Send credentials array with build data

app/models/ci/build.rb

@@ -448,8 +448,19 @@ module Ci
       ]
     end
 
+    def credentials
+      [build_container_registry_credentials].compact
+    end
+
     private
 
+    def build_container_registry_credentials
+      return unless Gitlab.config.registry.enabled
+
+      Gitlab::Ci::Build::Credentials.new('docker-registry', Gitlab.config.registry.host_port,
+                                         'gitlab-ci-token', token)
+    end
+
     def update_artifacts_size
       self.artifacts_size = if artifacts_file.exists?
                               artifacts_file.size

changelogs/unreleased/feature-send-registry-address-with-build-payload.yml

 ---
-title: Send registry_url with build data to GitLab Runner
+title: Send credentials (currently for registry only) with build data to GitLab Runner
 merge_request: 7474
 author:

lib/ci/api/entities.rb

@@ -32,6 +32,10 @@ module Ci
         expose :artifacts_file, using: ArtifactFile, if: ->(build, _) { build.artifacts? }
       end
 
+      class BuildCredentials < Grape::Entity
+        expose :type, :url, :username, :password
+      end
+
       class BuildDetails < Build
         expose :commands
         expose :repo_url
@@ -51,9 +55,7 @@ module Ci
         expose :variables
         expose :depends_on_builds, using: Build
 
-        expose :registry_url, if: ->(_, _) { Gitlab.config.registry.enabled } do |_|
-          Gitlab.config.registry.host_port
-        end
+        expose :credentials, using: BuildCredentials
       end
 
       class Runner < Grape::Entity

lib/gitlab/ci/build/credentials.rb

+module Gitlab
+  module Ci
+    module Build
+      class Credentials
+        attr_accessor :type, :url, :username, :password
+
+        def initialize(type, url, username, password)
+          @type = type
+          @url = url
+          @username = username
+          @password = password
+        end
+      end
+    end
+  end
+end

spec/requests/ci/api/builds_spec.rb

@@ -58,16 +58,24 @@ describe Ci::API::API do
           expect { register_builds }.to change { runner.reload.contacted_at }
         end
 
+        context 'registry credentials' do
+          let(:registry_credentials) do
+            { 'type' => 'docker-registry',
+              'url' => 'registry.example.com:5005',
+              'username' => 'gitlab-ci-token',
+              'password' => build.token }
+          end
+
           context 'when registry is enabled' do
             before do
               stub_container_registry_config(enabled: true, host_port: 'registry.example.com:5005')
             end
 
-          it 'sends registry_url key' do
+            it 'sends registry credentials key' do
               register_builds info: { platform: :darwin }
 
-            expect(json_response).to have_key('registry_url')
-            expect(json_response['registry_url']).to eq("registry.example.com:5005")
+              expect(json_response).to have_key('credentials')
+              expect(json_response['credentials']).to include(registry_credentials)
             end
           end
 
@@ -76,10 +84,12 @@ describe Ci::API::API do
               stub_container_registry_config(enabled: false, host_port: 'registry.example.com:5005')
             end
 
-          it 'does not send registry_url key' do
+            it 'does not send registry credentials' do
               register_builds info: { platform: :darwin }
 
-            expect(json_response).not_to have_key('registry_url')
+              expect(json_response).to have_key('credentials')
+              expect(json_response['credentials']).not_to include(registry_credentials)
+            end
           end
         end
       end