diff --git a/docker/swarm/stack/aptly.yml b/docker/swarm/stack/aptly.yml
index 36c719b..89ec5ec 100644
--- a/docker/swarm/stack/aptly.yml
+++ b/docker/swarm/stack/aptly.yml
@@ -2,6 +2,7 @@
 - system.docker
 parameters:
   _param:
+    docker_stack_aptly_public_replicas: 3
     docker_image_aptly:
       api: tcpcloud/aptly-api
       public: tcpcloud/aptly-public
@@ -25,7 +26,7 @@
                 - /srv/volumes/aptly:/var/lib/aptly
             public:
               deploy:
-                replicas: 3
+                replicas: ${_param:docker_stack_aptly_public_replicas}
                 restart_policy:
                   condition: any
               image: ${_param:docker_image_aptly:public}
diff --git a/docker/swarm/stack/docker.yml b/docker/swarm/stack/docker.yml
index 7f8c153..f861718 100644
--- a/docker/swarm/stack/docker.yml
+++ b/docker/swarm/stack/docker.yml
@@ -2,6 +2,7 @@
   _param:
     docker_image_registry: registry:2
     docker_image_visualizer: dockersamples/visualizer
+    docker_stack_registry_replicas: 3
   docker:
     client:
       stack:
@@ -11,7 +12,7 @@
               environment:
                 REGISTRY_HTTP_SECRET: ${_param:docker_registry_http_secret}
               deploy:
-                replicas: 3
+                replicas: ${_param:docker_stack_registry_replicas}
                 restart_policy:
                   condition: any
               image: ${_param:docker_image_registry}
diff --git a/jenkins/slave/libvirt.yml b/jenkins/slave/libvirt.yml
index e40b841..4ebaae2 100644
--- a/jenkins/slave/libvirt.yml
+++ b/jenkins/slave/libvirt.yml
@@ -14,6 +14,9 @@
           version: latest
         libvirt-bin:
           version: latest
+        # Reguired to simplify building custom cloud-init.iso
+        cloud-image-utils:
+          version: latest
   # Ensure FORWARD chain to be ACCEPT to avoid issue when running with docker
   # 1.13 and newer that sets chain to DROP, see:
   #   https://github.com/docker/docker/pull/28257