allow cli options

defaults/main.yml

@@ -15,3 +15,8 @@ dockerengine_storage_vg: vg_docker
 dockerengine_storage_lv: lv_docker
 dockerengine_storage_size: 100G
 dockerengine_base_dir: /var/lib/docker
+
+dockerengine_cli_options:
+  - selinux-enabled
+  - log-driver=journald
+  - signature-verification=false

templates/etc/sysconfig/docker.j2

@@ -2,7 +2,7 @@
 # /etc/sysconfig/docker
 
 # Modify these options if you want to change the way the docker daemon runs
-OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false'
+OPTIONS='{{ dockerengine_cli_options | prefix | join(' ') }}'
 if [ -z "${DOCKER_CERT_PATH}" ]; then
     DOCKER_CERT_PATH=/etc/docker
 fi