Switch to using a squashed image for the build workers

buildman/templates/cloudconfig.yaml

@@ -19,18 +19,13 @@ coreos:
     group: {{ coreos_channel }}
 
   units:
-    - name: quay-builder.service
-      command: start
-      content: |
-        [Unit]
-        Description=Quay builder container
-        Author=Jake Moshenko
-        After=docker.service
-
-        [Service]
-        TimeoutStartSec=600
-        TimeoutStopSec=2000
-        ExecStartPre=/usr/bin/docker login -u {{ quay_username }} -p {{ quay_password }} -e unused quay.io
-        ExecStart=/usr/bin/docker run --rm --net=host --name quay-builder --privileged --env-file /root/overrides.list -v /var/run/docker.sock:/var/run/docker.sock -v /usr/share/ca-certificates:/etc/ssl/certs quay.io/coreos/registry-build-worker:{{ worker_tag }}
-        ExecStop=/usr/bin/docker stop quay-builder
-        ExecStopPost=/bin/sh -xc "/bin/sleep 120; /usr/bin/systemctl --no-block poweroff"
+    {{ dockersystemd('quay-builder',
+                     'quay.io/coreos/registry-build-worker',
+                     quay_username,
+                     quay_password,
+                     worker_tag,
+                     extra_args='--net=host --privileged --env-file /root/overrides.list -v /var/run/docker.sock:/var/run/docker.sock -v /usr/share/ca-certificates:/etc/ssl/certs',
+                     exec_stop_post=['/bin/sh -xc "/bin/sleep 120; /usr/bin/systemctl --no-block poweroff"'],
+                     flattened=True,
+                     restart_policy='no'
+                    ) | indent(4) }}