Add cluster project id to jupyter config

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/clusters/applications/jupyter.rb

@@ -72,10 +72,19 @@ 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

spec/models/clusters/applications/jupyter_spec.rb

@@ -99,8 +99,21 @@ 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