From 49110854cb5f036f986613d7ebe7e6150f5e650f Mon Sep 17 00:00:00 2001
From: Ina Panova <ipanova@redhat.com>
Date: Wed, 2 Oct 2019 13:35:56 +0200
Subject: [PATCH] Docker-Distribution-API-Version should be present among
 response headers.

closes #5527
https://pulp.plan.io/issues/5527
---
 CHANGES/5527.bugfix         | 1 +
 pulp_docker/app/registry.py | 7 +++++--
 2 files changed, 6 insertions(+), 2 deletions(-)
 create mode 100644 CHANGES/5527.bugfix

diff --git a/CHANGES/5527.bugfix b/CHANGES/5527.bugfix
new file mode 100644
index 00000000..61afd031
--- /dev/null
+++ b/CHANGES/5527.bugfix
@@ -0,0 +1 @@
+Add Docker-Distribution-API-Version header among response headers.
diff --git a/pulp_docker/app/registry.py b/pulp_docker/app/registry.py
index b6bd00da..d8f13e72 100644
--- a/pulp_docker/app/registry.py
+++ b/pulp_docker/app/registry.py
@@ -14,6 +14,9 @@
 
 log = logging.getLogger(__name__)
 
+v2_headers = MultiDict()
+v2_headers['Docker-Distribution-API-Version'] = 'registry/2.0'
+
 
 class ArtifactNotFound(Exception):
     """
@@ -96,7 +99,7 @@ async def serve_v2(request):
 
         The docker client uses this endpoint to discover that the V2 API is available.
         """
-        return web.json_response({})
+        return web.json_response({}, headers=v2_headers)
 
     async def tags_list(self, request):
         """
@@ -111,7 +114,7 @@ async def tags_list(self, request):
             if isinstance(c, Tag):
                 tags['tags'].add(c.name)
         tags['tags'] = list(tags['tags'])
-        return web.json_response(tags)
+        return web.json_response(tags, headers=v2_headers)
 
     async def get_tag(self, request):
         """