Add monitoring link with subtabs

app/views/admin/background_jobs/_head.html.haml

+%ul.nav-links.sub-nav
+  %div{ class: (container_class) }
+    = nav_link(controller: :background_jobs) do
+      = link_to admin_background_jobs_path, title: 'Background Jobs' do
+        %span
+          Background Jobs
+    = nav_link(controller: :logs) do
+      = link_to admin_logs_path, title: 'Logs' do
+        %span
+          Logs
+    = nav_link(controller: :health_check) do
+      = link_to admin_health_check_path, title: 'Health Check' do
+        %span
+          Health Check

app/views/admin/background_jobs/show.html.haml

+- @no_container = true
 - page_title "Background Jobs"
-%h3.page-title Background Jobs
-%p.light GitLab uses #{link_to "sidekiq", "http://sidekiq.org/"} library for async job processing
+= render 'admin/background_jobs/head'
 
-%hr
+%div{ class: (container_class) }
+  %h3.page-title Background Jobs
+  %p.light GitLab uses #{link_to "sidekiq", "http://sidekiq.org/"} library for async job processing
 
-.panel.panel-default
-  .panel-heading Sidekiq running processes
-  .panel-body
-    - if @sidekiq_processes.empty?
-      %h4.cred
-        %i.fa.fa-exclamation-triangle
-        There are no running sidekiq processes. Please restart GitLab
-    - else
-      .table-holder
-        %table.table
-          %thead
-            %th USER
-            %th PID
-            %th CPU
-            %th MEM
-            %th STATE
-            %th START
-            %th COMMAND
-          %tbody
-            - @sidekiq_processes.each do |process|
-              - next unless process.match(/(sidekiq \d+\.\d+\.\d+.+$)/)
-              - data = process.strip.split(' ')
-              %tr
-                %td= gitlab_config.user
-                - 5.times do
-                  %td= data.shift
-                %td= data.join(' ')
+  %hr
 
-      .clearfix
-        %p
-          %i.fa.fa-exclamation-circle
-          If '[25 of 25 busy]' is shown, restart GitLab with 'sudo service gitlab reload'.
-        %p
-          %i.fa.fa-exclamation-circle
-          If more than one sidekiq process is listed, stop GitLab, kill the remaining sidekiq processes (sudo pkill -u #{gitlab_config.user} -f sidekiq) and restart GitLab.
+  .panel.panel-default
+    .panel-heading Sidekiq running processes
+    .panel-body
+      - if @sidekiq_processes.empty?
+        %h4.cred
+          %i.fa.fa-exclamation-triangle
+          There are no running sidekiq processes. Please restart GitLab
+      - else
+        .table-holder
+          %table.table
+            %thead
+              %th USER
+              %th PID
+              %th CPU
+              %th MEM
+              %th STATE
+              %th START
+              %th COMMAND
+            %tbody
+              - @sidekiq_processes.each do |process|
+                - next unless process.match(/(sidekiq \d+\.\d+\.\d+.+$)/)
+                - data = process.strip.split(' ')
+                %tr
+                  %td= gitlab_config.user
+                  - 5.times do
+                    %td= data.shift
+                  %td= data.join(' ')
 
+        .clearfix
+          %p
+            %i.fa.fa-exclamation-circle
+            If '[25 of 25 busy]' is shown, restart GitLab with 'sudo service gitlab reload'.
+          %p
+            %i.fa.fa-exclamation-circle
+            If more than one sidekiq process is listed, stop GitLab, kill the remaining sidekiq processes (sudo pkill -u #{gitlab_config.user} -f sidekiq) and restart GitLab.
 
 
-.panel.panel-default
-  %iframe{src: sidekiq_path, width: '100%', height: 970, style: "border: none"}
+
+  .panel.panel-default
+    %iframe{src: sidekiq_path, width: '100%', height: 970, style: "border: none"}

app/views/admin/health_check/show.html.haml

+- @no_container = true
 - page_title "Health Check"
+= render 'admin/background_jobs/head'
 
-%h3.page-title
-  Health Check
-.bs-callout.clearfix
-  .pull-left
-    %p
-  Access token is
-  %code#health-check-token= current_application_settings.health_check_access_token
-  = button_to reset_health_check_token_admin_application_settings_path,
-    method: :put, class: 'btn btn-default',
-    data: { confirm: 'Are you sure you want to reset the health check token?' } do
-    = icon('refresh')
-    Reset health check access token
-%p.light
-  Health information can be retrieved as plain text, JSON, or XML using:
-  %ul
-    %li
-      %code= health_check_url(token: current_application_settings.health_check_access_token)
-    %li
-      %code= health_check_url(token: current_application_settings.health_check_access_token, format: :json)
-    %li
-      %code= health_check_url(token: current_application_settings.health_check_access_token, format: :xml)
+%div{ class: (container_class) }
+  %h3.page-title
+    Health Check
+  .bs-callout.clearfix
+    .pull-left
+      %p
+    Access token is
+    %code#health-check-token= current_application_settings.health_check_access_token
+    = button_to reset_health_check_token_admin_application_settings_path,
+      method: :put, class: 'btn btn-default',
+      data: { confirm: 'Are you sure you want to reset the health check token?' } do
+      = icon('refresh')
+      Reset health check access token
+  %p.light
+    Health information can be retrieved as plain text, JSON, or XML using:
+    %ul
+      %li
+        %code= health_check_url(token: current_application_settings.health_check_access_token)
+      %li
+        %code= health_check_url(token: current_application_settings.health_check_access_token, format: :json)
+      %li
+        %code= health_check_url(token: current_application_settings.health_check_access_token, format: :xml)
 
-%p.light
-  You can also ask for the status of specific services:
-  %ul
-    %li
-      %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :cache)
-    %li
-      %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :database)
-    %li
-      %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :migrations)
+  %p.light
+    You can also ask for the status of specific services:
+    %ul
+      %li
+        %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :cache)
+      %li
+        %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :database)
+      %li
+        %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :migrations)
 
-%hr
-.panel.panel-default
-  .panel-heading
-    Current Status:
-    - if @errors.blank?
-      = icon('circle', class: 'cgreen')
-      Healthy
-    - else
-      = icon('warning', class: 'cred')
-      Unhealthy
-  .panel-body
-    - if @errors.blank?
-      No Health Problems Detected
-    - else
-      = @errors
+  %hr
+  .panel.panel-default
+    .panel-heading
+      Current Status:
+      - if @errors.blank?
+        = icon('circle', class: 'cgreen')
+        Healthy
+      - else
+        = icon('warning', class: 'cred')
+        Unhealthy
+    .panel-body
+      - if @errors.blank?
+        No Health Problems Detected
+      - else
+        = @errors

app/views/admin/logs/show.html.haml

+- @no_container = true
 - page_title "Logs"
 - loggers = [Gitlab::GitLogger, Gitlab::AppLogger,
              Gitlab::ProductionLogger, Gitlab::SidekiqLogger,
              Gitlab::RepositoryCheckLogger]
-%ul.nav-links.log-tabs
-  - loggers.each do |klass|
-    %li{ class: (klass == Gitlab::GitLogger ? 'active' : '') }
-      = link_to klass::file_name, "##{klass::file_name_noext}",
-          'data-toggle' => 'tab'
-.row-content-block
-  To prevent performance issues admin logs output the last 2000 lines
-.tab-content
-  - loggers.each do |klass|
-    .tab-pane{ class: (klass == Gitlab::GitLogger ? 'active' : ''),
-        id: klass::file_name_noext }
-      .file-holder#README
-        .file-title
-          %i.fa.fa-file
-          = klass::file_name
-          .pull-right
-            = link_to '#', class: 'log-bottom' do
-              %i.fa.fa-arrow-down
-              Scroll down
-        .file-content.logs
-          %ol
-            - klass.read_latest.each do |line|
-              %li
-                %p= line
+= render 'admin/background_jobs/head'
+
+%div{ class: (container_class) }
+  %ul.nav-links.log-tabs
+    - loggers.each do |klass|
+      %li{ class: (klass == Gitlab::GitLogger ? 'active' : '') }
+        = link_to klass::file_name, "##{klass::file_name_noext}",
+            'data-toggle' => 'tab'
+  .row-content-block
+    To prevent performance issues admin logs output the last 2000 lines
+  .tab-content
+    - loggers.each do |klass|
+      .tab-pane{ class: (klass == Gitlab::GitLogger ? 'active' : ''),
+          id: klass::file_name_noext }
+        .file-holder#README
+          .file-title
+            %i.fa.fa-file
+            = klass::file_name
+            .pull-right
+              = link_to '#', class: 'log-bottom' do
+                %i.fa.fa-arrow-down
+                Scroll down
+          .file-content.logs
+            %ol
+              - klass.read_latest.each do |line|
+                %li
+                  %p= line

app/views/layouts/nav/_admin.html.haml

@@ -16,14 +16,10 @@
     = link_to admin_builds_path, title: 'Builds' do
       %span
         Builds
-  = nav_link(controller: :logs) do
-    = link_to admin_logs_path, title: 'Logs' do
+  = nav_link(controller: %w(background_jobs logs health_check)) do
+    = link_to admin_background_jobs_path, title: 'Monitoring' do
       %span
-        Logs
-  = nav_link(controller: :health_check) do
-    = link_to admin_health_check_path, title: 'Health Check' do
-      %span
-        Health Check
+        Monitoring
   = nav_link(controller: :broadcast_messages) do
     = link_to admin_broadcast_messages_path, title: 'Messages' do
       %span
@@ -32,10 +28,7 @@
     = link_to admin_hooks_path, title: 'Hooks' do
       %span
         Hooks
-  = nav_link(controller: :background_jobs) do
-    = link_to admin_background_jobs_path, title: 'Background Jobs' do
-      %span
-        Background Jobs
+
   = nav_link(controller: :appearances) do
     = link_to admin_appearances_path, title: 'Appearances' do
       %span