Fix var reference

ansible/roles/metacluster/tasks/cleanup.yml

@@ -1,4 +1,4 @@
 - name: Zero-out disk
   ansible.builtin.shell:
-    cmd: dd bs=1M count=$(df -m . | awk '/[0-9]%/{print $(NF-2)}') if=/dev/zero of=./zero; sync; sync; rm -f ./zero
+    cmd: nice -n 10 dd bs=1M count=$(df -m . | awk '/[0-9]%/{print $(NF-2)}') if=/dev/zero of=./zero; sync; sync; rm -f ./zero
     chdir: /opt/metacluster

ansible/roles/metacluster/tasks/components.yml

@@ -27,7 +27,7 @@
     path: /opt/firstboot/ansible/vars/metacluster.yml
     block: |2
       {{ item.key }}:
-        {{ item.value.chart_values | default('~') }}
+        {{ item.value.helm.chart_values | default('~') }}
     marker: "# {mark} ANSIBLE MANAGED BLOCK -- {{ item.key }}"
   loop: "{{ lookup('ansible.builtin.dict', components) }}"
   loop_control: