Add config for dependency proxy feature

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

config/gitlab.yml.example

@@ -248,6 +248,27 @@ production: &base
         # aws_signature_version: 4 # For creation of signed URLs. Set to 2 if provider does not support v4.
         # path_style: true # Use 'host/bucket_name/object' instead of 'bucket_name.host/object'
 
+  ## Dependency Proxy
+  dependency_proxy:
+    enabled: true
+    # The location where build packages are stored (default: shared/dependency_proxy).
+    # storage_path: shared/dependency_proxy
+    object_store:
+      enabled: false
+      remote_directory: dependency_proxy # The bucket name
+      # direct_upload: false # Use Object Storage directly for uploads instead of background uploads if enabled (Default: false)
+      # background_upload: false # Temporary option to limit automatic upload (Default: true)
+      # proxy_download: false # Passthrough all downloads via GitLab instead of using Redirects to Object Storage
+      connection:
+        provider: AWS
+        aws_access_key_id: AWS_ACCESS_KEY_ID
+        aws_secret_access_key: AWS_SECRET_ACCESS_KEY
+        region: us-east-1
+        # host: 'localhost' # default: s3.amazonaws.com
+        # endpoint: 'http://127.0.0.1:9000' # default: nil
+        # aws_signature_version: 4 # For creation of signed URLs. Set to 2 if provider does not support v4.
+        # path_style: true # Use 'host/bucket_name/object' instead of 'bucket_name.host/object'
+
   ## GitLab Pages
   pages:
     enabled: false

config/initializers/1_settings.rb

@@ -294,6 +294,19 @@ Settings.packages['enabled']      = true if Settings.packages['enabled'].nil?
 Settings.packages['storage_path'] = Settings.absolute(Settings.packages['storage_path'] || File.join(Settings.shared['path'], "packages"))
 Settings.packages['object_store'] = ObjectStoreSettings.parse(Settings.packages['object_store'])
 
+#
+# Dependency Proxy
+#
+Settings['dependency_proxy'] ||= Settingslogic.new({})
+Settings.dependency_proxy['enabled']      = true if Settings.dependency_proxy['enabled'].nil?
+Settings.dependency_proxy['storage_path'] = Settings.absolute(Settings.dependency_proxy['storage_path'] || File.join(Settings.shared['path'], "dependency_proxy"))
+Settings.dependency_proxy['object_store'] = ObjectStoreSettings.parse(Settings.dependency_proxy['object_store'])
+# For first iteration dependency proxy uses Rails server to download blobs.
+# To ensure acceptable performance we only allow feature to be used with
+# multithreaded web-server Puma. This will be removed once download logic is moved
+# to GitLab workhorse
+Settings.dependency_proxy['enabled'] = false unless defined?(::Puma)
+
 #
 # Mattermost
 #