Add support for skopeo copy

This change fixes the API to support skopeo that except status code 201
on creation.

Change-Id: I28e4ca5c19f935d0ecbf916d5f89fbb4ca068c19

playbooks/functional-test/main.yaml

@@ -54,3 +54,15 @@
 
 - name: Print list of images
   command: docker image ls --all --digests --no-trunc
+
+- name: Create a local containers/image
+  shell: buildah commit --rm $(buildah from scratch) local-test
+
+- name: Check the local image is there
+  command: skopeo inspect containers-storage:localhost/local-test:latest
+
+- name: Copy the local image to the registry
+  command: >
+    skopeo copy --dest-creds testuser:testpass --dest-tls-verify=false
+      containers-storage:localhost/local-test:latest
+      docker://127.0.0.1:9000/test

playbooks/functional-test/run.yaml

@@ -8,11 +8,18 @@
     workspace: /tmp/registry-test
     local: false
   tasks:
+    - name: Add project atomic PPA
+      apt_repository:
+        repo: ppa:projectatomic/ppa
+      become: true
+
     - name: Install packages
       package:
         name:
           - docker-compose
           - openssl
+          - skopeo
+          - buildah
         state: present
       become: true
     - name: Run main tasks

zuul_registry/main.py

@@ -172,7 +172,7 @@ class RegistryAPI:
         res.headers['Location'] = '/v2/%s/blobs/%s' % (repository, digest)
         res.headers['Docker-Content-Digest'] = digest
         res.headers['Content-Range'] = '%s-%s' % (old_length, new_length)
-        res.status = '204 No Content'
+        res.status = '201 Created'
 
     @cherrypy.expose
     @cherrypy.config(**{'tools.auth_basic.checkpassword': require_write})