Add more robust testing of the registry

We use a non trivial image now (the registry's image in fact) and then
push with 4 processes at a time every time we push to the test registry.
The idea here is we're generating concurrency in the system that should
trip over the bugs that we are finding if they still exist.

Change-Id: I4f03132fa0fad6f40806030b14d429d29036a42f

playbooks/functional-test/docker.yaml

@@ -20,7 +20,10 @@
   command: docker login localhost:9000 -u testuser -p testpass
 
 - name: Push the test image to the registry
-  command: docker push localhost:9000/test/image
+  # Use a lot of concurrency to check registry with concurrent pushes
+  shell: printf "1\n2\n3\n4\n" | xargs -P 4 -I DNE docker push localhost:9000/test/image
+  args:
+    executable: /bin/bash
 
 - name: Remove the test image from the local cache
   command: docker rmi localhost:9000/test/image

playbooks/functional-test/podman.yaml

@@ -20,7 +20,10 @@
   command: podman login localhost:9000 -u testuser -p testpass
 
 - name: Push the test image to the registry
-  command: podman push localhost:9000/test/image
+  # Use a lot of concurrency to check registry with concurrent pushes
+  shell: printf "1\n2\n3\n4\n" | xargs -P 4 -I DNE podman push localhost:9000/test/image
+  args:
+    executable: /bin/bash
 
 - name: Remove the test image from the local cache
   command: podman rmi localhost:9000/test/image

playbooks/functional-test/restricted.yaml

@@ -21,7 +21,10 @@
   command: docker login localhost:9000 -u writeuser -p writepass
 
 - name: Push the test image to the registry
-  command: docker push localhost:9000/test/image
+  # Use a lot of concurrency to check registry with concurrent pushes
+  shell: printf "1\n2\n3\n4\n" | xargs -P 4 -I DNE docker push localhost:9000/test/image
+  args:
+    executable: /bin/bash
 
 - name: Remove the test image from the local cache
   command: docker rmi localhost:9000/test/image

playbooks/functional-test/run.yaml

@@ -24,6 +24,7 @@
           - skopeo
           - buildah
           - podman
+          - findutils
         state: present
       become: true
     - name: Run setup tasks

playbooks/functional-test/setup.yaml

@@ -61,7 +61,7 @@
   command: "cp /run/user/{{ ansible_user_uid }}/auth.json {{ workspace }}/containers-auth.json"
 
 - name: Create a local containers image
-  shell: buildah commit --rm $(buildah from scratch) testimage
+  shell: buildah commit --rm $(buildah from docker.io/zuul/zuul-registry) testimage
 
 - name: Ensure image file is not present
   file: