diff --git a/group_vars/centos7.yml b/group_vars/centos7.yml
new file mode 100644
index 0000000..5fdd45a
--- /dev/null
+++ b/group_vars/centos7.yml
@@ -0,0 +1,10 @@
+---
+# default resources for new vm
+dsk_size: 20
+mem_size: 1536
+num_cpus: 1
+
+# extra args for virt-install
+virt_install_os_args: >
+  --extra-args "ks=http://boot.foo.sh/ks/centos7.ks console=ttyS0 net.ifnames=0 ksdevice=eth0"
+  --location http://centos.mirror.gnu.fi/7/os/x86_64