget_related_links.vue';
 
 describe('MRWidgetRelatedLinks', () => {
-  let vm;
+  let wrapper;
 
-  const createComponent = (data) => {
-    const Component = Vue.extend(relatedLinksComponent);
-
-    return mountComponent(Component, data);
+  const createComponent = (propsData = {}) => {
+    wrapper = shallowMount(RelatedLinks, { propsData });
   };
 
   afterEach(() => {
-    vm.$destroy();
+    wrapper.destroy();
   });
 
   describe('computed', () => {
     describe('closesText', () => {
       it('returns Closes text for open merge request', () => {
-        vm = createComponent({ state: 'open', relatedLinks: {} });
+        createComponent({ state: 'open', relatedLinks: {} });
 
-        expect(vm.closesText).toEqual('Closes');
+        expect(wrapper.vm.closesText).toBe('Closes');
       });
 
       it('returns correct text for closed merge request', () => {
-        vm = createComponent({ state: 'closed', relatedLinks: {} });
+        createComponent({ state: 'closed', relatedLinks: {} });
 
-        expect(vm.closesText).toEqual('Did not close');
+        expect(wrapper.vm.closesText).toBe('Did not close');
       });
 
       it('returns correct tense for merged request', () => {
-        vm = createComponent({ state: 'merged', relatedLinks: {} });
+        createComponent({ state: 'merged', relatedLinks: {} });
 
-        expect(vm.closesText).toEqual('Closed');
+        expect(wrapper.vm.closesText).toBe('Closed');
       });
     });
   });
 
   it('should have only have closing issues text', () => {
-    vm = createComponent({
+    createComponent({
       relatedLinks: {
         closing: '<a href="#">#23</a> and <a>#42</a>',
       },
     });
-    const content = vm.$el.textContent.replace(/\n(\s)+/g, ' ').trim();
+    const content = wrapper
+      .text()
+      .replace(/\n(\s)+/g, ' ')
+      .trim();
 
     expect(content).toContain('Closes #23 and #42');
     expect(content).not.toContain('Mentions');
   });
 
   it('should have only have mentioned issues text', () => {
-    vm = createComponent({
+    createComponent({
       relatedLinks: {
         mentioned: '<a href="#">#7</a>',
       },
     });
 
-    expect(vm.$el.innerText).toContain('Mentions #7');
-    expect(vm.$el.innerText).not.toContain('Closes');
+    expect(wrapper.text().trim()).toContain('Mentions #7');
+    expect(wrapper.text().trim()).not.toContain('Closes');
   });
 
   it('should have closing and mentioned issues at the same time', () => {
-    vm = createComponent({
+    createComponent({
       relatedLinks: {
         closing: '<a href="#">#7</a>',
         mentioned: '<a href="#">#23</a> and <a>#42</a>',
       },
     });
-    const content = vm.$el.textContent.replace(/\n(\s)+/g, ' ').trim();
+    const content = wrapper
+      .text()
+      .replace(/\n(\s)+/g, ' ')
+      .trim();
 
     expect(content).toContain('Closes #7');
     expect(content).toContain('Mentions #23 and #42');
   });
 
   it('should have assing issues link', () => {
-    vm = createComponent({
+    createComponent({
       relatedLinks: {
         assignToMe: '<a href="#">Assign yourself to these issues</a>',
       },
     });
 
-    expect(vm.$el.innerText).toContain('Assign yourself to these issues');
+    expect(wrapper.text().trim()).toContain('Assign yourself to these issues');
   });
 });
diff --git a/spec/helpers/boards_helper_spec.rb b/spec/helpers/boards_helper_spec.rb
index 83aad206547..b00ee19cea2 100644
--- a/spec/helpers/boards_helper_spec.rb
+++ b/spec/helpers/boards_helper_spec.rb
@@ -4,8 +4,8 @@ require 'spec_helper'
 
 RSpec.describe BoardsHelper do
   let_it_be(:user) { create(:user) }
-  let_it_be(:project) { create(:project) }
   let_it_be(:base_group) { create(:group, path: 'base') }
+  let_it_be(:project) { create(:project, group: base_group) }
   let_it_be(:project_board) { create(:board, project: project) }
   let_it_be(:group_board) { create(:board, group: base_group) }
 
@@ -82,6 +82,10 @@ RSpec.describe BoardsHelper do
         expect(helper.board_data[:labels_fetch_path]).to eq("/#{project.full_path}/-/labels.json?include_ancestor_groups=true")
         expect(helper.board_data[:labels_manage_path]).to eq("/#{project.full_path}/-/labels")
       end
+
+      it 'returns the group id of a project' do
+        expect(helper.board_data[:group_id]).to eq(project.group.id)
+      end
     end
 
     context 'group board' do
@@ -102,6 +106,10 @@ RSpec.describe BoardsHelper do
         expect(helper.board_data[:labels_fetch_path]).to eq("/groups/#{base_group.full_path}/-/labels.json?include_ancestor_groups=true&only_group_labels=true")
         expect(helper.board_data[:labels_manage_path]).to eq("/groups/#{base_group.full_path}/-/labels")
       end
+
+      it 'returns the group id' do
+        expect(helper.board_data[:group_id]).to eq(base_group.id)
+      end
     end
   end
 
diff --git a/spec/lib/gitlab/usage_data_spec.rb b/spec/lib/gitlab/usage_data_spec.rb
index 97000856626..b1581bf02a6 100644
--- a/spec/lib/gitlab/usage_data_spec.rb
+++ b/spec/lib/gitlab/usage_data_spec.rb
@@ -382,14 +382,15 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
   describe 'usage_activity_by_stage_monitor' do
     it 'includes accurate usage_activity_by_stage data' do
       for_defined_days_back do
-        user    = create(:user, dashboard: 'operations')
+        user = create(:user, dashboard: 'operations')
         cluster = create(:cluster, user: user)
-        create(:project, creator: user)
+        project = create(:project, creator: user)
         create(:clusters_applications_prometheus, :installed, cluster: cluster)
         create(:project_tracing_setting)
         create(:project_error_tracking_setting)
         create(:incident)
         create(:incident, alert_management_alert: create(:alert_management_alert))
+        create(:alert_management_http_integration, :active, project: project)
       end
 
       expect(described_class.usage_activity_by_stage_monitor({})).to include(
@@ -399,10 +400,12 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
         projects_with_tracing_enabled: 2,
         projects_with_error_tracking_enabled: 2,
         projects_with_incidents: 4,
-        projects_with_alert_incidents: 2
+        projects_with_alert_incidents: 2,
+        projects_with_enabled_alert_integrations_histogram: { '1' => 2 }
       )
 
-      expect(described_class.usage_activity_by_stage_monitor(described_class.last_28_days_time_period)).to include(
+      data_28_days = described_class.usage_activity_by_stage_monitor(described_class.last_28_days_time_period)
+      expect(data_28_days).to include(
         clusters: 1,
         clusters_applications_prometheus: 1,
         operations_dashboard_default_dashboard: 1,
@@ -411,6 +414,8 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
         projects_with_incidents: 2,
         projects_with_alert_incidents: 1
       )
+
+      expect(data_28_days).not_to include(:projects_with_enabled_alert_integrations_histogram)
     end
   end
 
@@ -528,14 +533,14 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
       expect(subject.keys).to include(*UsageDataHelpers::USAGE_DATA_KEYS)
     end
 
-    it 'gathers usage counts' do
+    it 'gathers usage counts', :aggregate_failures do
       count_data = subject[:counts]
 
       expect(count_data[:boards]).to eq(1)
       expect(count_data[:projects]).to eq(4)
-      expect(count_data.values_at(*UsageDataHelpers::SMAU_KEYS)).to all(be_an(Integer))
       expect(count_data.keys).to include(*UsageDataHelpers::COUNTS_KEYS)
       expect(UsageDataHelpers::COUNTS_KEYS - count_data.keys).to be_empty
+      expect(count_data.values).to all(be_a_kind_of(Integer))
     end
 
     it 'gathers usage counts correctly' do
diff --git a/spec/lib/gitlab/utils/usage_data_spec.rb b/spec/lib/gitlab/utils/usage_data_spec.rb
index 45e57428141..6e1904c43e1 100644
--- a/spec/lib/gitlab/utils/usage_data_spec.rb
+++ b/spec/lib/gitlab/utils/usage_data_spec.rb
@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe Gitlab::Utils::UsageData do
+  include Database::DatabaseHelpers
+
   describe '#count' do
     let(:relation) { double(:relation) }
 
@@ -183,6 +185,102 @@ RSpec.describe Gitlab::Utils::UsageData do
     end
   end
 
+  describe '#histogram' do
+    let_it_be(:projects) { create_list(:project, 3) }
+    let(:project1) { projects.first }
+    let(:project2) { projects.second }
+    let(:project3) { projects.third }
+
+    let(:fallback) { described_class::HISTOGRAM_FALLBACK }
+    let(:relation) { AlertManagement::HttpIntegration.active }
+    let(:column) { :project_id }
+
+    def expect_error(exception, message, &block)
+      expect(Gitlab::ErrorTracking)
+        .to receive(:track_and_raise_for_dev_exception)
+        .with(instance_of(exception))
+        .and_call_original
+
+      expect(&block).to raise_error(
+        an_instance_of(exception).and(
+          having_attributes(message: message, backtrace: be_kind_of(Array)))
+      )
+    end
+
+    it 'checks bucket bounds to be not equal' do
+      expect_error(ArgumentError, 'Lower bucket bound cannot equal to upper bucket bound') do
+        described_class.histogram(relation, column, buckets: 1..1)
+      end
+    end
+
+    it 'checks bucket_size being non-zero' do
+      expect_error(ArgumentError, 'Bucket size cannot be zero') do
+        described_class.histogram(relation, column, buckets: 1..2, bucket_size: 0)
+      end
+    end
+
+    it 'limits the amount of buckets without providing bucket_size argument' do
+      expect_error(ArgumentError, 'Bucket size 101 exceeds the limit of 100') do
+        described_class.histogram(relation, column, buckets: 1..101)
+      end
+    end
+
+    it 'limits the amount of buckets when providing bucket_size argument' do
+      expect_error(ArgumentError, 'Bucket size 101 exceeds the limit of 100') do
+        described_class.histogram(relation, column, buckets: 1..2, bucket_size: 101)
+      end
+    end
+
+    it 'without data' do
+      histogram = described_class.histogram(relation, column, buckets: 1..100)
+
+      expect(histogram).to eq({})
+    end
+
+    it 'aggregates properly within bounds' do
+      create(:alert_management_http_integration, :active, project: project1)
+      create(:alert_management_http_integration, :inactive, project: project1)
+
+      create(:alert_management_http_integration, :active, project: project2)
+      create(:alert_management_http_integration, :active, project: project2)
+      create(:alert_management_http_integration, :inactive, project: project2)
+
+      create(:alert_management_http_integration, :active, project: project3)
+      create(:alert_management_http_integration, :inactive, project: project3)
+
+      histogram = described_class.histogram(relation, column, buckets: 1..100)
+
+      expect(histogram).to eq('1' => 2, '2' => 1)
+    end
+
+    it 'aggregates properly out of bounds' do
+      create_list(:alert_management_http_integration, 3, :active, project: project1)
+      histogram = described_class.histogram(relation, column, buckets: 1..2)
+
+      expect(histogram).to eq('2' => 1)
+    end
+
+    it 'returns fallback and logs canceled queries' do
+      create(:alert_management_http_integration, :active, project: project1)
+
+      expect(Gitlab::AppJsonLogger).to receive(:error).with(
+        event: 'histogram',
+        relation: relation.table_name,
+        operation: 'histogram',
+        operation_args: [column, 1, 100, 99],
+        query: kind_of(String),
+        message: /PG::QueryCanceled/
+      )
+
+      with_statement_timeout(0.001) do
+        relation = AlertManagement::HttpIntegration.select('pg_sleep(0.002)')
+        histogram = described_class.histogram(relation, column, buckets: 1..100)
+
+        expect(histogram).to eq(fallback)
+      end
+    end
+  end
+
   describe '#add' do
     it 'adds given values' do
       expect(described_class.add(1, 3)).to eq(4)
diff --git a/spec/support/helpers/database/database_helpers.rb b/spec/support/helpers/database/database_helpers.rb
index b8d7ea3662f..db093bcef85 100644
--- a/spec/support/helpers/database/database_helpers.rb
+++ b/spec/support/helpers/database/database_helpers.rb
@@ -5,11 +5,65 @@ module Database
     # In order to directly work with views using factories,
     # we can swapout the view for a table of identical structure.
     def swapout_view_for_table(view)
-      ActiveRecord::Base.connection.execute(<<~SQL)
+      ActiveRecord::Base.connection.execute(<<~SQL.squish)
         CREATE TABLE #{view}_copy (LIKE #{view});
         DROP VIEW #{view};
         ALTER TABLE #{view}_copy RENAME TO #{view};
       SQL
     end
+
+    # Set statement timeout temporarily.
+    # Useful when testing query timeouts.
+    #
+    # Note that this method cannot restore the timeout if a query
+    # was canceled due to e.g. a statement timeout.
+    # Refrain from using this transaction in these situations.
+    #
+    # @param timeout - Statement timeout in seconds
+    #
+    # Example:
+    #
+    #   with_statement_timeout(0.1) do
+    #     model.select('pg_sleep(0.11)')
+    #   end
+    def with_statement_timeout(timeout)
+      # Force a positive value and a minimum of 1ms for very small values.
+      timeout = (timeout * 1000).abs.ceil
+
+      raise ArgumentError, 'Using a timeout of `0` means to disable statement timeout.' if timeout == 0
+
+      previous_timeout = ActiveRecord::Base.connection
+        .exec_query('SHOW statement_timeout')[0].fetch('statement_timeout')
+
+      set_statement_timeout("#{timeout}ms")
+
+      yield
+    ensure
+      begin
+        set_statement_timeout(previous_timeout)
+      rescue ActiveRecord::StatementInvalid
+        # After a transaction was canceled/aborted due to e.g. a statement
+        # timeout commands are ignored and will raise in PG::InFailedSqlTransaction.
+        # We can safely ignore this error because the statement timeout was set
+        # for the currrent transaction which will be closed anyway.
+      end
+    end
+
+    # Set statement timeout for the current transaction.
+    #
+    # Note, that it does not restore the previous statement timeout.
+    # Use `with_statement_timeout` instead.
+    #
+    # @param timeout - Statement timeout in seconds
+    #
+    # Example:
+    #
+    #   set_statement_timeout(0.1)
+    #   model.select('pg_sleep(0.11)')
+    def set_statement_timeout(timeout)
+      ActiveRecord::Base.connection.execute(
+        format(%(SET LOCAL statement_timeout = '%s'), timeout)
+      )
+    end
   end
 end
diff --git a/yarn.lock b/yarn.lock
index 2d02295121b..dd63db5131d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4308,10 +4308,10 @@ domhandler@^2.3.0:
   dependencies:
     domelementtype "1"
 
-dompurify@^2.2.6:
-  version "2.2.6"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.2.6.tgz#54945dc5c0b45ce5ae228705777e8e59d7b2edc4"
-  integrity sha512-7b7ZArhhH0SP6W2R9cqK6RjaU82FZ2UPM7RO8qN1b1wyvC/NY1FNWcX1Pu00fFOAnzEORtwXe4bPaClg6pUybQ==
+dompurify@^2.2.6, dompurify@^2.2.7:
+  version "2.2.7"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.2.7.tgz#a5f055a2a471638680e779bd08fc334962d11fd8"
+  integrity sha512-jdtDffdGNY+C76jvodNTu9jt5yYj59vuTUyx+wXdzcSwAGTYZDAQkQ7Iwx9zcGrA4ixC1syU4H3RZROqRxokxg==
 
 domutils@^1.5.1:
   version "1.7.0"