Add Redis versions to admin page

This will help admins tell whether they need to update.

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/213174

app/controllers/admin/dashboard_controller.rb

@@ -16,6 +16,7 @@ class Admin::DashboardController < Admin::ApplicationController
     @groups = Group.order_id_desc.with_route.limit(10)
     @notices = Gitlab::ConfigChecker::PumaRuggedChecker.check
     @notices += Gitlab::ConfigChecker::ExternalDatabaseChecker.check
+    @redis_versions = [Gitlab::Redis::Queues, Gitlab::Redis::SharedState, Gitlab::Redis::Cache].map(&:version).uniq
   end
   # rubocop: enable CodeReuse/ActiveRecord
 

app/views/admin/dashboard/index.html.haml

@@ -139,6 +139,10 @@
             = Gitlab::Database.human_adapter_name
             %span.float-right
               = Gitlab::Database.version
+          %p
+            = _('Redis')
+            %span.float-right
+              = @redis_versions&.join(", ")
           %p
             = link_to _("Gitaly Servers"), admin_gitaly_servers_path
   .row

changelogs/unreleased/sh-add-redis-version-to-admin-page.yml

+---
+title: Add Redis version to admin page
+merge_request: 47242
+author:
+type: added

lib/gitlab/redis/wrapper.rb

@@ -18,6 +18,10 @@ module Gitlab
           pool.with { |redis| yield redis }
         end
 
+        def version
+          with { |redis| redis.info['redis_version'] }
+        end
+
         def pool
           @pool ||= ConnectionPool.new(size: pool_size) { ::Redis.new(params) }
         end

locale/gitlab.pot

@@ -22148,6 +22148,9 @@ msgstr ""
 msgid "Redirect to SAML provider to test configuration"
 msgstr ""
 
+msgid "Redis"
+msgstr ""
+
 msgid "Reduce project visibility"
 msgstr ""
 

spec/controllers/admin/dashboard_controller_spec.rb

@@ -4,12 +4,20 @@ require 'spec_helper'
 
 RSpec.describe Admin::DashboardController do
   describe '#index' do
+    before do
+      sign_in(create(:admin))
+    end
+
+    it 'retrieves Redis versions' do
+      get :index
+
+      expect(assigns[:redis_versions].length).to eq(1)
+    end
+
     context 'with pending_delete projects' do
       render_views
 
       it 'does not retrieve projects that are pending deletion' do
-        sign_in(create(:admin))
-
         project = create(:project)
         pending_delete_project = create(:project, pending_delete: true)
 

spec/lib/gitlab/redis/wrapper_spec.rb

@@ -26,6 +26,12 @@ RSpec.describe Gitlab::Redis::Wrapper do
     end
   end
 
+  describe '.version' do
+    it 'returns a version' do
+      expect(described_class.version).to be_present
+    end
+  end
+
   describe '.instrumentation_class' do
     it 'raises a NotImplementedError' do
       expect(described_class).to receive(:instrumentation_class).and_call_original