2 files changed, 22 insertions, 0 deletions
diff --git a/app/models/clusters/applications/jupyter.rb b/app/models/clusters/applications/jupyter.rb
index 3d84eeed5a8..2371b0237d8 100644
--- a/app/models/clusters/applications/jupyter.rb
+++ b/app/models/clusters/applications/jupyter.rb
@@ -73,10 +73,19 @@ module Clusters
               "clientSecret" => oauth_application.secret,
               "callbackUrl" => callback_url
             }
+          },
+          "singleuser" => {
+            "extraEnv" => {
+              "GITLAB_PROJECT_ID" => project_id
+            }
           }
         }
       end
 
+      def project_id
+        cluster&.project&.id
+      end
+
       def gitlab_url
         Gitlab.config.gitlab.url
       end
diff --git a/spec/models/clusters/applications/jupyter_spec.rb b/spec/models/clusters/applications/jupyter_spec.rb
index 591a01d78a9..44a64928e94 100644
--- a/spec/models/clusters/applications/jupyter_spec.rb
+++ b/spec/models/clusters/applications/jupyter_spec.rb
@@ -108,8 +108,21 @@ describe Clusters::Applications::Jupyter do
       expect(values).to include('rbac')
       expect(values).to include('proxy')
       expect(values).to include('auth')
+      expect(values).to include('singleuser')
       expect(values).to match(/clientId: '?#{application.oauth_application.uid}/)
       expect(values).to match(/callbackUrl: '?#{application.callback_url}/)
     end
+
+    context 'when cluster belongs to a project' do
+      let(:project) { create(:project) }
+
+      before do
+        application.cluster.projects << project
+      end
+
+      it 'sets GitLab project id' do
+        expect(values).to match(/GITLAB_PROJECT_ID: '?#{project.id}/)
+      end
+    end
   end
 end