Return gitaly info in kubernetes internal API

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/229462

changelogs/unreleased/mattkasa-229462-gitaly-kubernetes-api.yml

+---
+title: Return gitaly info in kubernetes internal API
+merge_request: 38654
+author:
+type: added

lib/api/internal/kubernetes.rb

@@ -5,52 +5,67 @@ module API
   module Internal
     class Kubernetes < Grape::API::Instance
       helpers do
+        def agent_token
+          @agent_token ||= cluster_agent_token_from_authorization_token
+        end
+
+        def agent
+          @agent ||= agent_token.agent
+        end
+
         def repo_type
           Gitlab::GlRepository::PROJECT
         end
 
-        def gl_repository(project)
-          repo_type.identifier_for_container(project)
+        def gitaly_info(project)
+          shard = repo_type.repository_for(project).shard
+          {
+            address: Gitlab::GitalyClient.address(shard),
+            token: Gitlab::GitalyClient.token(shard),
+            features: Feature::Gitaly.server_feature_flags
+          }
         end
 
-        def gl_repository_path(project)
-          repo_type.repository_for(project).full_path
+        def gitaly_repository(project)
+          {
+            storage_name: project.repository_storage,
+            relative_path: project.disk_path + '.git',
+            gl_repository: repo_type.identifier_for_container(project),
+            gl_project_path: repo_type.repository_for(project).full_path
+          }
         end
 
         def check_feature_enabled
           not_found! unless Feature.enabled?(:kubernetes_agent_internal_api)
         end
+
+        def check_agent_token
+          forbidden! unless agent_token
+        end
       end
 
       namespace 'internal' do
         namespace 'kubernetes' do
+          before do
+            check_feature_enabled
+            check_agent_token
+          end
+
           desc 'Gets agent info' do
             detail 'Retrieves agent info for the given token'
           end
           route_setting :authentication, cluster_agent_token_allowed: true
           get '/agent_info' do
-            check_feature_enabled
-
-            agent_token = cluster_agent_token_from_authorization_token
-
-            if agent_token
-              agent = agent_token.agent
             project = agent.project
-              @gl_project_string = "project-#{project.id}"
 
             status 200
             {
               project_id: project.id,
               agent_id: agent.id,
               agent_name: agent.name,
-                storage_name: project.repository_storage,
-                relative_path: project.disk_path + '.git',
-                gl_repository: gl_repository(project),
-                gl_project_path: gl_repository_path(project)
+              gitaly_info: gitaly_info(project),
+              gitaly_repository: gitaly_repository(project)
             }
-            else
-              status 403
-            end
           end
 
           desc 'Gets project info' do
@@ -58,11 +73,6 @@ module API
           end
           route_setting :authentication, cluster_agent_token_allowed: true
           get '/project_info' do
-            check_feature_enabled
-
-            agent_token = cluster_agent_token_from_authorization_token
-
-            if agent_token
             project = find_project(params[:id])
 
             # TODO sort out authorization for real
@@ -71,19 +81,12 @@ module API
               not_found!
             end
 
-              @gl_project_string = "project-#{project.id}"
-
             status 200
             {
               project_id: project.id,
-                storage_name: project.repository_storage,
-                relative_path: project.disk_path + '.git',
-                gl_repository: gl_repository(project),
-                gl_project_path: gl_repository_path(project)
+              gitaly_info: gitaly_info(project),
+              gitaly_repository: gitaly_repository(project)
             }
-            else
-              status 403
-            end
           end
         end
       end

spec/requests/api/internal/kubernetes_spec.rb

@@ -33,13 +33,24 @@ RSpec.describe API::Internal::Kubernetes do
 
         expect(response).to have_gitlab_http_status(:success)
 
-        expect(json_response['project_id']).to eq(project.id)
-        expect(json_response['agent_id']).to eq(agent.id)
-        expect(json_response['agent_name']).to eq(agent.name)
-        expect(json_response['storage_name']).to eq(project.repository_storage)
-        expect(json_response['relative_path']).to eq(project.disk_path + '.git')
-        expect(json_response['gl_repository']).to eq("project-#{project.id}")
-        expect(json_response['gl_project_path']).to eq(project.full_path)
+        expect(json_response).to match(
+          a_hash_including(
+            'project_id' => project.id,
+            'agent_id' => agent.id,
+            'agent_name' => agent.name,
+            'gitaly_info' => a_hash_including(
+              'address' => match(/\.socket$/),
+              'token' => 'secret',
+              'features' => {}
+            ),
+            'gitaly_repository' => a_hash_including(
+              'storage_name' => project.repository_storage,
+              'relative_path' => project.disk_path + '.git',
+              'gl_repository' => "project-#{project.id}",
+              'gl_project_path' => project.full_path
+            )
+          )
+        )
       end
     end
 
@@ -92,11 +103,22 @@ RSpec.describe API::Internal::Kubernetes do
 
           expect(response).to have_gitlab_http_status(:success)
 
-          expect(json_response['project_id']).to eq(project.id)
-          expect(json_response['storage_name']).to eq(project.repository_storage)
-          expect(json_response['relative_path']).to eq(project.disk_path + '.git')
-          expect(json_response['gl_repository']).to eq("project-#{project.id}")
-          expect(json_response['gl_project_path']).to eq(project.full_path)
+          expect(json_response).to match(
+            a_hash_including(
+              'project_id' => project.id,
+              'gitaly_info' => a_hash_including(
+                'address' => match(/\.socket$/),
+                'token' => 'secret',
+                'features' => {}
+              ),
+              'gitaly_repository' => a_hash_including(
+                'storage_name' => project.repository_storage,
+                'relative_path' => project.disk_path + '.git',
+                'gl_repository' => "project-#{project.id}",
+                'gl_project_path' => project.full_path
+              )
+            )
+          )
         end
       end