1 files changed, 7 insertions, 0 deletions
diff --git a/lib/container_registry/tag.rb b/lib/container_registry/tag.rb
index ef41dc560c9..ebea84fa1ca 100644
--- a/lib/container_registry/tag.rb
+++ b/lib/container_registry/tag.rb
@@ -6,6 +6,9 @@ module ContainerRegistry
 
     attr_reader :repository, :name
 
+    # https://github.com/docker/distribution/commit/3150937b9f2b1b5b096b2634d0e7c44d4a0f89fb
+    TAG_NAME_REGEX = /^[\w][\w.-]{0,127}$/.freeze
+
     delegate :registry, :client, to: :repository
     delegate :revision, :short_revision, to: :config_blob, allow_nil: true
 
@@ -13,6 +16,10 @@ module ContainerRegistry
       @repository, @name = repository, name
     end
 
+    def valid_name?
+      !name.match(TAG_NAME_REGEX).nil?
+    end
+
     def valid?
       manifest.present?
     end