diff --git a/inventories/chaosknoten/group_vars/all.yaml b/inventories/chaosknoten/group_vars/all.yaml
new file mode 100644
index 0000000..d6cd2ce
--- /dev/null
+++ b/inventories/chaosknoten/group_vars/all.yaml
@@ -0,0 +1,7 @@
+# ansible_pull
+# ansible_pull__age_private_key needs to be defined per host (probably HOST.sops.yaml).
+ansible_pull__repo_url: https://git.hamburg.ccc.de/CCCHH/ansible-infra.git
+ansible_pull__inventory: inventories/chaosknoten
+ansible_pull__playbook: playbooks/maintenance.yaml
+ansible_pull__timer_on_calendar: "*-*-* 04:00:00 Europe/Berlin"
+ansible_pull__timer_randomized_delay_sec: 30min